JP2017028764A - Demand power control apparatus and demand power control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a demand power control apparatus and a demand power control method which are capable of achieving peak cutting and peak shifting of electric power.SOLUTION: A demand power control apparatus controls an air-conditioning heat source installation device having: a heat storage tank for retaining produced cold water; and an air conditioner for supplying air to a power generator with temperature having lowered by the cold water retained in the heat storage tank, the power generator having characteristics in which the output power thereof increases as the temperature of air supplied thereto decreases. The demand power control apparatus includes a power control part. On the day before a target day of controlling the air-conditioning heat source installation device, the power control part calculates a target supply air temperature of air supplied from the air conditioner according to a prediction value of demand power on the target day, and holds the cold water in the heat storage tank at the temperature of the cold water corresponding to the calculated target supply air temperature. Further, on the target day, the power control part supplies the cooled air from the air conditioner to the power generator according to the target supply air temperature, and makes the power generator operate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a demand power control apparatus and a demand power control method.

  In recent years, the consumer side has been equipped with power supply equipment so that the purchased power (demand power) supplied by the power supplier (hereinafter referred to as the power company) to the consumer does not exceed the contracted power that is the target value. An operation management device is prepared to supply power to load devices such as work equipment. Here, a power supply device is comprised from the 1st generator using solar energy etc., the 2nd generator containing a gas turbine generator, a storage battery, and a power purchase power source. The load device is composed of air conditioning heat source equipment and work equipment.

  The operation management device allocates power supply power by the power supply device so that the purchased power becomes contract power based on the predicted power load value of the load device. For example, when the predicted power load exceeds the contracted power, the operation management device allocates power so that the maximum purchased power is kept below the contracted power and the shortage is compensated by the power from the power supply equipment. I do.

JP 2003-206752 A

However, since the gas turbine generator constituting the second generator has the characteristics described below, there is a problem that peak cut may be required when the output is lower than the expected output. . Note that the peak cut means that the purchased power does not exceed the contract power when it is determined that the purchased power exceeds the contract power.
FIG. 4 is a diagram illustrating characteristics of the gas turbine generator. As shown in this figure, the gas turbine generator has a characteristic that when the outside air temperature rises, the supply air temperature when supplying the outside air also rises, so the output decreases, and the power generation amount decreases accordingly. There is. In other words, when the maximum value of purchased power is kept below the contracted power using a gas turbine generator, and when the shortage is compensated with the power from the gas turbine generator, it is insufficient when the outside air temperature is higher than the expected temperature. In some cases, it may be determined that the purchased power exceeds the contracted power because the amount cannot be compensated.

  The present invention has been made in view of the above points, and the main object is to achieve a peak cut and a peak shift by obtaining a necessary power generation amount even when the outside air temperature rises. An object is to provide a demand power control apparatus and a demand power control method.

  In order to solve the above-described problems, the power demand control apparatus of the present invention has a heat storage tank that holds the produced cold water and a characteristic that the generator output increases as the temperature of the supplied air decreases. An air-conditioning heat source equipment device for controlling an air-conditioning heat source facility device having an air conditioner for lowering a temperature of supply air supplied to the generator by cold water held in the heat storage tank with respect to the generator, the air-conditioning heat source On the day before the target date for controlling the equipment, the target supply temperature of the air supplied by the air conditioner is calculated according to the predicted value of the demand power on the target date, and the target supply temperature corresponds to the calculated target supply temperature Electric power that causes the heat storage tank to hold the cold water at a temperature of cold water, and on the target day, supplies the air cooled according to the target supply air temperature from the air conditioner to the generator to operate the generator. Characterized in that it comprises a control unit.

  In order to solve the above-described problems, the power demand control method of the present invention has a heat storage tank that holds the produced cold water and a characteristic that the generator output increases as the temperature of the supplied air decreases. A power demand control method for a power demand control apparatus for controlling an air conditioning heat source equipment having an air conditioner for lowering a temperature of supply air supplied to the power generator by cold water held in the heat storage tank. The power control unit calculates a target supply temperature of air supplied by the air conditioner according to a predicted value of demand power on the target day on the day before the target day for controlling the air conditioning heat source equipment. The cold water is held in the heat storage tank at a temperature of the cold water corresponding to the calculated target supply air temperature, and air cooled according to the target supply air temperature is supplied from the air conditioner to the generator on the target day. To operate the generator, characterized in that.

  According to the present invention, the supply air temperature to the generator is lowered by cold water corresponding to the predicted electric power predicted, and the peak cut on the day of the control target day on which the purchased electric power is determined to exceed the contract electric power is realized. To do. Further, the production time of the cold water for lowering the supply air temperature is shifted to a time when the purchased power before the day of the control target date for operating the generator does not exceed the contract power. Thereby, even if cold air is supplied to the generator, it is possible to provide a demand power control apparatus and a demand power control method capable of realizing peak cut and peak shift.

It is a schematic block diagram which shows the structural example of the demand power control apparatus of this embodiment. It is a flowchart which shows the process of the demand power control apparatus of this embodiment. It is a schematic block diagram which shows an example of the smart grid system which can utilize the demand power control apparatus of this embodiment. It is a figure which shows the characteristic of a gas turbine generator.

FIG. 1 is a schematic block diagram illustrating a configuration example of the demand power control apparatus of the present embodiment.
As shown in FIG. 1, since the gas turbine generator 620 that is a power supply device supplies power to the load device, the demand power control device 80 determines the supply air temperature that the air conditioning heat source facility device 30 gives to the gas turbine generator 620. The air conditioning heat source equipment 30 is controlled to lower. The gas turbine generator 620 (generator) has a characteristic that the generator output increases (decreases) as the temperature of supplied air decreases (rises) (see FIG. 4).
The refrigerator 310 produces cold water having a cold water temperature necessary for the supply temperature of the air supplied from the fan 332 to the gas turbine generator 620. The heat storage tank 343 holds the cold water produced by the refrigerator 310. The heat exchanger 331 of the air conditioner 330 cools the outside air with the cold water supplied from the heat storage tank 343, and supplies the cooled air to the fan 332 of the air conditioner 330. The fan 332 of the air conditioner 330 supplies the cooled air to the gas turbine generator 620.

A demand power control apparatus 80 shown in FIG. 1 includes a target value storage unit 801, a demand power profile prediction unit 802, a target excess power calculation unit 803, a water heat storage amount calculation unit 804, a power control unit 805, and a cold water supply. A determination unit 807 and a supply air temperature securing unit 808 are provided.
In the target value storage unit 801, the target value of the demand power (maximum demand power) that becomes the maximum among the actual values of the demand power measured for each of a plurality of predetermined measurement periods (demand time limit, for example, 30 minutes). A certain target power (i) is predetermined and stored. That is, the contract power (demand target value C) is stored. The target value storage unit 801 stores target power (i) (i = 1 to 48) on the target date for controlling the air conditioning heat source equipment 30.
The demand power profile prediction unit 802 predicts the demand power in the measurement target period at a time before starting the measurement of the actual value in the measurement target period that is the measurement target of the actual value among a plurality of continuous measurement periods. (Predicted power) value is calculated. Here, the measurement target period is a period of one day on the target day, and a predicted value of average demand power in 30 minutes which is a demand time limit is calculated. That is, since the demand time limit is 30 minutes, the calculation process of the predicted value by the predicted value calculation unit 83 is performed in the calculation process corresponding to 48 times per day on the target day, for example, in the evening on the day before the control target day. Then, the predicted power (i) for each demand time period (i) (i = 1 to 48) is calculated.
Here, as a calculation method of a predicted value, a method using a neural network model as shown in a patent document (Japanese Patent Laid-Open No. 2006-78009), a method using a Kalman filter, a method using a least square method, and the like. Can be applied. For example, when ANN is used, accuracy can be improved by using weather forecast data or the like. For example, the weather forecast data is downloaded at every preset time by connecting to a server on the Internet that stores weather forecast information published by the Japan Meteorological Agency. The downloaded weather forecast information is stored in a storage unit of an operation management device including the demand power control device 80 as weather forecast data in association with the time zone of the day.

  The excess target power calculation unit 803 calculates the difference between the predicted power (i) calculated by the demand power profile prediction unit 802 and the target power (i) stored in the target value storage unit 801. The difference calculated by the target excess power calculation unit 803 is a DR required amount that indicates the amount of demand power that needs to be reduced by power control processing (DR (demand response) processing) on the target date. The target excess power calculation unit 803 determines whether the predicted power (i) exceeds the target power (i).

The water heat storage amount calculation unit 804 performs water heat storage amount calculation in order to lower the supply air temperature given to the gas turbine generator 620.
The water heat storage amount calculation unit 804 calculates the difference between the predicted outside air temperature and the target supply air temperature when “predicted power (i) −target power (i)” calculated by the target excess power calculation unit 803 is maximum. To do. The outside air temperature predicted value is the outside air temperature at the time of the predicted power (i), and is given as weather forecast data. The target supply air temperature is the outside air temperature corresponding to the generator output when the gas turbine generator 620 realizes the target power (i).
For example, as shown in the characteristics of the gas turbine generator in FIG. 4, when 220 MW is required as the generator output of the gas turbine generator 620, the target power (i) cannot be achieved unless the target supply air temperature is 30 ° C. . However, when the predicted outside air temperature is 35 ° C., the gas turbine generator 620 can output only 215 MW as the generator output. Therefore, the water heat storage amount calculation unit 804 calculates 5 ° C. that is the difference between the predicted outside air temperature value 35 ° C. and the target supply air temperature 30 ° C.
If the water heat storage amount calculation unit 804 knows the difference between the predicted outside air temperature and the target supply air temperature, the air volume used in the gas turbine generator 620 is determined by the rating, so the estimated outside air temperature value and the target supply air temperature It is possible to calculate the amount of water stored (the temperature of the cold water) that cools the difference air.
The refrigerator 310 manufactures a certain amount of water at the temperature of the cold water calculated by the water heat storage amount calculation unit 804 and holds it in the heat storage tank 343 at, for example, the night before the control target date. The power control unit 805 transmits a control signal for operating the refrigerator 310 at a temperature corresponding to the water heat storage amount (cold water temperature) calculated by the water heat storage amount calculation unit 804, and the water heat storage amount calculation unit is supplied to the heat storage tank 343. The cold water is held at the temperature of the cold water calculated by 804.
That is, the power control unit 805 calculates the target supply temperature of the air that the air conditioner 330 supplies to the gas turbine generator 620 according to the predicted value of the demand power, and corresponds to the calculated target supply temperature. The cold water is held in the heat storage tank 343 at the temperature of the cold water.

The meteorological data measurement unit 806 is a thermometer that is disposed, for example, in the vicinity of the gas turbine generator 620 and measures the outside air temperature of the gas turbine generator 620.
The cold water supply determination unit 807 determines whether or not the target supply air temperature is lower than the outside air temperature measured by the weather data measurement unit 806.
The supply air temperature securing unit 808 turns on a control signal that instructs to operate the air conditioner 330 when the target supply air temperature is lower than the outside air temperature in the determination result by the cold water supply determination unit 807.
Here, the power control unit 805 controls the heat exchanger 331 of the air conditioner 330 according to the control signal that is turned on, and cools the outside air with cold water supplied from the heat storage tank 343. In addition, the power control unit 805 performs control to supply the cooled air to the gas turbine generator 620 from the fan 332 of the air conditioner 330. That is, the power control unit 805 controls the air conditioner 330 that supplies air to the gas turbine generator 620 with the cold water held in the heat storage tank 343, and operates the gas turbine generator 620 according to the target supply air temperature. .
Thus, the power demand control device 80 controls the air conditioning heat source equipment 30 so as to lower the supply air temperature that the air conditioning heat source equipment 30 gives to the gas turbine generator 620 in order to supply the target power in each demand time period. It becomes possible to do.
That is, when information indicating an execution instruction for real-time DR is input from the operation management device, the power control unit 805 starts the demand time period based on the predicted value calculated before the demand time period (the day before the control target day) ( It is possible to start the DR process simultaneously with the (control target date).

Then, with reference to FIG. 2, the operation example of the demand power control apparatus 80 is demonstrated. FIG. 2 is a flowchart showing processing of the demand power control apparatus of the present embodiment.
In FIG. 2, FIG. 2 (a) shows processing on the day before the control target date, and FIG. 2 (b) shows processing on the day of the control target date.
The demand power profile prediction unit 802 predicts a predicted power profile by the ANN or the like at a time point (for example, the day before the control target day) before the time point when the demand time period (for example, the current day of the control target day) is started (step). S81). The demand power profile prediction unit 802 calculates a predicted value of average demand power during the demand time limit on the day of control target.
The target excess power calculation unit 803 is the difference between the predicted power (i) calculated by the demand power profile prediction unit 802 and the target power (i) stored in the target value storage unit 801 “predicted power (i)”. -Target power (i) "is calculated (step S82).
Then, the target excess power calculation unit 803 determines whether or not the predicted power (i) exceeds the target power (i) (step S83). Here, if the target excess power calculation unit 803 determines that the predicted power (i) does not exceed the target power (i) (step S83—NO), the power control unit 805 executes the control process of the refrigerator 310. do not do.

On the other hand, if the target excess power calculation unit 803 determines in step S83 that the predicted power (i) exceeds the target power (i) (step S83—YES), the water heat storage amount calculation unit 804 The temperature of the cold water for performing the heat storage operation is calculated (step S84).
The power control unit 805 controls the refrigerator 310 to produce a certain amount of water at the temperature of the cold water calculated by the water heat storage amount calculation unit 804 at, for example, the night before the control target date, Hold in the tank 343. That is, the peak shift can be realized by performing the cold water load prediction required on the day before the control target day.

On the day of the control target day, the meteorological data measurement unit 806 performs outside air temperature measurement (step S91). This measurement process is executed for each demand period in the real-time DR process.
The cold water supply determination unit 807 determines whether or not the target supply air temperature is lower than the outside air temperature (step S92). If the cold water supply determination unit 807 determines that the target supply air temperature is lower than the outside air temperature measured by the meteorological data measurement unit 806 (step S92—YES), the supply air temperature securing unit 808 supplies cold water from the heat storage tank. Then, a control signal instructing to lower the supply air temperature by the heat exchanger is output to the power control unit 805 (step S93).
The power control unit 805 controls the heat exchanger 331 of the air conditioner 330 according to a control signal output from the supply air temperature securing unit 808, and cools the outside air with cold water supplied from the heat storage tank 343. In addition, the power control unit 805 performs control to supply air cooled to the target supply air temperature to the gas turbine generator 620 from the fan 332 of the air conditioner 330.
The power control unit 805 secures the target amount power generation (step S94) and secures the target peak power (step S95).
That is, the target power (i) can be achieved by lowering the supply air temperature to the gas turbine generator 620 to a target supply air temperature lower than the outside air temperature. That is, in the DR process, since it is determined that the purchased power exceeds the contracted power, the supply air temperature is lowered by the heat exchanger 331, and the peak cut is performed.
On the other hand, if the cold water supply determination unit 807 determines that the target supply air temperature is equal to or higher than the outside air temperature measured by the weather data measurement unit 806 (step S92-NO), the power control unit 805 causes the heat exchanger 331 to Control is performed to supply air at the outside temperature to the gas turbine generator 620 without cooling the outside air with the cold water supplied from the heat storage tank 343. That is, in this case, the DR process is executed in a state where the purchased power does not exceed the contract power.

  As described above, according to the demand power control device 80 of the present embodiment, the supply air temperature exceeds the contract power by lowering the supply temperature to the gas turbine generator 620 with cold water corresponding to the predicted power predicted. The peak cut on the day of the control target date that is judged to be present is realized. In addition, the production time of the cold water for lowering the supply air temperature is shifted to a time when the purchased power before the day of the control target date for operating the gas turbine generator 620 does not exceed the contract power. Thereby, the demand power control apparatus and demand power control method which can implement | achieve a peak cut and a peak shift can be provided.

FIG. 3 is a schematic block diagram illustrating an example of a smart grid system that can use the power demand control apparatus of the present embodiment. As shown in FIG. 1, the smart grid system includes an operation management device 1, an air conditioning heat source facility device 3, a work facility device 4, a power supply device 6, a power supply output control device 7, and a load power control device 8. .
This smart grid system includes, for example, an air conditioning heat source equipment 3 and a work equipment 4 as load devices. In addition, since the air-conditioning heat-source equipment 3 is provided with the heat source, the fluctuation of power consumption is large compared with the work-equipment equipment 4, and the power consumption tends to fluctuate according to the weather and indoor usage environment.

The air conditioning heat source equipment 3 (corresponding to the air conditioning heat source equipment 30 shown in FIG. 1) includes an air conditioning heat source machine 31 (corresponding to the refrigerator 310), an external air conditioner 32, and an air conditioner 33 (corresponding to the air conditioner 330). A thermal circulation mechanism 34 and a package air conditioner 35. Among the air conditioning heat source equipment 3, the air conditioning heat source unit 31, the external air conditioner 32, and the air conditioner 33 adjust the temperature of the medium (for example, water) that circulates through the thermal circulation mechanism 34, for example, each room. It is the equipment which adjusts the indoor temperature via the air conditioner 33 installed in the. The air conditioning heat source equipment 3 uses the heat circulation mechanism 34 to provide the external air conditioner 32 and the air conditioner 33 with the amount of heat required by the load device.
This heat circulation mechanism 34 is, for example, a pipe 341 that is stretched around each room and filled with a medium (liquid or gas) that retains the amount of heat given by the air conditioning heat source unit 31, a pump 342 that circulates this medium, It includes a heat storage tank 343 that stores a medium that holds the amount of heat.
The air conditioning heat source unit 31 includes, for example, a heat pump, a gene link, and the like, and performs a heating process for increasing the temperature of the medium filled in the pipe 341 and a cooling process for decreasing the temperature of the medium.
The outside air conditioner 32 takes in outside air and adjusts the outside air temperature to some extent according to the room temperature.
The air conditioner 33 uses the temperature of the medium heat-treated or cooled by the air-conditioning heat source device 31 to adjust the outside air taken in by the external air conditioner 32 according to the room temperature.
The package air conditioner 35 adjusts the outside air taken in by the external air conditioner 32 according to the room temperature without using the temperature of the medium heated and cooled by the air conditioning heat source device 31.
Note that a dedicated refrigerator, a heat storage tank, and an air conditioner may be provided for the gas turbine generator 620.

The work equipment 4 includes a PC (Personal Computer) 41, a lighting device 42, and an OA (Office Automation) device 43.
The PC 41, the lighting device 42, and the OA device 43 are work facility devices that are often installed in buildings such as offices, and are examples of the work facility device 4.

In addition, the smart grid system includes a first generator 61, a second generator 62, a storage battery 63, and a power purchase power supply 64 as power supply devices 6 that supply power to these load devices.
The first generator 61 generates electric power by private power generation using wind energy, solar energy, or the like. Since the power generation energy of the first generator 61 depends on the weather, the output power is not constant.
The second generator 62 is a generator such as a gas engine generator or a gas turbine generator (corresponding to the gas turbine generator 620). Since the second generator 62 does not use the power generation energy that depends on the weather, the output power can be adjusted.
The storage battery 63 stores the generated power generated by the first generator 61 and the second generator 62 and the purchased power output from the purchased power source 64.
The power purchase power supply 64 outputs, for example, the power purchased by the user from the power company (power purchase power).
Regarding power purchase from this power company, the contract power C [kw] is determined according to the user, and the average power used for a predetermined time (demand time limit) exceeds the contract power C. In such a case, an additional fee such as a penalty is imposed on the payment fee determined in advance according to the contract power C. Here, the contract power may be hereinafter referred to as a demand target value C. Hereinafter, the predetermined fixed time corresponds to a demand time period, and is a fixed time arbitrarily determined, for example, 30 minutes.

The operation management apparatus 1 manages the air conditioning heat source operation plan and the power supply facility operation plan.
This air conditioning heat source operation plan is a plan in which the thermal load required by the load device corresponding to the air conditioning heat source is allocated for each demand time period and this allocation is shown for each time. The air-conditioning heat source operation plan is, for example, a load device corresponding to an air-conditioning heat source predicted in each time zone of the day in order to supply an amount of heat expected to adjust the temperature to a preset temperature predetermined on the prediction date. Indicates the amount of heat dissipated and the amount of heat stored in the heat storage tank.
The power supply facility operation plan is a plan showing allocation of power sources (generated power and purchased power) to be supplied to all load devices at each time. This power supply facility operation plan is based on the predicted power load expected to be fed from the power supply device 6 for each power output (first generator 61, second generator 62, and storage battery included in the power supply device 6). 63 and the schedule of operation for each purchased power source 64). For example, the power supply facility operation plan indicates the power required for the power supply device 6 to operate every predetermined time (demand time limit) in order to supply the supply power predicted in each time zone of the day.

The operation management device 1 inputs in advance various information for optimal operation control of the air conditioning heat source equipment 3, work equipment 4, and power supply equipment 6, and based on the information, air conditioning heat load prediction processing and power generation output prediction. Process. In this air conditioning thermal load prediction process, a process of calculating the amount of heat (air conditioning thermal load) predicted to be necessary to adjust the temperature to a predetermined set temperature is performed. In the power generation output prediction process, a process of calculating power predicted to be generated by the first generator 61 and the second generator 62 is performed.
The operation management device 1 performs an operation plan creation process based on the results of the air conditioning thermal load prediction process and the power generation output prediction process. The operation plan creation unit 105 creates an air-conditioning heat source operation plan according to the predicted air-conditioning heat load based on these prediction results, and from the purchased power source 64 according to the predicted air-conditioning heat load. Indicates the power load of each power source (the first generator 61, the second generator 62, the storage battery 63, and the purchased power source 64) of the power source device 6 at which the purchased power becomes an arbitrary target value (for example, the minimum value). Create a power plant operation plan.
The basic process of the operation management apparatus 1 is to collect a variety of information and create an air conditioning heat load prediction process and a power generation output prediction process, and a process step 1 to create an air conditioning heat source operation plan and a power supply facility operation plan based on the results. This is two processing steps, that is, a process step 2 for performing an operation plan creation process.
In addition to these two processing steps, the operation management apparatus 1 according to the present embodiment performs a process for executing the plan DR and a process for executing the real-time DR according to circumstances.

The power output control device 7 supplies power from the power supply device 6 to the air conditioning heat source equipment device 3 and the work equipment device 4 that are load devices based on the operation plan, plan DR, and real-time DR processing by the operation management device 1. While specifying the source (the 1st generator 61, the 2nd generator 62, the storage battery 63, the power purchase power supply 64), the electric power which this electric power source outputs, and its timing are controlled. Specifically, the power output control device 7 controls the power output from the first generator 61, the second generator 62, and the storage battery 63 in the power source. Note that the power output from the power purchase power supply 64 is the power output from the first generator 61, the second generator 62, and the storage battery 63 in response to the demand of the load device (the air conditioning heat source equipment 3 and the work equipment 4). Then there is insufficient power.
The load power control device 8 (corresponding to the demand power control device 80) controls the operation of the air conditioning heat source equipment 3 and the work equipment 4 based on the operation plan, plan DR, and real-time DR processing by the operation management device 1.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  DESCRIPTION OF SYMBOLS 30 ... Air-conditioning heat-source equipment apparatus, 80 ... Demand electric power control apparatus, 310 ... Refrigerator, 330 ... Air conditioner, 331 ... Heat exchanger, 332 ... Fan, 343 ... Thermal storage tank, 620 ... Gas turbine generator, 801 ... Target value Storage unit 802 ... Demand power profile prediction unit 803 ... Target excess power calculation unit 804 ... Water heat storage amount calculation unit 805 ... Power control unit 806 ... Meteorological data measurement unit 807 ... Cold water supply determination unit 808 ... Supply Air temperature securing section

Claims (2)

For the heat storage tank that holds the produced cold water and the generator that has the property that the generator output increases as the temperature of the supplied air decreases, the cold water held by the heat storage tank causes the generator to A power demand control device for controlling an air conditioning heat source equipment having an air conditioner for lowering a temperature of supplied air,
On the day before the target date for controlling the air conditioning heat source equipment, the target supply temperature of the air supplied by the air conditioner is calculated according to the predicted value of power demand on the target date, and the calculated target supply temperature is set. Holding the cold water in the heat storage tank at the corresponding cold water temperature,
On the target date, air cooled according to the target supply air temperature is supplied from the air conditioner to the generator, and the generator is operated.
A power demand control device comprising a power control unit. For the heat storage tank that holds the produced cold water and the generator that has the property that the generator output increases as the temperature of the supplied air decreases, the cold water held by the heat storage tank causes the generator to A demand power control method for a demand power control device for controlling an air conditioning heat source equipment having an air conditioner for lowering a temperature of supplied air,
The power control unit calculates the target supply temperature of the air supplied by the air conditioner according to the predicted value of the demand power on the target day on the day before the target day for controlling the air conditioning heat source equipment. Holding the cold water in the heat storage tank at a temperature of the cold water corresponding to a target supply air temperature;
On the target date, air cooled according to the target supply air temperature is supplied from the air conditioner to the generator, and the generator is operated.
A demand power control method for a demand power control apparatus.

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