JP6778891B2 - Power management system, power management method and program - Google Patents

Description

The present invention generally relates to a power management system , a power management method and a program , and more particularly to a power management system , a power management method and a program for managing the amount of power used in a consumer facility.

Conventionally, a power management device for executing demand control for power consumption by a device (load device) has been proposed (see, for example, Patent Document 1).

The power management device described in Patent Document 1 includes a target value acquisition means for acquiring a demand target value of the amount of power used (power consumption) by the device, and a storage means for storing calendar information about the user. There is. Further, the power management device described in Patent Document 1 includes a setting means for adjusting and setting a demand target value based on calendar information. Then, when the calendar information predicts that the power consumption is low in the user's home, the demand target value is adjusted in the direction of lowering the upper limit of the power consumption.

Japanese Unexamined Patent Publication No. 2013-252007

However, in the power management device described in Patent Document 1, the demand target value is adjusted based on the calendar information about the user stored in the storage means, so that the storage means does not store the calendar information in advance. No adjustment is made to the demand target value. Therefore, for example, when a power company suddenly requests a temporary reduction in power consumption due to a tight supply and demand of power, there is a possibility that the reduction in power consumption cannot be realized.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a power management system , a power management method, and a program capable of realizing a reduction in power consumption even when a temporary reduction in power consumption is urgently required. And.

The power management system according to one aspect of the present invention includes a first acquisition unit, a second acquisition unit, a demand control unit, and a change unit. The first acquisition unit acquires the power consumption information representing the power consumption of the consumer facility. The second acquisition unit acquires a power saving request requesting reduction of power consumption during a designated period from an external device provided outside the consumer facility by communication. The demand control unit controls the equipment of the consumer facility based on the power consumption information acquired by the first acquisition unit so that the power consumption in a predetermined demand time period does not exceed the demand target value. Perform demand control. Based on the power saving request acquired by the second acquisition unit, the changing unit changes the demand target value so as to lower the demand target value during the designated period. The demand control unit has the power consumption amount at the end time of the demand time period based on the power consumption information acquired by the first acquisition unit after a predetermined standby time has elapsed from the start time point of the demand time period. Is obtained as the predicted electric energy, and the demand control is performed so that the predicted electric energy does not exceed the demand target value. The waiting time is configured to be shortened during the designated period.
The power management method according to one aspect of the present invention includes a first acquisition step, a second acquisition step, a demand control step, and a change step. The first acquisition step is a step of acquiring power consumption information representing the amount of power used by the consumer facility. The second acquisition step is a step of acquiring a power saving request requesting reduction of power consumption in a designated period from an external device provided outside the consumer facility by communication. The demand control step controls the equipment of the consumer facility based on the power consumption information acquired in the first acquisition step so that the power consumption in the predetermined demand time period does not exceed the demand target value. This is the step of performing demand control. The change step is a step of changing the demand target value so as to lower the demand target value during the designated period based on the power saving request acquired in the second acquisition step. In the demand control step, after a predetermined standby time has elapsed from the start time of the demand time period, the power consumption amount at the end time of the demand time period is based on the power consumption information acquired in the first acquisition step. Is obtained as the predicted electric energy, and the demand control is performed so that the predicted electric energy does not exceed the demand target value. The waiting time is configured to be shortened during the designated period.
The program according to one aspect of the present invention is a program for causing one or more processors to execute the power management method.

The present invention has an advantage that the reduction in power consumption can be realized even when a temporary reduction in power consumption is urgently required.

FIG. 1 is a graph showing the operation of the power management system according to the first embodiment of the present invention. FIG. 2 is a system configuration diagram showing the configuration of the same power management system. FIG. 3 is a block diagram showing the configuration of the same power management system. FIG. 4 is a graph showing the operation of the power management system according to the second embodiment of the present invention.

(Embodiment 1)
(1) Outline The power management system 1 (see FIG. 2) according to the present embodiment is a system for managing the amount of power used in the consumer facility 100 (see FIG. 2). The term "consumer facility" as used herein means a facility managed and used by an electric power consumer. In the present embodiment, non-residential facilities such as office buildings, commercial facilities, hospitals, welfare facilities, hotels and factories will be described as an example of the consumer facility 100, but the consumer facility 100 is, for example, an apartment house or a detached house. It may be a house or the like.

The power management system 1 has, as a main function, a demand control function for suppressing an increase in the maximum demand power of the consumer facility 100. The "maximum demand power" here is also called a power receiving point demand power or a demand value, and is an average power consumption (average power consumption) in a predetermined (for example, every 30 minutes) demand time period T1 (see FIG. 1). Value), which is the maximum value in each month (one month). The maximum value of the maximum power demand for the past year is called "contract power", and based on this contract power, the consumer (manager or user of the consumer facility 100) is an electric power company or the like. There is a system that determines the electricity charges to be paid to electric power companies. Under such a system, the power management system 1 suppressing the maximum demand power of the consumer facility 100 leads to the reduction of electricity charges. In short, the power management system 1 suppresses the increase in the average power consumption in the demand timed T1 at the consumer facility 100 by the demand control function, keeps the "maximum demand power" below the current contract power, and reduces the electricity rate. It is possible to suppress the rise. The suppression of the increase in the average power consumption is basically realized by controlling the device 5 (see FIG. 2) of the consumer facility 100.

Here, the maximum demand power is the maximum value of the average power consumption in the demand timed T1 for one month, but the average power consumption in the demand timed T1 is the amount of power used in the demand timed T1 (time integrated value of the power used). It is expressed by multiplying by a constant (predetermined coefficient). For example, when the demand timed T1 is 30 minutes, the power consumption of the demand timed T1 is doubled x [kWh] to obtain 2x [kWh], which is the power consumption for one hour. The average power consumption in the demand timed T1 at this time is a value obtained by multiplying the power consumption in the demand timed T1 by a constant (here, "2"), that is, 2x [W]. Therefore, in demand control, suppressing the amount of power used in the demand timed T1 to a certain target value (demand target value) or less reduces the average power consumption in the demand timed T1 to a certain power target value (twice the demand target value). ) Equivalent to suppressing below. Therefore, the power management system 1 according to the present embodiment controls the device 5 of the consumer facility 100 as demand control so that the amount of power used in the demand timed T1 does not exceed the demand target value Vp (see FIG. 1). As a result, the increase in the average power consumption of the demand timed T1 is suppressed.

Further, the power management system 1 according to the present embodiment is a demand for reducing the power consumption of the consumer facility 100 during the designated period Td1 in response to a power saving request requesting reduction of the power consumption during the designated period Td1 (see FIG. 1). It has a Demand Response function. The "power saving request" here is also called a DR (Demand Response) request. For example, when the power supply and demand is tight or the wholesale power price soars, an electric power company such as an electric power company becomes the source. This is an instruction to request consumers to reduce power consumption. The reduction of the power consumption of the consumer facility 100 is basically realized by controlling the device 5 (see FIG. 2) of the consumer facility 100. That is, in the power management system 1, the demand response function can realize the reduction of the power consumption even when a temporary reduction of the power consumption is urgently required.

As described above, the power management system 1 has a demand control function for suppressing an increase in the maximum demand power of the consumer facility 100, and reduces the power consumption of the consumer facility 100 in the designated period Td1 in response to a power saving request. It has a demand response function for. The power management system 1 according to the present embodiment does not have these two types of functions (demand control function and demand response function) individually, but collectively performs them in one routine (Routine). Specifically, the power management system 1 realizes the demand response function in the processing related to the demand control function by changing the demand target value Vp to the designated period Td1 based on the power saving request. In other words, the power management system 1 changes the parameter (demand target value Vp) used in the demand control function that controls the device 5 so that the amount of power used does not exceed the demand target value Vp, in the designated period Td1. It is possible to reduce the power consumption. Therefore, in the power management system 1, by using the demand control function for suppressing the increase in the maximum demand power of the consumer facility 100, the power consumption of the consumer facility 100 in the designated period Td1 can be efficiently and easily used. A demand response function for reduction can be realized.

In this embodiment, as an example, a model in which an electric power aggregator intervenes between an electric power company such as an electric power company and a consumer (the manager or user of the consumer facility 100) is used to trade electric power. Suppose. An electric power aggregator is a business that manages multiple consumers and obtains incentives by conducting Negawatt Power transactions with electric power companies. More specifically, when the electric power aggregator receives a power saving request from the electric power company, which is a request for reduction of the electric power consumption, the electric power aggregator reduces the electric power used in the consumer facility 100 for each of the plurality of consumers managed by itself. Give instructions to let them. When the power consumption is reduced at the plurality of consumer facilities 100 in accordance with this instruction, the electric power aggregator receives compensation from the electric power company according to the actual results of the power consumption reduction at the plurality of consumer facilities 100. obtain. In this embodiment, the case where the consumer facility 100 receives electric power only from the electric power system and the distributed power source such as the photovoltaic power generation facility is not provided in the consumer facility 100 is illustrated.

(2) Configuration Hereinafter, the configuration of the power management system 1 according to the present embodiment will be described in detail with reference to FIG.

As shown in FIG. 2, the power management system 1 according to the present embodiment is composed of a controller 2 and a server device 3. The controller 2 is provided in the consumer facility 100. A measurement system 4 and a plurality of devices 51, 52, 53, ... 5n are connected to the controller 2.

Each of the plurality of devices 5 is an electric device (including equipment) such as a lighting device and an air conditioner provided in the consumer facility 100, and is an electric device to be controlled by the controller 2. Hereinafter, when a plurality of devices 51, 52, 53, ... 5n are not particularly distinguished, each of the plurality of devices 51, 52, 53, ... 5n is simply referred to as "device 5".

The measurement system 4 is configured to be capable of measuring at least the amount of power used by the consumer facility 100. The "electric energy used by the consumer facility 100" here is the total electric energy used (consumed) by the consumer facility 100, and is the total electric energy supplied from the power system to the consumer facility 100. .. That is, the measurement system 4 measures the total value of the electric energy used in all the electric devices of the consumer facility 100 as the electric energy used. Here, the electric device to be measured by the measurement system 4 may include an electric device other than the device 5 to be controlled by the controller 2.

The measurement system 4 has, for example, a watt-hour meter attached to the cubicle 61 of the consumer facility 100 and a measurement unit attached to the distribution board 62 of the consumer facility 100. As a result, the measurement system 4 can measure the amount of power used by the consumer facility 100 with at least a watt-hour meter attached to the cubicle 61. Further, the measurement system 4 can also measure the amount of power used for each branch circuit by the measurement unit attached to the distribution board 62. The measurement system 4 outputs information indicating the amount of power used by the consumer facility 100 and the amount of power used for each branch circuit to the controller 2 as power consumption information. Further, an alarm device 7 is connected to the measurement system 4. For example, when the amount of power used is about to exceed the demand target value Vp, the measurement system 4 causes the alarm device 7 to output an alarm by voice.

The controller 2 is configured to be able to communicate with, for example, the measurement system 4 and a plurality of devices 51, 52, 53, ... 5n. The controller 2 has a function of acquiring power consumption information from the measurement system 4. Further, the controller 2 has a function of controlling a plurality of devices 51, 52, 53, ... 5n and controlling the plurality of devices 51, 52, 53, ... 5n. The controller 2 controls the on / off of the device 5 and the operating state of the device 5 by, for example, transmitting a control command to the device 5. For example, the controller 2 can control dimming to adjust the brightness of the device 51 made of lighting equipment, and can control the temperature set value, air volume, etc. of the device 52 made of air conditioning equipment. is there.

The communication method between the controller 2 and each of the measurement system 4 and the device 5 is, for example, wired communication such as RS232C or RS485, or Wi-Fi (registered trademark) or low power radio (specific small) that does not require a license. It is wireless communication such as power wireless). For this type of low-power radio, specifications such as the frequency band and antenna power to be used are specified in each country according to the application. In Japan, low-power radios that use radio waves in the 920 MHz band or 420 MHz band are specified.

Further, the controller 2 is connected to a network 81 such as the Internet via a router 82. The server device 3 is connected to the network 81. The controller 2 is configured to be able to communicate with the server device 3 in both directions via the network 81. The controller 2 will be described in detail in the column of "(3) Details".

The server device 3 and the controller 2 form a power management system 1. The server device 3 is, for example, a computer managed and operated by a power aggregator in the present embodiment. That is, in FIG. 2, only one server device 3 and one controller 2 are shown, but in reality, one server device 3 is managed by a plurality of consumer facilities (customers) managed by the electric power aggregator. A plurality of controllers 2 provided in the facility 100) are connected so as to be able to communicate with each other. Further, an external device 9 provided outside the consumer facility 100 is connected to the network 81. The server device 3 is configured to be able to communicate with the external device 9 in both directions via the network 81.

The external device 9 is a computer managed and operated by an electric power company such as an electric power company. As will be described in detail later, the external device 9 transmits a power saving request for reducing the power consumption in the designated period Td1 to the server device 3. For example, when the power supply and demand is tight, the external device 9 becomes the source, and the power saving request is transmitted to the server device 3.

An information terminal such as a smartphone, a tablet terminal, or a personal computer may be connected to the network 81. In this case, it is preferable that the controller 2 transmits, for example, the power consumption information acquired from the measurement system 4, the information indicating the control status of the device 5, and the like to the information terminal via the server device 3. As a result, information (power consumption information, etc.) related to the consumer facility 100 can be displayed and visualized on the information terminal regardless of whether it is inside or outside the consumer facility 100.

(3) Details Next, the details of the power management system 1 according to the present embodiment will be described with reference to FIG.

The power management system 1 includes a first acquisition unit 11, a second acquisition unit 12, a control unit 13, and a storage unit 14. In the present embodiment, among the components of the power management system 1 shown in FIG. 3, only the second acquisition unit 12 is provided in the server device 3, and all the components other than the second acquisition unit 12 are provided in the controller 2. There is. Therefore, the exchange of information between the second acquisition unit 12 and the control unit 13 is realized by communication between the server device 3 and the controller 2.

The first acquisition unit 11 acquires the power consumption information representing the power consumption of the consumer facility 100. Specifically, the first acquisition unit 11 acquires the power consumption information from the measurement system 4 by communicating with the measurement system 4.

The second acquisition unit 12 acquires a power saving request for reducing the power consumption during the designated period Td1 from an external device 9 provided outside the consumer facility 100 by communication. That is, the second acquisition unit 12 acquires a power saving request from the external device 9 by communicating with the external device 9.

The control unit 13 includes a demand control unit 131, an energy saving control unit 132, a change unit 133, and a return unit 134. The control unit 13 mainly comprises a microcomputer, and the microcomputer functions as a demand control unit 131, an energy saving control unit 132, a change unit 133, and a return unit 134.

The demand control unit 131 is based on the power consumption information acquired by the first acquisition unit 11 so that the power consumption in the predetermined demand time period T1 (see FIG. 1) does not exceed the demand target value Vp (see FIG. 1). Demand control is performed to control the device 5 of the consumer facility 100. That is, the demand control unit 131 realizes a demand control function for suppressing an increase in the maximum demand power of the consumer facility 100, as described in the column of "(1) Overview". Here, when a predetermined period (for example, one day) is divided into a plurality of time zones each having a predetermined time width (for example, 30 minutes), each of the plurality of time zones after the division has a demand time limit T1. is there. Specifically, the demand control unit 131 controls the device 5 for each demand time period T1 so that the electric energy used by the consumer facility 100 at the end of the demand time period T1 is within the demand target value Vp or less. Since the determination as to whether or not the electric energy of the consumer facility 100 falls within the demand target value Vp or less is performed for each demand time period T1, the electric energy of the consumer facility 100 used for this determination is the demand time period T1. Is reset to zero at the beginning of.

As an example of demand control, there is a control for lowering the dimming level (brightness) of the device 51 made of a lighting device or turning it off depending on the situation. Further, as another example of demand control, there is a control for raising the temperature set value during the cooling operation or stopping the device 52, which is an air conditioner, depending on the situation. This type of demand control is executed in a plurality of stages (for example, eight stages), and the power consumption of the device 5 can be suppressed for each stage.

The energy saving control unit 132 performs energy saving control for suppressing the power consumption of the device 5. Here, the energy-saving control unit 132 has a plurality of operation modes including an energy-saving mode in which energy-saving control is performed and a release mode in which energy-saving control is not performed. In the present embodiment, the operation mode of the energy saving control unit 132 is only two, an energy saving mode and a release mode. That is, if the operation mode of the energy saving control unit 132 is the release mode, the controller 2 does not perform the energy saving control of the device 5, so that the device 5 operates freely according to the user's operation. On the other hand, if the operation mode of the energy-saving control unit 132 is the energy-saving mode, the controller 2 executes the energy-saving control of the device 5, so that the power consumption of the device 5 can be suppressed. The operation mode of the energy saving control unit 132 can be switched by, for example, a user operation.

As an example of energy-saving control, there is a control that automatically adjusts the dimming level (brightness) of the device 51 made of a lighting device based on the detection result of the illuminance sensor. Further, as another example of energy-saving control, there is a control for automatically adjusting a temperature set value, an air volume, and the like based on a detection result of a temperature sensor for a device 52 composed of an air conditioner. This type of energy-saving control can suppress the power consumption of the device 5 within a range that does not impair the comfort of the user.

The change unit 133 changes the demand target value Vp so as to reduce the demand target value Vp during the designated period Td1 (see FIG. 1) based on the power saving request acquired by the second acquisition unit 12. Here, the change unit 133 sets the demand target value Vp from the first value V1 (see FIG. 1) to the second value V2 (see FIG. 1) during the designated period Td1 based on the power saving request acquired by the second acquisition unit 12. ). That is, when the designated period Td1 starts, the change unit 133 changes the demand target value Vp used for the demand control in the demand control unit 131 from the first value V1 to the second value V2 (<. Change to V1). Specifically, when the current time (current time) reaches the start time of the designated period Td1, the change unit 133 changes the "demand target value" stored in the storage unit 14 from the first value V1 to the second value V2. And update.

The return unit 134 restores the demand target value Vp changed by the change unit 133 to the value before the change after the end of the designated period Td1. Here, the return unit 134 changes the demand target value Vp from the second value V2 to the first value V1 (see FIG. 1) after the end of the designated period Td1 based on the power saving request acquired by the second acquisition unit 12. To do. That is, when the designated period Td1 ends, the return unit 134 sets the demand target value Vp used for the demand control by the demand control unit 131 from the second value V2 to the first value V1 (> higher than the second value V2. Change to V2). Specifically, when the current time (current time) reaches the end of the designated period Td1, the return unit 134 changes the "demand target value" stored in the storage unit 14 from the second value V2 to the first value V1. And update.

Here, the first value V1 and the second value V2 are generated, for example, by the server device 3 including the second acquisition unit 12. Specifically, in the server device 3, for example, 95% of the contracted power is the first value V1 based on the contracted power of the consumer facility 100 (the maximum value among the maximum demanded power in the past year). The first value V1 is calculated so as to be. Further, the server device 3 analyzes the power saving request acquired by the second acquisition unit 12, and calculates the second value V2 from the first value V1 using the analysis result of the power saving request. For example, when the power saving request requests that the power consumption be reduced by 15%, the server device 3 calculates the second value V2 so that 85% of the first value V1 becomes the second value V2. The controller 2 receives the first value V1 and the second value V2 calculated by the server device 3 and sets (changes, restores) the demand target value Vp. Further, not limited to this configuration, the first value V1 and the second value V2 may be generated by, for example, the controller 2 or may be stored in advance in the storage unit 14.

The storage unit 14 stores the “demand target value” and the “reservation information”. In FIG. 3, the “demand target value” and the “reservation information” stored in the storage unit 14 are represented as blocks surrounded by broken lines. The “demand target value” stored in the storage unit 14 is the current demand target value Vp, that is, the demand target value Vp used for demand control in the demand control unit 131. The "reservation information" stored in the storage unit 14 is information representing a reservation period consisting of a future designated period Td1 based on a power saving request acquired by the second acquisition unit 12 and a changed demand target value Vp in the reservation period. Is. Therefore, if the reservation information is stored in the storage unit 14 in advance, the change unit 133 and the return unit 134 can change or restore the demand target value Vp according to the reservation information.

The controller 2 and the server device 3 included in the power management system 1 both have a computer (including a microcomputer) as a main configuration. Therefore, by executing the program recorded in the memory of the computer on the processor of the computer, the computer can function as the power management system 1 having the above-described configuration. The program may be pre-recorded in a memory, provided through a telecommunication line such as the Internet, or may be recorded and provided on a recording medium such as a memory card.

(4) Operation Next, the operation of the power management system 1 according to the present embodiment will be described with reference to FIG. Hereinafter, each of the basic operation, the operation at the start of the designated period Td1, the operation at the end of the designated period Td1, and the reserved operation will be described. FIG. 1 is a graph showing the electric energy [kWh] of the consumer facility 100 with the horizontal axis as the time axis. In the example of FIG. 1, the electric energy [kWh] of the consumer facility 100 for 2 hours from 11:30 to 13:30 is shown. As explained in the column of "(1) Overview", the average power consumption in the demand timed T1 is a value obtained by multiplying the power consumption in the demand timed T1 by a constant, so the vertical axis of FIG. 1 is the average power consumption. Even if it is read as, the graph is the same as in FIG.

Here, as an example, it is assumed that one hour from 12:00 to 13:00 is designated as the designated period Td1 in the power saving request, and a request is made to reduce the power consumption in the designated period Td1 by 15%. ..

(4.1) Basic operation First, the basic operation of the power management system 1 will be described.

In the present embodiment, the demand time period T1 is set in 30-minute units such as 11:30 to 12:00, 12:00 to 12:30, 12:30 to 13:00, 13:00 to 13:30, and so on. It is set. Therefore, in FIG. 1, for example, focusing on the demand timed T1 from 11:30 to 12:00, the electric energy used by the consumer facility 100 increases with the passage of time from 11:30, which is the start time of the demand timed T1. Is gradually increasing. Here, since the power management system 1 has a demand control function, the demand is such that the amount of power used by the consumer facility 100 at the end of the demand time period T1 is within the demand target value Vp for each demand time period T1. The control unit 131 controls the device 5. In FIG. 1, the demand target value Vp is shown by a alternate long and short dash line.

Specifically, the demand control unit 131 obtains the power consumption of the consumer facility 100 at the end of the demand time period T1 as the predicted power consumption based on the power consumption information acquired by the first acquisition unit 11. There is. Then, the demand control unit 131 controls the device 5 (demand control) so that the obtained predicted electric energy does not exceed the demand target value Vp stored in the storage unit 14. More specifically, the demand control unit 131 obtains the predicted electric energy in a predetermined determination cycle (for example, a 1-minute cycle) within the demand timed T1, and compares the predicted electric energy with the demand target value Vp to obtain the predicted electric energy. Is determined whether or not is equal to or less than the demand target value Vp. Here, there are various methods for calculating the predicted electric energy. As an example, the predicted electric energy is calculated by using the electric energy used from the start time of the demand timed T1 to the present time and the rate of change (increase rate) of the electric energy used. There is a way to calculate. However, not limited to this method, the demand control unit 131 uses, for example, the detection results of various sensors (illuminance sensor, temperature sensor, etc.) and the actual value of the amount of power used in the past (for example, the same month of the previous year). , The predicted electric energy may be calculated.

Then, if the predicted power amount exceeds the demand target value Vp, the demand control unit 131 executes control of the device 5 so as to suppress the power consumption of the device 5, and the predicted power amount is equal to or less than the demand target value Vp. For example, the control of the device 5 is not executed. In FIG. 1, "C1", "C2", and "C3" represent the timing at which the first-stage control, the second-stage control, and the third-stage control are performed, respectively. That is, in the demand timed T1 from 11:30 to 12:00, the demand control unit 131 determines that the predicted electric energy exceeds the demand target value Vp twice at around 11:45 and around 11:52. Each time, the demand control of the device 5 is executed. When the demand control unit 131 determines that the predicted electric energy exceeds the demand target value Vp, the alarm device 7 may output an alarm by voice.

Here, since the demand timed T1 from 11:30 to 12:00 does not correspond to the designated period Td1 (12:00 to 13:00), the demand target value Vp is the default value in this demand timed T1. The first value is set to V1 (> V2). Therefore, in the demand timed T1 from 11:30 to 12:00, the demand control unit 131 reduces the electric energy used by the consumer facility 100 to the first value V1 or less, which is the demand target value Vp even at the end of the demand timed T1. It is suppressed to. The first value V1, which is the default value of the demand target value Vp, is set based on the contract power (the maximum value among the maximum demand power in the past year). For example, 95% of the contract power is the first value. It is set to 1 value V1.

By the way, the demand control unit 131 is at the end of the demand time T1 based on the power consumption information acquired by the first acquisition unit 11, except for the mask period Tm1 from the start of the demand time T1 to the elapse of the standby time. The amount of power used is calculated as the predicted amount of power. Here, the waiting time is shorter than the time width of the demand timed T1. In the present embodiment, as an example, the time width of the demand timed T1 is 30 minutes, while the waiting time is set to 10 minutes. That is, since the power consumption used for calculating the predicted electric energy is reset to zero at the start of the demand timed T1, the prediction accuracy of the predicted electric energy is insufficient immediately after the start of the demand timed T1. The fluctuation of the predicted electric energy becomes large. Therefore, the demand control unit 131 does not obtain the predicted electric energy in the mask period Tm1 from the start time of the demand timed T1 to the elapse of the standby time, and starts calculating the predicted electric energy after the elapse of the mask period Tm1. Therefore, in the demand timed T1 from 11:30 to 12:00, the demand control unit 131 does not compare the predicted electric energy with the demand target value Vp during the mask period Tm1 until 11:40, and 11:40. After that, the predicted electric energy and the demand target value Vp are compared.

Further, as a comparison target of the predicted electric energy, for example, a cutoff alarm threshold value, a caution alarm threshold value, or the like may be set. The cutoff alarm threshold value and the caution alarm threshold value are values determined based on the demand target value Vp. For example, the cutoff alarm threshold value is 80% of the demand target value Vp, and the caution alarm threshold value is the demand target value. It consists of a value of 70% of Vp. In this case, it is preferable that the demand control unit 131 causes the alarm device 7 to output an alarm by voice when it is determined that the predicted electric energy exceeds the cutoff alarm threshold value or the caution alarm threshold value. Since the cutoff alarm threshold value, the caution alarm threshold value, and the like are determined based on the demand target value Vp, if the demand target value Vp is the first value V1, the value is based on the first value V1.

In the present embodiment, the operation mode of the energy saving control unit 132 can be switched between the energy saving mode in which the energy saving control is performed and the release mode in which the energy saving control is not performed by the user's operation. Therefore, regardless of the demand time limit T1 and the designated period Td1, the energy saving control unit 132 can operate in either the energy saving mode or the release mode.

(4.2) Operation at the start of the designated period Next, the operation of the power management system 1 at the start of the designated period Td1 will be described.

As shown in FIG. 1, during the designated period Td1, the demand target value Vp is changed by the change unit 133 so as to lower the demand target value Vp. Here, since 12:00 to 13:00 is designated as the designated period Td1, 12:00 is the start time of the designated period Td1. Therefore, when the current time reaches the start time of the designated period Td1 (that is, 12:00), the change unit 133 changes the "demand target value" stored in the storage unit 14 from the first value V1 to the second value V2 (<. Change to V1). As a result, in the two demand time periods T1 of 12:00 to 12:30 and 12:30 to 13:00 corresponding to the designated period Td1, the demand control unit 131 changes the demand target value Vp (= V2). ) Is used to control the demand.

The operation of the power management system 1 after the change of the demand target value Vp is the same as the above-mentioned basic operation except that the demand target value Vp differs between the first value V1 and the second value V2. When the demand target value Vp is changed, the values determined based on the demand target value Vp (for example, the cutoff alarm threshold value and the caution alarm threshold value) are also changed. Therefore, the cutoff alarm is given during the designated period Td1. The threshold value, caution alarm threshold value, etc. also decrease.

By the way, in the present embodiment, when the second acquisition unit 12 acquires the power saving request during the designated period Td1, the change unit 133 changes the demand target value Vp so as to further lower the demand target value Vp. That is, the change unit 133 is configured to change the demand target value Vp based on the power saving request acquired by the second acquisition unit 12 regardless of whether or not it is during the designated period Td1. Therefore, for example, after the first power saving request is issued, it is necessary to further reduce the power consumption within the designated period Td1 specified in the first power saving request, and the second power saving request is issued. In such a case, the demand target value Vp can be further lowered. In this case, the demand target value Vp is changed to a value lower than the second value V2.

(4.3) Operation at the end of the designated period Next, the operation of the power management system 1 at the end of the designated period Td1 will be described.

As shown in FIG. 1, after the end of the designated period Td1, the demand target value Vp is returned to the value (first value V1) before the start of the designated period Td1 by the return unit 134. Here, since 12:00 to 13:00 is designated as the designated period Td1, 13:00 is the end time of the designated period Td1. Therefore, when the current time reaches the end time of the designated period Td1 (that is, 13:00), the return unit 134 sets the “demand target value” stored in the storage unit 14 from the second value V2 to the first value V1 (>). Change to V2). As a result, in the demand time period T1 from 13:00 to 13:30 after the end of the designated period Td1, the demand control unit 131 performs demand control using the demand target value Vp (= V1) after the return. ..

The operation of the power management system 1 after the return of the demand target value Vp is the same as the basic operation described above. When the demand target value Vp is changed, the values determined based on the demand target value Vp (cutoff alarm threshold value, caution alarm threshold value, etc.) are also changed. Therefore, when the designated period Td1 ends, the cutoff alarm threshold value is changed. , And the caution alarm threshold value also returns to the values before the start of the specified period Td1.

(4.3) Reservation Operation Next, the reservation operation of the power management system 1 using the reservation information will be described.

Since the power management system 1 according to the present embodiment can store "reservation information" in the storage unit 14, the demand target value Vp is changed to the reservation period which is the future designated period Td1 by using this "reservation information". It is possible to do. That is, when the second acquisition unit 12 acquires a power saving request for the reservation period consisting of the future designated period Td1, the storage unit 14 contains the reservation period and information representing the changed demand target value Vp in the reservation period. , Stored as reservation information.

In the example of FIG. 1, for example, when the second acquisition unit 12 acquires a power saving request for designating a future designated period Td1 (12:00 to 13:00) at 10:00, the storage unit 14 receives the power saving request. , Reservation information is stored. This reservation information is information indicating that the demand target value Vp is changed to the second value V2 during the designated period Td1 from 12:00 to 13:00. In this case, the changing unit 133 changes the demand target value Vp during the reservation period (12:00 to 13:00) according to the reservation information stored in the storage unit 14. Similarly, the return unit 134 restores the demand target value Vp after the end of the reservation period (12:00 to 13:00) according to the reservation information stored in the storage unit 14.

Due to such a reservation operation, for example, even in a situation where the second acquisition unit 12 cannot receive the power saving request in real time due to a communication error of the server device 3, the change unit 133 can use the demand target value Vp in the designated period Td1. Can be changed.

(5) Advantages As described above, the power management system 1 according to the present embodiment includes a first acquisition unit 11, a second acquisition unit 12, a demand control unit 131, and a change unit 133. The first acquisition unit 11 acquires the power consumption information representing the power consumption of the consumer facility 100. The second acquisition unit 12 acquires a power saving request for reducing the power consumption during the designated period Td1 from an external device 9 provided outside the consumer facility 100 by communication. The demand control unit 131 controls the device 5 of the consumer facility 100 based on the power consumption information acquired by the first acquisition unit 11 so that the power consumption in the predetermined demand timed T1 does not exceed the demand target value Vp. Demand control is performed. The change unit 133 changes the demand target value Vp so as to reduce the demand target value Vp during the designated period Td1 based on the power saving request acquired by the second acquisition unit 12.

According to this configuration, based on the power saving request acquired by the second acquisition unit 12, the change unit 133 so as to reduce the demand target value Vp used for the demand control by the demand control unit 131 to the specified period Td1. The demand target value Vp is changed. Therefore, in the power management system 1, it is possible to realize the reduction of the power consumption even when the temporary reduction of the power consumption is urgently required. Moreover, the power management system 1 realizes the demand response function in the processing related to the demand control function by changing the demand target value Vp to the designated period Td1 based on the power saving request. Therefore, in the power management system 1, by using the demand control function for suppressing the increase in the maximum demand power of the consumer facility 100, the power consumption of the consumer facility 100 in the designated period Td1 can be efficiently and easily used. A demand response function for reduction can be realized.

Further, as in the present embodiment, it is preferable that the power management system 1 further includes a storage unit 14. The storage unit 14 stores the reservation period consisting of the future designated period Td1 based on the power saving request acquired by the second acquisition unit 12 and the information representing the changed demand target value Vp in the reservation period as the reservation information. In this case, it is preferable that the change unit 133 is configured to change the demand target value Vp during the reservation period according to the reservation information stored in the storage unit 14. According to this configuration, for example, even in a situation where the second acquisition unit 12 cannot receive the power saving request in real time, the change unit 133 can change the demand target value Vp in the designated period Td1. However, the storage unit 14 is not an essential configuration for the power management system 1, and the storage unit 14 may be omitted as appropriate.

Further, as in the present embodiment, when the second acquisition unit 12 acquires the power saving request during the designated period Td1, the change unit 133 changes the demand target value Vp so as to further reduce the demand target value Vp. It is preferable that it is configured in. According to this configuration, for example, after the first power saving request is issued, if it becomes necessary to further reduce the power consumption within the specified period Td1 specified by the first power saving request, the demand target It is possible to further reduce the value Vp to further reduce the power consumption. However, this configuration is not essential for the power management system 1, and the change unit 133 does not have to change the demand target value Vp when the second acquisition unit 12 acquires a power saving request during the designated period Td1. ..

(6) Modification Example The power management system 1 is not essential to include a controller 2 having a microcomputer as a main configuration and a server device 3 composed of a computer, and may be configured by one device. On the contrary, the power management system 1 may be distributed to three or more devices. Further, at least a part of the functions of the power management system 1 may be realized by, for example, the cloud (cloud computing).

Further, the information for determining the designated period Td1 may or may not be included in the power saving request. When the information for determining the designated period Td1 is not included in the power saving request, for example, the electric power aggregator receives the power saving request from the electric power company and includes the contents of the command to the plurality of consumer facilities 100 including the designated period Td1. To decide. As an example, the electric power aggregator instructs the consumer facility 100 in district A to reduce the power consumption by 20% by setting the designated period Td1 from 12:00 to 13:00, and sets the designated period Td1 to the consumer facility 100 in district B. It is instructed to reduce the power consumption by 20% from 13:00 to 14:00.

Further, the start time point of the designated period Td1 and the end time point of the designated period Td1 do not have to coincide with the division (start time point or end time point) of the demand time limit T1. Further, the designated period Td1 may be longer or shorter than the demand timed T1, or may be the same time length as the demand timed T1. That is, for example, when the demand time period T1 is set in units of 30 minutes such as 12:00 to 12:30, 12:30 to 13:00, and so on, the specified period Td1 is 12: 15 to 12:45. , Or it may be set as 12: 10-12: 30. In this case, even in the middle of the demand time limit T1, the demand target value Vp may be changed by starting or ending the designated period Td1.

Further, the power management system 1 does not have to include the server device 3 as a component. In this case, the second acquisition unit 12 for acquiring the power saving request is provided not in the server device 3 but in the controller 2. In this case, the second acquisition unit 12 acquires the demand target value Vp generated (changed) by the server device 3 based on the power saving request from the server device 3. In other words, the second acquisition unit 12 does not directly acquire the power saving request, but indirectly acquires it via the server device 3. Then, the change unit 133 changes the demand target value Vp used in the demand control according to the power saving request (demand target value Vp) acquired by the second acquisition unit 12. In this configuration as well, the power management system 1 acquires the power saving request in the second acquisition unit 12, and the change unit 133 changes the demand target value Vp based on the power saving request.

Further, the power management system 1 may include the measurement system 4 and a plurality of devices 5 to be controlled as components. The power management system 1 may include an external device 9 as a component.

Further, the return unit 134 may be omitted. In this case, the power management system 1 changes the demand target value Vp at the start of the designated period Td1, but does not automatically restore the demand target value Vp even after the designated period Td1 ends. Therefore, even after the end of the designated period Td1, the demand target value Vp remains the second value V2.

Further, in the demand control, the demand control unit 131 may suppress the average power consumption in the demand timed T1 to be equal to or less than the power target value (a constant multiple of the demand target value Vp). That is, as described in the column of "(1) Overview", the average power consumption in the demand timed T1 is a value obtained by multiplying the power consumption in the demand timed T1 by a constant. Therefore, for example, when the demand timed T1 is 30 minutes, if twice the demand target value Vp is set as the power target value, controlling the average power consumption of the demand timed T1 to be equal to or less than the power target value can be controlled by the demand timed T1. It is equivalent to suppressing the amount of power used to the demand target value Vp or less. Whether the average power consumption is set to the power target value or less or the power consumption amount is set to the demand target value Vp or less can be arbitrarily changed depending on the setting of the demand target value Vp or the power target value. Therefore, there is no technical difference in whether the average power consumption is below the power target value or the power consumption is below the demand target value Vp. Therefore, in the demand control for controlling the device 5 so that the amount of power used in the demand timed T1 does not exceed the demand target value Vp, the device 5 is controlled so that the average power used in the demand timed T1 does not exceed the power target value. Control is also included.

Further, in the first embodiment, in the comparison between the two values such as the power consumption and the demand target value Vp, the place where "less than or equal to" is set is when the two values are equal and one of the two values is less than the other. It means to include both the case and the case. However, the present invention is not limited to this, and "less than or equal to" may be synonymous with "less than" including only the case where one of the two values is less than the other. That is, whether or not the two values are equal can be arbitrarily changed depending on the setting of the threshold value and the like, so there is no technical difference between "less than or equal to" and "less than". Similarly, "greater than or equal to" may be synonymous with "exceeding".

(Embodiment 2)
The power management system 1 according to the present embodiment is different from the power management system 1 according to the first embodiment in the operation in the designated period Td1. Hereinafter, the same configurations as those in the first embodiment will be designated by a common reference numeral and description thereof will be omitted as appropriate.

FIG. 4 is a graph showing the operation of the power management system 1 according to the present embodiment. FIG. 4 is a graph showing the electric energy [kWh] of the consumer facility 100 with the horizontal axis as the time axis. Further, in FIG. 4, the operation mode of the energy saving control unit 132 is shown above the graph.

In the present embodiment, the energy saving control unit 132 is configured to operate in the energy saving mode at least for the designated period Td1. That is, the operation mode of the energy saving control unit 132 can be arbitrarily switched between the energy saving mode and the release mode by the user's operation except for the designated period Td1, but the energy saving mode is forcibly set in the designated period Td1. Specifically, the energy-saving control unit 132 forcibly operates in the energy-saving mode when the current time (current time) reaches the start time of the designated period Td1 (12:00 in the example of FIG. 4). In the example of FIG. 4, since the energy-saving control unit 132 operates in the release mode until 12:00, the operation mode of the energy-saving control unit 132 is switched from the release mode to the energy-saving mode at the start of the designated period Td1. become. When the designated period Td1 ends, that is, when the current time (current time) reaches the end of the designated period Td1, the operation mode of the energy saving control unit 132 is the operation mode before the start of the designated period Td1 (the release mode in the example of FIG. 4). Return to.

Further, in the present embodiment, the demand control unit 131 is configured to shorten the standby time during the designated period Td1. That is, in the designated period Td1, the mask period Tm2 becomes shorter as shown in FIG. In FIG. 4, for comparison with the mask period Tm2, the period corresponding to the mask period other than the designated period Td1 is shown as "Tm1", but in fact, the mask period is not "Tm1" but "Tm2". The period shown. In the present embodiment, as an example, the waiting time in the designated period Td1 is set to 7 minutes while the waiting time in the designated period Td1 is 10 minutes. That is, the demand control unit 131 can start the demand control at an early stage by shortening the mask period Tm2 in which the predicted electric energy and the demand target value Vp are not compared in the designated period Td1.

FIG. 4 shows a graph at 12:20, and the future power consumption predicted by the demand control unit 131 is shown by a two-dot chain line. That is, in the example of FIG. 4, the expected power amount becomes equal to or less than the demand target value Vp by executing the first stage control (demand control) at the timing of “C1” after the end of the mask period Tm2. Has been revised downwards.

When 12:00 to 13:00 is designated as the designated period Td1, the demand time period T1 from 12:30 to 13:00 is the same as the demand time period T1 from 12:00 to 12:30 shown in FIG. , The operation mode of the energy saving control unit 132 becomes the energy saving mode. Further, the standby time is set short even in the demand time period T1 from 12:30 to 13:00.

In the present embodiment, shortening the waiting time to the limit (zero) is equivalent to the absence of the mask period Tm2. In this case, in the designated period Td1, as soon as the demand timed T1 starts, the predicted electric energy and the demand target value Vp are compared.

As described above, the power management system 1 according to the present embodiment has a plurality of operation modes including an energy saving mode in which energy saving control is performed to suppress the power consumption of the device 5 and a release mode in which energy saving control is not performed. The energy-saving control unit 132 is further provided. The energy saving control unit 132 is preferably configured to operate in the energy saving mode at least for the designated period Td1. According to this configuration, the energy-saving control unit 132 automatically operates in the energy-saving mode during the designated period Td1 where reduction of power consumption is required, so that the power consumption of the device 5 is suppressed, and after the change. It becomes easy to suppress the amount of power consumption below the demand target value Vp (= V2) of. Therefore, it becomes easy to reduce the power consumption in the designated period Td1.

Further, as in the present embodiment, the demand control unit 131 predicts the power consumption at the end of the demand time period T1 based on the power consumption information acquired by the first acquisition unit 11 except for the mask period Tm2. It is preferable to obtain it as an amount. The mask period Tm2 is a period from the start time of the demand time period T1 to the elapse of the waiting time. In this case, it is preferable that the demand control unit 131 performs demand control so that the predicted electric energy does not exceed the demand target value Vp. In this case, the demand control unit 131 is preferably configured to shorten the standby time during the designated period Td1. According to this configuration, the mask period Tm2 is shortened during the designated period Td1 for which reduction of power consumption is required, and the demand control can be started at an early stage. Therefore, the changed demand target value Vp (=) V2) It becomes easier to reduce the amount of power used below. Therefore, it becomes easy to reduce the power consumption in the designated period Td1.

However, the power management system 1 according to the present embodiment applies both a configuration in which the energy saving control unit 132 operates in the energy saving mode during the designated period Td1 and a configuration in which the standby time is shortened during the designated period Td1. Is not required and only one of them may be applied. That is, in the power management system according to the present embodiment, the energy saving control unit 132 may operate in the release mode during the designated period Td1, or the standby time may not be shortened during the designated period Td1.

The configuration described in the second embodiment can be applied in appropriate combination with various configurations (including modified examples) described in the first embodiment.

1 Power management system 5,51,52,53, ... 5n Equipment 11 1st acquisition unit 12 2nd acquisition unit 100 Consumer facility 131 Demand control unit 132 Energy saving control unit 133 Change unit 14 Storage unit T1 Demand time limit Td1 Specified period Tm1 , Tm2 mask period Vp demand target value

Claims (6)

The first acquisition department that acquires power consumption information that represents the amount of power used by consumer facilities,
A second acquisition unit that acquires a power saving request for a reduction in power consumption during a designated period from an external device installed outside the customer facility by communication.
Demand control that controls the equipment of the consumer facility based on the power consumption information acquired by the first acquisition unit so that the power consumption in a predetermined demand time period does not exceed the demand target value. Department and
Based on the power saving request acquired by the second acquisition unit, a change unit that changes the demand target value so as to lower the demand target value during the designated period is provided.
The demand control unit
After a predetermined standby time has elapsed from the start time of the demand time period, the power consumption amount at the end time of the demand time period is obtained as a predicted electric energy amount based on the power consumption information acquired by the first acquisition unit. , The demand control is configured so that the predicted electric energy does not exceed the demand target value .
A power management system configured to shorten the standby time during the designated period . Further provided is a storage unit that stores as reservation information a reservation period consisting of the future designated period based on the power saving request acquired by the second acquisition unit, and information representing the changed demand target value in the reservation period. ,
The power management system according to claim 1, wherein the changing unit is configured to change the demand target value during the reservation period according to the reservation information stored in the storage unit. Further provided with an energy-saving control unit having a plurality of operation modes including an energy-saving mode for performing energy-saving control for suppressing the power consumption of the device and a release mode for not performing the energy-saving control.
The power management system according to claim 1 or 2, wherein the energy-saving control unit is configured to operate in the energy-saving mode at least for the designated period. The change unit is configured to change the demand target value so as to further reduce the demand target value when the second acquisition unit acquires the power saving request during the designated period.
The power management system according to any one of claims 1 to 3. The first acquisition step to acquire the power consumption information indicating the power consumption of the consumer facility, and
The second acquisition step of acquiring a power saving request requesting reduction of power consumption during a designated period from an external device provided outside the customer facility by communication, and
Demand control that controls the equipment of the consumer facility based on the power consumption information acquired in the first acquisition step so that the power consumption in the predetermined demand time period does not exceed the demand target value. Steps and
Based on the power saving request acquired in the second acquisition step, it has a change step of changing the demand target value so as to lower the demand target value in the designated period.
The demand control step
After a predetermined standby time has elapsed from the start time of the demand time period, the power consumption amount at the end time of the demand time period is obtained as a predicted electric energy amount based on the power consumption information acquired in the first acquisition step. , The demand control is configured so that the predicted electric energy does not exceed the demand target value.
The waiting time is configured to be shortened during the designated period.
Power management method. A program for causing one or more processors to execute the power management method according to claim 5.

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