JP2014183640A - Power storage system - Google Patents

Abstract

A power storage system that easily secures a necessary amount of power when a power failure occurs is provided.
A use device selection unit (222) selects an electric device (26) to be used in a time zone when a power failure occurs. The power consumption prediction unit (223) predicts the power consumed by the electrical device selected by the device selection unit during a time when a power failure occurs. The initial remaining capacity setting unit (224) uses the first power amount obtained by multiplying the predicted power and the time length of the time zone when the power failure occurs, as a storage battery (143) required when the power failure occurs. Set the remaining amount. The control unit discharges the storage battery when the remaining battery level detected by the remaining battery level detection unit (141) is larger than the remaining battery level set by the initial remaining capacity setting unit when no power failure occurs. When the remaining amount of the storage battery detected by the remaining amount detection unit is smaller than the remaining amount of the storage battery set by the initial remaining amount setting unit, the storage battery is charged.
[Selection] Figure 1

Description

  The present invention relates to a power storage system.

  In recent years, power storage systems including storage batteries have become widespread. By using the electric power stored in the storage battery, electric power can be supplied to the electric equipment even when a power failure occurs. Moreover, an electricity bill can be made cheap by charging a storage battery at night when there is little electric power demand, and using the electric power which a storage battery stores in the daytime.

  Japanese Patent Laid-Open No. 2008-128605 discloses a power storage air conditioner. In this electricity storage type air conditioner, a minimum electricity storage remaining amount is set. The minimum remaining power level is, for example, an arbitrary remaining level such as ½ of the storage capacity of the storage battery. The power storage air conditioner supplies stored power from the storage battery to the air conditioning unit so that the storage battery retains at least a remaining power storage amount equal to or greater than a preset minimum power storage amount. Therefore, when the supply of external power is interrupted, the stored power of the storage battery can be supplied to an external device (for example, a television or a radio).

JP 2008-128605 A

  However, if the minimum amount of remaining power is roughly set, it is difficult to secure the necessary amount of power when a power failure occurs.

  The objective of this invention is providing the electrical storage system which is easy to ensure the amount of electric power required when the power failure has generate | occur | produced.

  A power storage system according to an embodiment of the present invention includes a storage battery, a time zone setting unit, a used device selection unit, a power consumption prediction unit, an initial remaining amount setting unit, a remaining amount detection unit, and a control unit. The time zone setting unit sets a time zone during which a power failure occurs. The used device selection unit selects an electrical device to which the storage battery supplies power in the time zone set by the time zone setting unit. The power consumption prediction unit predicts the power consumed by the electrical device selected by the used device setting unit in the time zone set by the time zone setting unit. The initial remaining amount setting unit needs the first power amount obtained by multiplying the power predicted by the power consumption prediction unit by the time length set by the time zone setting unit when a power failure occurs. Set the remaining battery level. The remaining amount detection unit detects the remaining amount of the storage battery. The control unit controls charging / discharging of the storage battery. When there is no power failure, the control unit discharges the storage battery when the remaining battery level detected by the remaining battery level detection unit is greater than the remaining battery level set by the initial remaining battery level setting unit. When the remaining amount of the storage battery detected by the remaining amount detection unit is smaller than the remaining amount of the storage battery set by the amount setting unit, the storage battery is charged.

  The power storage system according to the embodiment of the present invention easily secures the amount of power required when a power failure occurs.

FIG. 1 is a block diagram showing an example of a schematic configuration of a power storage system according to the first embodiment of the present invention. FIG. 2 is a block diagram illustrating an example of a schematic configuration of a controller included in the power storage system illustrated in FIG. 1. FIG. 3 is a flowchart illustrating normal processing executed by the control unit of the power storage system according to the first embodiment. FIG. 4 is a flowchart illustrating a process during a power failure executed by the control unit of the power storage system according to the first embodiment. FIG. 5 is a flowchart illustrating normal processing executed by the control unit of the power storage system according to the first embodiment. FIG. 6 is a block diagram illustrating an example of a schematic configuration of the controller 22A in the application example 2 of the first embodiment. FIG. 7 is a flowchart illustrating a power failure process performed by the control unit of the power storage system according to the application example 2 of the first embodiment. FIG. 8 is a block diagram showing an example of a schematic configuration of a power storage system according to the second embodiment of the present invention. FIG. 9 is a block diagram illustrating an example of a schematic configuration of a controller included in the power storage system illustrated in FIG. 9. FIG. 10 is a flowchart illustrating normal processing executed by the control unit of the power storage system according to the second embodiment. FIG. 11 is a flowchart illustrating processing at the time of a power failure executed by the control unit of the power storage system according to the second embodiment.

  A power storage system according to an embodiment of the present invention includes a storage battery, a time zone setting unit, a used device selection unit, a power consumption prediction unit, an initial remaining amount setting unit, a remaining amount detection unit, and a control unit. The time zone setting unit sets a time zone during which a power failure occurs. The used device selection unit selects an electrical device to which the storage battery supplies power in the time zone set by the time zone setting unit. The power consumption prediction unit predicts the power consumed by the electrical device selected by the used device setting unit in the time zone set by the time zone setting unit. The initial remaining amount setting unit needs the first power amount obtained by multiplying the power predicted by the power consumption prediction unit by the time length set by the time zone setting unit when a power failure occurs. Set the remaining battery level. The remaining amount detection unit detects the remaining amount of the storage battery. The control unit controls charging / discharging of the storage battery. When there is no power failure, the control unit discharges the storage battery when the remaining battery level detected by the remaining battery level detection unit is greater than the remaining battery level set by the initial remaining battery level setting unit. When the remaining amount of the storage battery detected by the remaining amount detection unit is smaller than the remaining amount of the storage battery set by the amount setting unit, the storage battery is charged.

  In the above power storage system, the remaining amount of the storage battery is set using the power predicted to be consumed by the electrical device when a power failure occurs. For this reason, it is easy to secure a necessary amount of power when a power failure occurs.

  Preferably, the power storage system further includes a power generation device. The power generation device supplies power to the electrical device selected by the device-in-use selection unit during the time zone set by the time zone setting unit.

  In such an aspect, the amount of power that can be supplied when a power failure occurs increases. Therefore, for example, it is possible to cope with a case where the power failure time becomes long or the power consumption increases.

  Preferably, in the aspect including the power generation device, the power storage system further includes a generated power prediction unit. The generated power prediction unit predicts the power generated by the power generation device in the time zone set by the time zone setting unit. The initial remaining amount setting unit is obtained by subtracting the second power amount obtained by multiplying the power predicted by the generated power prediction unit and the time length of the time zone set by the time zone setting unit from the first power amount. The third power amount is set to the remaining amount of storage battery required when a power failure occurs.

  In such an aspect, the remaining amount of the storage battery can be set smaller than when the power generation device is not provided. That is, more electric power stored in the storage battery can be used than when no power generation device is provided.

  Preferably, the power storage system further includes a reference remaining amount setting unit, a priority order setting unit, and a stopped device selection unit. The reference remaining amount setting unit sets a remaining amount smaller than the remaining amount of the storage battery set by the initial remaining amount setting unit. The priority order setting unit sets a priority order when using the electrical device in the time zone set by the time zone setting unit. The stop device selection unit sets the priority setting unit when the remaining battery level detected by the remaining battery level detection unit is less than the remaining battery level set by the reference remaining level setting unit when a power failure occurs. The electrical devices that stop the power supply from the storage battery are selected in descending order of priority. The control unit stops power supply to the electrical device selected by the stop device selection unit.

  In such an aspect, when the remaining capacity of the storage battery is reduced when a power failure occurs, the use of the electric device having a low priority is stopped. For this reason, it is difficult to reduce the remaining amount of the storage battery. As a result, the time during which an electric device with a high priority can be used becomes longer.

  Preferably, the time zone setting unit sets a time zone in which a power failure occurs each time a predetermined time elapses. The power consumption prediction unit predicts the power consumed by the electrical device selected by the device-use setting unit during the time zone set by the time zone setting unit every time the time zone setting unit sets the time zone. The initial remaining amount setting unit is obtained by multiplying the power predicted by the power consumption prediction unit by the time length set by the time zone setting unit each time the time zone setting unit sets the time zone. Set the amount of power to the remaining amount of storage battery required when a power failure occurs.

  In such an aspect, the remaining amount of the storage battery is set periodically. Therefore, an appropriate remaining amount can be set.

  Hereinafter, more specific embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated. In addition, each figure referred below demonstrates the simplified main component required in order to demonstrate this invention among the structural members of embodiment of this invention for convenience of explanation. Therefore, the power storage system according to the present invention can include arbitrary constituent members that are not shown in the drawings referred to in this specification. Moreover, the dimension of the member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each member, etc. faithfully.

[First Embodiment]
A power storage system 10 according to a first embodiment of the present invention will be described with reference to FIG.

[Entire configuration of power storage system]
The power storage system 10 includes a power conditioner 12, a storage battery box 14, a plurality of power consumption acquisition units 16, a repeater 18, a router 20, and a controller 22.

  The power conditioner 12 includes a control unit 120, a bidirectional DC / AC converter 121, a bidirectional DC / DC converter 122, a protection relay 123, an interconnection relay 124, and a self-supporting relay 125.

  The storage battery box 14 includes a control unit 140, a remaining amount detection unit 141, a breaker 142, a storage battery 143, and a plurality of changeover switches 144.

  The bidirectional DC / AC converter 121 is connected to the bidirectional DC / DC converter 122, the protection relay 123 and the self-supporting relay 125. The bidirectional DC / DC converter 122 is connected to the storage battery 143 via the breaker 142. The protection relay 123 is connected to the interconnection relay 124. The interconnection relay 124 is connected to the power system 24. The self-supporting relay 125 is connected to each changeover switch 144. Each changeover switch 144 includes two contacts 144A and 144B and one switch 144C. The contact 144A is connected to the self-supporting relay 125. The contact 144B is connected to the power system 24. The switch 144C is connected to the power consumption acquisition unit 16. The switch 144C is connected to one of the two contacts 144A and 144B. The electric device 26 is connected to the power consumption acquisition unit 16.

  The bidirectional DC / AC converter 121 converts AC power supplied from the power system 24 into DC power to be supplied to the bidirectional DC / DC converter 122. The bidirectional DC / DC converter 122 converts the direct current power converted by the bidirectional DC / AC converter 121 into direct current power to be supplied to the storage battery 143.

  The bidirectional DC / DC converter 122 converts the direct current power supplied from the storage battery 143 into direct current power to be supplied to the bidirectional DC / AC converter 121. The bidirectional DC / AC converter 121 converts the DC power converted by the bidirectional DC / DC converter 122 into AC power to be supplied to the electric device 26.

  The control unit 120 receives a signal transmitted from the controller 22. The control unit 120 controls the operation of the power conditioner 12 based on the received signal. Specifically, when charging the storage battery 143, the control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. On the other hand, when the electric power stored in the storage battery 143 is used, the control unit 120 turns off the protection relay 123 and the interconnection relay 124 and turns on the self-supporting relay 125.

  The control unit 120 receives a signal transmitted from the current sensor 28. The current sensor 28 is arranged between the interconnection relay 124 and the power system 24 and detects whether or not a power failure has occurred. The control unit 120 transmits a signal indicating whether or not a power failure has occurred to the controller 22 based on the received signal (the signal transmitted by the current sensor 28).

  The control unit 140 receives a signal transmitted from the controller 22 via the control unit 120. The control unit 140 controls the operation of the storage battery box 14 based on the received signal. Specifically, when charging the storage battery 143, the control unit 140 turns on the breaker 142 to charge the storage battery 143 and connects the switch 144C to the contact 144B in each changeover switch 144. When discharging the storage battery 143, the control unit 140 turns on the breaker 142 to discharge the storage battery 143 and connects the switch 144C to the contact 144A in each changeover switch 144.

  The control unit 140 receives a signal from the remaining amount detection unit 141. The remaining amount detection unit 141 detects the remaining amount of the storage battery 143. The remaining amount detection unit 141 transmits the detected remaining amount to the control unit 140. The control unit 140 transmits the received remaining amount of the storage battery 143 to the controller 22 via the control unit 120.

  The power consumption acquisition unit 16 acquires the power that is actually consumed by an electrical device 26 (for example, a refrigerator, an air conditioner, a washing machine, a lighting fixture, an electromagnetic cooker, a television, etc.) used in the home. The power consumption acquisition unit 16 transmits the acquired power consumption of the electrical device 26 to the repeater 18. The power consumption acquisition unit 16 is built in, for example, a tap inserted into an outlet. The tap has an insertion port for inserting a plug included in the electric device 26. In addition, the power consumption acquisition part 16 may be incorporated in the electric equipment 26, and may be provided in the switchboard.

  The repeater 18 receives the power consumption of the electrical device 26 transmitted by the power consumption acquisition unit 16. The repeater 18 accumulates the power consumption of each electrical device 26 for each time zone. The time zone may be, for example, a time zone with a time length of 1 hour, such as 9 o'clock to 10 o'clock, or a time zone with a time length of several hours, such as 9 o'clock to 12 o'clock. There may be. For example, the repeater 18 acquires the power consumption of each electrical device 26 every predetermined time (for example, 5 minutes), and based on the acquired power consumption, the average value or the maximum value of each time zone for each electrical device 26. Accumulate values. The power consumption accumulated in the repeater 18 is for a predetermined period (for example, for the past two years). The repeater 18 transmits the power consumption of the electrical device 26 to the router 20 in response to a request from the router 20.

  In response to a request from the controller 22, the router 20 requests the repeater 18 to transmit the power consumption of the electric device 26. The router 20 receives the power consumption of the electrical device 26 transmitted by the repeater 18. The router 20 transmits the received power consumption of the electrical device 26 to the controller 22.

[controller]
As shown in FIG. 2, the controller 22 includes a control unit 220, a time zone setting unit 221, a used device selection unit 222, a power consumption prediction unit 223, and an initial remaining amount setting unit 224.

  The time zone setting unit 221 sets a time zone in which a power failure occurs. The time zone may be, for example, a time zone with a time length of 1 hour, such as 9 o'clock to 10 o'clock, or a time zone with a time length of several hours, such as 9 o'clock to 12 o'clock. There may be. The time zone in which a power failure occurs is set as follows, for example.

[When preparing for planned power outages]
When preparing for a planned power outage, the time zone when the power outage occurs is known in advance. You may set the time slot | zone when a power failure generate | occur | produces based on the information which the user input. Or you may set based on the information which the time slot | zone setting part 221 acquired via the internet. A specific date and time is set as a time zone when a power failure occurs, for example, from 2 to 6 pm on November 12. In addition, when a planned power outage is periodically performed, it is not necessary to set a specific date. For example, only the time zone in which a power failure occurs may be set, such as from 2 pm to 6 pm. When the planned power outage is periodically performed, the time zone setting unit 221 sets a time zone in which the power outage occurs every time the previously set time zone ends.

[When preparing for sudden power outages]
When preparing for a sudden power outage, the time zone when the power outage occurs is not known in advance. In this case, the user inputs a time (a specific length of time, for example, 1 hour) in which the electric device 26 is desired to be used when a power failure occurs. The time zone setting unit 221 sets a time zone from the current time until the time input by the user elapses to a time zone where a power failure occurs. In this case, the user may not be able to use the electrical device 26 in all of the time periods in which a power outage actually occurs, but a part of the time period in which the power outage actually occurs (for example, immediately after the power outage occurs) ), The user can use the electric device 26. The time zone setting unit 221 sets a time zone in which a power failure occurs every time a predetermined time (for example, 10 minutes) elapses. For example, a timer (not shown) provided in the controller 22 may be used to determine whether or not the predetermined time has elapsed. In addition, you may set by default the time which can use an electric equipment when the power failure has generate | occur | produced.

  The time zone setting unit 221 may set a time zone in which a power failure occurs for each of the case of preparing for a planned power outage and the case of preparing for a sudden power outage. You may set the time slot | zone when a power failure generate | occur | produces about either with the case where it equips.

  The used device selection unit 222 selects the electrical device 26 to be used in the time zone set by the time zone setting unit 221. The electric device 26 used in the time zone when the power failure occurs may be selected by the used device selection unit 222 according to the user input, or may be selected by the used device selection unit 222 by default. The used device selection unit 222 selects, for example, the electric device 26 to be used for each time zone. The electric device 26 used in a time zone where a power failure occurs is selected around the electric device 26 that the user absolutely wants to use in the time zone. For example, since it is preferable that the refrigerator can be used all day, the refrigerator is selected even when a power failure occurs in any time zone. Since it is preferable to be able to use the lighting at night, if a power outage occurs at night, the lighting is selected.

  The power consumption prediction unit 223 predicts the power consumed by the electrical device 26 selected by the used device selection unit 222 during the time zone set by the time zone setting unit 221. The power consumption is predicted as follows, for example.

  The power consumption prediction unit 223 acquires the power consumption of the electrical device 26 stored in the repeater 18 via the router 20. The power consumption prediction unit 223 consumes the power consumed by the electrical device 26 selected by the used device selection unit 222 in the time zone set by the time zone setting unit 221 based on the power consumption of the electrical device 26 stored in the repeater 18. Predict.

  Specifically, the power consumption prediction unit 223 is, for example, an average value or maximum value of power consumption in the same time zone as the time zone set by the time zone setting unit 221 yesterday. 221 is predicted to be power consumption in the set time zone. Note that the power consumption prediction unit 223 has the same time zone as the time zone set by the time zone setting unit 221, and the time zone setting unit 221 determines the average value and the maximum value of power consumption in the time zone for the past several days. It may be predicted that the power consumption of the set time zone, or the average value and the maximum value of the power consumption in the same time zone of the same day last year are the same as the time zone set by the time zone setting unit 221. The power consumption in the time zone set by the time zone setting unit 221 may be predicted.

  When preparing for a sudden power failure, the power consumption prediction unit 223, for example, the current power consumption, that is, the time set by the time zone setting unit 221 of the latest power consumption among the power consumption stored in the repeater 18. The power consumption of the belt is predicted. When preparing for a sudden power failure, the power consumption prediction unit 223 is the same time zone as the time zone set by the time zone setting unit 221 and the maximum value of power consumption in the time zone for the past several days. May be predicted as the power consumption in the time zone set by the time zone setting unit 221, or in the same time zone as the time zone set by the time zone setting unit 221 and in the time zone of the same day last year May be predicted as the power consumption in the time zone set by the time zone setting unit 221, or the maximum value of yesterday's power consumption may be predicted as the power consumption in the time zone set by the time zone setting unit 221. Also good.

  When power consumption based on actual use is not accumulated in the repeater 18, the power consumption prediction unit 223 may use power consumption or rated power consumption acquired through the Internet, for example.

  The initial remaining amount setting unit 224 is obtained by multiplying the power consumption (unit: kW) predicted by the power consumption prediction unit 223 and the time length (unit: h) of the time zone set by the time zone setting unit 221. The amount of power (unit: kWh), that is, the amount of power predicted to be consumed by the electrical device 26 when a power failure occurs is set as the remaining amount of the storage battery 143. When using a plurality of electrical devices 26, the initial remaining capacity setting unit 224 calculates the amount of power for each electrical device 26. The initial remaining amount setting unit 224 adds up the electric energy obtained for each electric device 26 to be used. The initial remaining amount setting unit 224 sets the amount of power obtained by the addition to the remaining amount of the storage battery 143.

  The initial remaining amount setting unit 224 may set the remaining amount of the storage battery 143 when preparing for a planned power outage and the remaining amount of the storage battery 143 when preparing for a sudden power outage, respectively. Only one of the remaining amount of the storage battery 143 and the remaining amount of the storage battery 143 when preparing for a sudden power failure may be set. When the remaining amount of the storage battery 143 when preparing for a planned power failure and the remaining amount of the storage battery 143 when preparing for a sudden power failure are respectively set, the initial remaining capacity setting unit 224 stores the storage battery 143 when preparing for a planned power failure. Are compared with the remaining amount of the storage battery 143 in case of a sudden power failure, and the larger remaining amount is adopted.

  The control unit 220 transmits the remaining amount (set remaining amount) of the storage battery 143 set by the initial remaining amount setting unit 224 to the control unit 140 via the control unit 120. When a power failure has not occurred, the control unit 140 controls the operation of the storage battery box 14 and the control unit 120 controls the operation of the power conditioner 12 so that the set remaining amount is secured. When a power failure occurs, the control unit 140 controls the operation of the storage battery box 14 and the control unit 120 controls the operation of the power conditioner 12 so that the electric power stored in the storage battery 143 is supplied to the electrical device 26. .

  Next, processing performed by the control unit of the power storage system 10 will be described with reference to a flowchart. The control unit of the power storage system 10 includes a control unit 220 provided in the controller 22, a control unit 120 provided in the power conditioner 12, and a control unit 140 provided in the storage battery box 14. The process described below is executed by any one of the control unit 220 included in the controller 22, the control unit 120 included in the power conditioner 12, and the control unit 140 included in the storage battery box 14.

  With reference to FIG. 3, processing (normal processing) when no power failure occurs will be described. The normal process is executed unless the control unit 220 receives a signal indicating that a power failure has occurred (transmitted by the control unit 120).

First, the control unit 220 determines whether or not to set the remaining amount of the storage battery 143 in S11. The criteria for determining whether or not to set the remaining amount of the storage battery 143 is as follows.
(1) The remaining amount is not yet set (2) The time zone setting unit 221 newly sets a time zone in which a power failure occurs (3) The electric device 26 used in the time zone set by the time zone setting unit 221 The device selection unit 222 has newly selected

  When the remaining amount has not been set yet, when the time zone in which a power failure occurs is newly set, and when the electric device 26 to be used at the time of a power failure is newly selected, the control unit 220 stores the storage battery 143. It is determined that the remaining amount is set (S11: YES). On the other hand, when the time zone in which a power failure occurs is not newly set and when the electric device 26 used at the time of the power failure is not newly selected, the control unit 220 does not set the remaining amount of the storage battery 142. (S11: NO).

  When it is determined that the control unit 220 does not set the remaining amount of the storage battery 143 (S11: NO), the control unit 220 executes the processes after S13 described later. When it is determined that the control unit 220 sets the remaining amount of the storage battery 143 (S11: YES), the control unit 220 sets the remaining amount of the storage battery 143 in S12.

  The process in which the controller 220 sets the remaining amount of the storage battery 143 is as follows.

  First, the control unit 220 requests the initial remaining amount setting unit 224 to set the remaining amount of the storage battery 143. The initial remaining amount setting unit 224 acquires the electrical device 26 selected by the used device selection unit 222. The initial remaining amount setting unit 224 acquires the time zone set by the time zone setting unit 221. The initial remaining amount setting unit 224 provides the power consumption prediction unit 223 with the electrical device 26 selected by the used device selection unit 222 and the time zone set by the power failure time zone 221. The power consumption prediction unit 223 is based on the data provided from the initial remaining amount setting unit 224 (the electric device 26 selected by the used device selection unit 222 and the time zone set by the time zone setting unit 221). The data necessary for setting the remaining amount of the storage battery 143 is determined. When preparing for a planned power outage, the power consumption predicting unit 223 is, for example, the power consumed in the past by the electrical device 26 selected by the used device selecting unit 222 and the same as the time zone set by the time zone setting unit 221. The power consumed in the time zone is used as data necessary for setting the remaining amount of the storage battery 143. When preparing for a sudden power failure, the power consumption prediction unit 223 is, for example, the power consumed in the past by the electric device 26 selected by the device selection unit 222, and the latest power consumption is stored in the remaining battery 143. Make the data necessary to set the amount. The power consumption prediction unit 223 obtains data necessary for setting the remaining amount of the storage battery 143 from the repeater 18 via the router 20. Based on the acquired data, the power consumption prediction unit 223 predicts the power consumed by the electrical device 26 selected by the device selection unit 222 during the time zone set by the time zone setting unit 221. The power consumption prediction unit 223 provides the predicted power consumption to the initial remaining amount setting unit 224. The initial remaining amount setting unit 224 sets the remaining amount of the storage battery 143 based on the power consumption predicted by the power consumption prediction unit 223 and the time length of the time zone set by the time zone setting unit 221. The initial remaining amount setting unit 224 provides the control unit 220 with the remaining amount (set remaining amount) set by the initial remaining amount setting unit 224. The control unit 220 transmits the provided set remaining amount to the control unit 140 via the control unit 120. The control unit 140 sets the received set remaining amount to the remaining amount (initial remaining amount) of the storage battery 143 necessary when a power failure occurs.

  When the above process ends, the control unit 140 acquires the remaining amount (detected remaining amount) of the storage battery 143 detected by the remaining amount detecting unit 141 in S13, and whether or not the detected remaining amount is smaller than the initial remaining amount. Determine whether.

  When the remaining amount of the storage battery 143 is less than the initial remaining amount (S13: YES), the control units 120 and 140 execute a process of charging the storage battery 143 in S14.

The process for charging the storage battery 143 is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so as to charge the storage battery 143 while supplying the electric power of the power system 24 to the electrical device 26.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) When receiving the signal from the control unit 140, the control unit 120 supplies the electric power of the power system 24 to the electric device 26 and controls the operation of the power conditioner 12 so as to charge the storage battery 143.

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144B in each changeover switch 144. The control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. Thereby, the electric power of the electric power system 24 is supplied to the electrical device 26 via the changeover switch 144 and the power consumption acquisition unit 16. Further, the storage battery 143 is charged by the power of the power system 24.

  When the above process ends, the control unit 140 acquires the detected remaining amount in S15 and determines whether or not the detected remaining amount is greater than a predetermined first reference remaining amount. The first reference remaining amount may be a remaining amount that is larger than the initial remaining amount. The first reference remaining amount is appropriately set according to the initial remaining amount. For example, the first reference remaining amount is set when the control unit 140 sets the initial remaining amount.

  When the remaining amount of the storage battery 143 detected by the remaining amount detection unit 141 is greater than a predetermined first reference remaining amount (S15: YES), or when the detected remaining amount is equal to or greater than the initial remaining amount (S13: NO) The control units 120 and 140 execute a process of supplying power to the electrical device 26 in S16.

There are the following three modes for supplying electric power to the electric device 26. The control units 120 and 140 may execute any process.
(1) A mode of supplying power stored in the storage battery 143 and power from the power system 24 to the electric device 26 (2) A mode of supplying only power stored in the storage battery 143 to the electric device 26 (3) Only power from the power system 24 Supplying the electric equipment 26

The process performed in the aspect which supplies the electric power which the storage battery 143 stores and the electric power from the electric power grid | system 24 to the electric equipment 26 is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so that the power stored in the storage battery 143 and the power from the power system 24 are supplied to the electrical device 26.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) When the signal from the control unit 140 is received, the control unit 120 controls the operation of the power conditioner 12 so that the power stored in the storage battery 143 and the power from the power system 24 are supplied to the electric device 26.

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144B in each changeover switch 144. The control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. Thereby, the electric power of the storage battery 143 passes through the breaker 142, the bidirectional DC / DC converter 122, the bidirectional DC / AC converter 121, the protection relay 123, the interconnection relay 124, the changeover switch 144, and the power consumption acquisition unit 16. And supplied to the electric device 26. In addition, power from the power system 24 is supplied to the electrical device 26 via the changeover switch 144 and the power consumption acquisition unit 16.

The process performed in the aspect which supplies only the electric power which the storage battery 143 stores to the electric equipment 26 is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so that only the electric power stored in the storage battery 143 is supplied to the electrical device 26.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) When receiving the signal from the control unit 140, the control unit 120 controls the operation of the power conditioner 12 so that only the electric power stored in the storage battery 143 is supplied to the electric device 26.

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144A in each changeover switch 144. The control unit 120 turns off the protection relay 123 and the interconnection relay 124 and turns on the self-supporting relay 125. Thereby, the electric power of the storage battery 143 is supplied to the electric device 26 via the breaker 142, the bidirectional DC / DC converter 122, the bidirectional DC / AC converter 121, the self-supporting relay 125, the changeover switch 144, and the power consumption acquisition unit 16. To be supplied. Further, the path through which the power system 24 supplies power to the electrical device 26 is blocked.

The process performed in the aspect which supplies only the electric power from the electric power grid | system 24 to the electric equipment 26 is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so that only the electric power from the electric power system 24 is supplied to the electric device 26.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) When the signal from the control unit 140 is received, the control unit 120 controls the operation of the power conditioner 12 so that only the power from the power system 24 is supplied to the electrical device 26.

  Specifically, the control unit 140 turns off the breaker 142 and connects the switch 144C to the contact 144B in each changeover switch 144. The control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. As a result, the power from the power system 24 is supplied to the electrical device 26 via the changeover switch 144 and the power consumption acquisition unit 16. Further, the path through which the storage battery 143 supplies power to the electrical device 26 is blocked.

  When the above process ends, the processes after S11 are repeatedly executed. When the detected remaining amount is smaller than the predetermined first reference remaining amount (S15: NO), the storage battery 143 is charged until the detected remaining amount becomes larger than the predetermined first reference remaining amount.

  Next, the processing when a power failure occurs (processing at the time of a power failure) will be described with reference to FIG. The process at the time of a power failure is a signal (the control unit 120 transmits) indicating that a power failure has not occurred after the control unit 220 receives a signal (the control unit 120 transmits) indicating that a power failure has occurred. This is executed until the control unit 220 receives the data.

  First, the control part 220 performs the process which discharges the storage battery 143 in S101. In addition, since the process which discharges the storage battery 143 is the same as the process performed in the aspect which supplies only the electric power which the storage battery 143 stores to the electric equipment 26 demonstrated by the process of S16 in the process at the time of normal, about the detail Description of is omitted.

  When the above processing is completed, the control unit 220 determines in S102 whether or not the power has been recovered from the power failure. When receiving a signal indicating that a power failure has not occurred, the control unit 220 determines that the power has been recovered from the power failure. When a signal indicating that a power failure has not occurred is not received, the control unit 220 determines that the power has not recovered from the power failure.

  When not recovering from the power failure (S102: NO), it waits until recovery from the power failure. When recovering from the power failure (S102: YES), the robot moves to the location indicated by (A) in FIG. That is, the processes after S13 in the normal process are executed.

  In such a power storage system 10, the remaining amount of the storage battery 143 is set using power predicted to be consumed by the electrical device 26 when a power failure occurs. For this reason, it is easy to secure a necessary amount of power when a power failure occurs.

  Moreover, in the electrical storage system 10, when preparing for sudden power failure, the remaining amount of the storage battery 143 is set periodically. Therefore, an appropriate remaining amount can be set.

[Application 1 of the first embodiment]
You may change the power supply which supplies electric power to the electric equipment 26 for every time slot | zone. For example, the electric power of the electric power system 24 may be used without using the electric power of the storage battery 143 in the time zone when the electricity rate is low. FIG. 5 is a flowchart showing a normal process executed by the control unit of the power storage system in such a mode.

  With reference to FIG. 5, normal processing executed by the control unit of the power storage system will be described. In addition, about the same process as 1st Embodiment, the same step number as 1st Embodiment is attached | subjected and the detailed description is abbreviate | omitted.

  In the above aspect, after the process of S15 is executed, the process of S17 is executed. Note that the processing of S17 is also executed when the detected remaining amount is smaller than the initial remaining amount. Further, either S16A or S16B is executed instead of S16.

  The process of S17 is a process of determining whether or not it is a predetermined time zone. The predetermined time zone is, for example, a time zone in which a charge (electricity charge) when using the power of the power system 24 is lower than other time periods. The control unit 140 executes the process of S17. For example, a timer (not shown) provided in the storage battery box 14 may be used to determine whether or not it is a predetermined time zone.

  When it is not the predetermined time zone (S17: NO), the control unit 140 executes the process of S16A. Since the process of S16A is the same as the process executed in the aspect of supplying only the electric power stored in the storage battery 143 to the electric device 26 described in the process of S16 in the first embodiment, the detailed description thereof is omitted. To do.

  When it is a predetermined time zone (S17: YES), the control unit 140 executes the process of S16B. The process of S16B is the same as the process executed in the aspect of supplying only the electric power from the power system 24 to the electric device 26 described in the process of S16 in the first embodiment. Omitted.

  When the above process ends, the processes after S11 are repeatedly executed.

  In the power storage system according to this application example, since the electric power of the electric power system 24 is used in the time zone when the electric charge is low, the electric charge can be reduced.

[Application 2 of the first embodiment]
When a power failure occurs, the electrical equipment 26 to be used may be reduced according to the remaining capacity of the storage battery 143.

  FIG. 6 is a block diagram showing an example of a schematic configuration of the controller 22A in this application example. FIG. 7 is a flowchart illustrating processing at the time of a power failure executed by the control unit of the power storage system according to this application example.

  As illustrated in FIG. 6, the controller 22A includes a reference remaining amount setting unit 225 and a priority order setting unit 226, as compared with the first embodiment.

  The reference remaining amount setting unit 225 sets a remaining amount (second reference remaining amount) smaller than the remaining amount of the storage battery 143 set by the initial remaining amount setting unit 224. The second reference remaining amount is a reference for reducing the number of electric devices 26 used when a power failure occurs. Every time the initial remaining amount is set, the initial remaining amount setting unit 224 provides the set initial remaining amount to the reference remaining amount setting unit 225. The reference remaining amount setting unit 225 sets the second reference remaining amount each time the initial remaining amount is provided from the initial remaining amount setting unit 224. The second reference remaining amount may be one or plural. The reference remaining amount setting unit 225 transmits the set second reference remaining amount to the control unit 220. The control unit 220 transmits the received second reference remaining amount to the control unit 140 via the control unit 120.

  The priority order setting unit 226 sets a priority order when using the electrical device 26 in the time zone set by the time zone setting unit 221. The priority order setting unit 226 selects the electrical device 26 to be used preferentially from the electrical devices 26 selected by the used device selection unit 222 and determines the priority order.

  The priority order is determined such that, among the electrical devices 26 selected by the used device selection unit 222, the electrical device 26 that is absolutely necessary when the power failure occurs has the highest ranking. The priority order may change from time to time. For example, since the refrigerator is the electric device 26 that should always be used, the ranking of the refrigerator is the highest. Since lighting is necessary at night, lighting ranks high at night. The ranking of the electric equipment 26 used for entertainment such as game machines and televisions is low. The priority order may be set by default or may be set according to a user input.

  The used device selection unit 222 provides the selected electric device 26 to the priority setting unit 226 every time the electric device 26 to be used is selected. The priority setting unit 226 sets the priority every time the electrical device 26 selected from the used device selection unit 222 is provided. The priority order setting unit 226 transmits the set priority order to the control unit 220. The control unit 220 transmits the received priority order to the control unit 140 via the control unit 120.

  With reference to FIG. 7, processing at the time of a power failure executed by the control unit of the power storage system according to this application example will be described. In addition, about the same process as 1st Embodiment, the same step number as 1st Embodiment is attached | subjected and the detailed description is abbreviate | omitted.

  In this application example, the process of S103 and the process of S104 are executed between S101 and S102.

  In S103, the control unit 140 acquires the detected remaining amount and compares it with the received second reference remaining amount. When the detected remaining amount is greater than or equal to the second reference remaining amount (S103: NO), the control unit 140 executes the processing after S102. On the other hand, when the detected remaining amount is smaller than the second reference remaining amount (S103: YES), the control unit 140 stops the use of the electrical device 26 in S104.

The process of stopping the use of the electric device 26 is as follows.
(1) The control unit 140 selects the electrical device 26 that stops the power supply from the storage battery 143 in order of decreasing priority in the received priority order.
(2) In the changeover switch 144 connected to the selected electrical device 26, the control unit 140 connects the switch 144C to the terminal 144B.

  By executing the process (2), the electric power from the storage battery 143 is not supplied to the electrical device 26 connected to the changeover switch 144 in which the switch 144C is connected to the terminal 144B. Further, since a power failure has occurred, the electric equipment 26 is not supplied with power from the power system 24. Accordingly, power is not supplied to the electrical device 26. As a result, use of the electrical device 26 is stopped.

  As is clear from the above description, in the present embodiment, the control unit 140 functions as a stop device selection unit.

  In the power storage system according to this application example, when the remaining amount of the storage battery 143 is reduced when a power failure occurs, the use of the electrical device 26 having a low priority is stopped. Therefore, the remaining amount of the storage battery 143 is difficult to decrease. As a result, the time during which the electrical device 26 having a higher priority can be used becomes longer.

  In this application example, the priority order is set in advance. However, for example, when the remaining capacity of the storage battery 143 is less than the reference remaining capacity without setting the priority order in advance, the electricity is stopped. You may confirm the apparatus 26 with a user.

[Second Embodiment]
Subsequently, a power storage system according to a second embodiment of the present invention will be described with reference to FIGS. 8 and 9. Compared with the first embodiment, the power storage system 10A of this embodiment includes a solar cell 30 and a power conditioner 32 as a power generation device (see FIG. 8). A power conditioner 12A is provided instead of the power conditioner 12 (see FIG. 8). A controller 22B is provided instead of the controller 22 (see FIGS. 8 and 9).

  The solar cell 30 generates power using sunlight. The solar cell 30 is divided into three blocks 30A, 30B, and 30C. The blocks 30A and 30B are connected to the power conditioner 32. The block 30C of the solar cell 30 is connected to the power conditioner 12A.

  The power conditioner 32 includes a control unit 320, a DC / DC converter 321, a DC / AC converter 322, a protection relay 323, an interconnection relay 324, and a self-supporting relay 325.

  The power conditioner 12 </ b> A further includes a DC / DC converter 126, a changeover switch 127, a generated power acquisition unit 128 and a storage unit 129, as compared with the power conditioner 12.

  The DC / DC converter 126 is connected to the bidirectional DC / AC converter 121 and the bidirectional DC / DC converter 122. The changeover switch 127 includes two contacts 127A and 127B and one switch 127C. The contact 127 </ b> A is connected to the DC / DC converter 321. The contact 127B is connected to the DC / DC converter 126. The switch 127C is connected to the block 30C of the solar cell 30. The switch 127C is connected to one of the two contacts 144A and 144B.

  The DC / DC converter 321 is connected to the blocks 30A and 30B and to the contact 127A of the changeover switch 127. The DC / AC converter 322 is connected to the DC / DC converter 321, the protection relay 323 and the self-standing relay 325. The protection relay 323 is connected to the interconnection relay 324. The interconnection relay 324 is connected to the power system 24.

  In the example shown in FIG. 8, two blocks 30A and 30B are connected to one DC / DC converter 321, but one DC / DC converter may be connected to each of blocks 30A and 30B.

  The DC / DC converter 321 converts the DC power supplied from the blocks 30 </ b> A and 30 </ b> B into DC power to be supplied to the DC / AC converter 322. The DC / AC converter 322 converts the DC power converted by the DC / DC converter 321 into AC power to be supplied to the electrical device 26. Further, the AC power converted by the DC / AC converter 322 is provided to the power company via the power system 24.

  Here, a current sensor 34 is disposed between the current sensor 28 and the power system 24. The current sensor 34 detects the power flow. Based on the signal from the current sensor 34, the controller 22B determines whether the power is being sold or purchased and displays the determination result on a display screen (not shown).

  The DC / DC converter 126 is for supplying the DC power supplied from the block 30C of the solar cell 30 to the bidirectional DC / AC converter 121 and the bidirectional DC / DC converter 122 via the changeover switch 127. Convert to DC power.

  The changeover switch 127 supplies the DC power supplied from the block 30 </ b> C of the solar battery 30 to the DC / DC converter 126 or the DC / DC converter 321. Specifically, the changeover switch 127 supplies the DC power supplied from the block 30C of the solar cell 30 to the DC / DC converter 321 when a power failure has not occurred, and when the power failure has occurred, DC power supplied from the block 30 </ b> C of the battery 30 is supplied to the DC / DC converter 126.

  The generated power acquisition unit 128 acquires the generated power by the block 30C of the solar cell 30. The generated power acquisition unit 128 transmits the acquired generated power to the storage unit 129. The storage unit 129 accumulates power generated by the block 30C of the solar cell 30 for each time zone. The time zone may be, for example, a time zone with a time length of 1 hour, such as 9 o'clock to 10 o'clock, or a time zone with a time length of several hours, such as 9 o'clock to 12 o'clock. There may be. For example, the storage unit 129 acquires the power generated by the block 30C of the solar cell 30 every predetermined time (for example, 5 minutes), and accumulates the average value and the minimum value of each time zone based on the acquired power generation. To do. The generated power stored in the storage unit 129 is for a predetermined period (for example, for the past two years). The storage unit 129 accumulates weather for each time zone. The storage unit 129 transmits the generated power of the block 30C of the solar cell 30 to the controller 22B via the control unit 120 in response to a request from the controller 22B performed via the control unit 120. The storage unit 129 transmits the generated power of the block 30C of the solar cell 30 to the control unit 140 via the control unit 120 in response to a request from the control unit 140 performed via the control unit 120.

  As illustrated in FIG. 9, the controller 22B further includes a generated power prediction unit 227 as compared to the first embodiment. Further, the controller 22B includes an initial remaining amount setting unit 224A instead of the initial remaining amount setting unit 224, as compared with the first embodiment.

  In response to a request from the initial remaining amount setting unit 224, the generated power prediction unit 227 predicts the power generated by the block 30C of the solar cell 30 in the time zone set by the time zone setting unit 221. The generated power is predicted as follows, for example.

  The generated power prediction unit 227 acquires the generated power of the block 30C of the solar cell 30 stored in the storage unit 129 via the control unit 220 and the control unit 120. The generated power prediction unit 227 predicts the power generated by the block 30C of the solar cell 30 in the time zone set by the time zone setting unit 221 based on the generated power of the block 30C of the solar cell 30 stored in the storage unit 129. To do.

  Specifically, the generated power prediction unit 227 is, for example, the same time zone as the time zone set by the time zone setting unit 221 and the same weather as that predicted for the time zone set by the time zone setting unit 221 Of the generated power at this time, the average value or the minimum value of the generated power on the day closest to the day when the power failure occurs is predicted as the generated power in the time zone set by the time zone setting unit 221. For example, the generated power prediction unit 227 acquires the weather predicted in the time zone set by the time zone setting unit 221 via the Internet. Note that the generated power prediction unit 227 has the same time zone as the time zone set by the time zone setting unit 221, and the time zone setting unit 221 determines the average value and the minimum value of the generated power in the time zone for the past several days. The generated power of the set time zone may be predicted, or the average value and the minimum value of the generated power in the time zone of the same day last year that is the same time zone as the time zone set by the time zone setting unit 221 The generated power of the time zone set by the time zone setting unit 221 may be predicted.

  When preparing for a sudden power failure, the generated power prediction unit 227, for example, the time when the time zone setting unit 221 sets the latest generated power among the current generated power, that is, the generated power stored in the storage unit 129, for example. Predicted as the power generated by the belt. When preparing for a sudden power failure, the generated power prediction unit 227 is the same time zone as the time zone set by the time zone setting unit 221 and is the minimum value of power consumption in the time zone for the past several days. May be predicted as the power consumption in the time zone set by the time zone setting unit 221, or in the same time zone as the time zone set by the time zone setting unit 221 and in the time zone of the same day last year May be predicted as the power consumption in the time zone set by the time zone setting unit 221.

  Note that when the generated power based on actual use is not stored in the storage unit 129, the generated power prediction unit 227 may use, for example, rated generated power.

  The initial remaining amount setting unit 224A is obtained by multiplying the power consumption (unit: kW) predicted by the power consumption prediction unit 223 and the time length (unit: h) of the time zone set by the time zone setting unit 221. The first electric energy (unit: kWh) is obtained. The first power amount is an amount of power that is expected to be consumed by the electric device 26 when a power failure occurs, and the power amount used when setting the initial remaining amount of the storage battery 143 in the first embodiment. The same. When a plurality of electrical devices 26 are used, the initial remaining amount setting unit 224A calculates the first power amount for each electrical device 26. The initial remaining amount setting unit 224A adds up the first electric energy obtained for each electric device 26 to be used.

  The initial remaining amount setting unit 224A is obtained by multiplying the generated power (unit: kW) predicted by the generated power prediction unit 227 and the time length (unit: h) of the time zone set by the time zone setting unit 221. A second power amount (unit: kWh) is obtained. The second power amount is the amount of power generated by the block 30C of the solar cell 30. Note that the second power amount may become zero depending on the time zone set by the time zone setting unit 221. For example, at night.

  The initial remaining amount setting unit 224A sets the third power amount obtained by subtracting the second power amount from the first power amount as the remaining amount of the storage battery 143. That is, in the present embodiment, the amount of power that is smaller than the remaining amount set in the first embodiment by the amount of power generated by the block 30C of the solar cell 30 is set as the remaining amount of the storage battery 143. When the third power amount becomes negative, the initial remaining amount setting unit 224A sets the remaining amount of the storage battery 143 to zero.

  The control unit 140 acquires the latest generated power among the generated power stored in the storage unit 129 via the control unit 120 when a power failure occurs. The control unit 140 acquires the latest power consumption among the power consumption stored in the repeater 18 via the control unit 120, the controller 22B, and the router 20 when a power failure occurs. The control unit 140 compares the acquired generated power and the consumed power, and changes the power source that supplies power to the electrical device 26 during a power failure according to the result. Specifically, when the generated power is larger than the consumed power, the generated power by the block 30 </ b> C of the solar cell 30 is supplied to the storage battery 143 and the electric device 26. When the generated power is less than or equal to the consumed power, the power generated by the block 30C of the solar cell 30 and the power stored in the storage battery 143 are supplied to the electrical device 26.

  Next, processing performed by the control unit of the power storage system 10A will be described with reference to a flowchart. The controller of the power storage system 10A includes a controller 220 included in the controller 22B, a controller 120 included in the power conditioner 12A, a controller 140 included in the storage battery box 14, and a controller 320 included in the power conditioner 32. Is done. The processing described below is executed by any of the control unit 220 included in the controller 22A, the control unit 120 included in the power conditioner 12A, the control unit 140 included in the storage battery box 14, and the control unit 320 included in the power conditioner 32. To do.

  With reference to FIG. 10, processing (normal processing) when no power failure has occurred will be described. In addition, about the same process as 1st Embodiment, the same step number as 1st Embodiment is attached | subjected and the detailed description is abbreviate | omitted.

  In the present embodiment, compared to the first embodiment, S12A is executed instead of S12, S14A is executed instead of S14, and S16C is executed instead of S16. Hereinafter, the processing of S12A, S14A, and S16C will be described.

[Processing of S12A]
In S12A, control unit 220 executes processing for setting the remaining amount of storage battery 143. The process of setting the remaining capacity of the storage battery 143 is as follows.

  First, the control unit 220 requests the initial remaining amount setting unit 224A to set the remaining amount of the storage battery 143.

  The initial remaining amount setting unit 224 acquires the electrical device 26 selected by the used device selection unit 222. The initial remaining amount setting unit 224 acquires the time zone set by the time zone setting unit 221. The initial remaining amount setting unit 224 provides the power consumption prediction unit 223 with the electrical device 26 selected by the used device selection unit 222 and the time zone set by the power failure time zone 221. The power consumption prediction unit 223 is based on the data provided from the initial remaining amount setting unit 224 (the electric device 26 selected by the used device selection unit 222 and the time zone set by the time zone setting unit 221). The data necessary for setting the remaining amount of the storage battery 143 is determined. When preparing for a planned power outage, for example, the power consumed in the past by the electric device 26 selected by the used device selection unit 222 and consumed in the same time zone as the time zone set by the time zone setting unit 221 is used. The data required for setting the remaining amount of the storage battery 143 is used. When preparing for a sudden power failure, for example, the power consumed by the electrical device 26 selected by the used device selection unit 222 is consumed in the past, and the latest power consumption is necessary to set the remaining amount of the storage battery 143. Data. The power consumption prediction unit 223 obtains data necessary for setting the remaining amount of the storage battery 143 from the repeater 18 via the router 20. Based on the acquired data, the power consumption prediction unit 223 predicts the power consumed by the electrical device 26 selected by the device selection unit 222 during the time zone set by the time zone setting unit 221. The power consumption prediction unit 223 provides the predicted power consumption to the initial remaining amount setting unit 224. The initial remaining amount setting unit 224 uses the device in the time zone set by the time zone setting unit 221 based on the power consumption predicted by the power consumption prediction unit 223 and the time length of the time zone set by the time zone setting unit 221. The first power amount consumed by the electrical device 26 selected by the selection unit 222 is obtained.

  The initial remaining amount setting unit 224A requests the generated power prediction unit 227 to predict the power generated by the block 30C of the solar cell 30 in the time zone set by the time zone setting unit 221. The initial remaining amount setting unit 224A provides the generated power prediction unit 227 with the time zone set by the time zone setting unit 221. The generated power prediction unit 227 generates data necessary for setting the remaining amount of the storage battery 143 based on the data provided from the initial remaining amount setting unit 224A (the time zone set by the power failure time zone 221). decide. When preparing for a planned power outage, the generated power prediction unit 227 is, for example, a weather that is predicted to be in the same time zone as the time zone set by the time zone setting unit 221 and in the time zone set by the time zone setting unit 221. Among the generated power at the same weather, the average value and the minimum value of the generated power on the day closest to the day when the power failure occurs are used as data necessary for setting the remaining amount of the storage battery 143. When preparing for a sudden power failure, the generated power prediction unit 227 sets the remaining power of the storage battery 143, for example, the current generated power, that is, the latest generated power among the generated power stored in the storage unit 129. Data necessary for this. The generated power prediction unit 227 acquires data necessary for setting the remaining capacity of the storage battery 143 from the storage unit 129 via the control unit 220 and the control unit 120. The generated power prediction unit 227 predicts the power generated by the block 30C of the solar cell 30 in the time zone set by the time zone setting unit 221 based on the acquired data. The generated power prediction unit 227 provides the predicted generated power to the initial remaining amount setting unit 224A. The initial remaining amount setting unit 224A is a solar cell in the time zone set by the time zone setting unit 221 based on the generated power predicted by the generated power prediction unit 227 and the time length of the time zone set by the time zone setting unit 221. The second electric energy generated by the 30 blocks 30C is obtained.

  The initial remaining amount setting unit 224A sets the third power amount obtained by subtracting the second power amount from the first power amount as the remaining amount of the storage battery 143. The initial remaining amount setting unit 224 provides the control unit 220 with the remaining amount (set remaining amount) set by the initial remaining amount setting unit 224. The control unit 220 transmits the provided set remaining amount to the control unit 140 via the control unit 120. The control unit 140 sets the received set remaining amount to the remaining amount (initial remaining amount) of the storage battery 143 necessary when a power failure occurs.

[Processing of S14A]
Controllers 120, 140, and 320 execute a process of charging storage battery 143 in S14A.

The process for charging the storage battery 143 is as follows.
(1) The control unit 140 supplies the electric power generated by the block 30C of the solar battery 30 and the electric power from the power system 24 to the electric device 26, and controls the operation of the storage battery box 14 so as to charge the storage battery 143. .
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) The control unit 140 transmits a signal indicating the operation performed by the storage battery box 14 to the control unit 320 via the control unit 120.
(4) Upon receiving the signal from the control unit 140, the control unit 120 supplies the electric power generated by the block 30C of the solar cell 30 and the power from the power system 24 to the electric device 26, and charges the storage battery 143. In addition, the operation of the power conditioner 12 is controlled.
(5) When receiving the signal from the control unit 140, the control unit 320 controls the operation of the power conditioner 32 so that the electric power generated by the block 30C of the solar cell 30 is supplied to the electric device 26 and the storage battery 143. .

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144B in each changeover switch 144. The control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. Further, in the changeover switch 127, the control unit 120 connects the switch 127C to the contact 127A. The control unit 320 turns on the protection relay 323 and the interconnection relay 324 and turns off the self-supporting relay 325. Thereby, the electric power generated by the blocks 30 </ b> A to 30 </ b> C of the solar battery 30 and the electric power from the electric power system 24 are supplied to the electric device 26 via the changeover switch 144 and the power consumption acquisition unit 16. In addition, the storage battery 143 is charged with the power generated by the blocks 30 </ b> A to 30 </ b> C of the solar battery 30 and the power from the power system 24. In addition, depending on the time zone when a power failure occurs, the power generated by the blocks 30A to 30C of the solar cell 30 may be zero.

[Processing of S16C]
The control units 120, 140, and 320 execute processing for supplying power to the electrical device 26 in S16C.

There are the following three modes for supplying electric power to the electric device 26. The control units 120, 140, and 320 may execute any process.
(1) A mode of supplying power stored in the storage battery 143, power from the power system 24, and power generated by the blocks 30A to 30C of the solar battery 30 to the electric device 26 (2) power stored in the storage battery 143 and a block of the solar battery 30 Aspect of supplying power generated by 30C to the electrical device 26 (3) Aspect of supplying power from the power system 24 and power generated by the blocks 30A to 30C of the solar cell 30 to the electrical device 26

The process performed in the aspect which supplies to the electric equipment 26 the electric power which the storage battery 143 stores, the electric power from the electric power grid | system 24, and the electric power which the blocks 30A-30C of the solar cell 30 generate | occur | produce is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so that the power stored in the storage battery 143, the power from the power system 24, and the power generated by the blocks 30A to 30C of the solar battery 30 are supplied to the electrical device 26. To do.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) The control unit 140 transmits a signal indicating the operation performed by the storage battery box 14 to the control unit 320 via the control unit 120.
(4) When receiving the signal from the control unit 140, the control unit 120 supplies the electric device 26 with the power stored in the storage battery 143, the power from the power system 24, and the power generated by the blocks 30A to 30C of the solar cell 30. Thus, the operation of the power conditioner 12 is controlled.
(5) When receiving the signal from the control unit 140, the control unit 320 controls the operation of the power conditioner 32 so that the electric power generated by the block 30C of the solar cell 30 is supplied to the electric device 26.

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144B in each changeover switch 144. The control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. Further, in the changeover switch 127, the control unit 120 connects the switch 127C to the contact 127A. The control unit 320 turns on the protection relay 323 and the interconnection relay 324 and turns off the self-supporting relay 325. Thereby, the electric power of the storage battery 143 passes through the breaker 142, the bidirectional DC / DC converter 122, the bidirectional DC / AC converter 121, the protection relay 123, the interconnection relay 124, the changeover switch 144, and the power consumption acquisition unit 16. And supplied to the electric device 26. The electric power generated by the blocks 30A and 30B of the solar cell 30 is supplied via the DC / DC converter 321, the DC / AC converter 322, the protection relay 323, the interconnection relay 324, the changeover switch 144, and the power consumption acquisition unit 16. The electric device 26 is supplied. The electric power generated by the block 30 </ b> C of the solar cell 30 passes through the changeover switch 127, the DC / DC converter 321, the DC / AC converter 322, the protection relay 323, the interconnection relay 324, the changeover switch 144, and the power consumption acquisition unit 16. And supplied to the electric device 26. The power from the power system 24 is supplied to the electrical device 26 via the changeover switch 144 and the power consumption acquisition unit 16. In this aspect, when the power generated by the blocks 30 </ b> A to 30 </ b> C of the solar cell 30 is greater than the power from the power system 24, the power from the power system 24 is not supplied to the electrical device 26.

The process performed in the aspect which supplies the electric device 26 with the electric power which the storage battery 143 stores and the electric power which the block 30C of the solar cell 30 generates is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so that the electric power generated by the block 30C of the solar battery 30 and the electric power stored in the storage battery 143 are supplied to the electric device 26.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) When the control unit 120 receives the signal from the control unit 140, the operation of the power conditioner 12 is performed so that the electric power generated by the block 30C of the solar cell 30 and the electric power stored in the storage battery 143 are supplied to the electric device 26. To control.

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144A in each changeover switch 144. The control unit 120 turns off the protection relay 123 and the interconnection relay 124 and turns on the self-supporting relay 125. Further, in the changeover switch 127, the control unit 120 connects the switch 127C to the contact 127B. Thereby, the electric power of the storage battery 143 is supplied to the electric device 26 via the breaker 142, the bidirectional DC / DC converter 122, the bidirectional DC / AC converter 121, the self-supporting relay 125, the changeover switch 144, and the power consumption acquisition unit 16. To be supplied. Further, the electric power generated by the block 30C of the solar cell 30 is transmitted through the changeover switch 127, the DC / DC converter 126, the bidirectional DC / AC converter 121, the self-supporting relay 125, the changeover switch 144, and the power consumption acquisition unit 16. , Supplied to the electrical equipment 26. Further, the path for supplying the electric power from the power system 24 to the electric device 26 and the path for supplying the electric power generated by the blocks 30A and 30B of the solar cell 30 to the electric device 26 are blocked.

The process performed in the aspect which supplies the electric device 26 with the electric power from the electric power grid | system 24 and the electric power which the blocks 30A-30C of the solar cell 30 generate | occur | produce is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so as to supply the electric device 26 with the electric power from the electric power system 24 and the electric power generated by the blocks 30A to 30C of the solar cell 30.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) The control unit 140 transmits a signal indicating the operation performed by the storage battery box 14 to the control unit 320 via the control unit 120.
(4) When receiving the signal from the control unit 140, the control unit 120 supplies the power from the power system 24 and the power generated by the blocks 30 </ b> A to 30 </ b> C of the solar battery 30 to the electric device 26. 12 operations are controlled.
(5) When receiving the signal from the control unit 140, the control unit 320 controls the operation of the power conditioner 32 so that the electric power generated by the blocks 30A to 30C of the solar cell 30 is supplied to the electric device 26.

  Specifically, the control unit 140 turns off the breaker 142 and connects the switch 144C to the contact 144B in each changeover switch 144. The control unit 120 turns on the protection relay 123 and the interconnection relay 124 and turns off the self-supporting relay 125. Further, in the changeover switch 127, the control unit 120 connects the switch 127C to the contact 127A. The control unit 320 turns on the protection relay 323 and the interconnection relay 324 and turns off the self-supporting relay 325. Thereby, the electric power generated by the blocks 30 </ b> A and 30 </ b> B of the solar battery 30 is supplied to the DC / DC converter 321, the DC / AC converter 322, the protection relay 323, the interconnection relay 324, the changeover switch 144, and the power consumption acquisition unit 16. Via the electric device 26. The electric power generated by the block 30 </ b> C of the solar cell 30 passes through the changeover switch 127, the DC / DC converter 321, the DC / AC converter 322, the protection relay 323, the interconnection relay 324, the changeover switch 144, and the power consumption acquisition unit 16. And supplied to the electric device 26. The power from the power system 24 is supplied to the electrical device 26 via the changeover switch 144 and the power consumption acquisition unit 16. The path for supplying the electric power stored in the storage battery 143 to the electrical device 26 is blocked. In this aspect, when the power generated by the blocks 30 </ b> A to 30 </ b> C of the solar cell 30 is greater than the power from the power system 24, the power from the power system 24 is not supplied to the electrical device 26.

  Next, processing when a power failure occurs (processing at the time of a power failure) will be described with reference to FIG. In addition, about the same process as 1st Embodiment, the same step number as 1st Embodiment is attached | subjected and the detailed description is abbreviate | omitted.

  In the present embodiment, one of S101A and S101B is executed instead of S101 as compared to the first embodiment. Further, S105 and S106 are executed before any of S101A and S101B is executed.

  In S105, the control unit 140 compares the power generated by the block 30C of the solar cell 30 at this time with the power consumption of the electric device 26. Specifically, the control unit 140 acquires the latest generated power out of the generated power stored in the storage unit 129 via the control unit 120 and also uses the latest power consumption stored in the repeater 18. The power is acquired via the control unit 120, the controller 22B, and the router 20. The controller 140 checks whether or not the acquired generated power is larger than the power consumption.

  When the generated power is larger than the power consumption (S105: YES), the control unit 140 determines whether or not the storage battery 143 is full based on the remaining amount detected by the remaining amount detection unit 141 in S106. To do. When the remaining amount of the storage battery 143 is not full (S106: YES), the control unit 140 supplies the power generated by the block 30C of the solar battery 30 to the storage battery 143 and the electric device 26 in S101A. In addition, about the process performed in the aspect which supplies the electric power which the electric power which the storage battery 143 accumulate | stores, and the electric power which the block 30C of the solar cell 30 produces | generates to the electric equipment 26 is demonstrated when explaining the process of S16C, the details The detailed explanation is omitted. When the process of S101A is completed, the processes after S102 are executed. In the present embodiment, when the process of S102 is completed, the processes after S105 are repeatedly executed.

  When the generated power is less than or equal to the consumed power (S105: NO) and when the storage battery 143 is full (S106: YES), the control unit 140 blocks the power stored in the storage battery 143 and the solar battery 30 in S101B. The power of 30 C is supplied to the electric device 26.

The process performed in the aspect which supplies the electric device 26 with the electric power which the storage battery 143 stores, and the electric power of the block 30C of the solar cell 30 is as follows.
(1) The control unit 140 controls the operation of the storage battery box 14 so as to supply the electric device 26 with the power stored in the storage battery 143 and the power generated by the block 30C of the solar battery 30.
(2) The control unit 140 transmits a signal indicating an operation performed by the storage battery box 14 to the control unit 120.
(3) When the control unit 120 receives a signal from the control unit 140, the control unit 120 operates the power conditioner 12 so as to supply the electric device 26 with the power stored in the storage battery 143 and the power generated by the block 30C of the solar battery 30. To control.

  Specifically, the control unit 140 turns on the breaker 142 and connects the switch 144C to the contact 144A in each changeover switch 144. The control unit 120 turns off the protection relay 123 and the interconnection relay 124 and turns on the self-supporting relay 125. Further, in the changeover switch 127, the control unit 120 connects the switch 127C to the contact 127B. Thereby, the electric power generated by the block 30C of the solar battery 30 is changed over to the changeover switch 127, the DC / DC converter 321, the DC / AC converter 322, the protection relay 323, the interconnection relay 324, the changeover switch 144, and the power consumption acquisition unit. 16 to the electrical device 26. The power of the storage battery 143 is supplied to the electrical device 26 via the breaker 142, the bidirectional DC / DC converter 122, the bidirectional DC / AC converter 121, the self-supporting relay 125, the changeover switch 144, and the power consumption acquisition unit 16. The The path for supplying the electric power generated by the blocks 30 </ b> A and 30 </ b> B of the solar battery 30 to the electric device 26 and the path for supplying the electric power from the electric power system 24 to the electric device 26 are blocked.

  Since such a power storage system 10A includes the solar battery 30, the amount of power that can be supplied when a power failure occurs increases. Therefore, for example, it is possible to cope with a case where the power failure time becomes long or the power consumption increases.

  In the power storage system 10A, the remaining amount of the storage battery 143 is set in consideration of the power generated by the block 30C of the solar battery 30. Therefore, compared with the first embodiment, the remaining amount of the storage battery 143 can be set small. That is, more electric power stored in the storage battery 143 can be used than in the first embodiment.

[Application 1 of the second embodiment]
The initial remaining amount setting unit 224A may not consider the power generated by the block 30C of the solar cell 30 when setting the remaining amount of the storage battery 143. In this case, the same remaining amount as that in the first embodiment is set. As a result, the amount of power that can be consumed during a power failure increases.

[Application Example 2 of Second Embodiment]
As described in Application Example 1 of the first embodiment, in the time zone when the electricity rate is low, the power generated by the solar cell 30 and the power from the power system 24 are used without using the power of the storage battery 143. May be.

[Application 3 of the second embodiment]
As described in the application example 2 of the first embodiment, when the power failure occurs, the electric equipment 26 to be used may be reduced according to the remaining amount of the storage battery 143.

  As mentioned above, although embodiment of this invention has been explained in full detail, these are illustrations to the last and this invention is not limited at all by the above-mentioned embodiment.

  For example, when a power failure actually occurs, the electric device 26 to be used may be confirmed with the user. In this case, the user can use the electrical device 26 that is really necessary in the time zone when the power failure occurs. In particular, when the number of electric devices 26 to be used is reduced, the usage time of the electric devices 26 that are desired to be used preferentially can be increased.

10: power storage system, 120: control unit, 140: control unit, 141: remaining amount detection unit, 143: storage battery, 16: power consumption acquisition unit, 220: control unit, 221: time zone setting unit, 222: device selection Unit, 223: power consumption prediction unit, 224: initial remaining amount setting unit, 225: reference remaining amount setting unit, 226: priority order setting unit, 227: generated power prediction unit, 26: electrical equipment, 30: solar cell (power generation apparatus)

Claims (5)

A storage battery,
A time zone setting section for setting a time zone in which a power failure occurs,
A use device selection unit for selecting an electrical device to which the storage battery supplies power in the time zone set by the time zone setting unit;
A power consumption prediction unit that predicts power consumed by the electrical device selected by the device-use setting unit in the time zone set by the time zone setting unit;
The first amount of power obtained by multiplying the power predicted by the power consumption prediction unit and the time length of the time zone set by the time zone setting unit is used for the storage battery required when a power failure occurs. An initial remaining capacity setting section for setting the remaining capacity;
A remaining amount detection unit for detecting the remaining amount of the storage battery;
A controller that controls charging and discharging of the storage battery,
The control unit is configured such that when no power failure occurs, the storage battery is detected when the remaining amount of the storage battery detected by the remaining amount detection unit is greater than the remaining amount of the storage battery set by the initial remaining amount setting unit. , And charging the storage battery when the remaining amount of the storage battery detected by the remaining amount detection unit is less than the remaining amount of the storage battery set by the initial remaining amount setting unit. The power storage system according to claim 1,
A power storage system, further comprising: a power generation device that supplies power to the electrical device selected by the used device selection unit during the time zone set by the time zone setting unit. The power storage system according to claim 2,
A power generation prediction unit for predicting the power generated by the power generation device in the time zone set by the time zone setting unit;
The initial remaining amount setting unit obtains a second power amount obtained by multiplying the power predicted by the generated power prediction unit and the time length of the time zone set by the time zone setting unit from the first power amount. A power storage system that sets a third power amount obtained by subtraction to a remaining amount of the storage battery that is required when a power failure occurs. The power storage system according to any one of claims 1 to 3,
A reference remaining amount setting unit for setting a remaining amount less than the remaining amount of the storage battery set by the initial remaining amount setting unit;
A priority setting unit for setting a priority when using the electrical device in the time zone set by the time zone setting unit;
When a power failure occurs, if the remaining amount of the storage battery detected by the remaining amount detection unit is less than the remaining amount set by the reference remaining amount setting unit, the priority setting unit sets the A stop device selection unit that selects the electrical device that stops power supply from the storage battery in order of decreasing priority in the priority order; and
The said control part is an electrical storage system which stops the electric power supply to the said electric equipment which the said stop apparatus selection part selected. The power storage system according to any one of claims 1 to 4,
The time zone setting unit sets a time zone in which a power failure occurs every time a predetermined time elapses,
Each time the time zone setting unit sets the time zone, the power consumption prediction unit consumes power consumed by the electrical device selected by the device used setting unit during the time zone set by the time zone setting unit. Predict,
The initial remaining amount setting unit multiplies the power predicted by the power consumption prediction unit by the time length of the time zone set by the time zone setting unit each time the time zone setting unit sets the time zone. The first power amount obtained in this way is set to the remaining amount of the storage battery that is required when a power failure occurs.

Images