JP2009225629A - Demand control system - Google Patents

Abstract

An object of the present invention is to prevent the occurrence of problems such that power consumption exceeds a threshold when demand control is terminated, or the end and start of demand control are repeated in a short time.
A control unit, which is a control unit, includes a reduction expected power of an environmental adjustment device that performs demand control and a sum of power measured by a power measuring device less than a threshold, and the environment measuring device. When the measured value 4 is changed to reduce the power consumed by the environmental adjustment device, the demand control for the environmental adjustment device is terminated. As a result, it is possible to prevent the occurrence of problems such that the power consumption exceeds the threshold when the demand control is finished, or the end and start of the demand control are repeated in a short time.
[Selection] Figure 1

Description

  The present invention relates to a demand control system that controls the operation of each device so that the demand (consumption) power (demand) of an environmental adjustment device such as an air conditioner or a lighting device does not exceed contract power.

  In recent years, in order to reduce energy costs, consumers themselves predict demand (demand power), and equipment (air conditioning equipment) so that demand power (integrated value for 30 minutes measured by a demand meter) does not exceed contracted power. Demand control systems that perform demand control (power demand control) for controlling environmental adjustment devices such as lighting equipment and the like have become widespread (see, for example, Patent Document 1).

  In a conventional demand control system, when the predicted value of demand power exceeds a predetermined threshold, the set temperature of the air conditioning equipment is changed (the set temperature is increased during cooling operation, and the set temperature is decreased during heating operation) By reducing the dimming level of the lighting equipment, the power consumption of the air conditioning equipment or lighting equipment is reduced.

Here, while the demand control is performed, the temperature of the air conditioner is changed or the dimming level of the lighting device is lowered. There is a high possibility of not being comfortable. Therefore, when the predicted value of the demand power falls below the threshold value during demand control, it is desirable to end the demand control and return the environmental adjustment device to the normal operation state as much as possible. Therefore, in the conventional example described in Patent Literature 1, the threshold value is the sum of the current power consumption and the demand power that is expected to increase when the demand control of the environmental adjustment device for which demand control is executed is terminated. Compared to the above, the demand control of the environmental adjustment device is terminated only when the threshold value is not exceeded.
JP 2007-236038 A (see paragraphs 0068-0074 and FIG. 9)

  By the way, in the conventional example described in Patent Document 1, the demand power increases when the demand control is terminated with respect to the current power consumption (demand power) in determining whether to terminate the demand control. Only the point of whether to do is considered. However, environmental variables such as temperature and illuminance fluctuate depending on the outdoor environment (outdoor temperature and illuminance). For example, demand control is performed to change the temperature during air-conditioning operation to a high level. In this case, the increase in the demand power when the demand control is finished is clearly different between when the outdoor temperature is rising and when the outdoor temperature is falling. Therefore, in the above conventional example in which demand control is terminated without considering outdoor environmental changes, the demand power exceeds the threshold when the demand control is terminated and the environmental adjustment device is returned to the normal operating state. There is a possibility that a malfunction may occur such that the end or start of demand control is repeated in a short time.

  The present invention has been made in view of the above circumstances, and its purpose is that when the demand control is finished, the power consumption exceeds a threshold value, or the demand control is finished and started for a short time. It is an object of the present invention to provide a demand control system capable of preventing the occurrence of a problem such as being repeated repeatedly.

  In order to achieve the above object, the first aspect of the present invention provides a plurality of environmental adjustment devices that adjust the indoor environment, an environmental measurement device that measures the outdoor environment, and power that measures the power consumed by the environmental adjustment device. A demand control device that predicts demand power based on the power measured by the power measurement device, and demand-controls the environmental adjustment device so that the demand power does not exceed a predetermined threshold. The control device performs demand control on the first storage unit that stores the measurement value of the environment measurement device and the power measured by the power measurement device in association with the measured time, and the plurality of environment adjustment devices. The second storage means for storing the priority, the current demand control status, and the expected power expected to be reduced by the demand control for each of the plurality of environmental adjustment devices, and the power measured by the power measuring device And a demand for any environmental adjustment device according to the priority stored in the second storage means when the predicted value of the prediction means exceeds a predetermined threshold value Control means for executing control, and the control means has a sum of the expected power of the environmental adjustment device that is executing demand control and the power measured by the power measuring device is less than the threshold value, and the environment The demand control for the environmental adjustment device is terminated when the measurement value of the measurement device changes in a direction to reduce the power consumed by the environmental adjustment device.

  The invention of claim 2 is the invention of claim 1, comprising a refrigerator having a defrosting function as an environmental adjusting device, and the control means of the demand control device is configured such that the refrigerator performing the demand control has a defrosting function. The sum of the increase in power when used and the power measured by the power measuring device is less than the threshold value, and the measured value of the environmental measuring device changes to reduce the power consumed by the refrigerator. The defrosting function is used by the refrigerator when the air conditioner is in use.

  The invention of claim 3 is the invention of claim 1 or 2, comprising a thermal storage type thermal environment device as the environment adjustment device, and the control means of the demand control device consumes the measured value of the environment measurement device by the air conditioning device. The energy stored in the air-conditioning equipment is used when the power is changed in the direction of increasing the power.

  A fourth aspect of the present invention is the demand control apparatus according to any one of the first to third aspects, further comprising an outdoor lighting device that has a timer function to turn on / off at a predetermined time and illuminates the outdoors. The control means is configured such that the sum of the increase in power when the outdoor lighting device is turned on by the timer function and the power measured by the power measuring device is less than the threshold value, and the measured value of the environment measuring device is the environment The timer function is used in the outdoor lighting device when the power consumption of the adjusting device is changed to reduce the power consumption.

  The invention of claim 5 is characterized in that, in the invention of claim 4, the control means of the demand control device corrects the lighting time in the timer function when the outdoor lighting equipment is not used.

  According to the present invention, it is possible to prevent the occurrence of problems such that the power consumption exceeds the threshold when the demand control is finished, or the end and start of the demand control are repeated in a short time.

  Hereinafter, an embodiment in which the technical idea of the present invention is applied to a demand control system installed in a store selling a fresh food (a convenience store, a supermarket, etc.) will be described in detail with reference to the drawings.

  The demand control system of the present embodiment includes a plurality of environmental adjustment devices that adjust the indoor (inside the store) environment, an environmental measurement device 4 that measures the outdoor environment, and power measurement that measures the power consumed by the environmental adjustment device. A demand control device 1 that predicts demand power based on the power measured by the power measuring device 5 and demand-controls the environmental adjustment device so that the demand power does not exceed a predetermined threshold. ing. The environmental adjustment device in the present embodiment includes an air conditioning device that adjusts the temperature and humidity in the store, a thermal environment adjustment device 2 such as a refrigerator for storing and displaying frozen foods, an indoor lighting device that illuminates the store, and a store. And an illuminating device 3 such as an outdoor illuminating device installed outside. However, although only one thermal environment adjusting device 2 and one lighting device 3 are illustrated in FIG. 1, there are actually a plurality of thermal environment adjusting devices 2 and lighting devices 3, respectively. The power measuring device 5 constantly measures the power consumption in the entire store including the power consumed by the environment adjusting device (the thermal environment adjusting device 2 and the lighting device 3), and outputs the measured value to the demand control device 1. Yes. The environment measuring device 4 measures an outdoor thermal environment (temperature / humidity) and outputs the measured value to the demand control device 1.

  The demand control device 1 includes a control unit 10 composed of hardware including a CPU and its peripheral circuits (RAM, ROM, timer, etc.) and software executed by the CPU, and an outdoor thermal environment measurement value output from the environment measurement device 4. And a measured value input unit 11 to which a measured value (power consumption) output from the power measuring device 5 is input and a control command output from the control unit 10 to the thermal environment adjusting device 2 and the lighting device 3 as described later. The device communication unit 12 that transmits individually, and a demand prediction unit that predicts an integrated value every 30 minutes of power consumption measured by the power measuring device 5 and determines whether the predicted value exceeds a predetermined threshold value 13 and a first storage unit 14 and a second storage unit 15 made of a rewritable nonvolatile semiconductor memory (for example, EEPROM).

  The demand prediction unit 13 integrates power consumption (demand power) measured in real time by the power measuring device 5, predicts an integrated demand value for 30 minutes from the integrated value, and the predicted value exceeds a threshold value. Whether or not the predicted value exceeds the threshold value, a demand warning is output to the control unit 10. Note that the threshold value is set to a value lower than the contract power of the store, for example, 95% of the contract power.

When the control unit 10 receives the demand alarm output from the demand prediction unit 13, the control unit 10 performs demand control on any of the environmental adjustment devices to reduce power demand. Specifically, the environmental adjustment device is stopped (or turned off), or an operation that consumes less power than the previous operation (hereinafter referred to as “normal operation”), for example, during cooling operation. As shown in FIG. 2, the first storage unit 14 performs measurement by the environment measuring device 4 such as raising the set temperature of the air conditioner or lowering the dimming level of the lighting fixture as demand control. Value (thermal environment data consisting of outdoor temperature and humidity), the measured value (power consumption value) measured by the power measuring device 5, and the integrated value of power consumption obtained by the demand prediction unit 13 at the measured time The associated history database is stored. The power consumption integrated value is a value obtained by dividing the integrated value of power consumption in minutes by 30 minutes. In the illustrated example, the history of each data is stored at an interval of 1 minute, but the power consumption integrated value is initialized to 0 minutes and 30 minutes every hour.

  As shown in FIG. 3, the second storage unit 15 stores a control / recovery database including items of control order, return order, device name, current state, and expected reduction power. The control order indicates the order (priority) to be executed by the control unit 10 when a demand warning is received, and the demand control is performed in order from the environmental adjustment device having the highest order (smaller number). It will be selected for execution. The return order indicates the order (priority) in which the demand control is terminated and returned to normal operation when there are multiple environmental adjustment devices for which demand control is being executed. The demand control is terminated in order from the device, and the normal operation is resumed. The device name is a name for identifying all the environmental adjustment devices (the thermal environment adjustment device 2 such as an air conditioner and a refrigerator, and the lighting device 3 such as a lighting device). A serial number is assigned to each type, such as “lighting fixture 2” and “air conditioner 1”. In the current state, a state in which each environmental adjustment device is under demand control is represented as “in control”, and a state in which normal operation is performed without demand control is represented as “normal operation”. The expected reduction power is power expected to be reduced when the environmental adjustment device is demand-controlled, and is represented by a value obtained by dividing power consumption in units of minutes in the illustrated example. Note that the expected power reduction may be, for example, the average power consumption for the last 30 minutes, or may be calculated from the rated power of the device if the power consumption for each device is not measured. For example, 50% of the rated power may be used as the expected reduction power.

  Next, the operation of the demand control device 1 will be described. The demand prediction unit 13 integrates power consumption (demand power) measured in real time by the power measuring device 5, predicts an integrated demand value for 30 minutes from the integrated value, and the predicted value exceeds a threshold value. Whether or not the predicted value exceeds the threshold value, a demand warning is output to the control unit 10. When the control unit 10 receives the demand alarm output from the demand prediction unit 13, the control unit 10 refers to the control / return database stored in the second storage unit 15, and selects the environmental adjustment device having the highest control order in order. It is determined whether up to the environmental control device in the range is the target of demand control. In other words, since the expected reduction power when the demand control is executed is different for each environmental adjustment device, the sum of the respective expected reduction powers is within a range in which the difference between the predicted value of the demand prediction unit 13 and the threshold value is larger. If the minimum number of environmental adjustment devices are targeted for demand control, the demand power can be prevented from exceeding the threshold value. The control unit 10 generates a control command for demand-controlling one or more environmental adjustment devices determined as described above, for example, a control command for stopping the environmental adjustment device, and generates a control command from the device communication unit 12. Send to the environmental control device. Then, when the environmental adjustment device that has received the control command from the demand control device 1 is stopped, the power consumption measured by the power measuring device 5 is reduced.

  Furthermore, the operation of the demand control device 1 in a situation where any one of the thermal environment adjusting devices 2 is demand-controlled will be described with reference to the flowchart of FIG.

  In the demand control device 1, the measurement value (thermal environment data) measured every minute by the environment measurement device 4 is taken into the measurement value input unit 11 (step S <b> 1), and further measured every minute by the power measurement device 5. The measured value (power consumption data) to be measured is taken into the measured value input unit 11 (step S2), and the control unit 10 writes these data in the history database of the first storage unit 14 in association with the measured time t. At the same time, it is determined whether or not the thermal environment data At at time t exceeds a predetermined reference value (step S3). When the thermal environment data At exceeds the reference value, the control unit 10 compares the previous thermal environment data At-1 (time t-1) with the current thermal environment data At, and the thermal environment data At tends to increase. Or whether it is in a decreasing tendency (step S4).

  When the thermal environment data At tends to increase, the control unit 10 obtains a difference ΔAt between the current thermal environment data At and the reference value as a variation value of the thermal environment (step S5) and the first storage unit 14 The amount of increase in power consumption corresponding to the fluctuation value ΔAt is estimated with reference to the history database stored in (Step S6), and further, with reference to the control / return database stored in the second storage unit 15 Then, a new environmental control device for demand control is determined so that the estimated reduction power is equal to or greater than the estimated increase amount (step S7). The control unit 10 generates a control command for demand-controlling one or more environmental adjustment devices additionally determined as described above, and causes the device communication unit 12 to transmit the control commands to the environmental adjustment device.

  On the other hand, when the thermal environment data At is in a decreasing tendency, the control unit 10 compares the current power consumption Et (at time t) with the previous power consumption Et-1 (at time t-1) to obtain the power consumption Et. It is determined whether the trend is increasing or decreasing (step S8). When the power consumption Et tends to increase, the control unit 10 obtains an increase ΔEt of the power consumption Et from the previous time to the current time, and refers to the control / return database stored in the second storage unit 15 to reduce the power consumption Et. A new demand adjustment target environment adjusting device is determined so that the expected power is equal to or larger than the increase ΔEt (step S9). The control unit 10 generates a control command for demand-controlling one or more environmental adjustment devices additionally determined as described above, and causes the device communication unit 12 to transmit the control commands to the environmental adjustment device.

  When the thermal environment data At at time t is equal to or less than the reference value, the control unit 10 compares the previous thermal environment data At-1 (time t-1) with the current thermal environment data At to compare the thermal environment data. It is determined whether At is increasing or decreasing (step S10). If there is a tendency to decrease, the control unit 10 refers to the control / return database stored in the second storage unit 15 and increases when the environmental adjustment device whose current state is “in control” is returned to normal operation. Then, the sum total of the expected power consumption (= expected power reduction) is calculated (step S11). Then, the control unit 10 determines whether or not the sum of the power (recovery power) Ft expected to increase upon return and the current power consumption is below the threshold (step S12), and exceeds the threshold. In this case, none of the environmental adjustment devices are returned, but when the value is lower than the threshold value, a value ΔFt obtained by subtracting the sum of the return power Ft and the current power consumption is obtained from the threshold value and stored in the second storage unit 15. With reference to the stored control / recovery database, the environmental adjustment device that terminates the demand control is determined from among the environmental adjustment devices that are under demand control so that the expected power reduction does not exceed the value ΔFt (step S13). The control unit 10 generates a control command for ending demand control of the one or more environmental adjustment devices determined as described above and returning to normal operation, and sends the control command from the device communication unit 12 to the environmental adjustment device. To send to. Then, the environmental adjustment device that has received the control command from the demand control device 1 returns to normal operation.

  As described above, in the present embodiment, the control unit 10 serving as a control unit has a sum of the reduction expected power of the environmental adjustment device that is executing the demand control and the power measured by the power measuring device 5 less than the threshold value. In addition, since the demand control for the environmental adjustment device is terminated when the measurement value of the environmental measurement device 4 is changed to reduce the power consumed by the environmental adjustment device, the power consumption is reduced when the demand control is terminated. It is possible to prevent the occurrence of problems such as exceeding the threshold value, or the end and start of demand control being repeated in a short time.

  Incidentally, some refrigerators that are the thermal environment adjusting device 2 have a defrosting function. This type of defrosting function is usually realized by stopping the compressor of the refrigerator or heating the portion where the frost has adhered at the same time as stopping the compressor. When the refrigerator performs an operation (defrosting operation) for realizing the defrosting function, the power consumption is reduced by stopping the compressor, so that the demand control for other environmental adjustment devices can be terminated. However, in practice, after the defrosting operation is completed, a large amount of electric power is consumed to cool again the target area (freezer, etc.) that has been warmed by the defrosting operation. Therefore, it is necessary to determine the end of demand control for the environmental adjustment device in consideration of the power consumption that increases after the defrosting operation of the refrigerator.

  FIG. 5 is a flowchart for explaining the operation when the defrosting operation of the refrigerator is taken into consideration. However, the processing from step S1 to S10 is the same as the basic operation shown in FIG.

  When the thermal environment data At at time t is less than or equal to the reference value and the thermal environment data At is in a decreasing trend, the control unit 10 is expected to reduce the number of refrigerators in the history database stored in the first storage unit 14. Referring to the electric power, after the refrigerator finishes the defrosting operation, the increment ΔD in which the power consumption of the refrigerator increases is estimated (step S14), and the sum of the estimated increment ΔD and the current power consumption Et is a threshold value. (Step S15). When the sum of the increment ΔD and the current power consumption Et exceeds the threshold, the control unit 10 does not end the demand control for the other environmental adjustment devices, but the sum of the increment ΔD and the current power consumption Et. When the value is equal to or less than the threshold value, a refrigerator capable of defrosting operation is determined, a control command for causing the refrigerator to start the defrosting operation is generated, and transmitted from the device communication unit 12 to the refrigerator. (Step S16), and by adding the increment ΔD when the refrigerator has finished the defrosting operation to the current power consumption Et, the demand control of other environmental adjustment devices is prevented from ending (step S17). ). Further, the control unit 10 refers to the control / return database stored in the second storage unit 15 and is expected to increase when the environmental adjustment device whose current state is “in control” is returned to normal operation. The sum of power (= expected power reduction) is calculated (step S18), and power (recovery power) Ft that is expected to increase upon return and current power consumption (actually, increment D is added to current power consumption) It is determined whether or not the sum of the values is below a threshold value (step S19). When the threshold value is exceeded, the control unit 10 does not return any environmental adjustment device. However, when the threshold value is less than the threshold value, the control unit 10 subtracts the sum of the return power Ft and the current power consumption from the threshold value. Demand control so that the expected reduction power does not exceed the value ΔFt from among the environmental adjustment devices under demand control by referring to the control / return database stored in the second storage unit 15 The environmental adjustment device for ending is determined (step S20). The control unit 10 generates a control command for ending demand control of the one or more environmental adjustment devices determined as described above and returning to normal operation, and sends the control command from the device communication unit 12 to the environmental adjustment device. To send to. Then, the environmental adjustment device that has received the control command from the demand control device 1 returns to normal operation.

  By the way, the thermal environment adjusting device 2 accumulates (stores) heat (hot water or ice) generated by late-night power, and dissipates the heat stored during the daytime when demand power increases, thereby reducing power consumption. However, it may include a heat storage type air conditioner or a refrigerator that can be adjusted to a desired thermal environment. Next, with reference to the flowchart of FIG. 6, operation | movement in the case of providing the thermal storage type | mold thermal environment adjustment apparatus 2 (for example, thermal storage type air conditioner) is demonstrated. However, the processing in steps S1 to S4 and S8 to S12 is common to the basic operation shown in FIG.

  When the control unit 10 determines that the thermal environment data At exceeds the reference value (step S3) and the thermal environment data At tends to increase (step S4), the demand power may exceed the threshold value. Therefore, it is determined by referring to the control / return database whether or not the heat storage type air conditioner has already shifted to the heat radiation operation (step S21). A control command for shifting to operation is generated and transmitted from the device communication unit 12 to the heat storage type air conditioner (step S22). And the heat storage type air conditioner which received the control command from the demand control apparatus 1 shifts from the normal operation to the heat radiation operation.

  Subsequently, the control unit 10 obtains a difference ΔAt between the current thermal environment data At and the reference value as a variation value of the thermal environment (step S23), and the history database stored in the first storage unit 14 is obtained. The amount of increase in power consumption corresponding to the fluctuation value ΔAt is referred to (step S24), and further, the increase estimated by the estimated reduction power with reference to the control / return database stored in the second storage unit 15 A new environmental adjustment device for demand control is determined so as to be equal to or greater than the amount (step S25). The control unit 10 generates a control command for demand-controlling one or more environmental adjustment devices additionally determined as described above, and causes the device communication unit 12 to transmit the control commands to the environmental adjustment device.

  Finally, the operation in the case of providing an outdoor lighting fixture controlled by a timer as the lighting device 3 will be described with reference to the flowchart of FIG. However, the processing in steps S1 to S10 is common to the basic operation shown in FIG.

  When the thermal environment data At at time t is less than or equal to the reference value (step S3) and the thermal environment data At tends to decrease (step S10), the control unit 10 turns on (lights up) the outdoor lighting fixture by timer control. (Step S26), if it is not turned on, the control / return database stored in the second storage unit 15 is referred to, and the current state is “in control”. The sum total of power consumption (= reduction expected power) that is expected to increase when the device returns to normal operation is calculated (step S27). Then, the control unit 10 determines whether or not the sum of the power (recovery power) Ft expected to increase upon return and the current power consumption is below the threshold value (step S28), and exceeds the threshold value. In this case, none of the environmental adjustment devices are returned, but when the value is lower than the threshold value, a value ΔFt obtained by subtracting the sum of the return power Ft and the current power consumption is obtained from the threshold value and stored in the second storage unit 15. With reference to the stored control / return database, an environmental adjustment device that terminates the demand control is determined from among the environmental adjustment devices that are under demand control so that the expected power reduction does not exceed the value ΔFt (step S29). The control unit 10 generates a control command for ending demand control of the one or more environmental adjustment devices determined as described above and returning to normal operation, and sends the control command from the device communication unit 12 to the environmental adjustment device. To send to. Then, the environmental adjustment device that has received the control command from the demand control device 1 returns to normal operation.

  On the other hand, when it is time to turn on the outdoor lighting fixture by the timer control, the control unit 10 refers to the estimated reduction power of the history database stored in the first storage unit 14, and the outdoor lighting fixture is turned on. In this case, the power consumption increment is estimated (step S30), and the sum of the estimated power consumption and the current power consumption is compared with a threshold value (step S31). The outdoor lighting fixture is immediately turned on (lighted) (step S31). However, when the sum of the estimated increment and the current power consumption exceeds the threshold value, the control unit 10 changes the time of the timer control so as to delay, for example, a predetermined time (step S32). .

It is a system configuration figure showing an embodiment of the present invention. It is explanatory drawing of the history database in the same as the above. It is explanatory drawing of the control and return database in the same as the above. It is a flowchart for operation | movement description same as the above. It is a flowchart for operation | movement description in the case of including the defrost operation of a refrigerator same as the above. It is a flowchart for operation | movement explanation in case a thermal storage type thermal environment adjustment apparatus same as the above is included. It is a flowchart for operation | movement description in the case of including the outdoor lighting fixture controlled by a timer same as the above.

Explanation of symbols

1 Demand control device 2 Thermal environment adjustment equipment (environment adjustment equipment)
3 Lighting equipment (environmental adjustment equipment)
4 Environmental measurement device 5 Electric power measurement device 10 Control unit (control means)
13 Demand prediction unit (prediction means)
14 1st memory | storage part (1st memory | storage means)
15 Second storage section (second storage means)

Claims (5)

Based on multiple environmental adjustment devices that adjust the indoor environment, an environmental measurement device that measures the outdoor environment, a power measurement device that measures the power consumed by the environmental adjustment device, and the power measured by the power measurement device A demand control device that predicts demand power and demand-controls environmental adjustment equipment so that the demand power does not exceed a predetermined threshold;
The demand control device performs demand control on a plurality of environmental adjustment devices and first storage means for storing the measurement value of the environmental measurement device and the power measured by the power measurement device in association with the measured time. Priority, the current demand control status, the second storage means for storing the expected power expected to be reduced by demand control for each of the plurality of environmental adjustment devices, and the power measured by the power measuring device Demand control for one of the environmental adjustment devices is performed according to the priority stored in the second storage unit when the predicted value of the power demand is predicted and the predicted value of the prediction unit exceeds a predetermined threshold Control means for
The control means is configured such that the sum of the expected power of the environmental adjustment device executing the demand control and the power measured by the power measurement device is less than the threshold value, and the measurement value of the environmental measurement device is the environmental adjustment device. A demand control system, characterized in that demand control for the environmental adjustment device is terminated when the direction of power consumption is reduced.   A refrigerator with a defrosting function is provided as an environmental adjustment device, and the control means of the demand control device measures the increase in power when the refrigerator performing the demand control uses the defrosting function and the power measuring device. The defrosting function is used by the refrigerator when the sum of the electric power to be generated is less than the threshold value and the measured value of the environment measuring device is changing in a direction to reduce the electric power consumed by the refrigerator. The demand control system according to claim 1.   A heat storage type thermal environment adjusting device is provided as the environment adjusting device, and the control means of the demand control device is configured to change the air conditioning device when the measured value of the environment measuring device changes in a direction to increase the power consumed by the air conditioning device. The demand control system according to claim 1, wherein the energy stored in the heat is utilized.   An outdoor lighting device that has a timer function to be turned on / off at a predetermined time and illuminates the outdoors is provided, and the control unit of the demand control device is configured to increase the power when the outdoor lighting device is turned on by the timer function. And the outdoor lighting device when the sum of the power measured by the power measuring device is less than the threshold value and the measured value of the environmental measuring device is changing to reduce the power consumed by the environmental adjusting device The demand control system according to claim 1, wherein a timer function is used.   5. The demand control system according to claim 4, wherein the control means of the demand control device corrects the lighting time in the timer function when the outdoor lighting device does not use the timer function.

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