JP2006203959A - Power demand and supply adjusting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power demand and supply adjusting system equalized in a power load with respect to a power demand which abruptly changes, saved in a fuel expense by reducing the number of generators in order to cope with the abrupt change of the power demand, and dispensed with the introduction of new power equipment. <P>SOLUTION: A means is provided which remote-controls the charge and cutoff of power to a load apparatus of a power customer via a communication means from a power supply command office, and when a power requirement in a jurisdiction area is excessive in amount, the power is charged by selecting a power-chargeable disconnected prescribed load apparatus among the load apparatuses of the power customers. When the power requirement runs short in amount, the power is cut off by selecting a power-blockable charged prescribed load apparatuses among the load apparatuses of the power customer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power supply and demand adjustment system, and in particular, power supply and demand adjustment that can be used for efficient use of existing power generation facilities and power load leveling by adjusting supply and demand for fluctuating power supply and power consumption. About the system.

Usually, the amount of electric power used by electric power consumers reaches a peak during the daytime and uses less than half of the peak at night. For this reason, the electric power company constructs a power generation facility so that sufficient power supply can be performed at the peak of the daytime, and controls the power generation facility in accordance with the power demand in each time zone. For sudden changes in power demand (change width of about 500 MW, change time: several minutes) as shown in FIG. Etc. are considered.
In addition, the following patent documents 1, 2, etc. are well-known as an electric power supply-demand adjustment system.

JP 2003-324850 A JP 2001-177990 A

  However, when the supply and demand adjustment for sudden changes in power demand is to be carried out only by adjusting the output of the steam generator, the output adjustment capacity per steam generator is as small as several tens MW / min. It is necessary to always install multiple units, and extra fuel consumption is required.

  The present invention has been made in view of such circumstances, and aims to level the power load with respect to suddenly changing power demand, reduce the number of generators for coping with the sudden change in power demand, and reduce the fuel cost. The main challenge is to provide a power supply and demand adjustment system that saves energy and eliminates the need for new power supply equipment and makes effective use of existing power equipment.

  In order to achieve the above object, an electric power supply and demand adjustment system according to the present invention is a system for adjusting electric power supply and demand in a jurisdiction electric power system, and supplies power to a load device of an electric power consumer from a power supply command center via communication means. Load device control means for remotely controlling power on / off, power requirement calculation means for calculating power demand in the jurisdiction, and power demand calculated by the power demand calculation means is excessive or insufficient A determination means for determining whether or not the required amount of power is excessive by the determination means; among predetermined load devices of the power consumer that can be turned on; The input load device selection means to be selected, the power input means to turn on the power of the predetermined load device selected by the input load device selection means, and the power requirement amount is determined by the determination means. When it is determined that the load is selected, the load device selection means for selecting a predetermined load device that is turned on and capable of shutting off the power among the load devices of the electric power consumer, and selected by the interrupt load device selection means. And a power shut-off means for shutting off the power of the predetermined load device (claim 1).

  Therefore, when the power requirement in the jurisdiction region is excessive, power is turned on by the power-on means for the load equipment selected by the input load equipment selection means among the load equipment of the power consumer. Therefore, it is possible to spend excess supply power for this by increasing the power load, and if the power requirement in the jurisdiction is insufficient, the load load of the power consumer will be cut off. Since the power supply is cut off by the power cut-off means for the load device selected by the device selection means, it is possible to avoid a shortage of supplied power by reducing the power load. For this reason, it is possible to adjust power supply and demand with existing equipment by adjusting the power load in response to a sudden change in power demand.

  In addition, in the above configuration, in order to avoid the inconvenience that the power of a specific load device is frequently turned on and off, a predetermined load device that is turned on and that can be turned on, selected by the turned-on load device selection means, Different from the selected load device (Claim 2), and the predetermined load device that can be turned off and selected by the interrupt load device selection means is different from the load device selected last time. (Claim 4).

  As a specific example of such control, load devices of electric power consumers in the jurisdiction are divided into groups so that the operation state can be input based on the control time set for each group and selected by the input load device selection means. Select predetermined load devices that can be turned on in groups from the oldest control time (Claim 3), and load devices of power consumers in the jurisdiction are grouped and set in groups The operation state can be cut off on the basis of the controlled control time, and a predetermined load device that can be turned off and selected by the cut-off load device selection means can be selected in units of groups in order of oldest control time. (Claim 4).

  In addition, as a load apparatus of the electric power consumer mentioned above, it is good to use the night heat storage apparatus using late-night electric power, such as an electric water heater which can carry out remote control of turning on / off of a power supply, and eco ice (Claim 5).

  As described above, according to the first aspect of the present invention, when it is determined that the power requirement is excessive, the predetermined load device that is turned off and can be turned on among the load devices of the power consumer If it is determined that the required amount of power is insufficient, select a predetermined load device that can be turned off from among the load devices of the power consumer. Therefore, when the power supply is excessive, it is possible to increase the power load and spend the surplus power on this, and when the power supply is insufficient, the power load is reduced. It is possible to avoid a shortage of power supply by reducing the power supply. For this reason, it is possible to adjust power supply and demand with existing power supply facilities in response to sudden changes in power demand, so it is necessary to install a large number of generators for adjusting power supply and demand in order to cope with sudden changes in power demand. As a result, fuel costs can be saved and existing facilities can be used effectively.

  Further, according to the inventions according to claims 2 to 5, the load device selected when the power requirement is excessive or insufficient is the load device selected last time by, for example, wheel control. Since they are different, it is possible to avoid the inconvenience that a specific load device is frequently turned on and off.

  Furthermore, by using a night heat storage device such as an electric water heater as a load device of a power consumer, it becomes possible to cope with a sudden change in power demand particularly at night.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiment of the present invention will be described below with reference to the accompanying drawings.

  In FIG. 1, reference numeral 1 denotes a power system that performs power supply and demand operation in a predetermined area. This power system is connected to other power systems 4 and 5 through interconnection transmission lines 2 and 3, A plurality of generators G for supply are connected. The plurality of generators G are composed of a plurality of types of generators, and are composed of hydroelectric generators, thermal power generators including steam generators, and the like. The output (generated power) of each power generator is adjusted based on a command from the computer 6 so as to maintain the frequency of the power system 1 at a specified value.

  In addition to the general customer 7, an electric water heater customer 9 including a load device including the electric water heater 8 is connected to the electric power system 1, and a part or all of the electric water heater 8 is optically connected. It is connected to the computer 6 of the power supply command station via a communication line 21 such as a line, and makes it possible to transmit the water heater information such as the usage status and capacity of the electric water heater 8 to the computer 6 of the power supply command station. The electric water heater 8 can be turned on and off remotely based on a command from the computer 6 at the power supply command station.

  The computer 6 at the power supply command center includes a computer main body (CPU) 10 for load frequency control processing, a memory 11 as a storage medium for storing a program for executing the load frequency control processing, and each generator G and electric hot water. Input / output interface processing with the generator 8 (processing for inputting the output signal of the generator G to the computer main body 10 or transmitting a control command value from the computer main body 10 to the generator G, output signal of the electric water heater 8 Is input to the computer main body 10, processing for transmitting a power on / off command value from the computer main body 10 to the electric water heater 8, processing for inputting system information of the power system 1 described later to the computer main body 10, etc. A face 12 and the like are provided.

  The power system 1 is provided with a system information detection unit 13 that detects the frequency of the power system, the interconnection power flow, the interchanged power, etc. at predetermined timings. The electric water heater 8 includes the electric hot water. A water heater information detecting unit 14 for detecting the usage state and capacity of the water heater 8 is provided. Various information on the electric power system 1 and various information on the electric water heater 8 detected by these detecting units are the communication lines 22, 21 and The data is input to the computer main body 10 via the interface 12.

  The computer main body 10 has, as its processing functions, an AR calculation unit 23 that calculates the regional requirement amount AR that is the regional required power, a filter calculation unit 24 that filters the regional request amount AR, and the regional requirement amount AR. Creating an electric water heater control signal for generating a power on / off signal for the electric water heater 8 based on various information of the electric water heater to be controlled and calculating a control amount of the electric water heater 8 for power on / off control A control amount calculation unit 25, a generator control amount creation unit 26 that creates a generator control amount based on the filtered local requirement amount and the control amount of the electric water heater that is the target of power on / off control, and creation A generator output adjustment command value creating unit 27 for creating a generator output adjustment command value for adjusting the output of each generator G based on the generated generator control amount. When various information on the electric power system from the general information detection unit 13 and various information on the electric water heater 8 from the water heater information detection unit 14 are input via the communication lines 22 and 21 and the interface 12, the information is given to the memory 11. These input signals are processed in accordance with a predetermined program, and the turning on / off of the electric water heater 8 and the output of the generator G are controlled.

FIG. 2 shows an example of a control operation by the computer main body 10 of the computer 6 as a flowchart. Hereinafter, an example of the control operation will be described based on this flowchart.
The processing based on this flowchart is performed in a predetermined time period, for example, from 22:00 to 8:00 the next morning. When the computer body 10 reaches a predetermined time (22:00), A control target electric water heater table (to be described later) in which information related to the electric water heater 8 is stored is initialized, and the control times of all the electric water heaters 8 to be controlled are set to, for example, 99.99. Then, the operation state of the electric water heater 8 is set to “1” indicating the power-on state (step 50).

  Thereafter, based on the frequency of the power system detected by the system information detection unit 13, the interconnection transmission line power flow, and the interchanged power, the AR calculation unit 23 calculates the required amount (AR) in the region of the power system 1 (step 52). ) The calculated regional demand (AR) is subjected to filtering processing by the filter calculation unit 24 (step 54).

  Here, the calculation of the regional requirement amount (AR) in step 52 is performed as shown in FIG. 3, such as the frequency of the power system detected by the system information detection unit 13, the grid line power flow, and the interchanged power. Information is taken into the computer main body 10 via the communication line 22 and the interface 12 (step 70), the deviation of the linked transmission line power flow Pi between the power system and the other power system with respect to the reference power flow P0i, the interchangeable power control amount PMWH, power Based on the deviation of the frequency F of the system 1 with respect to the reference frequency F0, calculation is made using the following equation (1) (step 72).

(Equation 1)
AR = Σ (Pi−P0i) −ΣPMMWH−K (F−F0) −ΔP (1)
Here, K is a system constant, and ΔP is a correction amount.

  If the value of the regional power requirement (AR) is positive, the power supply is insufficient (AR shortage), so it is necessary to increase the generator output for the entire power system. For example, it indicates that it is necessary to lower the generator output as the entire power system because the supply power is excessive (AR excess).

  In step 56, the control amount Pc required for the entire power generator G in the power system 1 is calculated based on the filtered local request amount AR. That is, as shown in FIG. 4, the control amount Pc is calculated by PID control using the following equation (2) based only on the regional requirement amount calculated in step 54 (step 74).

(Equation 2)
Pc = ARj × KI + ΔARj × KP + (ΔARj−ΔARj−1) × KD + Σ (Pi−Bi) (2)
Where ARj is the current regional power requirement, ΔARj is the difference between the current regional power requirement and the previous regional power requirement (AR variation), ΔARj-1 is the previous AR variation, KI Is the integral gain, KP is the proportional gain, KD is the differential gain, Pi is the current output of the output adjustment target generator, Bi is the base command value of the output adjustment target generator, and the current output and base command value of the control target generator The control amount difference (ARj.times.KI + .DELTA.ARj.times.KP + (. DELTA.ARj-.DELTA.ARj-1) .times.KD) is added to the difference to the control amount Pc.

  The control amount Pc calculated at this stage is calculated based only on the regional requirement amount AR, and the power of the electric water heater 8 of the electric power consumer (electric water heater consumer 9) is controlled to be turned on and off. Adjustment by is not included.

  Thereafter, in step 58, it is determined whether or not the control designation of the electric water heater 8 for load adjustment is made. If there is no control designation of the electric water heater 8, the control amount calculated in the step 56 is set. The final control amount of the entire generator G (generator control amount: PCG) is set (step 60), and when there is a control designation of the electric water heater, the absolute value of the control amount calculated in step 56 (| It is determined whether or not Pc |) exceeds a preset upper limit value PCDmax (for example, 10 MW) (step 62).

  In step 62, if the control amount (| Pc |) calculated in step 56 is within the upper limit value PCDmax, there is no demand fluctuation that requires adjustment by the on / off control of the electric water heater 8, Assuming that adjustment by the on / off control of the electric water heater 8 is unnecessary, the control amount calculated in step 56 is set as the final control amount of the generator G (generator control amount: PCG). On the other hand, if the control amount (Pc) calculated in step 56 exceeds the upper limit value PCDmax, there is a strong demand for leveling the power load by the on / off control of the electric water heater. In step 64, on / off control of the electric water heater is performed, and the control amount adjusted by turning on / off of the electric water heater is subtracted from the control amount Pc calculated in step 56, which is finally controlled by the generator. Amount (generator control amount: PCG) (step 66). In addition, the processing of step 62 also has a function of providing a dead zone so that the on / off control of the electric water heater, which will be described later, does not hunting.

  After the final generator control amount PCG is calculated in step 60 or 66, the output of each generator is adjusted based on the control amount PCG (step 68). As shown in FIG. 5, this output adjustment is based on the following equation (3) by dividing the command value PG for each generator G by the control amount PCG according to the output adjustable amount of each generator. It is determined (step 300), and this command value PG is transmitted to the corresponding generator (step 302).

(Equation 3)
PG = PBi + PCG × Ri / ΣRi (3)
Here, PBi indicates the base command value, and Ri indicates the output adjustable amount of the output adjustment target generator.

  By the way, the on / off control of the electric water heater 8 in the step 64 is performed, for example, as shown in FIG. In the electric water heater on / off control, the electric water heaters to be controlled are grouped in advance, and the operation state is controlled based on the control time set for each group.

  First, the water heater information such as the use state and capacity detected by the water heater information detector 14 of the electric water heater 8 to be controlled is taken into the computer main body 10 via the communication line 21 and the interface 12 (step 80). The individual capacities of the electric water heaters that are not excluded from the control target are accumulated in the capacities of the group to which the control target electric water heater table is determined in advance for each water heater (step 82). Here, the electric water heaters that are not excluded from the control target are electric water heaters other than the electric water heaters that are predicted to be difficult to cook up to a predetermined temperature by a specified time by the microcomputer function of each water heater. It is a vessel.

  Then, in step 84, it is determined whether the regional power requirement (AR) is excessive or insufficient. If it is determined that the local power requirement is excessive (AR <0), a group in which the electric water heater 8 can be turned on because the supplied power is excessive is selected (step 86). The electric water heater 8 of the selected group is turned on. That is, the control selection flag is set to “1” indicating the power-on state for the selected group among the groups divided in the control target electric water heater table to be described later, and this control selection flag is set to “1”. A power “ON” signal is transmitted to the electric water heater 8 belonging to the group “”, and the electric water heater 8 is turned on (step 88).

  Here, the selection of the electric water heater chargeable group in step 86 is made by selecting a group-based rotation number so that a specific electric water heater is not frequently selected.

  FIG. 7 is a specific example thereof. Hereinafter, the selection process of the electric water heater charging possible group will be described. When the process of Step 86 is started, in Step 100, the control selection flag of the control target electric water heater table is shown. Is set to “0”, and in step 102, initial setting is performed to set the temporary control amount by the electric water heater to “0”. Here, as shown in FIG. 8, the control target electric water heater table is initialized to 0 in group unit operation state (1: ON, 0: OFF), capacity, control time, control selection flag (0). After that, “1” is set in the group to be input from now on. The capacity shown here is, as shown in FIG. 9, in the case of the M group, among the individual electric water heaters belonging to this group, the total capacity of the water heaters whose operation state is OFF (3 + 4 + 1 + 3 + 7 + 4 = 22 kW) ).

  After that, it is determined whether or not there is a group that can be turned on based on the presence or absence of the “0” group in which the operation state of the control target electric water heater table is off (step 104). In this case, the adjustment by turning on the electric water heater 8 is not performed, and this selection process is finished.

  On the other hand, if it is determined that there is a group that can be submitted, the control selection flag is set to “0” from among the groups that can be submitted and the capacity of the group with the oldest control time is set to the group control amount. (Step 106), and it is determined whether or not the value obtained by adding the group control amount to the temporary control amount is equal to or greater than the control amount upper limit value PCDmax by the electric water heater preset by the user (step 108). .

  If the value obtained by adding the group control amount to the temporary control amount does not reach the control amount upper limit value PCDmax by the electric water heater, set the control selection flag of the group with the oldest control time among the possible input groups to “1”. (In this example, 1 is set in the M group), and the current time when the processing in this step is performed is set as the control time (step 110). Then, a value obtained by adding the group control amount to the temporary control amount is set as a new temporary control amount (112), and the above steps 104 to 112 are performed in step 108, where the temporary control amount + group control amount is the upper limit of the control amount. Repeat until the value PCDmax is reached. That is, when the value obtained by adding the group control amount to the temporary control amount becomes equal to or greater than the control amount upper limit value PCDmax, the process of this selection flow is finished, and the electric water heater 8 is within the range of the control upper limit value specified in advance by the user. Can be turned on.

  Therefore, by this selectable group selection process, a group of electric water heaters that can be turned on within the range of the control upper limit value specified in advance by the user is selected, and the control time is updated to the latest time each time it is selected. Since the control selection flag is set to “1”, it is possible to adjust the total control amount of the electric water heater to be turned on at the same time according to the fluctuation of the power demand, and the input control can be performed. Each time it is performed, it becomes possible to make the group that is the target of the previous injection different from the group that is the target of the current input.

  In contrast to the above processing, if it is determined in step 84 of FIG. 6 that the regional power demand (AR) is insufficient (AR> 0), the supply power is insufficient, so the electric hot water A group in which the power of the heater can be cut off is selected (step 92), and the electric water heaters of the selected group are turned off. That is, the control selection flag is set to “0” indicating the power-off state for the selected group in the group of the control target electric water heater table to be described later, and the control selection flag is set to the group of “0”. A power off signal is transmitted to the electric water heater 8 to which the electric water heater 8 belongs, and the electric water heater 8 is turned off (step 94).

  Here, the selection of the electric water heater shut-off group in step 92 is made by selecting a group-based rotation number so that a specific electric water heater is not frequently selected.

  FIG. 10 shows a specific example thereof. Hereinafter, the selection process of the electric water heater cutoff possible group will be described. When the process of Step 92 is started, in Step 200, the control selection flag of the control target electric water heater table is shown. Is set to “1”, and in step 102, an initial setting for setting the temporary control amount by the electric water heater to “0” is performed. Here, as shown in FIG. 11, the control target electric water heater table is initialized in group unit operation state (1: ON, 0: OFF), capacity, control time, control selection flag (0). Then, 0 is set in the group to be blocked from now on). As shown in FIG. 12, in the case of the N group, the capacity shown here is the sum of the capacities (2 + 2 + 5 + 10 = 19 kW) of the water heaters whose operation state is ON among the individual electric water heaters belonging to this group. ).

  Thereafter, it is determined whether or not there is a blockable group based on the presence or absence of the group “1” in which the operation state of the control target electric water heater table is on (step 204), and it is determined that there is no blockable group. In this case, the selection process is finished without adjusting the electric water heater by turning off the power.

  On the other hand, if it is determined that there is a blockable group, the control selection flag is set to “0” from among the blockable groups, and the capacity of the group with the oldest control time is stored as the group control amount. Then, it is determined whether or not the value obtained by adding the group control amount to the temporary control amount is equal to or greater than the control amount upper limit value PCDmax by the electric water heater preset by the user (step 108).

  If the value obtained by adding the group control amount to the temporary control amount does not reach the control amount upper limit value PCDmax by the electric water heater, set the control selection flag of the group with the oldest control time among the shut-off groups to “0”. (In this example, 0 is set in the N group), and the current time when the processing in this step is performed is set as the control time (step 210). Then, a value obtained by adding the group control amount to the temporary control amount is set as a new temporary control amount (212), and the above steps 204 to 212 are performed in step 208, where the temporary control amount + group control amount is the control amount upper limit value. Repeat until PCDmax is reached. That is, when the value obtained by adding the group control amount to the temporary control amount becomes equal to or greater than the control amount upper limit value PCDmax, the process of this selection flow is finished, and the electric water heater 8 is within the range of the control upper limit value specified in advance by the user. The power can be turned off.

  Therefore, the group of electric water heaters that can be turned off within the range of the control upper limit value designated in advance by the user is selected by this group selection process that can be cut off, and the control time is updated to the latest time each time it is selected. Since the control selection flag is set to “0”, it becomes possible for the user to adjust the total control amount of the electric water heater that simultaneously shuts off the power according to fluctuations in power demand. Each time it is performed, it becomes possible to make the group to be blocked last time different from the group to be blocked this time.

  Therefore, according to the on / off control of the electric water heater described above, when the required amount AR in the area changes suddenly beyond a certain dead zone as shown in FIG. When the negative threshold value is further exceeded, the electric water heaters belonging to the group selected by the selection process of the electric water heater input possible group in FIG. 7 are turned on (ON), and the local requirement AR is When the value further exceeds the positive threshold, the electric water heaters belonging to the group selected by the selection process of the electric water heater interruptible group in FIG. 10 are shut off (OFF). The electric water heaters that are turned on and off belong to a specific group because the electric water heaters belonging to a group different from the group that was turned on and off last time are selected in order of oldest control time. The electric water heater is not frequently turned on and off.

  The temporary control amount used by the above processing is set to PCD in step 90 or 96 in FIG. 6, and as described above, the electric water heater is added to the control amount Pc calculated in step 56 in step 66 in FIG. The final generator control amount (generator control amount: PCG) is calculated by taking into account the control amount determined by the on / off control of No. 8, and this control amount is used to adjust the output of each generator G in step 68. Apportioned according to the possible amount.

  Therefore, in the above-described configuration, the power load can be leveled even if the power demand changes suddenly by the on / off control of the electric water heater 8 of the electric power consumer (electric water heater consumer 9). It is possible to reduce the number of generators to cope with sudden changes in energy consumption, save fuel costs, and suppress the introduction of new power supply facilities to enable the efficient use of existing power generation facilities. .

  In the above configuration, an example of using an electric water heater that uses late-night power as a load device of an electric power consumer has been shown, but other night heat storage devices such as eco ice may be used.

FIG. 1 is a diagram showing a configuration example of a power supply and demand adjustment system according to the present invention. FIG. 2 is a flowchart showing an operation example of the power supply and demand adjustment system according to the present invention. FIG. 3 is a flowchart showing a subroutine for calculating the required amount (AR) in the area shown in step 52 of FIG. FIG. 4 is a flowchart showing a control amount (PC) calculation subroutine shown in step 56 of FIG. FIG. 5 is a flowchart showing a subroutine for adjusting the output of the generator shown in step 68 of FIG. FIG. 6 is a flowchart showing a subroutine for performing on / off control of the electric water heater shown at step 64 in FIG. FIG. 7 is a flowchart showing a subroutine for selecting the electric water heater charging possible group shown in step 86 of FIG. FIG. 8 is a diagram illustrating an example of a control-target electric water heater table used when selecting an electric water heater chargeable group. FIG. 9 is a diagram illustrating a calculation example of the group capacity when the M group is selected as the group that can be entered. FIG. 10 is a flowchart showing a subroutine for selecting the electric water heater cutoff possible group shown in step 92 of FIG. FIG. 11 is a diagram illustrating an example of a control target electric water heater table used when selecting an electric water heater interruptible group. FIG. 12 is a diagram illustrating a calculation example of the group capacity when the N group is selected as the blockable group. Fig.13 (a) is a diagram which shows the time change of an electric power demand, FIG.13 (b) is a line which shows the state which performs on / off control of an electric water heater with respect to the change shown to Fig.13 (a). FIG.

Explanation of symbols

1 Power system 4, 5 Other power system 6 Power supply command center computer 8 Electric water heater 9 Electric water heater customers

Claims (6)

In the system to adjust the power supply and demand in the jurisdiction power system,
A load device control means for remotely controlling power on / off from a power supply command station to a load device of a power consumer via a communication means;
A power requirement calculation means for calculating a power requirement in the jurisdiction;
A determination unit that determines whether the power request amount calculated by the power request amount calculation unit is excessive or insufficient;
When it is determined by the determination means that the amount of power required is excessive, input load device selection means for selecting a predetermined load device that can be turned on from among load devices of the power consumer;
A power-on means for powering on the predetermined load equipment selected by the on-load equipment selection means;
An interruption load device selection means for selecting a predetermined load device that can be turned off from among the load devices of the electric power consumer when it is determined by the determination means that the power requirement is insufficient; ,
A power supply / demand adjustment system, comprising: a power cutoff unit that shuts off a power source of the predetermined load device selected by the cutoff load device selection unit. 2. The electric power supply and demand adjustment system according to claim 1, wherein the predetermined load device that is turned off and that can be turned on and selected by the input load device selection means is different from the load device selected last time. The load devices of the power consumers in the jurisdiction are grouped and the operation state can be turned on based on the control time set for each group, and the power supply selected by the load device selection means can be turned on. The power supply adjustment system according to claim 2, wherein the predetermined load device is selected in units of groups in order of oldest control time. 2. The electric power supply and demand adjustment system according to claim 1, wherein the predetermined load device that is turned on and that can be turned off, selected by the interruption load device selection means, is different from the load device selected last time. The load devices of the electric power consumers in the jurisdiction are grouped and the operation state can be cut off based on the control time set for each group, and the power source selected by the cut-off load device selection means can be turned off. The power supply adjustment system according to claim 4, wherein the predetermined load device is selected in units of groups in order of oldest control time. The power supply adjustment system according to any one of claims 1 to 5, wherein the load device of the electric power consumer is a nighttime heat storage device.

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