JP6423246B2 - Supply and demand management device - Google Patents

Description

  The present invention relates to a supply and demand management apparatus that manages power supply and demand.

  2. Description of the Related Art A supply and demand management device that manages power supply and demand in a customer area that is a management target area is known. In addition, as a consumer area | region, the area | region which uses one building, the area | region which makes several units one unit, the area | region which makes a certain area a unit, etc. are mentioned, for example.

There is a supply and demand management system that includes such a supply and demand management device as a lower-order supply and demand management device and also includes an upper-order supply and demand management device that instructs a power management target to the lower-order supply and demand management device.
The supply and demand management system manages the supply and demand of power supplied from the power plant to the consumer area (general housing, commercial buildings, factories, the entire region including these, etc.).

  The supply and demand management system includes the supply and demand management system for general housing (HEMS), the supply and demand management system for commercial buildings (BEMS), the supply and demand management system for factories (FEMS), and HEMS / BEMS / FEMS, depending on the type of customer area. It can be classified into the supply and demand management system (CEMS) for the entire region.

  For example, in a supply and demand management system that manages the power supply and demand of one building or a plurality of buildings, the upper demand and supply management device sends “from time A to the lower demand and supply management device that manages one building or each building. A demand response command (hereinafter also referred to as a DR command) such as “Reduce power to be used by C [kW] until time B” is output. Based on this DR command, the lower-level supply and demand management device manages the power supply and demand in the entire consumer area (one building or a plurality of buildings) that is a management target area (see, for example, Patent Document 1).

  This DR command is used to prevent the power consumption in the consumer area from exceeding the power generation capacity of the power plant when the power consumption in the consumer area is predicted to increase, such as during the daytime in summer. It is output for the purpose of avoiding it.

  In addition, the DR command is used for the purpose of reducing the power cost in the consumer area by reducing the power consumption in the time zone where the power generation cost is high and increasing the power consumption in the time zone where the power generation cost is low. Is also possible.

JP 2008-295193 A

By the way, as a power plant, in addition to the conventionally used thermal power plant, nuclear power plant, and hydroelectric power plant, a solar power plant and a wind power plant are also being installed.
The power generated by these multiple types of power plants is transmitted from each power plant to the customer area through a common power transmission system. In the customer area, the power supplied from any type of power station Electricity was consumed without being distinguished.

  For customers, not only those that prioritize low costs, but also, for example, electric power generated by clean energy that does not emit carbon dioxide, nuclear fuel waste, etc. (hydropower plants, solar power plants, wind power plants) Some customers prioritize the use of

  However, while the characteristics of the power supplied (such as the type of power plant) increase and the demands of customers are diversifying, they are supplied when managing the supply and demand of power in the consumer area. Electricity characteristics (such as type of power plant) were not considered.

  In addition, the above supply and demand management device (lower supply and demand management device) is configured to manage the power supply and demand in the entire consumer area that is the management target area based on the DR command from the upper supply and demand management device. It was not configured to manage power supply and demand by determining the characteristics of the power supplied from the power plant (such as the type of power plant).

  Therefore, the present invention manages the power supply and demand by determining the characteristics of the supplied power (such as the type of power plant) by itself when managing the power supply and demand in the customer area that receives power supply from a plurality of power plants. An object of the present invention is to provide a supply and demand management device.

  A supply and demand management apparatus according to a first aspect of the present invention is a supply and demand management apparatus that manages a power consumption state in a consumer area that consumes electric power supplied from a plurality of power plants by at least one electric load. A characteristic index calculation unit, a command value calculation unit, and a load control unit are provided.

  The power characteristic index calculation unit calculates a power characteristic index indicating the characteristics of power supplied from the plurality of power plants to the consumer area, using the individual power plant indexes indicating the characteristics of the plurality of power plants. The command value calculation unit calculates a command value including at least an allowable value of power consumption at the electric load using at least a power characteristic index. The load control unit controls the electric load so that the power consumption at the electric load is equal to or less than an allowable value.

  In this supply and demand management apparatus, since the power characteristic index is calculated using the individual power plant index, the characteristic of the power supplied to the consumer area can be determined. In this supply and demand management device, a command value including at least an allowable value of the electric power consumption at the electric load is calculated based on at least the electric power characteristic index so that the electric power consumption at the electric load is less than the allowable value. By controlling the electrical load, it is possible to change the power consumption state in the consumer area according to the characteristics of the power supplied from the plurality of power plants to the consumer area.

  Thereby, it becomes possible to set a command value according to the characteristics of the power supplied to the consumer area, and it is possible to realize a power consumption state according to the characteristics of the supplied power (such as the type of power plant).

  Therefore, according to this supply and demand management device, when managing power supply and demand in a customer area that receives power supply from a plurality of power plants, the characteristics of the supplied power (such as the type of power plant) are determined by themselves. The power supply and demand can be managed.

  Next, in the above-described supply and demand management apparatus, the individual power plant index includes at least the clean energy power amount that is the amount of power generated by clean energy, and the power characteristic index calculation unit calculates the power characteristic index. In doing so, all the clean energy amounts in a plurality of power plants may be used.

  By calculating the power characteristic index in this way, the command value is calculated according to the amount of power using clean energy, so the power consumption state in the consumer area is determined according to the amount of power using clean energy. It becomes possible to control.

  For example, as the amount of power using clean energy increases, the command value is calculated so that the power consumption in the customer region increases, and conversely, as the amount of power using clean energy decreases, the customer region The command value may be calculated so as to reduce the power consumption at.

  Thereby, according to this supply-and-demand management apparatus, electric power supply-and-demand can be managed in consideration of whether the electric power supplied to a consumer area | region from several power plants is the electric power using clean energy.

  When calculating the power characteristic index using the amount of power using clean energy, for example, multiply the amount of power using clean energy of the power plant by a coefficient predetermined for each power plant. The value obtained in this way may be used for the calculation of the power characteristic index. As a coefficient at this time, it is conceivable to set a value according to the type of clean energy, a value according to the rated power generation amount of the power plant, and the like.

  Next, in the above-described supply and demand management apparatus, the individual power plant index includes at least the transmission distance that is the distance between the power plant and the customer area, and the power characteristic index calculation unit calculates the power characteristic index. In doing so, all transmission distances at a plurality of power plants may be used.

  By calculating the power characteristic index in this way, the command value is calculated according to the transmission distance to each power station, so the power consumption state in the customer area is determined according to the transmission distance to each power station. It becomes possible to control.

  For example, the value obtained by dividing the power amount of the power plant by the transmission distance (hereinafter also referred to as distance-divided power amount) is such that the power plant is closer to the power plant if the power generation amount is the same value. It shows a large value and a smaller value as the power plant is farther away from the customer area. On the other hand, the farther away from the consumer area, the greater the power loss in the power transmission system from the power station to the consumer area. Alternatively, it is considered that the amount of electric power distributed from the power plant to the customer region is larger in the customer region closer to the customer region far from the power plant. For this reason, it is thought that the amount of electric power distribution from the power plant to the customer area decreases as the distance from the power plant increases.

  For this reason, for example, the distance division power amount may be calculated using the power transmission distance, and the distance division power amount may be used for calculation of the power characteristic index. Then, the command value is calculated so that the power consumption in the consumer area increases as the distance division power amount increases, and conversely, the power consumption in the consumer area decreases as the distance division power amount decreases. The command value may be calculated as follows.

Thus, by calculating the power characteristic index using the distance-divided power amount, it is possible to manage power supply and demand while reducing power loss in the transmission system from the power plant to the customer area.
Next, in the above-described supply and demand management device, the individual power plant index includes at least weather information estimated power generation estimated based on weather information including at least one of the amount of solar radiation and wind power at the power plant. The power characteristic index calculation unit may use all estimated power generation amounts at a plurality of power plants when calculating the power characteristic index.

By calculating the power characteristic index in this way, the command value is calculated according to the estimated power generation amount, so that it is possible to control the power consumption state in the consumer area according to the estimated power generation amount.
For example, the estimated power generation amount at the solar power plant can be estimated based on the amount of solar radiation, and the estimated power generation amount at the wind power plant can be estimated based on the wind power.

Thereby, the command value can be calculated using the estimated power generation amount without receiving information on the power generation amount from the solar power plant or the wind power plant.
Next, in the above-described supply and demand management apparatus, the power characteristic index calculation unit may use all the power generation facility capacities in a plurality of power plants when calculating the power characteristic index.

  By using all the power generation equipment capacities, it is possible to grasp the maximum amount of power that can be supplied by all power plants. Then, for example, the command value is calculated according to the comparison result by calculating the power characteristic index using the comparison result between the actually supplied power amount and the maximum supply power amount. Accordingly, it becomes possible to control the power consumption state in the consumer area.

  As a comparison result, for example, the difference between the actually supplied power amount and the maximum supplied power amount (hereinafter also referred to as a power margin value), the actually supplied power amount and the maximum supplied power amount, Ratio (hereinafter also referred to as a power margin ratio).

Next, in the above-described supply and demand management device, the power characteristic index calculating unit calculates the power characteristic index, the power generation cost at the plurality of power plants, the greenhouse gas emission amounts at the plurality of power plants, At least one of each CO ₂ emission amount in the power plant and information on whether each of the plurality of power plants is a power plant owned by the company may be used.

  When calculating the power characteristic index, not only the individual power plant index, but also, for example, by using the power generation cost, the command value is calculated according to the power generation cost. The state can be controlled.

  In calculating the power characteristic index, the command value is calculated according to the greenhouse gas emission amount by using not only the individual power plant index but also the respective greenhouse gas emission amounts at a plurality of power plants, for example. Therefore, it is possible to control the power consumption state in the consumer area according to the greenhouse gas emission amount.

Further, upon calculating the power characteristic indicators, not only individual plant indicators, for example, by using each of CO ₂ emissions in a plurality of power plants, since the command value in accordance with the CO ₂ emissions is calculated It becomes possible to control the power consumption state in the consumer area according to the CO ₂ emission amount.

  In calculating the power characteristic index, not only the individual power plant index but also, for example, information on whether each of a plurality of power plants is a power plant owned by the company can be used. Since the command value is calculated according to whether or not there is a power plant, it is possible to control the power consumption state in the customer area depending on whether or not the power plant is owned by the company.

Next, in the above-described supply and demand management apparatus, the command value calculation unit may calculate a command value after the next day at the time of calculation as the command value.
Thus, by calculating the command value after the next day at the time of calculation, the power consumption state after the next day can be determined in advance.

  Next, the above-described supply and demand management device includes a set power comparison unit that compares a demand power amount at an electrical load with a predetermined set power amount, and the load control unit compares the set power comparison unit with the set power comparison unit. The electrical load may be controlled based on the result.

  The load control unit controls the electrical load so that the power consumption at the electrical load is less than or equal to an allowable value when the demand power amount is determined to be less than or equal to the set power amount by the set power comparison unit, and the set power When the comparison unit determines that the demand power amount is larger than the set power amount, the electric load is controlled such that the power consumption at the electric load is equal to or less than the set power amount.

  That is, in this supply and demand management device, based on the comparison result between the demand power amount and the set power amount at the electric load, the electric load is controlled so that the power consumption at the electric load is less than the allowable value, Whether to control the electrical load so that the power consumption at the electrical load is equal to or less than the set power amount is switched.

Thereby, the electrical load can be controlled so that the power consumption at the electrical load does not exceed the set power amount.
Next, in the above-described supply and demand management device, an allowable power amount calculation unit that calculates the allowable power amount based on the power characteristic index, a power comparison unit that compares the demand power amount and the allowable power amount at the electric load, The load control unit may determine whether to control the electric load using the command value according to the comparison result in the power comparison unit.

  When the power comparison unit determines that the demand power amount is larger than the allowable power amount, the command value calculation unit uses the difference value obtained by subtracting the allowable power amount from the demand power amount, The command value including at least the allowable value of the power consumption is calculated, and the load control unit controls the electric load so that the power consumption at the electric load is equal to or less than the allowable value.

In addition, when the power comparison unit determines that the demand power amount is equal to or less than the allowable power amount, the load control unit does not control the electric load using the command value.
In this way, by determining whether or not to control the electric load using the command value based on the comparison result between the demand power amount and the allowable power amount, the electric load using the command value as necessary is determined. Can be controlled. Thereby, the frequency of control of the electric load using the command value can be reduced, and the processing load in the command value calculation unit and the load control unit can be reduced.

  In addition, when controlling the electrical load using the command value, the command value is calculated using the difference value between the demand power amount and the allowable power amount, so the difference value between the demand power amount and the allowable power amount is calculated. The command value can be appropriately set accordingly.

  Thereby, according to the comparison result of demand electric energy and allowable electric energy, control of the electric load using command value can be performed appropriately.

  According to the supply and demand management apparatus of the present invention, when managing the power supply and demand in a consumer area that receives power supply from a plurality of power plants, the characteristics of the power supplied (such as the type of the power plant) are determined by themselves. The power supply and demand can be managed.

It is explanatory drawing which shows schematic structure of a supply-and-demand management system provided with the supply-and-demand management apparatus (BEMS) of 1st Embodiment. It is explanatory drawing which shows an example of an individual power plant index database. It is a flowchart showing the processing content of command value calculation processing. It is explanatory drawing which shows an example of the command value database which shows the correspondence of energy degree EN and electric power control command value (control command level). It is a flowchart showing the processing content of the 2nd command value calculation processing. It is a flowchart showing the processing content of the 3rd command value calculation processing. It is explanatory drawing which shows an example of the database which shows the correspondence of energy degree EN and the allowable electric energy Ws. It is explanatory drawing which shows an example of the command value database which shows the correspondence of difference value Da and electric power control command value (control command level). It is explanatory drawing which shows the various numerical formula for calculating energy degree EN. It is a database showing the correspondence between the energy level EN and the allowable power amount Ws, and is an explanatory diagram showing an embodiment in which the allowable value of power consumption is divided into two stages. It is a database showing the correspondence between the energy level EN and the allowable power amount Ws, and is an explanatory diagram showing an embodiment in which the allowable value of power consumption is divided into three stages.

Embodiments to which the present invention is applied will be described below with reference to the drawings.
[1. First Embodiment]
[1-1. overall structure]
FIG. 1 is an explanatory diagram illustrating a schematic configuration of a supply and demand management system 1 including a supply and demand management apparatus 20 (hereinafter also referred to as “BEMS 20”) according to the first embodiment.

The supply and demand management system 1 includes a single higher-order supply and demand management device 10 (hereinafter also referred to as “CEMS 10”) and a plurality of supply and demand management devices 20 (BEMS 20).
The BEMS 20 is a supply and demand management device for a building whose power supply and demand management target is a building. The supply and demand management system 1 includes three BEMSs 20 that manage three buildings 30 (30A, 30B, and 30C), respectively. In FIG. 1, only one of the three BEMSs 20 is illustrated, and the other BEMSs 20 are not illustrated.

  The plurality of BEMSs 20 control each building 30A, 30B, 30C by controlling / monitoring the power consumption / power generation state of the load equipment 31, the secondary battery 32, and the distributed power sources 33, 34 provided in each building 30A, 30B, 30C. , 30C power supply and demand management.

  Each building 30A, 30B, 30C is supplied with power from a plurality of power plants GE1, GE2 via the power transmission system 16. The buildings 30A, 30B, and 30C are provided with a load facility 31, a secondary battery 32, and distributed power sources 33 and 34, respectively.

  The load facility 31 is a generic name for devices that consume electric power, such as lighting fixtures installed in the buildings 30A, 30B, and 30C, air conditioning facilities, fountains, EV chargers (electric vehicle chargers), and video facilities.

  The secondary battery 32 performs charging of power supplied from the power plants GE1, GE2, the first distributed power source 33, and the second distributed power source 34, power supply to the load facility 31 by discharging the charged power, and the like. The secondary battery 32 is not particularly limited as long as it can be charged and discharged. For example, the secondary battery is not limited to a stationary type, and may be a portable type. Further, a secondary battery mounted on an electric vehicle (EV car) can be connected to the BEMS 20 and used as the secondary battery 32.

  The first distributed power source 33 and the second distributed power source 34 are power generation facilities installed in the buildings 30A, 30B, and 30C. For example, power generation facilities that use renewable natural energy such as solar power generation facilities and wind power generation facilities. It may be a power generation facility using biomass, geothermal heat, or a power generation facility using a small motor (such as a diesel engine) as a power source.

  The first distributed power source 33 and the second distributed power source 34 are not limited to supplying power to the building in which the first distributed power source 33 and the second distributed power source 34 are installed, and can also supply power to other buildings. In addition, the first distributed power source 33 and the second distributed power source 34 are configured to be able to adjust the power generation amount depending on the power generation mode (for example, power generation equipment using biomass and geothermal heat, a small power generator). The power generation amount can be adjusted based on a command from the BEMS 20 or the like.

  As shown in FIG. 1, the CEMS 10 transmits / receives various information to / from a plurality of power companies 15A, 15B and a plurality of BEMSs 20, and a demand response command that is a lower power management target of demand power for each of the BEMSs 20 (Hereinafter, referred to as “DR command”).

  The CEMS 10 transmits and receives various information to and from the BEMS 20 via the lower communication path 18. The CEMS 10 transmits and receives various types of information to and from the power company 15A via the first upper communication path 19A. The CEMS 10 transmits and receives various types of information to and from the power company 15B via the second upper communication path 19B.

Moreover, CEMS10 outputs a low-order power management target to each of BEMS20 as a real-time instruction | indication.
The CEMS 10 is a computer system having a CPU (Central Processing Unit), ROM, RAM, hard disk, input / output interface, and the like. The control program stored in the ROM or the like causes the CPU to function at least as an instruction unit that determines a DR command for each BEMS 20, and causes the input / output interface or the like to function as an acquisition unit and an output unit. It functions as a storage unit that stores various information input from the BEMS 20 or the like.

  Moreover, BEMS20 transmits / receives various information between CEMS10 and several electric power companies 15A and 15B. For example, as described above, the BEMS 20 receives a DR command, a lower power management target, and the like from the CEMS 10. Moreover, BEMS20 has received various information (power generation amount etc.) regarding the power plants GE1 and GE2 from the power companies 15A and 15B. The BEMS 20 transmits / receives various information to / from the electric power company 15A via the first upper communication path 19A, and transmits / receives various information to / from the electric power company 15B via the second upper communication path 19B.

  The BEMS 20 may receive various information (power generation amount and the like) related to the power plants GE1 and GE2 via the CEMS 10. That is, when the CEMS 10 receives and stores various information (power generation amount and the like) related to the power plants GE1 and GE2 from the power company 15A and the power company 15B, the BEMS 20 stores various information related to the power plants GE1 and GE2. It is possible to receive (power generation amount etc.) via CEMS10.

  Further, the BEMS 20 transmits / receives various information to / from the BEMS 20 of another building via the lower communication path 18. For example, the BEMS 20 receives various information (power generation amount and the like) related to the distributed power source provided in the other building from the BEMS 20 of the other building.

  The BEMS 20 is a computer system having a CPU (Central Processing Unit), ROM, RAM, hard disk, input / output interface, and the like. The control program stored in the ROM or the like causes at least the CPU to function as the instruction unit 11, and causes the input / output interface or the like to function as the acquisition unit 13 and the output unit 14. Various information is stored in the hard disk and the like. The CPU 12 is caused to function as at least the control unit 21 that controls the load facility 31, the secondary battery 32, and the distributed power sources 33 and 34.

  The instructing unit 11 uses a power control command value (based on various information such as a power management target input to the BEMS 20 from the outside such as the CEMS 10 and the power companies 15A and 15B and individual power plant indices of each power plant and each distributed power source). The allowable value of the power consumption in the load facility 31, the charge amount of the secondary battery 32, etc.) are determined.

  The power management target is information input from the outside such as the CEMS 10 and the power companies 15A and 15B, and the management target value of the power consumption for each building 30 (building 30A, building 30B, building 30C) managed by the BEMS 20 It is.

  The instruction unit 11 calls various information stored in the storage unit 12 when determining the power control command value, and determines the power control command value based on the called information. The details of the method for setting the power control command value will be described later.

  The storage unit 12 indicates power management targets input from the CEMS 10 and the power companies 15A and 15B, the characteristics of the power plants GE1 and GE2, and the characteristics of the first distributed power source 33 and the second distributed power source 34, respectively. Various information such as individual power plant indicators is stored.

  Individual power plant indicators include power generation capacity C1, C2, C3, C4, current power generation amounts g1, g2, g3, g4, transmission distances D1, D2, D3, D4, coefficients F1, F2, F3, F4, etc. It is.

  The power generation facility capacities C1, C2, C3, and C4 are the maximum amounts of power that can be generated by the distributed power source and the power plant. The current power generation amounts g1, g2, g3, and g4 are the amounts of power currently being generated at the distributed power source and the power plant. The transmission distances D1, D2, D3, and D4 are distances between the distributed power source and the power plant and the building 30 (30A, 30B, and 30C). The coefficients F1, F2, F3, and F4 are numerical values determined according to the power generation method of the distributed power source and the power plant, and the coefficients in the power generation method using clean energy (solar power generation, wind power generation, hydroelectric power generation, etc.) A large value is set as compared with a coefficient in a power generation method using non-clean energy (thermal power generation, nuclear power generation, etc.).

For example, an individual power plant index database as shown in FIG. 2 is stored in the storage unit 12.
In each of the three buildings 30A, 30B, and 30C, individual power plant index databases having contents corresponding to the buildings 30A, 30B, and 30C are stored in the respective storage units 12.

  The acquisition unit 13 acquires various types of information from the CEMS 10 and the plurality of electric power companies 15 </ b> A and 15 </ b> B, and acquires various types of information from the load facility 31 and the secondary battery 32. For example, the acquisition unit 13 acquires, from the load facility 31 or the secondary battery 32, reduction information that is the amount of power reduced based on the power control command value. The reduction information is information measured by a wattmeter provided in the load facility 31, the secondary battery 32, or the buildings 30A, 30B, and 30C. Moreover, the acquisition part 13 acquires at least 1 information of the weather at the time of acquiring reduction information, a season, a time slot | zone, a day of the week, and a demand electric energy.

  The output unit 14 outputs various information to the outside such as the CEMS 10 and the power companies 15A and 15B, and outputs a command signal based on the power control command value to the load facility 31 and the secondary battery 32. is there.

  The control unit 21 controls the power consumption in the load facility 31 based on the power control command value calculated by the instruction unit 11. In addition, the control unit 21 controls charging and discharging of power to the secondary battery 32 based on the power control command value calculated by the instruction unit 11, so that the amount of charge of the secondary battery 32 (remaining battery capacity) is controlled. Capacity). In addition, instead of the charge amount of the secondary battery 32 (remaining capacity with respect to the battery capacity), the charge power amount supplied from the outside when the secondary battery 32 is charged, or the discharge power supplied to the outside when the secondary battery 32 is discharged. The amount may be controlled. Further, the control unit 21 controls the power generation amount in the first distributed power source 33 and the second distributed power source 34.

  The control unit 21 also determines the amount of power actually consumed by the load facility 31, the amount of charge actually stored in the secondary battery 32, and the amount of power generated by the first distributed power source 33 and the second distributed power source 34. It also has a monitoring function.

[1-2. Command value calculation processing]
Next, a control process (command value calculation process) for calculating a power control command value in the supply and demand management device 20 (BEMS 20) of the present embodiment will be described.

  The BEMS 20 receives various information such as a power management target that is a reduction target of power demand and a current power generation amount of each of the power plants GE1 and GE2 from the outside such as the CEMS 10 and the power companies 15A and 15B. The BEMS 20 also receives various types of information related to the current power generation amount from the first distributed power source 33 and the second distributed power source 34. The received current power generation amount of each power plant GE1, GE2 and the current power generation amount of the first distributed power source 33 and the second distributed power source 34 are repeatedly reflected in the item of the current power generation amount in the individual power plant index database shown in FIG. Thus, the current power generation amount stored in the storage unit 12 is periodically updated.

The instruction unit 11 of the BEMS 20 calculates the power control command value of the building 30A using the received power management target, the current power generation amount, and the like.
Specifically, the instruction unit 11 executes a command value calculation process, and thereby, based on various types of information (such as a database) stored in the storage unit 12, the power control command value (the power consumption amount in the load facility 31). Of the secondary battery 32, the amount of charge of the secondary battery 32, and the like.

FIG. 3 is a flowchart showing the processing contents of the command value calculation processing.
When the command value calculation process is started, first, in S110 (S represents a step), the energy level EN is calculated. Specifically, the energy level EN is calculated using each numerical value and [Equation 1] in the individual power plant index database shown in FIG.

  Here, C1 and C2 are the respective power generation facility capacities of the first distributed power supply 33 and the second distributed power supply 34, and C3 and C4 are the respective power generation facility capacities of the power plants GE1 and GE2. g1 and g2 are current power generation amounts of the first distributed power supply 33 and the second distributed power supply 34, respectively, and g3 and g4 are current power generation amounts of the power plants GE1 and GE2. D1 and D2 are power transmission distances to the respective buildings of the first distributed power supply 33 and the second distributed power supply 34, and D3 and D4 are power transmission distances to the respective buildings of the power plants GE1 and GE2. F1 and F2 are the respective coefficients of the first distributed power supply 33 and the second distributed power supply 34, and F3 and F4 are the respective coefficients of the power plants GE1 and GE2.

  Of these, D1, D2, D3, and D4 are linear distances from the first distributed power source 33 and the second distributed power source 34 to the building, linear distances from the power plants GE1 and GE2 to the building, and the like. Also good. Further, in the building 30 in which the first distributed power source 33 and the second distributed power source 34 are provided in the building 30 (30A, 30B, 30C), D1 and D2 are not “0”, ] Is set to a minimum value in a range that does not hinder the calculation.

  Note that the individual power plant index of this embodiment is set with emphasis on the amount of power generated by clean energy, and the coefficients F1, F2, F3, and F4 are set to “1” for the coefficient in the power generation method using clean energy. The coefficient in the power generation method using non-clean energy is set to “0”.

  For this reason, in the amount of power supplied from a plurality of power plants and a plurality of distributed loads, the energy level EN increases as the ratio of the amount of power by clean energy increases, and the energy ratio decreases as the ratio of the amount of power by clean energy decreases. The degree EN becomes smaller.

  In the next S120, a power control command value is calculated based on the energy level EN calculated in S110. Specifically, the power control command value (control command level) corresponding to the energy level EN calculated in S110 based on the command value database indicating the correspondence between the energy level EN and the power control command value (control command level). Is calculated. The command value database is stored in advance in the storage unit 12.

FIG. 4 shows an example of a command value database indicating the correspondence between the energy level EN and the power control command value (control command level).
In the command value database, as the energy level EN increases, the level of the power control command value (control command level) is set higher. Conversely, as the energy level EN decreases, the level of the power control command value (control command level) increases. Is set lower. In the present embodiment, the level of the power control command value (control command level) is defined such that the higher the level, the smaller the number.

  Further, in the command value database, as the level of the power control command value (control command level) increases, a larger value is set for the allowable power consumption in the load facility 31, and the charge amount in the secondary battery 32 is set. A large value is set. On the contrary, as the level of the power control command value (control command level) becomes lower, a smaller value is set for the allowable power consumption in the load facility 31 and a smaller value is set for the charge amount in the secondary battery 32. Is done.

  In other words, in S120, the power control command value (control command level) is calculated based on the energy level EN calculated in S110, so that the allowable power consumption amount in the load facility 31 and the charging in the secondary battery 32 are performed. Set the amount.

  More specifically, as the energy level EN increases, the level of the power control command value (control command level) is set higher, so that a larger value is set for the allowable value of power consumption in the load facility 31. A large value is set for the amount of charge in the secondary battery 32. Conversely, as the energy level EN becomes smaller, the level of the power control command value (control command level) is set lower, so that a smaller value is set for the allowable value of power consumption in the load facility 31, and the secondary A small value is set for the amount of charge in the battery 32.

In next S130, control of the load facility 31 and charge / discharge control of the secondary battery 32 are performed based on the power control command value (control command level) calculated in S120.
Specifically, the instruction unit 11 outputs a command signal regarding control of the load facility 31 and charge / discharge control of the secondary battery 32 to the control unit 21. The control unit 21 performs control of the load facility 31 and charge / discharge control of the secondary battery 32 based on the command signal.

  The control unit 21 controls the load facility 31 so that the amount of power in the load facility 31 is equal to or less than the “allowable value of power consumption in the load facility 31” obtained in the calculation of S120. 31 is controlled. Further, the control unit 21 controls the secondary battery 32 so that the charge amount of the secondary battery 32 approaches the “charge amount of the secondary battery 32” obtained by the calculation of S120. Charge / discharge control of the battery 32 is performed.

In the next step S140, it is determined whether or not a predetermined standby time has elapsed. When the standby time has elapsed from the start of processing in this step, this step is terminated.
Note that the standby time is determined in advance according to the period during which the power supply / demand status changes. For example, in a system in which the power supply / demand status changes every hour, the standby time is set to 1 hour or less. Yes.

When S140 ends, the process proceeds to S110 again.
In this way, the command value calculation process is executed by the instruction unit 11 of the BEMS 20, whereby the energy level is calculated (S110), and the power control command value (control command level) is calculated based on the energy level ( S120), control of the load facility 31 and charge / discharge control of the secondary battery 32 are performed based on the power control command value (control command level) (S130).

  That is, in the supply and demand management system 1, in each of the building 30A, the building 30B, and the building 30C, the BEMS 20 calculates a power control command value (control command level) and loads based on the power control command value (control command level). By controlling the facility 31 and the secondary battery 32, the power consumption state in the building 30A, the building 30B, and the building 30C is managed.

[1-3. effect]
As described above, the supply and demand management system 1 of this embodiment includes a plurality of supply and demand management devices 20 (BEMS 20), and the buildings 30A, 30B, and 30C that are the management targets of the plurality of BEMSs 20 are as follows. Power is supplied from the plurality of power plants GE1, GE2 and the plurality of distributed power sources 33.34.

  In the BEMS 20, the instruction unit 11 executes the command value calculation process S110, thereby calculating the energy level EN using each numerical value and [Equation 1] in the individual power plant index database. Moreover, in BEMS20, the instruction | indication part 11 calculates electric power control command value (control command level) based on the energy degree EN calculated by S110 by performing S120 of command value calculation processing.

  In this supply and demand management device 20, since the energy level EN is calculated using each numerical value in the individual power plant index database, the power supply GE 1 and GE 2 and a plurality of distributed power sources 33.34 manage themselves (demand and supply management device 20). The characteristic of the electric power supplied to the target building 30 can be determined. Then, by setting a power control command value (control command level) based on at least the energy level EN, characteristics of power supplied to the building 30 from the plurality of power plants GE1, GE2 and the plurality of distributed power sources 33.34 Accordingly, the power consumption state in the building 30 can be changed.

  Thereby, it becomes possible to set the power control command value (control command level) according to the characteristic of the power supplied to the building 30 to be managed by the supply and demand management device 20, and the characteristic of the supplied power (the power plant The power consumption state according to the type) can be realized.

  Therefore, according to the supply and demand management apparatus 20, in managing the power supply and demand in the building 30 (building 30A, building 30B, building 30C) that receives power supply from the plurality of power plants GE1, GE2 and the plurality of distributed power sources 33.34. The power supply / demand can be managed by discriminating the characteristics of the supplied power (such as the type of power plant) by itself (demand / supply management device 20).

  Next, in the supply and demand management device 20, the individual power plant index includes the distributed power source and the current power generation amounts g1, g2, g3, and g4 that are currently being generated at the power plant, and the distributed power source and power plant. The coefficients F1, F2, F3, and F4 as numerical values determined according to the power generation method are included at least. The coefficients F1, F2, F3, and F4 are set to “1” as the coefficient in the power generation method using clean energy, and set to “0” as the coefficient in the power generation method using non-clean energy.

That is, the individual power plant index of the present embodiment includes at least a clean energy power amount that is an amount of power generated by clean energy.
[Equation 1] for calculating the energy level EN includes a multiplication term of the current power generation amount g1, g2, g3, g4 and the coefficients F1, F2, F3, F4. 11, all clean energy amounts in the plurality of power plants GE1, GE2 and the plurality of distributed power sources 33, 34 are used.

  By calculating the energy level EN in this way, a power control command value (control command level) is set according to the amount of power using clean energy. It becomes possible to control the power consumption state in the building 30 to be managed.

  And when the instruction | indication part 11 performs S110 of command value calculation processing and calculates energy level EN, the ratio of the electric energy by clean energy in the electric energy supplied from several power plants and several distributed power supplies The energy level EN increases as the value of increases, and the energy level EN decreases as the ratio of the amount of power by clean energy decreases.

  Further, when the instruction unit 11 executes S120 of the command value calculation process to calculate the power control command value (control command level), the level of the power control command value (control command level) increases as the energy degree EN increases. Is set higher, a large value is set for the allowable value of the power consumption in the load facility 31, and a large value is set for the charge amount in the secondary battery 32. Conversely, as the energy level EN becomes smaller, the level of the power control command value (control command level) is set lower, so that a smaller value is set for the allowable value of power consumption in the load facility 31, and the secondary A small value is set for the amount of charge in the battery 32.

  That is, in the supply and demand management device 20, as the amount of power using clean energy increases, the power control command value (control command) so that the power consumption in the building 30 to be managed by itself (demand and supply management device 20) increases. Level) is set. On the contrary, the power control command value (control command level) is set so that the power consumption in the building 30 to be managed by itself (demand / supply management device 20) decreases as the amount of power using clean energy decreases. ing.

  Thereby, according to the supply and demand management apparatus 20, the power supplied from the plurality of power plants GE1 and GE2 and the plurality of distributed power sources 33 and 34 to the building 30 to be managed by itself (the supply and demand management apparatus 20) uses clean energy. It is possible to manage power supply and demand in consideration of whether or not the power is low.

  Next, in the supply and demand management device 20, the individual power plant indicators include at least power transmission distances D 1, D 2, D 3, and D 4 that are distances between the distributed power sources 33 and 34 and the power plants GE 1 and GE 2 and the building 30. Yes.

  [Equation 1] for calculating the energy level EN includes transmission distances D1, D2, D3, and D4. When the energy level EN is calculated by the instruction unit 11 of the BEMS 20, a plurality of energy levels EN are calculated. All the transmission distances D1, D2, D3, D4 in the distributed power sources 33, 34 and the plurality of power plants GE1, GE2 are used.

  By calculating the energy level EN in this way, the power control command value (control command level) is set according to the transmission distances D1, D2, D3, and D4 between the distributed power sources 33 and 34 and the power plants GE1 and GE2. Therefore, it becomes possible to control the power consumption state in the building 30 according to the power transmission distances D1, D2, D3, and D4.

  [Formula 1] has a term obtained by dividing the current power generation amounts g1, g2, g3, and g4 by the transmission distances D1, D2, D3, and D4. A value obtained by dividing the current power generation amounts g1, g2, g3, g4 by the transmission distances D1, D2, D3, D4 (hereinafter also referred to as distance division power amount) is the current power generation amounts g1, g2, g3. If g4 is the same value, the distributed power sources 33 and 34 and the power plants GE1 and GE2 that are closer to the building 30 show larger values, and the distributed power sources 33 and 34 and the power plant GE1 that are farther from the building 30 are larger. , GE2 indicates a smaller value. On the other hand, the power loss in the power transmission system from the distributed power sources 33 and 34 and the power plants GE1 and GE2 to the building 30 increases as the distributed power sources 33 and 34 and the power plants GE1 and GE2 are far from the building 30.

  Alternatively, it is considered that the distribution amount of each power from the distributed power sources 33 and 34 and the power plants GE1 and GE2 to the building 30 is larger in a building that is closer than a building that is far from the distributed power source and the power plant. For this reason, the farther the distance from the distributed power source and the power plant, the smaller the amount of power distributed from the distributed power source and power plant to the building.

The energy degree EN increases as the distance division power amount increases, and the energy degree EN decreases as the distance division power amount decreases.
Further, when the instruction unit 11 executes S120 of the command value calculation process to calculate the power control command value (control command level), the level of the power control command value (control command level) increases as the energy degree EN increases. Is set higher, a large value is set for the allowable value of the power consumption in the load facility 31, and a large value is set for the charge amount in the secondary battery 32. Conversely, as the energy level EN becomes smaller, the level of the power control command value (control command level) is set lower, so that a smaller value is set for the allowable value of power consumption in the load facility 31, and the secondary A small value is set for the amount of charge in the battery 32.

  That is, the supply and demand management device 20 does not perform control so that the power consumption in the building 30 to be managed by itself (demand and supply management device 20) increases or the power consumption decreases as the distance-divided power amount increases. Thus, the power control command value (control command level) is set. On the other hand, as the distance-divided power amount decreases, the power control is performed so that the power consumption in the building 30 to be managed by itself (the supply and demand management device 20) decreases or no control is performed to increase the power consumption. The command value (control command level) is set.

  By calculating the energy level EN using the distance-divided power in this manner, power supply and demand can be reduced while reducing power loss in the power transmission system from the distributed power sources 33 and 34 and the power plants GE1 and GE2 to the building 30. Can be managed.

  Next, in the supply and demand management device 20, [Equation 1] for calculating the energy level EN includes the power generation equipment capacities C 1, C 2, C 3 and C 4, and the energy level EN is indicated by the instruction unit 11 of the BEMS 20. Is calculated, all the power generation equipment capacities C1, C2, C3, C4 in the plurality of distributed power sources 33, 34 and the plurality of power plants GE1, GE2 are used.

  By using all the power generation equipment capacities C1, C2, C3, C4, it becomes possible to grasp the maximum power supply amount that can be supplied by all the distributed power sources 33, 34 and the power plants GE1, GE2. In the present embodiment, the energy level EN includes the current power generation amounts g1, g2, g3, g4 (the amount of power that is actually supplied) and the power generation facility capacities C1, C2, C3, C4 (the maximum amount of power supply). The value according to the ratio (hereinafter also referred to as the power margin ratio) is shown. By calculating the power control command value (control command level) using this energy degree EN, the power control command value (control command level) is set according to the comparison result (power margin ratio). Accordingly, the power consumption state in the building 30 can be controlled.

[1-4. Correspondence with Claims]
Here, the correspondence of the words in the claims and the present embodiment will be described.
The supply and demand management device 20 (BEMS 20) corresponds to an example of a supply and demand management device, the building 30A, the building 30B, and the building 30C each correspond to an example of a customer area, and the distributed power sources 33 and 34 and the power plants GE1 and GE2 are power plants. The load facility 31 and the secondary battery 32 correspond to an example of an electrical load.

  The instruction unit 11 that executes S110 corresponds to an example of a power characteristic index calculation unit, the energy level corresponds to an example of a power characteristic index, the instruction unit 11 that executes S120 corresponds to an example of a command value calculation unit, and S130 The instruction unit 11 and the control unit 21 that execute the process correspond to an example of a load control unit.

  Current power generation amounts g1, g2, g3, and g4 with coefficients F1, F2, F3, and F4 being “1” correspond to an example of clean energy power amount, and transmission distances D1, D2, D3, and D4 are examples of transmission distances. The power generation equipment capacities C1, C2, C3, and C4 correspond to an example of the power generation equipment capacity, and the power control command value (control command level) corresponds to an example of the command value.

[2. Second Embodiment]
[2-1. Second supply and demand management device]
As a second embodiment, the demand power amount in the load facility 31 and the secondary battery 32 is compared with a predetermined set power amount, and an energy level calculation and a power control command value (control command) according to the comparison result. A second supply and demand management device (BEMS) having a process (step) for determining whether or not to perform a calculation of (level) will be described.

Since the hardware configuration of the second supply and demand management device is the same as that of the supply and demand management device 20 described above, description thereof is omitted.
FIG. 5 is a flowchart showing the processing content of the second command value calculation processing executed by the second supply and demand management device.

  When the second command value calculation process is started, first, in S210 (S represents a step), it is determined whether or not the demand power amount Wa is equal to or less than the set power amount Wu. Shifts to S220, and shifts to S250 if a negative determination is made.

  The demand power amount Wa is the demand power amount of the load facility 31 and the secondary battery 32 provided in the building 30 that is the management target of the second supply and demand management device. That is, the demand power amount Wa is the amount of power necessary for the load facility 31 and the secondary battery 32, and is included in various information received from the load facility 31 and the secondary battery 32 by the second supply and demand management device.

  The set power amount Wu is a fixed value set in advance for each building 30. For example, the set power amount Wu is set to a value that is smaller than the contract power amount of the building 30 defined by the contract between the building 30 and the power company by a certain amount. That is, in the set power amount Wu, a warning threshold is set so that the amount of power actually consumed by the load facility 31 and the secondary battery 32 does not exceed the contracted power amount of the building 30.

  That is, in S210 of the present embodiment, it is determined whether or not the amount of power (demand power amount Wa) required for the load facility 31 and the secondary battery 32 is equal to or less than the contracted power amount (set power amount Wu) of the building 30. doing.

  When an affirmative determination is made in S210 and the process proceeds to S220, the energy degree EN is calculated in S220, as in the above-described process in S110. Note that the calculation method of the energy degree EN has already been described in S110 described above, and thus the description thereof is omitted here.

  In the next S230, a power control command value is calculated based on the energy level EN calculated in S220, similarly to the process in S120 described above. Since the calculation method of the power control command value has already been described in S120 described above, description thereof is omitted here.

  In next S240, similarly to the processing in S130 described above, control of the load facility 31 and charge / discharge control of the secondary battery 32 are performed based on the power control command value (control command level) calculated in S230. Note that the control of the load facility 31 and the charge / discharge control of the secondary battery 32 have already been described in S <b> 130 described above, and thus description thereof is omitted here.

  When a negative determination is made in S210 and the process proceeds to S250, in S250, the load facility 31 is controlled so as to reduce the amount of power required by the load facility 31 and the secondary battery 32 (demand power amount Wa).

  Specifically, the load facility 31 and the secondary battery 32 are controlled such that the amount of power (demand power amount Wa) is equal to or less than the contracted power amount (set power amount Wu) of the building 30. Charge / discharge control of the secondary battery 32 is performed.

  At this time, as a method of reducing the demand power amount Wa in the load facility 31 and the secondary battery 32, for example, all devices (lighting fixtures, air conditioning facilities, fountains, EV chargers (electric vehicles) provided as the load facility 31 Battery charger, video equipment, etc.) and a method for uniformly reducing the power consumption of the secondary battery 32.

  In addition, as another method of reducing the demand power amount Wa in the load facility 31 and the secondary battery 32, for example, among the devices provided as the load facility 31 and the secondary battery 32, it is easy to reduce the power consumption. There is a method for preferentially reducing the power consumption from the device. Specifically, first, if the power consumption in an entertainment device such as a fountain is reduced, and the demand power amount Wa still does not fall below the set power amount Wu, then the power consumption in the video equipment is Then, a method of reducing the power consumption in the order of the EV charger, the secondary battery 32, the air conditioning equipment, and the lighting fixture can be considered. As described above, if the power consumption is preferentially reduced from the device that can easily reduce the power consumption, when the demand power amount Wa becomes equal to or less than the set power amount Wu, Therefore, it is not necessary to reduce the power consumption, and the device can be operated as originally planned.

  When S240 or S250 ends, the process proceeds to S260. In S260, it is determined whether or not a predetermined standby time has elapsed, as in the above-described process in S140, and the process waits from the start of the process in this step. When the time has elapsed, this step is finished. Note that the method for determining the elapse of the standby time has already been described in S140 described above, and thus the description thereof is omitted here.

When S260 ends, the process proceeds to S210 again.
In this way, by executing the second command value calculation process in the instruction unit 11 of the second supply and demand management device, the energy level is used according to the comparison result between the demand power amount Wa and the set power amount Wu. The load facility 31 and the secondary battery 32 are controlled, or the load facility 31 and the secondary battery 32 are controlled without using the energy level.

  That is, the second supply and demand management device controls the load facility 31 and the secondary battery 32 using the energy level when the demand power amount Wa is equal to or less than the set power amount Wu, so that the building 30A, the building 30B, The power consumption state in the building 30C is managed.

  In addition, when the demand power amount Wa is larger than the set power amount Wu, the second supply and demand management device controls the load facility 31 and the secondary battery 32 without using the energy level, thereby building 30A and building 30B. The power consumption state in the building 30C is managed. When the demand power amount Wa is larger than the set power amount Wu, the second supply and demand management device controls the load facility 31 and the secondary battery 32 so that the demand power amount Wa is equal to or less than the set power amount Wu. To do.

[2-2. effect]
As described above, the second supply and demand management device that executes the second command value calculation process is based on the comparison result between the demand power amount Wa and the set power amount Wu in the load facility 31 and the secondary battery 32. The load facility 31 and the secondary battery 32 are controlled based on the power control command value (power control level) set using the degree, or the power consumption in the load facility 31 and the secondary battery 32 is the set power amount Wu. The load facility 31 and the secondary battery 32 are controlled so as to be as follows.

  Note that when the demand power amount Wa is equal to or less than the set power amount Wu, the second supply and demand management device, regarding the control of the load facility 31, obtains the power amount in the load facility 31 by the calculation of S230. The load facility 31 is controlled so as to be equal to or less than the “allowable value of power consumption in the load facility 31”. Further, regarding the charge / discharge control of the secondary battery 32, the second supply and demand management device is such that the charge amount of the secondary battery 32 approaches the “charge amount of the secondary battery 32” obtained in the calculation of S230. Charge / discharge control of the secondary battery 32 is performed.

  Furthermore, when the demand power amount Wa is larger than the set power amount Wu, the second supply and demand management device controls the load facility 31 and the secondary battery 32 so that the demand power amount Wa is equal to or less than the set power amount Wu. To do.

Thereby, the load facility 31 and the secondary battery 32 can be controlled so that the power consumption in the load facility 31 and the secondary battery 32 does not exceed the set power amount Wu.
Moreover, the 2nd demand-and-supply management apparatus which performs a 2nd command value calculation process is similar to the demand-and-supply management apparatus 20 (BEMS20) of 1st Embodiment from several power plants GE1, GE2, and several distributed power supply 33.34. When managing the power supply and demand in the building 30 receiving power supply (building 30A, building 30B, building 30C), the characteristics (type of power plant, etc.) of the supplied power are determined by itself (the supply and demand management device 20). The power supply and demand can be managed.

[2-3. Correspondence with Claims]
Here, the correspondence of the words in the claims and the present embodiment will be described.
The second supply and demand management device (BEMS) corresponds to an example of the supply and demand management device, the instruction unit 11 that executes S210 corresponds to an example of the set power comparison unit, and the instruction unit 11 that executes S220 corresponds to the power characteristic index calculation unit. This corresponds to an example, the energy level corresponds to an example of a power characteristic index, and the instruction unit 11 that executes S230 corresponds to an example of a command value calculation unit.

The instruction unit 11 and the control unit 21 that execute S240 correspond to an example of the load control unit, the demand power amount Wa corresponds to an example of the demand power amount, and the set power amount Wu corresponds to an example of the set power amount.
[3. Third Embodiment]
[3-1. Third supply and demand management device]
As a third embodiment, the demand power amount Wa in the load facility 31 and the secondary battery 32 is compared with a predetermined allowable power amount Ws, and the power control command value (control command level) is determined according to the comparison result. A third demand and supply management device (BEMS) having a process (step) for determining whether or not to perform calculation will be described.

Since the hardware configuration of the third supply and demand management device is the same as that of the supply and demand management device 20 described above, description thereof is omitted.
FIG. 6 is a flowchart showing the processing contents of the third command value calculation processing executed by the third supply and demand management device.

  When the third command value calculation process is activated, first, in S310 (S represents a step), the energy degree EN is calculated in the same manner as the process in S110 described above. Note that the calculation method of the energy degree EN has already been described in S110 described above, and thus the description thereof is omitted here.

  In the next S320 (S represents a step), the allowable power amount Ws is calculated based on the energy level EN obtained in S310. Specifically, the allowable power amount Ws corresponding to the energy level EN calculated in S310 is calculated based on a database indicating the correspondence relationship between the energy level EN and the allowable power amount Ws. The command value database is stored in advance in the storage unit 12.

  FIG. 7 shows an example of a database indicating the correspondence between the energy level EN and the allowable power amount Ws. In this database, as the energy level EN increases, the allowable power amount Ws is set higher. Conversely, as the energy level EN decreases, the allowable power amount Ws is set lower.

  The allowable power amount Ws is an amount of power that can be allowed as the demand power amount of the load facility 31 and the secondary battery 32 provided in the building 30 that is the management target of the third supply and demand management device, and depends on the energy level EN. The amount of power to be determined.

  In the next S330 (S represents a step), it is determined whether the demand power amount Wa is larger than the allowable power amount Ws. If an affirmative determination is made, the process proceeds to S340, and if a negative determination is made. The process proceeds to S360.

  The demand power amount Wa is the demand power amount of the load facility 31 and the secondary battery 32 provided in the building 30 that is the management target of the third supply and demand management device. That is, the demand power amount Wa is the power amount necessary for the load facility 31 and the secondary battery 32, and is included in various information received from the load facility 31 and the secondary battery 32 by the third supply and demand management device.

  That is, in S330, it is determined whether or not the amount of power (demand power amount Wa) required by the load facility 31 and the secondary battery 32 is larger than the allowable power amount Ws determined based on the energy level EN.

  When an affirmative determination is made in S330 and the process proceeds to S340, in S340, based on the difference value Da (= Wa−Ws) between the demand power amount Wa and the allowable power amount Ws, the power control command value (power consumption in the load facility 31). An allowable value of the amount, a charge amount of the secondary battery 32, and the like). Specifically, first, after calculating the difference value Da, the power control corresponding to the difference value Da based on the command value database indicating the correspondence between the difference value Da and the power control command value (control command level). Command value (control command level) is calculated. The command value database is stored in advance in the storage unit 12.

FIG. 8 shows an example of a command value database indicating the correspondence between the difference value Da and the power control command value (control command level).
In this command value database, as the difference value Da becomes smaller, the level of the power control command value (control command level) is set higher. Conversely, as the difference value Da becomes larger, the power control command value (control command level) increases. The level is set lower. In the present embodiment, the level of the power control command value (control command level) is defined such that the higher the level, the smaller the number.

  Further, in this command value database, as the level of the power control command value (control command level) increases, a larger value is set for the allowable power consumption in the load facility 31, and the charge amount in the secondary battery 32 is set. Is set to a large value. On the contrary, as the level of the power control command value (control command level) becomes lower, a smaller value is set for the allowable power consumption in the load facility 31 and a smaller value is set for the charge amount in the secondary battery 32. Is done.

  That is, in S340, the power control command value (control command level) is calculated based on the difference value Da, thereby setting the allowable power consumption amount in the load facility 31, the charge amount in the secondary battery 32, and the like. To do.

  More specifically, as the difference value Da becomes smaller, the level of the power control command value (control command level) is set higher, so that a larger value is set for the allowable power consumption in the load facility 31. A large value is set for the amount of charge in the secondary battery 32. Conversely, as the difference value Da increases, the level of the power control command value (control command level) is set lower, so that a smaller value is set for the allowable value of power consumption in the load facility 31, and the secondary A small value is set for the amount of charge in the battery 32.

In next S350, control of the load facility 31 and charge / discharge control of the secondary battery 32 are performed based on the power control command value (control command level) calculated in S340.
Specifically, the instruction unit 11 outputs a command signal regarding control of the load facility 31 and charge / discharge control of the secondary battery 32 to the control unit 21. The control unit 21 performs control of the load facility 31 and charge / discharge control of the secondary battery 32 based on the command signal.

  The control unit 21 controls the load facility 31 so that the amount of power in the load facility 31 is equal to or less than the “allowable value of power consumption in the load facility 31” obtained in the calculation of S340. 31 is controlled. Further, the control unit 21 controls the secondary battery 32 so that the charge amount of the secondary battery 32 approaches the “charge amount of the secondary battery 32” obtained by the calculation of S340. Charge / discharge control of the battery 32 is performed.

  When a negative determination is made in S330 or when S350 ends and the process proceeds to S360, it is determined in S360 whether or not a predetermined standby time has elapsed, and the standby time has elapsed from the start of processing in this step. Then, this step is finished.

  Note that the standby time is determined in advance according to the period during which the power supply / demand status changes. For example, in a system in which the power supply / demand status changes every hour, the standby time is set to 1 hour or less. Yes.

When S360 ends, the process proceeds to S310 again.
In this way, the third command value calculation process is executed by the instruction unit 11 of the third supply and demand management device, whereby the power control command value (in accordance with the comparison result between the demand power amount Wa and the allowable power amount Ws). Whether or not to calculate (control command level) is switched.

  In other words, when the demand power amount Wa is larger than the allowable power amount Ws, the third supply and demand management device calculates the power control command value (control command level), and the power control command value (control command level). Is used to control the load equipment 31 and the secondary battery 32, thereby managing the power consumption state in the building 30A, the building 30B, and the building 30C.

  In addition, when the demand power amount Wa is equal to or less than the allowable power amount Ws, the third supply and demand management device does not calculate the power control command value (control command level) but uses the power control command value (control command level). The load equipment 31 and the secondary battery 32 used are not controlled.

[3-2. effect]
As described above, the third supply and demand management device that executes the third command value calculation process is based on the comparison result between the demand power amount Wa and the allowable power amount Ws in the load facility 31 and the secondary battery 32. The load facility 31 and the secondary battery 32 are controlled using the control command value (control command level), or the load facility 31 and the secondary battery 32 are not controlled using the power control command value (control command level). Or switching.

  That is, when it is determined that the demand power amount Wa is larger than the allowable power amount Ws (affirmative determination in S330), the third supply and demand management device determines a difference value Da (the demand power amount Wa and the allowable power amount Ws). = Wa-Ws), and the power control command value is calculated based on the difference value Da. Specifically, first, after calculating the difference value Da, a power control command value (control command level) corresponding to the difference value Da is calculated based on the command value database (S340). Then, the load facility 31 and the secondary battery 32 are controlled using the power control command value (control command level) (S350). Thereafter, a determination is made as to whether the standby time has elapsed (S360).

  Further, the third supply and demand management device calculates the power control command value (control command level) corresponding to the difference value Da when the demand power amount Wa is determined to be equal to or less than the allowable power amount Ws (negative determination in S330). (S340) and the standby time progress determination (S360) is performed without performing control (S350) of the load facility 31 and the secondary battery 32 using the power control command value (control command level).

  In this way, it is determined whether or not to control the load facility 31 and the secondary battery 32 using the power control command value (control command level) based on the comparison result between the demand power amount Wa and the allowable power amount Ws. By doing so, the load facility 31 and the secondary battery 32 using the power control command value (control command level) can be controlled as necessary. Thereby, the frequency of control of the load facility 31 and the secondary battery 32 using the power control command value (control command level) can be reduced, and the processing load on the instruction unit 11 and the control unit 21 that execute S340 and S350 is reduced. it can.

  Further, when controlling the load facility 31 and the secondary battery 32 using the power control command value (control command level), the power control command is used by using the difference value Da between the demand power amount Wa and the allowable power amount Ws. Since the value (control command level) is calculated, the power control command value (control command level) can be appropriately set according to the difference value Da between the demand power amount Wa and the allowable power amount Ws.

  Accordingly, the third supply and demand management device controls the load facility 31 and the secondary battery 32 using the power control command value (control command level) according to the comparison result between the demand power amount Wa and the allowable power amount Ws. Can be implemented appropriately.

[3-3. Correspondence with Claims]
Here, the correspondence of the words in the claims and the present embodiment will be described.
The third supply and demand management device (BEMS) corresponds to an example of a supply and demand management device, the instruction unit 11 that executes S310 corresponds to an example of a power characteristic index calculation unit, and the instruction unit 11 that executes S320 corresponds to an allowable power amount calculation unit. The instruction unit 11 that executes S330 corresponds to an example of a power comparison unit, and the instruction unit 11 that executes S340 corresponds to an example of a command value calculation unit.

The instruction unit 11 and the control unit 21 that execute S350 correspond to an example of a load control unit, the demand power amount Wa corresponds to an example of the demand power amount, and the allowable power amount Ws corresponds to an example of the allowable power amount.
[4. Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it is possible to implement in various aspects.

  For example, in the above-described embodiment, the form using [Equation 1] as the arithmetic expression of the energy degree EN has been described, but the arithmetic expression of the energy degree EN is not limited to [Equation 1]. Specifically, each formula shown in FIG. 9 may be used as an arithmetic expression for the energy level EN.

  Of these mathematical formulas, [Equation 2] is the total value of the current power generation amounts g1, g2, g3, and g4, and the energy level EN in this case is the plurality of distributed power sources 33 and 34 and the power plants GE1 and GE2. The value according to the total electric energy supplied from is shown. By calculating the energy level EN in this way, the power control command value (control command level) is set according to the total power amount, and therefore the building 30 (building 30A, It becomes possible to control the power consumption state in the building 30B and the building 30C).

  Next, [Equation 3] is the total value of the multiplication terms of the current power generation amounts g1, g2, g3, and g4 and the coefficients F1, F2, F3, and F4. In this case, the energy level EN is the current power generation amount g1. , G2, g3, g4 as well as power generation methods (coefficients F1, F2, F3, F4) are shown. By calculating the energy level EN in this manner, a power control command value (control command level) is set according to the current power generation amounts g1, g2, g3, g4, the power generation method, and the like. It becomes possible to control the power consumption state in the building 30 (building 30A, building 30B, building 30C) to be managed according to g2, g3, g4 and the power generation method.

  Next, [Equation 4] includes the current power generation amounts g1, g2, g3, and g4 and the power generation equipment capacities C1, C2, C3, and C4. The energy level EN in this case is the current power generation amounts g1, g2 , G3, g4 as well as the power generation equipment capacities C1, C2, C3, C4 are shown. This energy level EN corresponds to the ratio between the actually supplied power amount and the maximum supplied power amount (hereinafter also referred to as a power margin ratio). By calculating the energy level EN in this way, the power control command value (control command level) is set according to the power margin ratio. Therefore, the building 30 (building 30A, building) that is the management target according to the power margin ratio is set. It becomes possible to control the power consumption state in the building 30B and the building 30C).

  Next, [Formula 5] includes coefficients F1, F2, F3, and F4 in addition to the current power generation amounts g1, g2, g3, and g4 and the power generation equipment capacities C1, C2, C3, and C4. The energy level indicates a value reflecting a power generation method or the like (coefficients F1, F2, F3, F4) as compared with [Equation 4]. By calculating the energy level EN in this way, the power control command value (control command level) is set according to the power margin ratio and the power generation method, etc. It is possible to control the power consumption state in the building 30 (building 30A, building 30B, building 30C).

  Next, [Equation 6] is an equation in which the transmission distances D1, D2, D3, and D4 are replaced with the square values of the transmission distances D1, D2, D3, and D4 with respect to [Equation 1]. Compared with [Equation 1], the energy degree is a value that reflects the power transmission distances D1, D2, D3, and D4 more greatly. By calculating the energy degree EN in this way, the power margin ratio, power generation method, etc. (coefficients F1, F2, etc.) using the current power generation amounts g1, g2, g3, g4 and the power generation equipment capacities C1, C2, C3, C4. F3, F4), and the power control command value (control command level) is set according to the transmission distances D1, D2, D3, D4. It becomes possible to control the power consumption state at 30 (building 30A, building 30B, building 30C).

  Next, [Equation 7] is an equation for calculating the energy level EN by dividing [Equation 3] by the power management target de. The power management target de is information input from the outside such as the CEMS 10 and the power companies 15A and 15B, and is a management target value of the power consumption for each building 30 (building 30A, building 30B, building 30C) managed by the BEMS 20. is there. By calculating the energy degree EN in this way, the power control command value (control command level) is set according to the power management target de, such as the current power generation amount g1, g2, g3, g4, the power generation method, etc. It becomes possible to control the power consumption state in the building 30 (building 30A, building 30B, building 30C) according to the power management target de such as the current power generation amount g1, g2, g3, g4, the power generation method, and the like.

  Next, [Equation 8] is an equation in which the denominator of [Equation 1] is replaced with the power management target de, and the current power generation amounts g1, g2, g3, and g4, coefficients F1, F2, F3, and F4, and transmission distance D1. , D2, D3, and D4. The energy degree EN in this case indicates a value reflecting the power management target de, the current power generation amounts g1, g2, g3, g4, the coefficients F1, F2, F3, F4, and the transmission distances D1, D2, D3, D4. By calculating the energy level EN in this way, the power management target de, the current power generation amounts g1, g2, g3, and g4, the coefficients F1, F2, F3, and F4, and the transmission distances D1, D2, D3, and D4 are determined. Since the power control command value (control command level) is set, the power management target de, current power generation amounts g1, g2, g3, g4, coefficients F1, F2, F3, F4, transmission distances D1, D2, D3, D4 Accordingly, the power consumption state in the building 30 (building 30A, building 30B, building 30C) can be controlled.

  Next, [Equation 9] is an equation in which the transmission distances D1, D2, D3, and D4 are replaced with the square values of the transmission distances D1, D2, D3, and D4 with respect to [Equation 8]. Compared with [Equation 8], the energy degree is a value in which the transmission distances D1, D2, D3, and D4 are reflected more greatly. By calculating the energy level EN in this way, the power management target de, the current power generation amounts g1, g2, g3, g4, the power generation method (coefficients F1, F2, F3, F4), the transmission distances D1, D2, D3, Since the power control command value (control command level) is set according to D4, the power in the building 30 (building 30A, building 30B, building 30C) according to the power management target, the current power generation amount, the power generation method, and the transmission distance The consumption state can be controlled.

  Note that de in [Equation 7] to [Equation 9] is not limited to the power management target, but “current power consumption of the consumer area” and “power consumption of the consumer area for a certain period of time”. (For example, the accumulated electric energy in the past one hour from the present, or one hour from 1:00 to 1:59 in the case where the current is one hour ** minutes) may be used.

  Next, in the above embodiment, the current power generation amount g1, g2, g3, g4 is necessarily included as the individual power plant index (in other words, the current power generation amount g1, g2, g3 However, the present invention is not limited to such a form. For example, as in [Equation 10], the individual power plant index may include at least one of solar radiation and wind power.

  Here, in [Equation 10], a is a conversion coefficient for converting the amount of solar radiation into a power generation amount, b is a conversion coefficient for converting wind power into a power generation amount, and c is a source of clean power generation. This is a conversion coefficient for converting the state quantity to the power generation quantity. Note that the estimated power generation amount at the solar power plant can be estimated based on the amount of solar radiation, and the estimated power generation amount at the wind power plant can be estimated based on the wind power.

  In other words, [Equation 10] is an arithmetic expression that calculates the total value of the estimated power generation amount regarding the clean power generation amount (power generation amount based on the amount of solar radiation, wind power, and clean power generation) of each power plant. By calculating the energy level EN in this way, the power control command value (control command level) is set according to the total value of the estimated power generation amount related to the clean power generation amount. It becomes possible to control the power consumption state in the building 30 (building 30A, building 30B, building 30C) according to the value.

  The supply and demand management apparatus of such a form can set a power control command value (control command level) using the estimated power generation amount without receiving information on the power generation amount from the solar power plant or the wind power plant.

  Next, in the above-described embodiment, the mode in which the coefficient in the individual power plant index is “a numerical value determined according to the power generation method of the power plant and the distributed power source” has been described, but the present invention is limited to such a mode. There is nothing. For example, the coefficient may be “a numerical value determined according to the power generation cost of the power plant and the distributed power source”. As the coefficient in this case, a smaller value is set as the power generation cost is higher, and a larger value is set as the power generation cost is lower.

  For this reason, in the amount of power supplied from a plurality of power plants and distributed power sources, the proportion of power generated by low-cost power plants and distributed power sources increases (in other words, the amount of power generated by high-cost power plants and distributed power sources). The smaller the ratio, the greater the energy level EN, and the larger the ratio of the amount of power generated by the high-cost power plant and the distributed power source (in other words, the lower the ratio of the amount of power generated by the low-cost power plant and the distributed power source). The energy level EN becomes smaller.

  In other words, in this supply and demand management device, as the proportion of power generation by low-cost power plants and distributed power sources increases (in other words, the proportion of power generation by high-cost power plants and distributed power sources decreases), The power control command value (control command level) is set so that the power consumption at 30 (building 30A, building 30B, building 30C) increases. On the other hand, as the proportion of the amount of power generated by the high-cost power plant and the distributed power source increases (in other words, as the proportion of the amount of power generated by the low-cost power plant and the distributed power source decreases), the building 30 (building 30A, The power control command value (control command level) is set so that the power consumption in the building 30B and the building 30C is reduced.

  Thereby, according to the supply and demand management device 20, the supply and demand of electric power is supplied according to the cost of the electric power supplied from the plurality of distributed power sources 33 and 34 and the power plants GE1 and GE2 to the building 30 (building 30A, building 30B, building 30C). Can be managed.

  If the coefficient in the individual power plant index is “a numerical value determined according to the power generation cost of the power plant and distributed power source”, the latest thermal power generation is possible even for thermal power plants of the same power generation method. Since the power generation efficiency is different between the old power station and the old power station, the coefficient may be set in consideration of the power generation efficiency.

In addition, the coefficient may be a “value determined according to the greenhouse gas emissions of the power plant and the distributed power source”. In this case, the coefficient is set to a smaller value as the greenhouse gas emissions increase. As the greenhouse gas emissions become smaller, a larger value is set. Further, the coefficient may be “a numerical value determined according to the CO ₂ emission amount of the power plant and the distributed power source”. In this case, the coefficient is set to a smaller value as the CO ₂ emission amount becomes larger. _{2 A} larger value is set as the discharge amount decreases. In addition, the coefficient may be “a numerical value determined depending on whether the power plant is owned by the company and whether it is a distributed power source”. In this case, the coefficient is small when the power plant is owned by the company. If a value is set and the power plant is not owned by the company, a large value is set.

  Next, in the embodiment described above, the BEMS 20 calculates the power control command value (control command level) as a real-time instruction, and controls the load facility 31 and the charge / discharge control of the secondary battery 32. The present invention is not limited to such a form. For example, the instruction unit 11 of the BEMS 20 may be configured to calculate a power control command value (control command level) after the next day at the time of calculation as a power control command value (control command level).

Thus, by calculating the power control command value (control command level) on and after the next day at the time of calculation, the power consumption state on and after the next day can be determined in advance.
Next, in the above embodiment, the configuration has been described in which the BEMS 20 manages the three of the load facility 31, the secondary battery 32, and the distributed power source (distributed power source 33, 34) arranged in the building 30. It is not restricted to such a form. For example, the BEMS 20 may manage the load facility 31 and the secondary battery 32, or the BEMS 20 may manage the load facility 31 and the distributed power sources (distributed power sources 33 and 34). Alternatively, the BEMS 20 may manage only the load facility 31.

  Next, in the above-described embodiment, “BEMS 20 that manages the power consumption state of the building” has been described as the supply and demand management device, but the present invention is not limited to such a form. The supply and demand management device is not limited to the supply and demand management device (BEMS) for commercial buildings, but may be a supply and demand management device (HEMS) for ordinary houses and a supply and demand management device (FEMS) for factories. Further, the supply and demand management device is not limited to one type, and may be configured such that different types of supply and demand management devices are mixed.

  Furthermore, the supply and demand management device is not limited to a configuration in which one building is used as a consumer area, and may be configured to manage a power consumption state in one consumer area including a plurality of buildings. In addition, the type of building as a consumer area is not limited to a commercial building, and may be a building as an art museum or a museum. In particular, in a demand and supply management device that manages the power consumption state in museums and museums as a consumer area, the management status of the power consumption state is displayed in real time so that visitors can learn about power generation using natural energy. You may make it possible to confirm it. Moreover, as another customer area | region, the whole site | part of entertainment facilities, such as an amusement park, can be mentioned, for example.

  In addition, the entity that outputs various information such as individual power plant indicators (current power generation amount, etc.) of each power plant to the BEMS 20 is not limited to the power company, and supplies power of a specific scale electric power company or the like. It may be a business operator. Moreover, both an electric power company, a specific scale electric power company, etc. may be arrange | positioned.

  Next, the BEMS 20 (acquisition unit 13) is not limited to the configuration in which the reduction information is acquired from the load facility 31 or the secondary battery 32, and the reduction information stored in the CEMS 10 or the power companies 15A and 15B is stored in the CEMS 10 or The structure acquired from electric power companies 15A and 15B may be sufficient.

  In the first embodiment, the power control command value (control command level (control command level)) is set as the command value database (FIG. 4) in setting the allowable power consumption amount in the load facility 31 and the charge amount in the secondary battery 32. Although the command value database in the form of setting a value proportional to () has been described, the command value database is not limited to such a form. For example, as shown in FIGS. 10 and 11, the power consumption of the load facility and the secondary battery is divided into multiple stages (two stages, three stages, etc.) to correspond to the power control command value (control command level). You may set the power consumption according to a division | segmentation as an allowable value.

  For example, as shown in FIG. 10, when the allowable value of the power consumption of the load facility is divided into two stages, the allowable value of the power consumption of the load facility is “ON (power consumption: 100%)”. And “OFF (power consumption: 0%)” can be classified into two stages. Further, when the control state of the secondary battery is divided into two stages, it can be considered that the control state of the secondary battery is divided into two stages of “charge” and “discharge”. In the “charge” category, the secondary battery is controlled to be in a charged state, and in the “discharge” category, the secondary battery is controlled to be in a discharged state.

  Of these, in the “charge” category, as the power control command value (control command level) increases, a larger value is set for the amount of charge in the secondary battery. On the contrary, the power control command value (control command value) As the level becomes lower, a smaller value is set for the charge amount in the secondary battery. In the “discharge” category, as the power control command value (control command level) increases, a smaller value is set for the discharge amount in the secondary battery. On the contrary, the power control command value (control command level) As the level of) decreases, a larger value is set for the discharge amount in the secondary battery.

  Furthermore, as shown in FIG. 11, when the allowable value of the power consumption of the load facility is divided into three stages, the allowable value of the power consumption of the load facility is “strong (power consumption: 100%)”. , “Medium (power consumption: 50%)” and “Off (power consumption: 0%)” can be considered. Further, when the control state of the secondary battery is divided into three stages, it is conceivable that the control state of the secondary battery is divided into three stages of “charge”, “charge / discharge stop”, and “discharge”. In the “Charge” category, the secondary battery is controlled to be charged. In the “Charge / Discharge Stop” category, the secondary battery is controlled to be neither charged nor discharged, and the “Discharge” category. In, the secondary battery is controlled to a discharged state.

  Of these, in the “charge” category, as the power control command value (control command level) increases, a larger value is set for the amount of charge in the secondary battery. On the contrary, the power control command value (control command value) As the level becomes lower, a smaller value is set for the charge amount in the secondary battery. In the “discharge” category, as the power control command value (control command level) increases, a smaller value is set for the discharge amount in the secondary battery. On the contrary, the power control command value (control command level) As the level of) decreases, a larger value is set for the discharge amount in the secondary battery. Further, in the “charge / discharge stop” category, the secondary battery is controlled to be neither charged nor discharged regardless of the level of the power control command value (control command level).

  DESCRIPTION OF SYMBOLS 1 ... Supply-and-demand management system, 11 ... Instruction part, 12 ... Memory | storage part, 13 ... Acquisition part, 14 ... Output part, 16 ... Power transmission system, 20 ... Supply-and-demand management apparatus (BEMS), 21 ... Control part, 30 (30A, 30B 30C) ... Building, 31 ... Load facility, 32 ... Secondary battery, 33 ... First distributed power source, 34 ... Second distributed power source, 35 ... Communication path, GE1, GE2 ... Power plant.

Claims (8)

A supply and demand management device for managing a power consumption state in a consumer area that consumes power supplied from a plurality of power plants by at least one electric load,
A power characteristic index calculating unit for calculating a power characteristic index indicating a characteristic of electric power supplied from the plurality of power plants to the consumer area, using an individual power plant index indicating a characteristic of each of the plurality of power plants; ,
A command value calculation unit for calculating a command value including at least an allowable value of power consumption in the electric load, using at least the power characteristic index;
A load control unit for controlling the electric load so that the power consumption at the electric load is equal to or less than the allowable value;
With
The individual power plant index includes at least an estimated power generation amount estimated based on weather information including at least one of solar radiation and wind power at the power plant,
The power characteristic index calculation unit uses all the estimated power generation amounts in the plurality of power plants when calculating the power characteristic index.
Supply and demand management device characterized by. The individual power plant index includes at least a clean energy power amount that is a power amount generated by clean energy,
The power characteristic index calculation unit uses all the clean energy power amounts in the plurality of power plants when calculating the power characteristic index.
The supply and demand management apparatus according to claim 1. The individual power plant index includes at least a transmission distance that is a distance between the power plant and the customer area,
The power characteristic index calculating unit uses all the transmission distances in the plurality of power plants when calculating the power characteristic index;
The supply and demand management device according to claim 1 or 2, wherein The power characteristic index calculation unit uses all the power generation facility capacities in the plurality of power plants when calculating the power characteristic index.
The supply and demand management device according to any one of claims 1 to 3, wherein: When calculating the power characteristic index, the power characteristic index calculation unit calculates a power generation cost at the plurality of power plants, a greenhouse gas emission amount at each of the plurality of power plants, and a CO at each of the plurality of power plants. _{2 Use} at least one of emissions, information on whether each of the plurality of power plants is a power plant owned by the company,
The supply and demand management device according to any one of claims 1 to 4, characterized by : The command value calculation unit calculates a command value after the next day at the time of calculation as the command value;
Supply management device as claimed in any one of claims 1 to 5, characterized in. A set power comparison unit that compares the demand power amount in the electric load with a predetermined set power amount;
The load control unit
When the demand power amount is determined to be equal to or less than the set power amount in the set power comparison unit, the electric load is controlled so that the power consumption at the electric load is equal to or less than the allowable value,
When the set power comparison unit determines that the demand power amount is larger than the set power amount, the electric load is controlled such that the power consumption at the electric load is equal to or less than the set power amount. To do,
The supply and demand management device according to any one of claims 1 to 6, characterized by: An allowable power amount calculation unit for calculating an allowable power amount based on the power characteristic index;
A power comparison unit that compares the demand power amount at the electrical load with the allowable power amount, and
When the power comparison unit determines that the demand power amount is larger than the allowable power amount, the command value calculation unit uses a difference value obtained by subtracting the allowable power amount from the demand power amount. A command value including at least an allowable value of power consumption at the electric load is calculated, and the load control unit controls the electric load so that the power consumption at the electric load is equal to or less than the allowable value. And
When the power comparison unit determines that the demand power amount is equal to or less than the allowable power amount, the load control unit does not control the electric load using the command value;
The supply and demand management device according to any one of claims 1 to 7, characterized by:

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