JP2014054112A - Device, method, and program for monitoring electricity - Google Patents

Abstract

An object of the present invention is to prevent power consumption from exceeding contract power and to suppress degradation of comfort as much as possible.
Current power consumption is acquired at predetermined time intervals, and power consumption from a monitoring start time to the current time is measured. Furthermore, the power used in a predetermined period from the measured power consumption to the end of the predetermined period is calculated as predicted power. Then, when the predicted power and the contract power are compared and it is determined that the predicted power exceeds the contract power, the power consumption of the devices to be controlled is integrated in order according to the control order, and the integrated value exceeds the excess power. Sometimes, the control target device that is the target of integration is selected. And the suppression control of the electric power used with respect to the control object apparatus selected here is performed. In addition, when the predicted power does not exceed the contract power, the control power of the control target device that is subject to suppression control is the sum of the power consumption is less than or equal to the difference between the contract power and the predicted power. Release the suppression control for the target device.
[Selection] Figure 1

Description

  Embodiments described herein relate generally to a power monitoring apparatus, a method, and a program for controlling electric power used by electrical equipment.

  In recent years, energy saving has been demanded, and power consumption has been reduced in buildings and factories that are large consumers of electric power. There is a tendency to reduce the contract power as the power consumption is reduced. However, by reducing the contract power, the possibility that the power consumption exceeds the contract power increases at the peak of the power usage, such as in summer. For this reason, it is necessary to constantly monitor the power used, and to suppress the power used by electric devices such as air conditioners and lighting devices that are currently in use if the power used may exceed the contract power.

  Conventionally, when there is a possibility that the power used may exceed the contract power, the monitoring device cuts off the power supply to the electric device to be controlled as a control for suppressing the power used for the electric device ( On / off control), the power used does not exceed the contract power (control of power consumption). In addition, in such control, when an air conditioning device is included in the control target, the user may be forced to have an uncomfortable air conditioning environment. A technique for maintaining and controlling has been proposed.

JP 2000-184590 A

  However, in the conventional technology, some electric devices are no longer used regardless of this suppression control when using lighting or air conditioning to stop or change the setting to reduce the power consumption. There is a problem that even if possible power is generated, the suppression control is continued.

  The problem to be solved by the present invention is to provide a power monitoring apparatus, method and program for preventing power consumption from exceeding contract power and minimizing deterioration in comfort due to control of power consumption. Is to provide.

  The power monitoring apparatus according to the embodiment manages setting data in which a control target device and its power consumption are associated with each other for each control order when the control of power consumption is performed. In addition, the current power consumption is acquired at predetermined time intervals. Then, the amount of power used from the monitoring start time to the current time in a predetermined cycle is measured. Furthermore, the power used in a predetermined period from the measured power consumption to the end of the predetermined period is calculated as predicted power. Then, the predicted power and the contract power are compared. If it is determined by this comparison that the predicted power exceeds the contracted power, the power consumption of the controlled devices is accumulated in order according to the control order, and when the accumulated value exceeds the excess power, it is subject to accumulation. Select the control target device. And the suppression control of the electric power used with respect to the control object apparatus selected here is performed. Furthermore, after the control of power consumption control, if it is determined in the previous comparison that the predicted power does not exceed the contract power, the total power consumption of the control target devices selected as targets for control suppression is the contract power. The control for reducing the power consumption is canceled for the control target device whose control order is later, which is equal to or less than the difference between the power consumption and the predicted power.

FIG. 1 is a block diagram illustrating a configuration of a monitoring system according to an embodiment. FIG. 2 is a diagram illustrating setting data. FIG. 3 is a block diagram illustrating a functional configuration of the control target device selection unit. FIG. 4 is a flowchart for explaining the operation of the control device (monitoring device). FIG. 5 is a block diagram illustrating a hardware configuration of the operation device and the control device.

  FIG. 1 is a block diagram illustrating a configuration of a monitoring system according to an embodiment. The monitoring system shown in the figure includes an operation device 100 and a control device (monitoring device) 200.

(Operating device)
The operating device 100 is a computer such as a PC that includes a contract power setting unit 101, a control target device setting unit 102, a priority setting unit 103, a power consumption setting unit 104, and a control mode setting unit 105. The operating device 100 is an operator terminal and is provided in a monitoring room or the like.

  Each of the setting units is a functional unit of the operation device 100 that sets setting data input by an operator's operation in a control device 200 (described later in detail). Each of the following data set as setting data 202 by each setting unit is stored in the storage device of the control device 200 (FIG. 2). The contents of the setting data 202 set in the control device 200 by each setting unit can be arbitrarily changed / deleted as necessary by each unit.

  The contract power setting unit 101 sets contract power determined with the power company for the control device 200.

  The control target device setting unit 102 is a control target that is a target of power usage suppression control (hereinafter referred to as suppression control) to be described later for each priority set by the following priority setting unit 103 with respect to the control device 200. A device (for example, an air conditioner or a lighting device) is set. Specifically, an identification code or the like corresponding to the device to be controlled is set as the setting content (in the following description, the identification code is used as an example). In addition, the control target device setting unit 102 sets a plurality of control target devices as one group for each priority set by the priority setting unit 103 described below, or sets the control target device as a group for each area in the facility. It is also possible to do. In these cases, an identification code for specifying a control target device included in the group is set. When the control target device has a plurality of operation modes / operation states, an identification code for specifying the operation mode / operation state of the control target device is set. Hereinafter, not only an individual control target device but also a group including a plurality of control target devices is referred to as a control target device including its operation mode / operation state.

  The priority setting unit 103 sets a priority for each control target device with respect to the control device 200. Here, the priority defines the order in which the suppression control is performed on the control target device. In the case of the suppression control, the suppression control is actually performed in order from the control target device with the lower priority. It becomes the object of.

  The power consumption setting unit 104 sets the power consumption of each control target device set for each priority for the control device 200. In addition, when the control target device has a plurality of operation modes / operation states and the suppression control is performed by changing the operation mode / operation state, the power consumption in the operation mode / operation state is set. To do. Also, when multiple control target devices and their operation modes / operation states are grouped, or when grouped by area, the operation mode / operation state of each control target device in the group for each group Set the power consumption of the corresponding group.

  The control mode setting unit 105 sets the normal mode / lighting priority mode / air conditioning priority mode / fixed mode as the control mode for the suppression control with respect to the control device 200. In this embodiment, the normal mode is a mode for performing suppression control to be described later. In the lighting priority mode, priority is given to adjustment for lighting for each area with respect to the above priority, and if there is a possibility of excess power even if all the lights are in a shut-off state, control for suppressing air conditioning is performed. To do. The reverse is true when the air conditioning priority mode is set. In the fixed mode, the suppression control content determined for the fixed mode is performed. For example, when the excess power with respect to the contract power is below a predetermined level, control such as “temperature setting of the air conditioner ○ degree / blind closing / lighting on” is performed. Then, when the excess power increases by a predetermined amount, it is possible to set so that control such as “temperature setting of air conditioning ○ degree / blind half open / partial lighting off” is performed. It should be noted that the fixed mode suppression control content as described above can be set as fixed mode setting information using each unit of the controller device 100.

(Control device)
The control device 200 includes a control target device management unit 201, a current power acquisition unit 203, a used power amount measurement unit 204, a predicted power calculation unit 205, a power comparison unit 206, a control target device selection unit 207, an alarm notification unit 208, and a control target. This is an industrial computer provided with a device control unit 209 and a suppression state management unit 210. The control device 200 is provided on the facility side where the control target device is installed. When the power used in a fixed cycle (hereinafter referred to as the demand monitoring cycle) is likely to exceed the contract power, each of the above parts will calculate the amount of power that may be exceeded (excess power) from the total power used. In order to reduce, it is a functional part of the control apparatus 200 which performs suppression control with respect to the control object apparatus with a low priority. The demand monitoring cycle is a cycle (for example, 30) in which the amount of power used is measured by the power company in order to obtain the maximum demand power (demand value) used in the electricity bill calculation of the power company, which is also related to the contract power. Min).

  The control target device management unit 201 sets the priority, the control target device (identification code), and the power consumption of the control target device, which are set and input by the operation device 100 and stored in the storage device of the control device 200. Manage as part. Specifically, for each priority, the control target device and its power consumption are managed in a table format, for example. Further, contract power, control mode, and fixed mode setting information are managed as another part of the setting data 202.

  The current power acquisition unit 203 acquires the current power consumption (kW) of all monitored electrical devices including the control target device every minute. In addition, although this embodiment demonstrates as what acquires the present electric power every minute, it acquires with a time interval shorter than a demand monitoring period (for example, 30 minutes).

  The power consumption measuring unit 204 measures the power consumption (kWh) from the monitoring start time to the current time from the current power consumption (current power) collected by the current power acquisition unit 203 every minute. Here, the electric power used every minute is multiplied by 1/60 to obtain a total.

  The predicted power calculation unit 205 uses the power consumption in this demand monitoring period from the power consumption measured by the power consumption measuring unit 204 to the end of the demand monitoring period (described here as 30 minutes) as the predicted power. Is calculated (predicted). Specifically, when the time interval from the monitoring start time to the current time is x (minutes) and the power consumption from the monitoring start time measured by the power consumption measuring unit 204 to the current time is y (kWh), Since y × (30 / x) is the power consumption (predicted value) in the demand monitoring period (30 minutes), the predicted power is calculated as y × (30 / x) × 2. The predicted power calculation unit 205 obtains the predicted power from the measurement result of the used power amount measuring unit 204 as described above, but uses the other method to predict the used power (predicted power) in the demand monitoring cycle. May be.

  The power comparison unit 206 compares the predicted power predicted by the predicted power calculation unit 205 with the set contract power. Then, as a result of the comparison, the excess power (difference between predicted power and contract power) is given to the control target device selection unit 207.

  The control target device selection unit 207 compares the predicted power and the contract power with the power comparison unit 206, and as a result, if the predicted power is larger than the contract power, the power that may exceed the contract power (excess power) The control target device to be suppressed and controlled to reduce the power consumption from the power used is selected (details will be described later).

  When the predicted power is larger than the contract power in the comparison, the alarm notification unit 208 gives an alarm when there is no control target device capable of reducing the power used for the power that may exceed the contract power. Control to issue by voice or display.

  The control target device control unit 209 performs suppression control on the control target device selected by the control target device selection unit 207. In the present embodiment, the power supply to the selected control target device is cut off, or the operation mode / operation state is changed to reduce the power consumption. Specifically, the control target device control unit 209 shuts off the supply power and adjusts the air volume and illuminance to the air conditioner and the lighting device if the predicted power may exceed the contract power within the demand monitoring cycle. Suppression control is performed so as to reduce the excess power consumption (by weakening). On the other hand, regardless of this suppression control, the power consumption may be reduced for another reason, for example, when the conference is ended, the electricity or air conditioning in the conference room is turned off, or all the lights are turned off during the lunch break. In such a case, when there is no risk that the predicted power exceeds the contract power, the control target device control unit 209 determines whether the control target device that is the target of the suppression control has the highest priority,・ Returning lighting, adjusting air flow and illuminance (intensifying), and returning control.

  The suppression state management unit 210 stores, as the state at the time of suppression of the control target device controlled by the control target device control unit 209, the power consumption measured until that time and the predicted power at the end of the demand monitoring cycle. Store and manage in device. This is because, when the monitoring device becomes abnormal, if the power consumption measured up to that point and the predicted power at the end of the demand monitoring cycle are lost, immediately after starting the control device 200 normally, Since the suppression control of the control target device is canceled and the power used may exceed the contract power, the control is stored so that the suppression control before the restart can be reproduced.

  Next, paying attention to the control target device selection unit 207 that selects a control target device for power that may exceed the contract power, the function of the control target device selection unit 207 will be described with reference to FIG. FIG. 3 is a functional block diagram of the control target device selection unit 207 and related processing units.

  As shown in the figure, the control target device selection unit 207 receives the excess power (difference between predicted power and contract power) from the power comparison unit 206, while the control target device selection unit 207 receives the control target from the control target device management unit 201 in the order of lower priority. Acquire the power consumption of each device (identification code) and control target device, integrate the value (power consumption), obtain the integrated power consumption value of the control target device in order, and calculate this integrated power consumption and excess power. The process which compares is performed. And if the excess power is greater than the integrated value of the power consumption of all the control target devices, the power of the power excess cannot be reduced even if all the control target devices are suppressed and controlled. Requests 208 to issue an alarm. On the other hand, in the comparison of the integrated value of power consumption and the excess power, when the integrated value of power consumption of the control target device becomes larger than the excess power, control target devices (sequentially acquired from the control target device management unit 201 ( (Identification code) is notified to the control target device control unit 209. In this way, the control target device selection unit 207 selects a control target device that needs to be subjected to suppression control in order to reduce the amount of power that may exceed the contract power from the power used.

  Next, the overall operation of the control device will be described with reference to FIG. FIG. 4 is a flowchart for explaining the operation of the control device.

  As shown in the figure, first, the current power acquisition unit 203 acquires the current power consumption (current power) (kW) of all monitored electrical devices including the control target device (step S101).

  Then, the power consumption measuring unit 204 measures the power consumption from the demand monitoring start time to the current time from the current power acquired by the current power acquisition unit 203 as described above (step S102).

  The predicted power calculation unit 205 calculates the power consumption (predicted power) at the end of the demand monitoring cycle from the power consumption from the demand monitoring start time to the current time measured by the power consumption measuring unit 204 as described above ( Step S103).

  Next, the power comparison unit 206 compares the predicted power calculated by the predicted power calculation unit 205 with the contract power (step S104).

  Here, when the contract power is smaller than the predicted power (contract power <predicted power), the control target device selection unit 207 may exceed the contract power in the normal mode as described above with reference to FIG. A control target device that needs to be subjected to suppression control in order to reduce a certain amount of power (excess power) from the power used is selected (step S105). In the lighting priority mode / air conditioning priority mode, the control target device is further selected as the lighting priority / air conditioning priority with respect to the priority. In the fixed mode, the control target device that is the target of the suppression control according to the excess power is selected from the fixed mode setting information.

  At this time, if a control target device for the power that may be exceeded cannot be secured (No in step S106), the alarm notification unit 208 controls to issue an alarm by voice or display as an alarm notification to the administrator. (Step S109).

  On the other hand, if it is possible to secure a control target device for the power that may be exceeded (Yes in Step S106), the control target device control unit 209 performs suppression control on the control target device selected in Step S105 (Step S106). S107). Specifically, an instruction to cut off the supplied power or to change the operation mode / operation state is sent directly or via another external device to the control target device selected as the target of the suppression control.

  Note that the suppression control in the present embodiment is not limited to the interruption of the supply power to the control target device selected as the target of the suppression control, but the illumination is the illuminance, and the air volume or the air conditioning mode ( By switching between cooling, heating, air blowing, and automatic), it is possible to reduce the power consumption of the entire electrical equipment in the building, for example, rather than suppressing power consumption extremely for each area or device. To do. Therefore, the priority of the suppression control such as priority is determined in consideration of not impairing comfort. In the present embodiment, control target devices such as air conditioning and lighting are assumed to support switching control of operation modes and the like from external devices.

  Subsequently, following execution of the suppression control by the control target device control unit 209, the suppression state management unit 210 uses the power consumption measured up to that point and the predicted power at the end of the demand monitoring cycle as suppression state data 211. Recording is performed (step S108).

  When an abnormality occurs in the control device 200 and the device is restarted, the control target device control unit 209 is based on the suppression state data 211 recorded and held in the storage device by the suppression state management unit 210. Resume suppression control before occurrence of abnormality. As a result, when the control device 200 becomes abnormal, if it is within the same demand monitoring period as when the abnormality occurred, even if the predicted power exceeds the contract power, the use of the contract power due to the resumed suppression control Excessive power can be avoided.

  After the process of step S108, the process returns to step S101, and the processes after step S101 are executed every minute.

  If the contract power is larger than the predicted power in the comparison between the contract power and the predicted power in step S104 (contract power> predicted power), it is determined at that time whether suppression control is being executed (step S110). .

  At this time, if the suppression control is not being executed (No in step S110), the process returns to step S101. On the other hand, if the suppression control is being executed (Yes in step S110), the return control described above is executed (step S111).

  As described above, the control device 200 of the present embodiment operates. After the demand monitoring cycle, the next demand monitoring start time is immediately after that, and the above series of processing is repeated.

  As described above, in the present embodiment, when power that can be used within the demand monitoring cycle (predicted power) may exceed the contract power, in order to reduce the power that may exceed, The suppression control is executed on the control target devices in the order of lower priority (normal mode). Alternatively, the suppression control is executed in the above-described illumination priority mode / air conditioning priority mode / fixed mode. In addition to cutting off the power supply, the power consumption is reduced by lighting and air conditioning modes. As a result, it is possible to reduce the power used within the range of contract power without extremely impairing the comfort in the building where the suppression control is performed. In addition, even if the control device 200 becomes abnormal, the control target device is kept in a suppressed state, so that it is possible to perform control so as not to exceed the contract power.

(Hardware configuration of operation device and control device)
Here, FIG. 5 shows hardware configurations of the operation device 100 and the control device 200. The operation device 100 and the control device 200 have, as their hardware configuration, a ROM 12 storing an initial program such as a boot program, and a process in which processing procedures for realizing the functions of the OS (Operating System) and the above-described units are described. The HDD 13 which is a storage device storing various data such as programs and the setting data 202 described above, the CPU 11 which executes processing for realizing the functions of the above-described units in accordance with the OS and the processing program, and various types of processing necessary for the CPU 11 A RAM 14 that temporarily stores data, an input / output I / F 15 that inputs / outputs data to / from the external device, and a bus 10 that connects each unit are provided.

  The processing program is provided by being recorded in a computer-readable recording medium such as a CD-ROM, a floppy (registered trademark) disk (FD), or a DVD as an installable or executable file. Alternatively, the program may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network.

  As mentioned above, although embodiment of this invention was described, the said embodiment was shown as an example and is not intending limiting the range of invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. Further, this embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 bus 11 CPU
12 ROM
13 HDD
14 RAM
15 Input / output I / F
DESCRIPTION OF SYMBOLS 100 Operation apparatus 101 Contract power setting part 102 Control object apparatus setting part 103 Priority setting part 104 Power consumption setting part 105 Control mode setting part 200 Control apparatus (monitoring apparatus)
201 Control target device management unit 202 Setting data 203 Current power acquisition unit 204 Used power amount measurement unit 205 Predictive power calculation unit 206 Power comparison unit 207 Control target device selection unit 208 Alarm notification unit 209 Control target device control unit 210 Status management during suppression Part 211 Suppression state data

Claims (10)

Control target device management means for managing setting data in which a control target device and its power consumption are associated with each other in order of control when suppressing control of power used;
Current power acquisition means for acquiring current power consumption at predetermined time intervals;
A power consumption measuring means for measuring the power consumption from the monitoring start time to the current time in a predetermined cycle;
Predicted power calculation means for calculating the power used in the predetermined period from the measured power consumption to the end of the predetermined period as predicted power;
Power comparison means for comparing the predicted power and contract power;
When it is determined by the power comparison means that the predicted power exceeds the contract power, the power consumption of the devices to be controlled is sequentially integrated according to the control order, and when the integrated value exceeds the excess power, Control target device selection means for selecting the control target device that is the target of the integration;
Device control means for performing suppression control of power consumption for the selected control target device,
The device control unit is selected by the control target device selection unit when the power comparison unit determines that the predicted power does not exceed the contracted power after the power control by the device control unit is controlled. A power monitoring device that cancels the suppression control of power used for control target devices whose control order is later, in which the total power consumption of the control target devices is equal to or less than the difference between the contract power and the predicted power .   The control target device is defined not only as an individual control target device but also as an operation mode or an operation state of an individual or grouped control target device and each individual or grouped control target device. The power monitoring device described.   When the lighting priority mode is set, the control target device selecting means preferentially selects the control target device related to lighting when selecting the control target device, and when the air conditioning priority mode is set, The power monitoring apparatus according to claim 1, wherein the control target device is preferentially selected.   When the fixed mode is set in the monitoring apparatus, the control target device selection unit selects the control target device according to the excess power so that the suppression control content determined for the fixed mode is performed. The power monitoring apparatus according to any one of claims 1 to 3.   The apparatus further comprises an alarm notification unit that issues an alarm when the predicted power exceeds the contracted power even if the power consumption of all the control target devices managed by the control target device management unit is suppressed. The power monitoring apparatus according to any one of claims 1 to 4.   The apparatus control unit further includes a suppression state management unit that records a suppression state of the control target device selected by the control target device selection unit, and upon restart, the device control unit records the suppression The power monitoring apparatus according to any one of claims 1 to 5, wherein suppression control is performed on the selected control target device based on a time state.   The said apparatus control means suppresses electric power used by interrupting | blocking the power supply with respect to the control object apparatus used as the object of the said suppression control, or changing the operation mode or operation state of the said control object apparatus. The power monitoring device according to claim 6.   The power monitoring apparatus according to any one of claims 1 to 7, further comprising an operation device for setting or changing information managed by the control target device management unit. A step of managing setting data in which a control target device and its power consumption are associated with each other for each control order when the control of the power consumption is controlled by the control target device management means;
A step of acquiring current power consumption at predetermined time intervals by a current power acquisition means;
A step of measuring the power consumption from the monitoring start time to the current time in a predetermined cycle by the power consumption measuring means;
A step of calculating, by predicted power calculation means, the power used in the predetermined period from the measured power consumption to the end of the predetermined period as predicted power;
A step of comparing the predicted power and the contract power by a power comparison means;
When the control target device selection unit determines that the predicted power exceeds the contract power by the power comparison unit, the power consumption of the control target device is sequentially integrated according to the control order, and the integrated value is the excess power. Selecting the control target device that is the target of the integration when exceeding minutes;
A step of executing a suppression control of power consumption for the selected control target device by the device control means; and
Selected by the control target device selecting means when the power control means determines that the predicted power does not exceed the contract power after the power control by the equipment control means is controlled by the equipment control means. Among the control target devices, the step of releasing the suppression control of the power used for the control target device whose control order is later, in which the sum of the power consumption is equal to or less than the difference between the contract power and the predicted power;
A power monitoring method. A step of managing setting data in which a control target device and its power consumption are associated with each other for each control order when the control of the power consumption is controlled by the control target device management means;
A step of acquiring current power consumption at predetermined time intervals by a current power acquisition means;
A step of measuring the power consumption from the monitoring start time to the current time in a predetermined cycle by the power consumption measuring means;
A step of calculating, by predicted power calculation means, the power used in the predetermined period from the measured power consumption to the end of the predetermined period as predicted power;
A step of comparing the predicted power and the contract power by a power comparison means;
When the control target device selection unit determines that the predicted power exceeds the contract power by the power comparison unit, the power consumption of the control target device is sequentially integrated according to the control order, and the integrated value is the excess power. Selecting the control target device that is the target of the integration when exceeding minutes;
A step of executing a suppression control of power consumption for the selected control target device by the device control means; and
Selected by the control target device selecting means when the power control means determines that the predicted power does not exceed the contract power after the power control by the equipment control means is controlled by the equipment control means. Among the control target devices, the step of releasing the suppression control of the power used for the control target device whose control order is later, in which the sum of the power consumption is equal to or less than the difference between the contract power and the predicted power;
A program that causes a computer to execute.

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