JP2020074668A - Management system, management method, control device, and storage battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a management system, a management method, a control device, and a storage battery device capable of appropriately controlling a device.
SOLUTION: The EMS 200 stores at least one of a message indicating the rated output of the storage battery 141 and a message indicating the number of times of charging / discharging of the storage battery 141 when the storage battery device 140 is disconnected from the grid. It is received from the device 140.
[Selection diagram]

Description

  The present invention relates to a management system, a management method, a control device, and a storage battery device having a storage battery device that charges and discharges electric power using a storage battery and a control device that communicates with the storage battery device.

  In recent years, a power management system including a plurality of devices and a control device that controls the plurality of devices has been proposed (for example, Patent Document 1). The plurality of devices are, for example, home electric appliances such as air conditioners and lighting devices, and distributed power sources such as solar cells, storage batteries, and fuel power generators. Controller, for example, HEMS (Home Energy Management System), SEMS (Store Energy Management System), BEMS (Building Energy Management System), FEMS (Factory Energy Management System), referred to as CEMS (Cluster / Community Energy Management System) To be done.

  In order to popularize the above-mentioned management system, it is effective to use a common message format between a plurality of devices and a control device, and such a common message format has been attempted.

JP, 2010-128810, A

  The commonization of the message formats described above is just the beginning, and various studies are needed on the message formats for appropriately controlling the devices.

  Then, this invention is made in order to solve the subject mentioned above, and an object of this invention is to provide the management system, the management method, the control apparatus, and the storage battery apparatus which enable it to control a device appropriately. ..

  The management system according to the first feature includes a power storage device including a storage battery that stores electric power, and a control device that communicates with the power storage device. The control device, at least one of the message indicating the rated output of the storage battery and the message indicating the number of times the storage battery has been charged and discharged in a self-sustaining operation state in which the power storage device is disconnected from the grid, displays at least one of the messages. To receive from.

  In the first feature, the control device is configured to disconnect the power storage device from the grid prior to the communication of the message indicating the rated output of the storage battery in the self-sustained operation state in which the power storage device is disconnected from the grid. A message indicating the presence or absence of the function of transmitting a message indicating the rated output of the storage battery in the operating state is received from the power storage device.

  In the first feature, the control device receives, from the power storage device, a message indicating whether or not a function of transmitting a message indicating the number of times of charging / discharging of the storage battery is transmitted prior to communication of a message indicating the number of times of charging / discharging of the storage battery. To do.

  The management method according to the second feature is a method used in a management system including a power storage device including a storage battery that stores electric power and a control device that communicates with the power storage device. The management method, from the power storage device to the control device, of the message indicating the rated output of the storage battery and the message indicating the number of charge and discharge of the storage battery in the self-sustained operation state in which the power storage device is disconnected from the grid, The step of transmitting at least one of the messages is provided.

  The control device according to the third feature communicates with a power storage device including a storage battery that stores electric power. The control device, from the power storage device, at least one of the message indicating the rated output of the storage battery and the message indicating the number of times the storage battery is charged and discharged in the self-sustained operation state in which the power storage device is disconnected from the grid. To receive.

  The power storage device according to the fourth feature includes a storage battery that stores electric power. The power storage device, to the control device that communicates with the power storage device, a message indicating the rated output of the storage battery and a message indicating the number of times the storage battery has been charged and discharged in the self-sustained operation state in which the power storage device is disconnected from the grid. A communication unit for transmitting at least one of the messages to the control device is provided.

  According to the present invention, it is possible to provide a management system, a management method, a control device, and a storage battery device that can appropriately control a device.

FIG. 1 is a diagram showing an energy management system 100 according to the first embodiment. FIG. 2 is a diagram showing the customer 10 according to the first embodiment. FIG. 3 is a diagram showing the fuel cell device 150 according to the first embodiment. FIG. 4 is a diagram showing a network configuration according to the first embodiment. FIG. 5 is a diagram showing the EMS 200 according to the first embodiment. FIG. 6 is a diagram showing a message format according to the first embodiment. FIG. 7 is a diagram showing a message format according to the first embodiment. FIG. 8 is a diagram showing a message format according to the first embodiment. FIG. 9 is a sequence diagram showing the management method according to the first embodiment.

  Hereinafter, a management system according to an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are designated by the same or similar reference numerals.

  However, it should be noted that the drawings are schematic and ratios of respective dimensions and the like are different from actual ones. Therefore, specific dimensions should be determined in consideration of the following description. Further, it is needless to say that the drawings include portions in which dimensional relationships and ratios are different from each other.

[Outline of Embodiment]
The management system according to the embodiment includes a power storage device including a storage battery that stores electric power, and a control device that communicates with the power storage device. The control device, at least one of the message indicating the rated output of the storage battery and the message indicating the number of times the storage battery is charged and discharged in a self-sustaining operation state in which the power storage device is disconnected from the grid, displays the message. To receive from.

  In the embodiment, the control device can appropriately control other devices (load, fuel cell device) in the self-sustained operation state by receiving the message indicating the rated output of the storage battery in the self-sustained operation state from the power storage device. it can. Alternatively, the control device can determine the degree of deterioration of the storage battery by receiving a message indicating the number of times the storage battery has been charged and discharged from the power storage device.

[First Embodiment]
(Energy management system)
The energy management system according to the first embodiment will be described below. FIG. 1 is a diagram showing an energy management system 100 according to the first embodiment.

  As illustrated in FIG. 1, the energy management system 100 includes a customer 10, a CEMS 20, a substation 30, a smart server 40, and a power station 50. The customer 10, the CEMS 20, the substation 30, and the smart server 40 are connected by the network 60.

  The customer 10 has, for example, a power generation device and a power storage device. The power generation device is a device that outputs electric power using fuel gas, such as a fuel cell. The power storage device is a device that stores electric power, such as a secondary battery.

  The customer 10 may be a detached house or a condominium such as a condominium. Alternatively, the customer 10 may be a store such as a convenience store or a supermarket, a commercial facility such as a building, or a factory.

  In the first embodiment, a plurality of customers 10 configure a customer group 10A and a customer group 10B. The customer group 10A and the customer group 10B are classified by, for example, a geographical area.

  The CEMS 20 controls the interconnection between the plurality of customers 10 and the electric power system. Note that the CEMS 20 is also referred to as a CEMS (Cluster / Community Energy Management System) in order to manage a plurality of customers 10. Specifically, the CEMS 20 disconnects between the plurality of consumers 10 and the power system during a power failure or the like. On the other hand, the CEMS 20 interconnects the plurality of customers 10 and the power system at the time of power recovery.

  In the first embodiment, CEMS 20A and CEMS 20B are provided. The CEMS 20A controls, for example, the interconnection between the customers 10 included in the customer group 10A and the power system. The CEMS 20B controls, for example, the interconnection between the customers 10 included in the customer group 10B and the power system.

  The substation 30 supplies electric power to the plurality of consumers 10 via the distribution line 31. Specifically, the substation 30 reduces the voltage supplied from the power station 50.

  In the first embodiment, a substation 30A and a substation 30B are provided. The substation 30A supplies electric power to the customers 10 included in the customer group 10A via a distribution line 31A, for example. The substation 30B supplies electric power to the customers 10 included in the customer group 10B via a distribution line 31B, for example.

  The smart server 40 manages a plurality of CEMSs 20 (here, CEMS 20A and CEMS 20B). Further, the smart server 40 manages a plurality of substations 30 (here, the substation 30A and the substation 30B). In other words, the smart server 40 comprehensively manages the customers 10 included in the customer group 10A and the customer group 10B. The smart server 40 has, for example, a function of balancing the power to be supplied to the customer group 10A and the power to be supplied to the customer group 10B.

  The power plant 50 generates power using thermal power, wind power, hydraulic power, nuclear power, or the like. The power plant 50 supplies electric power to the plurality of substations 30 (here, the substation 30A and the substation 30B) via the power transmission line 51.

  The network 60 is connected to each device via a signal line. The network 60 is, for example, the Internet, a wide area network, a narrow area network, a mobile phone network, or the like.

(Customer)
The customer according to the first embodiment will be described below. FIG. 2 is a diagram showing details of the customer 10 according to the first embodiment.

  As shown in FIG. 2, the customer 10 includes a distribution board 110, a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, a hot water storage device 160, and an EMS 200.

  In the first embodiment, the customer 10 has an ammeter 180, an ammeter 181, and an ammeter 182.

  The ammeter 180 is used for load follow-up control of the fuel cell device 150. The ammeter 180 is located on the power line connecting each device (for example, the storage battery device 140 and the fuel cell device 150) to the grid, downstream of the connection point between the storage battery device 140 and the power line (on the side away from the grid), and It is provided upstream (closer to the system) than the connection point between the fuel cell device 150 and the power line. It goes without saying that the ammeter 180 is provided upstream (closer to the system) than the connection point between the load 120 and the power line.

  The ammeter 181 is used to confirm whether or not there is a power flow (reverse power flow) from the storage battery device 140 to the grid. The ammeter 181 is provided on the power line connecting each device (for example, the storage battery device 140) and the system, upstream of the connection point between the storage battery device 140 and the power line (on the side close to the system).

  The ammeter 182 is used to measure the electric power generated by the PV device 130. The ammeter 182 is provided closer to the PV device 130 than the connection point between the PV device 130 and the power line that connects each device (for example, the PV device 130) to the system.

  It should be noted that in the first embodiment, each device is connected to the power line in the order of the PV device 130, the storage battery device 140, the fuel cell device 150, and the load 120 when viewed from the order close to the grid.

  The distribution board 110 is connected to the distribution line 31 (system). The distribution board 110 is connected to the load 120, the PV device 130, the storage battery device 140, and the fuel cell device 150 via the power line.

  The load 120 is a device that consumes electric power supplied through the power line. For example, the load 120 includes devices such as a refrigerator, a freezer, lighting, and an air conditioner.

  The PV device 130 has a PV 131 and a PCS 132. The PV 131 is an example of a power generation device, and is a solar power generation device that generates power according to the reception of sunlight. The PV 131 outputs the generated DC power. The power generation amount of the PV 131 changes according to the amount of solar radiation applied to the PV 131. The PCS 132 is a device (Power Conditioning System) that converts DC power output from the PV 131 into AC power. The PCS 132 outputs AC power to the distribution board 110 via the power line.

  In the first embodiment, the PV device 130 may include a pyranometer that measures the amount of solar radiation applied to the PV 131.

  The PV device 130 is controlled by the MPPT (Maximum Power Point Tracking) method. Specifically, the PV apparatus 130 optimizes the operating point of the PV 131 (point determined by operating point voltage value and power value, or point determined by operating point voltage value and current value).

  The storage battery device 140 has a storage battery 141 and a PCS 142. The storage battery 141 is a device that stores electric power. The PCS 142 is a device (Power Conditioning System) that converts AC power supplied from the distribution line 31 (system) into DC power. The PCS 142 also converts the DC power output from the storage battery 141 into AC power.

  Here, the storage battery device 140 operates according to any one of a plurality of operation modes in which the standards for charging and discharging the storage battery 141 are different.

  The plurality of operation modes include an operation mode in a system interconnection state and an operation mode in an independent operation state. The system interconnection state is a state in which the storage battery device 140 and the system are arranged in parallel. On the other hand, the self-sustained operation state is a state in which the storage battery device 140 and the grid are disconnected. As an example of the self-sustaining operation state, for example, a state where a power failure occurs can be considered.

  The operation mode in the grid interconnection state is (a) an operation mode in which charging / discharging of the storage battery 141 is controlled so as to prioritize power sale (reverse power flow) of electric power generated by the PV device 130 (solar power purchase priority mode). ), (B) an operation mode (solar light charging mode) for controlling charging and discharging of the storage battery 141 so that the storage battery 141 is charged with the electric power generated by the PV device 130, and (c) the power supplied from the grid is constant. Supply from the grid during an operation mode (peak cut mode) for controlling charging / discharging of the storage battery 141 so as not to exceed the value, (d) during a period when the unit price of the power supplied from the grid is lower than a threshold value (for example, at night). The operation mode in which the charging / discharging of the storage battery 141 is controlled so that the storage battery 141 is charged with the stored power (midnight power utilization mode), (e) the operation of forcibly storing the power in the storage battery 141. Mode (forced power storage mode), and the like (f) operating mode that forcibly discharges the power stored in the battery 141 (forced discharge mode).

  Here, in (a) the solar power purchase priority mode and (b) the solar charge mode, the storage battery device 140 monitors the current measured by the ammeter 182, and according to the power generation amount of the PV device 130. It is necessary to control the charging / discharging of the storage battery 141. Since the power generation amount of the PV device 130 changes from moment to moment, these operation modes are preferably controlled by the storage battery device 140.

  Similarly, in the (c) peak cut mode, the storage battery device 140 monitors the current measured by the ammeter 181 and the ammeter 182, and charges and discharges the storage battery 141 according to the amount of power supplied from the grid. Need to control. The amount of electric power supplied from the grid is a value obtained by subtracting the electric power measured by the ammeter 182 from the electric power measured by the ammeter 181. Since the power generation amount of the PV device 130 and the power consumption of the load 120 change from moment to moment, this operation mode is preferably controlled by the storage battery device 140.

  In the first embodiment, (a) solar power purchase priority mode, (b) solar charge mode, and (c) peak cut mode are examples of operation modes in which the PV 131 other than the storage battery 141 and the storage battery 141 cooperate with each other.

  The operation mode in the self-sustaining operation state includes (g) an operation mode for accumulating the electric power generated by the PV device 130 (hereinafter, self-sustaining power storage mode), (h) a load 120 connected to a self-supporting outlet provided in the storage battery device 140. Operation mode for supplying electric power to the battery (hereinafter referred to as a self-sustaining supply mode), (i) while accumulating the electric power generated by the PV device 130, supplying the electric power to the load 120 connected to the self-supporting outlet provided in the storage battery device 140. The operation mode (hereinafter, referred to as an independent power storage supply mode) and the like.

  Further, as control common to all operation modes, the storage battery device 140 monitors the current measured by the ammeter 181 so that the flow of electric power (reverse power flow) from the storage battery device 140 to the grid does not occur. It is necessary to control charging / discharging of the storage battery 141. Since the power consumption of the load 120 changes from moment to moment, these operation modes are preferably controlled by the storage battery device 140.

  In the first embodiment, a message that specifies one of a plurality of operation modes is defined between the EMS 200 and the storage battery device 140. Here, the message that specifies one of the plurality of operation modes is the time to start the operation in the specified operation mode, the time to end the operation in the specified operation mode, and the time to operate in the specified operation mode. It is preferable to include. For example, in the mode of (d), it is necessary to specify time such as when to start charging at midnight and when to start discharging at daytime.

  The message specifying one of the plurality of operation modes includes information indicating whether the specified operation mode is the operation mode in the grid interconnection state or the specified operation mode is the operation mode in the independent operation state. Preferably.

  For example, the storage battery device 140 receives, from the EMS 200, a message designating one of the plurality of operation modes. The storage battery device 140 operates in any of a plurality of operation modes according to the message received from the EMS 200. Alternatively, the storage battery device 140 transmits a message designating one of the plurality of operation modes to the EMS 200. The EMS 200 acquires in which of the plurality of operation modes the EMS 200 is operating, based on the message received from the storage battery device 140.

  Further, storage battery device 140 transmits a message indicating whether or not it has a function of handling a message designating one of the plurality of operation modes to EMS 200, prior to the communication of the message designating one of the plurality of operation modes.

  In the first embodiment, the storage battery device 140 transmits a message indicating the rated output of the storage battery 141 to the EMS 200. The message indicating the rated output of the storage battery 141 includes at least information indicating the rated output of the storage battery 141 in the self-sustained operation state. The message indicating the rated output of the storage battery 141 may include information indicating the rated output of the storage battery 141 in the system interconnection state. Here, when the EMS 200 controls other devices (for example, the fuel cell device 150 and the load 120), the rated output of the storage battery 141 in the self-sustaining operation state is important information for the EMS 200.

  Further, the storage battery device 140 transmits a message indicating whether or not it has a function of transmitting a message indicating the rated output of the storage battery 141 to the EMS 200 prior to the communication of the message indicating the rated output of the storage battery 141.

  In the first embodiment, the storage battery device 140 transmits to the EMS 200 a message indicating the number of times the storage battery 141 has been charged and discharged. The message indicating the number of times of charging / discharging the storage battery 141 includes at least the number of times of charging / discharging the storage battery 141 in the current state. The message indicating the number of times of charging / discharging the storage battery 141 may include the maximum number of times of charging / discharging the storage battery 141. Here, in determining the degree of deterioration of the storage battery 141, the number of times of charging and discharging the storage battery 141 is important information for the EMS 200.

  Further, the storage battery device 140 transmits to the EMS 200 a message indicating whether or not it has a function of transmitting a message indicating the number of times of charging / discharging of the storage battery 141, prior to the communication of the message indicating the number of times of charging / discharging of the storage battery 141.

  In the first embodiment, the PCS 142 constitutes, for example, a communication unit that receives the above-described message from the EMS 200 or transmits the message to the EMS 200. Alternatively, the PCS 142 configures a control unit that controls charging and discharging of the storage battery 141 according to the operation mode of the storage battery 141, for example. However, the communication unit and the control unit may be provided on a control board provided separately from the PCS 142.

  The fuel cell device 150 has a fuel cell 151 and a PCS 152. The fuel cell 151 is an example of a power generation device, and is a device that generates electric power using fuel (gas). The PCS 152 is a device (Power Conditioning System) that converts DC power output from the fuel cell 151 into AC power.

  The fuel cell device 150 operates under load following control. Specifically, the fuel cell device 150 controls the fuel cell 151 so that the electric power output from the fuel cell 151 becomes the target electric power for the load following control. In other words, the fuel cell device 150 controls the power output from the fuel cell 151 so that the current value detected by the ammeter 180 becomes the target power reception.

  The hot water storage device 160 is a device for generating hot water using fuel (gas) or maintaining the water temperature. Specifically, hot water storage apparatus 160 has a hot water storage tank, and the water supplied from the hot water storage tank is supplied by heat generated by combustion of fuel (gas) or exhaust heat generated by operation (power generation) of fuel cell 151. warm. Specifically, the hot water storage device 160 warms the water supplied from the hot water storage tank and returns the warmed hot water to the hot water storage tank.

  It should be noted that in the embodiment, the fuel cell device 150 and the hot water storage device 160 form a hot water supply unit 170 (hot water supply system).

  The EMS 200 is an apparatus (Energy Management System) that controls the PV apparatus 130, the storage battery apparatus 140, the fuel cell apparatus 150, and the hot water storage apparatus 160. Specifically, the EMS 200 is connected to the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160 via a signal line, and the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device. Control 160. Further, the EMS 200 controls the power consumption of the load 120 by controlling the operation mode of the load 120.

  Further, the EMS 200 is connected to various servers via the network 60. The various servers store information (hereinafter referred to as energy charge information) such as a purchase unit price of electric power supplied from the grid, a sale unit price of electric power supplied from the grid, and a purchase unit price of fuel gas.

  Alternatively, the various servers store, for example, information for predicting the power consumption of the load 120 (hereinafter, energy consumption prediction information). The energy consumption prediction information may be generated, for example, based on the actual value of the power consumption of the load 120 in the past. Alternatively, the energy consumption prediction information may be a model of power consumption of the load 120.

  Alternatively, the various servers store, for example, information for predicting the power generation amount of the PV 131 (hereinafter, PV power generation amount prediction information). The PV power generation prediction information may be a predicted value of the amount of solar radiation applied to the PV 131. Alternatively, the PV power generation prediction information may be weather forecasts, seasons, sunshine hours, and the like.

(Fuel cell device)
The fuel cell device according to the first embodiment will be described below. FIG. 3 is a diagram showing the fuel cell device 150 according to the first embodiment.

  As shown in FIG. 3, the fuel cell device 150 includes a fuel cell 151, a PCS 152, a blower 153, a desulfurizer 154, an ignition heater 155, and a control board 156.

  The fuel cell 151 is a device that outputs electric power using fuel gas, as described above. Specifically, the fuel cell 151 has a reformer 151A and a cell stack 151B.

  The reformer 151A generates a reformed gas from the fuel gas from which the odorant has been removed by the desulfurizer 154 described later. The reformed gas is a gas composed of hydrogen and carbon monoxide.

  The cell stack 151B generates electricity by a chemical reaction between air (oxygen) supplied from a blower 153 described later and the reformed gas. Specifically, the cell stack 151B has a structure in which a plurality of cells are stacked. Each cell has a structure in which an electrolyte is sandwiched between a fuel electrode and an air electrode. The reformed gas (hydrogen) is supplied to the fuel electrode, and the air (oxygen) is supplied to the air electrode. A chemical reaction between the reformed gas (hydrogen) and air (oxygen) occurs in the electrolyte to generate electric power (DC electric power) and heat.

  As described above, the PCS 152 is a device that converts the DC power output from the fuel cell 151 into AC power.

  The blower 153 supplies air to the fuel cell 151 (cell stack 151B). The blower 153 is composed of, for example, a fan.

  The desulfurizer 154 removes the odorant contained in the fuel gas supplied from the outside. The fuel gas may be city gas or propane gas.

  The ignition heater 155 is a heater that ignites the fuel that has not chemically reacted in the cell stack 151B (hereinafter, unreacted fuel) and maintains the temperature of the cell stack 151B at a high temperature. That is, the ignition heater 155 ignites the unreacted fuel leaking from the openings of the cells forming the cell stack 151B. It should be noted that the ignition heater 155 may ignite the unreacted fuel when the unreacted fuel is not combusted (for example, when the fuel cell device 150 is started). Then, once ignited, the unreacted fuel that overflows little by little from the cell stack 151B continues to burn, and the temperature of the cell stack 151B is maintained at a high temperature.

  The control board 156 is a board on which a circuit for controlling the fuel cell 151, the PCS 152, the blower 153, the desulfurizer 154, the ignition heater 155, and the control board 156 is mounted.

  In the first embodiment, the cell stack 151B is an example of a power generation unit that generates power by a chemical reaction. The reformer 151A, the blower 153, the desulfurizer 154, the ignition heater 155, and the control board 156 are an example of an auxiliary device that assists the operation of the cell stack 151B. Moreover, you may handle a part of PCS152 as an auxiliary device.

(Network configuration)
The network configuration according to the first embodiment will be described below. FIG. 4 is a diagram showing a network configuration according to the first embodiment.

  As shown in FIG. 5, the network includes a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, a hot water storage device 160, an EMS 200, and a user terminal 300. The user terminal 300 includes a user terminal 310 and a user terminal 320.

  The user terminal 310 is connected to the EMS 200, and is information for visualizing energy consumption of each device (load 120, PV device 130, storage battery device 140, fuel cell device 150, hot water storage device 160) (hereinafter, visualization information). Is displayed by a web browser. In such a case, the EMS 200 generates visualization information in a format such as HTML and transmits the generated visualization information to the user terminal 310. The connection format between the user terminal 310 and the EMS 200 may be wired or wireless.

  The user terminal 320 is connected to the EMS 200 and displays visualization information by an application. In such a case, the EMS 200 transmits the information indicating the energy consumption of each device to the user terminal 320. The application of the user terminal 320 generates visualization information based on the information received from the EMS 200 and displays the generated visualization information. The connection format between the user terminal 320 and the EMS 200 may be wired or wireless.

  As described above, in the first embodiment, the fuel cell device 150 and the hot water storage device 160 form the hot water supply unit 170. Therefore, hot water storage apparatus 160 may not have the function of communicating with EMS 200. In such a case, the fuel cell device 150 acts on behalf of the hot water storage device 160 to communicate a message regarding the hot water storage device 160 with the EMS 200.

  In the first embodiment, the communication between the EMS 200 and each device (the load 120, the PV device 130, the storage battery device 140, the fuel cell device 150, the hot water storage device 160) is performed according to a predetermined protocol. Examples of the predetermined protocol include a protocol called "ECHONET Lite" or "ECHONET". However, the embodiment is not limited to this, and the predetermined protocol may be a protocol other than “ECHONET Lite” and “ECHONET”.

(Structure of EMS)
The EMS according to the first embodiment will be described below. FIG. 5 is a block diagram showing the EMS 200 according to the first embodiment.

  As shown in FIG. 5, the EMS 200 includes a reception unit 210, a transmission unit 220, and a control unit 230.

  The reception unit 210 receives various signals from devices connected via signal lines. For example, the receiving unit 210 may receive information indicating the power generation amount of the PV 131 from the PV device 130. The receiving unit 210 may receive information indicating the amount of electricity stored in the storage battery 141 from the storage battery device 140. The receiving unit 210 may receive information indicating the power generation amount of the fuel cell 151 from the fuel cell device 150. Receiving unit 210 may receive information indicating the amount of hot water stored in hot water storage device 160 from hot water storage device 160.

  In the first embodiment, the receiving unit 210 may receive energy charge information, energy consumption prediction information, and PV power generation amount prediction information from various servers via the network 60. However, the energy charge information, the energy consumption prediction information, and the PV power generation amount prediction information may be stored in the EMS 200 in advance.

  In the first embodiment, the receiving unit 210 receives from the storage battery device 140 (for example, the PCS 142) a message that specifies one of a plurality of operation modes that have different charging / discharging criteria for the storage battery 141. As a result, the reception unit 210 acquires in which of the plurality of operation modes the storage battery device 140 is operating. Alternatively, the reception unit 210 receives a message indicating the rated output of the storage battery 141 from the storage battery device 140 (for example, PCS 142). Alternatively, the receiving unit 210 receives a message indicating the cumulative number of times of charge / discharge of the storage battery 141 from the storage battery device 140 (for example, PCS 142). In other words, the PCS 142 of the storage battery device 140 constitutes a communication unit that transmits the above-mentioned message.

  In the first embodiment, the reception unit 210 transmits a message indicating whether or not a function of handling a message designating one of the plurality of operation modes is available, prior to the communication of the message designating any one of the plurality of operation modes. Received from 140. Alternatively, the reception unit 210 receives, from the storage battery device 140, a message indicating the presence or absence of the function of transmitting the message indicating the rated output of the storage battery 141, prior to the communication of the message indicating the rated output of the storage battery 141. Alternatively, or before receiving the message indicating the number of times of charging / discharging the storage battery 141, the receiving unit 210 receives from the storage battery device 140 a message indicating whether or not there is a function of transmitting a message indicating the number of times of charging / discharging the storage battery 141.

  The transmitter 220 transmits various signals to devices connected via signal lines. For example, the transmission unit 220 transmits a signal for controlling the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160 to each device. The transmitter 220 transmits a control signal for controlling the load 120 to the load 120.

  In the first embodiment, the transmission unit 220 transmits a message designating one of a plurality of operation modes to the storage battery device 140 (for example, PCS 142). As a result, the transmission unit 220 instructs the storage battery device 140 about the operation mode of the storage battery 141. Alternatively, the transmission unit 220 transmits a message requesting the rated output of the storage battery 141 to the storage battery device 140. Alternatively, the transmission unit 220 transmits a message requesting the number of times of charging / discharging the storage battery 141 to the storage battery device 140.

  In the first embodiment, the transmission unit 220 requests a message indicating whether or not there is a function of handling a message that specifies one of a plurality of operation modes, prior to the communication of a message that specifies one of a plurality of operation modes. The message is transmitted to the storage battery device 140. Alternatively, transmitting unit 220 transmits a message requesting a message indicating the presence or absence of the function of transmitting the message indicating the rated output of storage battery 141 to storage battery device 140, prior to the communication of the message indicating the rated output of storage battery 141. Alternatively, or before the communication of the message indicating the charging / discharging number of the storage battery 141, the transmitting unit 220 requests the storage battery device 140 for a message requesting the presence / absence of the function of transmitting the message indicating the charging / discharging number of the storage battery 141. Send to.

  The control unit 230 controls the load 120, the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160.

(Message format)
The message format according to the first embodiment will be described below. 6 to 8 are diagrams showing an example of the message format of the first embodiment.

  Firstly, the message designating any one of the plurality of operation modes having different charging / discharging criteria of the storage battery 141 has a format shown in FIG. 6, for example. As shown in FIG. 6, the message has a message type field and a driving mode field.

  The message type field indicates the type of message, and in the first embodiment, indicates that the message includes the operation mode.

  The operation mode field indicates the operation mode of the storage battery 141. As described above, the operation modes include (a) solar power purchase priority mode, (b) solar charge mode, (c) peak cut mode, (d) midnight power utilization mode, (e) forced power storage mode, ( f) forced discharge mode, (g) self-sustained storage mode, (h) self-sustained supply mode, (i) self-sustained storage supply mode, and the like.

  Secondly, the message indicating the rated output of the storage battery 141 has, for example, the format shown in FIG. 7. As shown in FIG. 7, the message has a message type field and a rated output field.

  The message type field indicates the type of the message, and in the first embodiment, indicates that the message includes the rated output.

  The field of rated output shows the rated output of the storage battery 141. The rated output field includes at least information indicating the rated output of the storage battery 141 in the self-sustained operation state. The rated output field may include information indicating the rated output of the storage battery 141 in the system interconnection state.

  Thirdly, the message indicating the number of times of charging / discharging the storage battery 141 has, for example, the format shown in FIG. As shown in FIG. 8, the message has a message type field and a charge / discharge frequency field.

  The message type field indicates the type of the message, and in the first embodiment, the message indicates that the message includes the charge / discharge count.

  The rated output field indicates the number of times the storage battery 141 has been charged and discharged. The field of the number of times of charging and discharging includes at least the number of times of charging and discharging of the storage battery 141 in the current state. The field of the number of times of charge and discharge may include the maximum number of times of charge and discharge of the storage battery 141.

(Management method)
The management method according to the first embodiment will be described below. FIG. 9 is a sequence diagram showing the management method of the first embodiment.

  As shown in FIG. 9, in step 10, the EMS 200 transmits to the storage battery device 140 a message (code group request) requesting a code group corresponding to the storage battery device 140. The code group request is an example of a message requesting a message indicating whether or not there is a function of handling a message that specifies one of a plurality of operation modes having different charging / discharging criteria of the storage battery 141. Alternatively, the code group request is an example of a message requesting a message indicating the presence or absence of the function of transmitting the message indicating the rated output of the storage battery 141. Alternatively, the code group request is an example of a message requesting a message indicating the presence / absence of the function of transmitting a message indicating the number of times of charging / discharging the storage battery 141.

  In step 20, the storage battery device 140 transmits a message (code group response) indicating a code group corresponding to the storage battery device 140 to the EMS 200. The code group response is an example of a message indicating whether or not there is a function of handling a message that specifies one of a plurality of operation modes having different charging / discharging criteria of the storage battery 141. Alternatively, the code group response is an example of a message indicating whether or not there is a function of transmitting a message indicating the rated output of the storage battery 141. Alternatively, the code request is an example of a message indicating whether or not there is a function of transmitting a message indicating the number of times of charging / discharging the storage battery 141 (cumulative number of charging / discharging).

  In step 30, the EMS 200 transmits to the storage battery device 140 a message designating one of a plurality of operation modes having different charging / discharging criteria of the storage battery 141. When the storage battery device 140 receives the message, the storage battery device 140 determines the specified mode from the message and switches its state to the specified mode. Thereby, the EMS 200 instructs the storage battery device 140 about the operation mode of the storage battery 141. Further, the storage battery device 140 may reply to the EMS 200 that it has accepted the mode switching instruction or that the mode switching has been completed.

  After a while, in step 40, the EMS 200 transmits to the storage battery device 140 a message (operation mode request) requesting notification of the operation mode of the storage battery 141.

  In step 50, the storage battery device 140 transmits, to the EMS 200, a message indicating the operation mode of the storage battery 141 (operation mode response) as a response to the request.

  In step 60, the EMS 200 transmits a message (rated output request) requesting notification of the rated output of the storage battery 141 to the storage battery device 140.

  In step 70, the storage battery device 140 transmits a message (rated output response) indicating the rated output of the storage battery 141 to the EMS 200. Here, the rated output response is configured to include the output information corresponding to the state of whether the system is currently interconnected or independent, even if it includes both the rated output and the output during self-sustaining operation. You may have.

  In step 80, the EMS 200 transmits to the storage battery device 140 a message (charge / discharge count request) requesting notification of the charge / discharge count of the storage battery 141.

  In step 90, the storage battery device 140 transmits to the EMS 200 a message (charge / discharge count response) indicating the cumulative number of times of charging / discharging of the storage battery 141.

  As described above, in the first embodiment, the charging / discharging control of the storage battery 141 according to the operation mode of the storage battery 141 is left to the storage battery device 140, and the charging / discharging reference of the storage battery 141 is different among the plurality of operation modes. A message that specifies whether or not is defined. As a result, the EMS 200 can appropriately control the storage battery device 140 without being affected by the communication delay between the EMS 200 and the storage battery device 140. Further, the EMS 200 can grasp the amount of power generation of the storage battery device 140 and the like, and can appropriately control other devices (load, fuel cell device, etc.).

  In the first embodiment, the EMS 200 appropriately controls the other devices (load, fuel cell device) in the self-sustained operation state by receiving the message indicating the rated output of the storage battery 141 in the self-sustained operation state from the storage battery device 140. can do. Alternatively, the EMS 200 can determine the degree of deterioration of the storage battery 141 by receiving a message indicating the number of times of charging and discharging the storage battery 141 from the storage battery device 140. Specifically, in the case of a battery having a relatively strong relationship between the number of charge / discharge cycles and the degree of deterioration, such as a lithium ion battery, it can be calculated to some extent.

[Other Embodiments]
Although the present invention has been described by the above-described embodiments, it should not be understood that the description and drawings forming a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operation techniques will be apparent to those skilled in the art.

  For example, it is assumed that the engine is operated in the idling mode during a power outage, but if there is power demand in the load, not only the fuel cell 151 itself supplies power to auxiliary devices, but also the fuel cell device 150 is connected to the fuel cell device 150. Alternatively, the self-sustaining operation mode may be used in which the output of the fuel cell 151 is increased so that the output power corresponding to the demand of the load is obtained. That is, although the self-sustained operation mode and the idling mode are different in whether or not to externally output the generated power, they are common in that the power supply to the auxiliary device is covered by the self-generated power during the system power failure. For this reason, the two modes in which power is supplied to the auxiliary device by self-power generation during a system power failure may be referred to as a self-sufficiency mode for convenience.

  Further, in the temperature maintenance mode, the power consumption of the auxiliary devices is covered by the power supply from the grid, but the power may be supplied from the output of the PV device 130, the storage battery device 140, or the like.

  The EMS 200 may be a HEMS (Home Energy Management System), a SEMS (Store Energy Management System), a BEMS (Building Energy Management), or a BEMS (BUILDING MANAGEMENT FEATURE). It may be.

  In the embodiment, the customer 10 has a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, and a hot water storage device 160. However, the consumer 10 may have at least the storage battery device 140.

  In the embodiment, (a) solar power purchase priority mode, (b) solar charge mode, and (c) peak cut mode are illustrated as the operation modes in which the storage battery 141 cooperates with devices other than the storage battery 141. However, the embodiment is not limited to this. For example, the operation mode of the storage battery 141 may include an operation mode in which the load 120, the fuel cell device 150 or the hot water storage device 160 and the storage battery 141 cooperate with each other.

  Although not particularly mentioned in the embodiment, the timing for initializing the storage battery device 140, the timing for recovering from the power failure, the timing for turning on the power of the storage battery device 140, the timing for turning on the power of the EMS 200, the setting of the storage battery device 140. It is preferable that the code group request and the code group response are transmitted and received at the timing when it is necessary to confirm

  Although not particularly mentioned in the embodiment, it is preferable that a message indicating the status of the storage battery 141 is defined between the EMS 200 and the storage battery device 140. The message indicating the operation mode of the storage battery 141 and the message indicating the number of times of charging / discharging the storage battery 141 are examples of the message indicating the status of the storage battery 141.

  Although not particularly mentioned in the embodiment, it is preferable that a message indicating the specifications of the storage battery 141 is defined between the EMS 200 and the storage battery device 140. The message indicating the output rating of the storage battery 141 is an example of a message indicating the specifications of the storage battery 141.

  Although not particularly mentioned in the embodiment, the storage battery device 140 may autonomously send various messages to the EMS 200 instead of the request from the EMS 200. For example, the storage battery device 140 transmits various messages to the EMS 200 when a predetermined condition is satisfied.

  Although not particularly mentioned in the embodiment, the storage battery device 140 sends a message indicating the specifications of the storage battery 141 (for example, a message indicating the output rating of the storage battery 141) and a message indicating the status of the storage battery 141 together with the code group response. It may be transmitted to the EMS 200.

  10 ... Consumer, 20 ... CEMS, 30 ... Substation, 31 ... Distribution line, 40 ... Smart server, 50 ... Power station, 51 ... Power line, 60 ... Network, 100 ... Energy management system, 110 ... Distribution board, 120 ... Load, 130 ... PV device, 131 ... PV, 132 ... PCS, 140 ... Storage battery device, 141 ... Storage battery, 142 ... PCS, 150 ... Fuel cell device, 151 ... Fuel cell, 151A ... Reformer, 151B ... Cell Stack, 152 ... PCS, 153 ... Blower, 154 ... Desulfurizer, 155 ... Ignition heater, 156 ... Control board, 160 ... Hot water storage device, 170 ... Hot water supply device, 180, 181, 182 ... Ammeter, 200 ... EMS, 210 ... Receiving unit, 220 ... Transmitting unit, 230 ... Control unit, 300, 310, 320 ... User terminal

Claims (4)

A storage battery device provided in the customer,
With a control device,
The storage battery device and the control device transmits and receives a message according to a predetermined protocol,
The control device includes, as the message, a first message indicating a first rated output during grid interconnection of the storage battery device and a second message indicating a second rated output during independent operation of the storage battery device. A management system characterized by being receivable in a form that can be identified from each device. A storage battery device provided in a consumer and a management method used in a management system including a control device,
The storage battery device and the control device has a step of transmitting and receiving a message in accordance with a predetermined protocol determined in advance,
The control device includes, as the message, a first message indicating a first rated output during grid interconnection of the storage battery device and a second message indicating a second rated output during independent operation of the storage battery device. A management method characterized by being receivable in such a manner as to be distinguishable from each device. A control device for communicating with a storage battery device provided in a consumer,
A receiving unit for receiving a message according to a predetermined protocol from the storage battery device,
The receiving unit uses, as the message, a first message indicating a first rated output when the storage battery device is connected to a power grid and a second message indicating a second rated output when the storage battery device is operating independently. A control device, wherein the control device is receivable in a manner that can be identified from each device. A storage battery device installed in a customer,
A transmission unit for transmitting a message according to a predetermined protocol set in advance to the control device,
The transmission unit controls, as the message, a first message indicating a first rated output during grid interconnection of the storage battery device and a second message indicating a second rated output during independent operation of the storage battery device. A storage battery device, characterized in that the devices are capable of transmitting in a form that allows them to be identified.

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