JP6956015B2 - Power management system and power management method - Google Patents

Description

The present invention relates to a power management system and a power management method.

The electric power management system described in Patent Document 1 manages electric power for a factory by using a storage battery system and a photovoltaic power generation system that can supply electric power to the factory. At that time, in this power management system, the power demand of the factory is predicted based on the power generation amount prediction, the production plan, etc., and the production plan is adjusted according to the predicted power demand. Then, the discharge plan of the storage battery system is adjusted so that the adjusted power demand does not exceed the target value.

Japanese Unexamined Patent Publication No. 2014-85981

Patent Document 1 describes that a storage battery system, a solar power generation system, or the like that supplies electric power to a factory may be provided inside the factory or may be provided outside. However, there is no description of how to supply power when it is installed externally. For example, when power is supplied to a factory from a plurality of storage batteries or a plurality of power generation facilities provided in a plurality of houses outside the factory, when power is supplied through the distribution system to which each house is connected, reverse power flow in the distribution system There is a problem that the constraint on electric power must be satisfied.

The present invention has been made in view of the above circumstances, and provides a power management system and a power management method capable of easily managing the power supply from the outside to the factory and the reverse power flow to the distribution system. The purpose is to do.

In order to solve the above problems, one aspect of the present invention is a system for managing the supply and demand of electric power by a plurality of consumer facilities connected to a predetermined distribution system, wherein the plurality of consumer facilities are power storage facilities or Hourly, including a plurality of first consumer facilities having at least one of the power generation facilities and one or more second consumer facilities which are facilities for producing goods using electric power, based on the production plan. A reverse power flow power amount determination unit that determines a planned value of the reverse power flow power amount to be reverse power flow from the plurality of consumer facilities to the distribution system according to the power demand forecast related to the production for each time, and the reverse It is a power management system including an allocation unit that individually allocates a planned value of the reverse power flow power amount determined by the power flow power amount determination unit to the plurality of consumer facilities.

Further, one aspect of the present invention is the power management system, in which the production plan is determined based on a predicted value of the amount of power that is reversely flowed from the plurality of consumer facilities to the distribution system. Is.

Further, one aspect of the present invention is a charge / discharge system in which the consumer facility having the power storage facility controls the charge / discharge power amount of the power storage facility based on the result of the allocation by the allocation unit. It has a control unit.

Further, one aspect of the present invention is the power management system in which the amount of reverse power flow to each consumer facility is increased so that the allocation unit satisfies a predetermined condition relating to the reverse power flow of the distribution system. Adjust the allocation of planned values.

Further, one aspect of the present invention is a method of managing the supply and demand of electric power by a plurality of consumer facilities connected to a predetermined distribution system, wherein the plurality of consumer facilities are at least one of a power storage facility and a power generation facility. Based on the production plan by the reverse power flow determination unit, including a plurality of first consumer facilities having the above and one or a plurality of second consumer facilities which are facilities for producing goods by using electric power. According to the hourly power demand forecast for the production, the planned value of the amount of reverse power flow power to be reverse power flowed from the plurality of consumer facilities to the distribution system is determined for each hour, and the reverse flow is determined by the allocation unit. This is a power management method in which a planned value of the reverse power flow power amount determined by the power flow power amount determination unit is individually assigned to the plurality of consumer facilities.

According to the present invention, it is possible to easily manage the power supply from the outside to the second consumer facility such as a factory and the reverse power flow to the distribution system.

It is a schematic diagram which shows the structural example of the electric power management system which concerns on one Embodiment of this invention. It is a block diagram for demonstrating the configuration example of the electric power management apparatus 10, the consumer facility 20-1 to 20-7, and the consumer facility 30-1 shown in FIG. FIG. 1 is a schematic diagram showing an example of connection between the consumer facility 20-1 to 20-7 and the consumer facility 30-1 to the power transmission and distribution system. It is a flowchart which shows the operation example of the power management system 1 shown in FIG. 1 and FIG. It is a schematic diagram for demonstrating the operation example of the power management system 1 shown in FIG. 1 and FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a configuration example of a power management system according to an embodiment of the present invention. The power management system 1 shown in FIG. 1 includes a power management device 10 and a plurality of consumer facilities 20-1, 20-2, 20-3, ..., 20-7, ... (First consumer facility). The customer facility 30-1, ... (second customer facility) is provided. The consumer facilities 20-1, 20-2, 20-3, ..., 20-7, ... Are, for example, ordinary household houses and the like, and correspond to low-voltage consumers and the like. Consumer facilities 30-1, ... Are, for example, factories and the like, facilities that produce goods using electric power, and correspond to, for example, small-lot consumers, large-lot consumers, and the like. In addition, a plurality of consumer facilities 20-1, 20-2, 20-3, ..., 20-7, ... Have storage batteries 21-1, 21-2, 21-3, ..., 21-7, ..., Respectively. Have. The consumer facility 30-1, ... Has a storage battery 31-1, ... Hereinafter, a plurality of consumer facilities 20-1, 20-2, 20-3, ..., 20-7, ... may be referred to as each consumer facility 20 (or, in the case of one, the consumer facility 20). Similarly, the storage batteries 21-1, 21-2, 21-3, ..., 21-7, ... May be collectively referred to as the storage battery 21. Further, a plurality of consumer facilities 30-1, ... Are referred to as each consumer facility 30 (or, in the case of one, the consumer facility 30). Similarly, the storage batteries 31-1, ... May be collectively referred to as the storage battery 31.

Further, FIG. 2 is a block diagram for explaining a configuration example of the power management device 10, the consumer facility 20, and the consumer facility 30 shown in FIG.

In the present embodiment, the electric power management device 10 is, for example, a computer such as a server operated by a business operator (aggregator) that trades with a parent aggregator such as an electric power company or an electric power company. The electric power management device 10 is used to manage the supply and demand of electric power in each consumer facility 20 and each consumer facility 30, for example, in correspondence with the planned value simultaneous equal amount system. In this case, the operator of the electric power management device 10 formulates a power supply and demand plan for each customer facility 20 and each customer facility 30 as a whole for each predetermined unit planning time (for example, 30 minutes), and the formulated electric power. Submit the supply and demand plan to the general power transmission and distribution business operator. In addition, if the actual power supply and demand in each customer facility 20 and each customer facility 30 as a whole causes an excess or deficiency (imbalance) with respect to the power supply and demand plan, the electric power company and the general power transmission and distribution business operator Settlement corresponding to imbalance (imbalance settlement) is performed between them.

The power supply and demand plan in this embodiment includes a reverse power flow plan and a demand plan. The "reverse power flow plan" is generally called a "power generation plan". In this embodiment, the wording "reverse power flow plan" is used to distinguish it from a power generation plan (prediction of power generation) by a power generation facility such as a photovoltaic power generation system. The reverse power flow plan may have a planned value of each consumer facility 20 and each consumer facility 30 as a whole, or an individual planned value of the consumer facility 20 and the consumer facility 30 for the electric power to be reverse power flowed to the distribution system. The demand plan may have a planned value of each consumer facility 20 and each consumer facility 30 as a whole for electric power purchased from the distribution system in a forward flow, or an individual planned value of the consumer facility 20.

Under the planned value simultaneous equal amount system corresponding to this embodiment, it is required that the actual results for each of the reverse power flow plan and the demand plan are achieved as planned. That is, in the planned value simultaneous equal amount system corresponding to this embodiment, for example, the actual power flowed back to the distribution system from each customer facility 20 and each customer facility 30 is excessive or insufficient with respect to the reverse power flow plan. It is required that there is no excess or deficiency with respect to the demand plan, as well as the fact that each consumer facility 20 and each consumer facility 30 as a whole receives the forward power flow. In the present embodiment, the reverse power flow power means the power to be reverse power flowed to the distribution system. In addition, the demand power refers to the power that flows forward from the distribution system. In the present embodiment, the reverse power flow power includes the power generated by the power generation facility 25 and the power discharged by the storage battery 21, and also includes the power generated by the power generation facility 35 and the power discharged by the storage battery 31 (FIG. 2). ).

The electric power management device 10 executes electric power control for the electric power facilities in each consumer facility 20 and each consumer facility 30 as a whole based on the reverse power flow plan and the demand plan. The power management device 10 is connected to each of the consumer facilities 20 and the consumer facilities 30 via a communication line 40 so as to be able to communicate with each other. As a result, the power management device 10 can transmit the power equipment control command 401 and control the operation of the power equipment included in each customer facility 20 and each customer facility 30.

Further, the power management device 10 formulates a production plan for each consumer facility 30, and transmits the production plan information 402 indicating the formulated production plan to each consumer facility 30. The production plan is, for example, information indicating a future production amount of goods, specifications of goods, production order, date and time of production, power consumption, and the like at predetermined time intervals. The power management device 10 is based on the predicted value of the hourly reverse power flow electric energy that can be supplied to each consumer facility 30, for example, the amount of electric power consumed in the production of goods at each consumer facility 30 every hour. However, the production plan can be determined so as to be within the range of the predicted value or within the range of the predetermined value from the predicted value. The power management device 10 also stores the determined production plan in the storage unit 13 as the production plan information 133.

Further, the electric power management device 10 reverse-feeds the electric power from each consumer facility 20 and each consumer facility 30 to the distribution system according to the demand forecast of the electric power related to the hourly production based on the production plan in each consumer facility 30. Determine the planned value of reverse power flow power amount every hour. Then, the power management device 10 individually allocates the determined reverse power flow electric energy planned value to each customer facility 20 and each customer facility 30. The power management device 10 transmits the hourly reverse power flow electric energy plan value (command value) as a result of this allocation to each customer facility 20 and each customer facility 30 as one element of the power equipment control command 401. do.

Further, the power management device 10 is connected to the host control system 50 via a communication line 60 so as to be able to communicate with each other. The power management device 10 receives from the host control system 50, for example, information indicating a predetermined condition relating to reverse power flow of the distribution system to which each consumer facility 20 and each consumer facility 30 are connected. The predetermined condition relating to the reverse power flow of the distribution system is, for example, the power or the limit value of the amount of power that can be reverse power flow for each predetermined range of the distribution system for each predetermined time. The predetermined range can be set, for example, in association with distribution lines, transformers, substations, etc., which are components of the distribution system. The power management device 10 adjusts, for example, a planned value of the amount of power that is reverse power flowed from each customer facility 20 and each customer facility 30 to the distribution system so as to satisfy a predetermined condition relating to reverse power flow of the distribution system. ..

Further, the power management device 10 in the present embodiment bundles a plurality of consumers (each consumer facility 20 and each consumer facility 30) to reduce demand or increase demand by DR (Demand Response) (collectively, demand change). Also called) is used to manage. DR is to change the power consumption pattern so that consumers can curb the use of electricity in response to the setting of electricity price or the payment of incentives when the wholesale market price rises or the grid reliability declines. It is defined. In this case, the power management device 10 makes a request for power adjustment (request for power adjustment) at each customer facility 20 or each customer facility 30 from the upper control system 50 (computer such as a server) operated by the parent aggregator. Receive via 60. For example, the power management device 10 selects one or more storage batteries 21 or storage batteries 31 in response to a received power adjustment request, and each customer facility 20 or each customer having each selected storage battery 21 or storage battery 31. A predetermined power equipment control command 401 is transmitted to the facility 30 via the communication line 40 to control charging / discharging in each selected storage battery 21 or storage battery 31.

In the present embodiment, the request for power adjustment includes a request for reducing demand and a request for increasing demand for each customer facility 20 and each customer facility 30 managed by the power management device 10. In addition, the request for demand reduction includes a request for reduction of power flow power and a request for increase of reverse power flow power. Further, the request for power adjustment may include a content that directly indicates a change in charge / discharge power, discharge power, or charge power in the storage battery 21 or the storage battery 31.

Further, the power management system 1 can be configured in a form (for example, as one function) included in a power management system such as TEMS (Town Energy Management System) or CEMS (Community Energy Management System). Further, the power management device 10 can be configured (for example, as one function) in a form included in a management device (management server) in a power management system such as TEMS or CEMS. Here, TEMS and CEMS are systems that collectively manage electric power in each consumer facility 20 such as a residential, commercial facility, and industrial facility and each consumer facility 30 in a predetermined area range, for example. In this case, the power management device 10 manages (predicts and controls) the charge / discharge power of the plurality of storage batteries 21 and the storage batteries 31 of each customer facility 20 and each customer facility 30, and also, for example, the power generated by the power generation facility. It can be configured as a device that manages (prediction and control) and manages the power consumption of load equipment (prediction and control). Further, the consumer facility 20 and the consumer facility 30 managed by the power management device 10 may include a consumer facility that does not have a storage battery. In addition, in this embodiment, a predetermined area range may be formed by one area range, or may be formed by a plurality of geographically discrete area ranges.

On the other hand, in the configuration example shown in FIG. 2, the consumer facility 20 includes a communication unit 24, a control device 22, a distribution board 23, a storage battery 21, a power generation facility 25, a power load facility 26, and a power meter 28.

The communication unit 24 transmits and receives predetermined information to and from the power management device 10 via the communication line 40. The communication line 40 is composed of a communication line 43, a network 41 such as the Internet, and a communication line 42 and a communication line 44.

The control device 22 is a computer, and by executing a predetermined program, it constitutes a power control unit 221 and a charge / discharge control unit 222, which are functional blocks. The power control unit 221 controls electrical equipment (power generation equipment 25, storage battery 21, power load equipment 26, communication unit 24, etc.). Further, the power control unit 221 can input the power consumption information measured by the power meter 28, for example, and use the input power consumption information for various controls. The charge / discharge control unit 222 is a power generation facility based on the hourly reverse power flow electric energy planned value (command value) (information included in the power facility control command 401) assigned to the consumer facility 20 by the power management device 10. The charge / discharge electric energy of the storage battery 21 is determined according to the power generation prediction of the 25 and the power consumption forecast of the power load facility 26, and the charge / discharge electric energy of the storage battery 21 is controlled by issuing an instruction to the power control unit 221.

In the present embodiment, among the storage battery 21, the power generation facility 25, and the power load facility 26 included in the consumer facility 20, those that can be controlled by the power management device 10 via, for example, the control device 22 are referred to as power facilities. In the present embodiment, the charging power and the discharging power of the storage battery 21 are controlled by the power management device 10. Further, the generated power of a part or all of the power generation facility 25 may be controllable by the power management device 10. Further, the power consumption of a part or all of the power load equipment 26 may be controllable by the power management device 10. That is, the storage battery 21, the power generation facility 25 and the power load facility 26 that can be controlled by the power management device 10 are power facilities. The control device 22 controls the charge / discharge power, the generated power, the power consumption, and the like of the power equipment provided in the consumer facility 20 in accordance with the power equipment control command 401 received from the power management device 10.

The control device 22 also collects power-related information in the consumer facility 20. The control device 22 can collect information on the supply and demand power measured by the power meter 28, for example. Further, the control device 22 can collect the power generated by the power generation facility 25, the remaining capacity (stored power) and charge / discharge power of the storage battery 21, the load power (power consumption) by the power load facility 26 and the like. The control device 22 also manages the collected information such as generated power, charge / discharge power, demand power, supply / supply power, etc. from the communication unit 24 at predetermined time intervals or in response to a request from the power management device 10. It is transmitted to the device 10.

The distribution board 23 distributes the electric power supplied from the service line 71 via the electric power meter 28 to the storage battery 21, the electric load equipment 26, and the like via the wiring 27 and supplies the electric power. The drop line 71 is a component of the distribution system on the general power transmission and distribution business operator side. Further, the distribution board 23 can output the electric power output from the power generation facility 25 or the like to the service line 71 via the electric power meter 28 due to reverse power flow.

The storage battery 21 is a power storage facility that stores electric power input for charging and discharges and outputs the stored electric power. The storage battery 21 includes, for example, a secondary battery and an inverter. The storage battery 21 stores (charges) electric power and outputs (discharges) the stored electric power. The inverter converts the electric power for charging the secondary battery from alternating current to direct current, and converts the electric power output from the secondary battery by discharge from direct current to alternating current. That is, the inverter performs bidirectional conversion of the power input / output of the secondary battery. The charge / discharge power of the storage battery 21 is controlled by the control device 22.

The storage battery 21 can be charged by inputting the electric power of the commercial power supply supplied through the distribution board 23. Further, the storage battery 21 can be charged by inputting the electric power generated by the power generation facility 25. Further, the storage battery 21 can supply the stored electric power as a power source for the power load equipment 26. Further, the storage battery 21 can reverse power flow by outputting the stored electric power from the distribution board 23 to the service line 71 via the electric power meter 28.

The power generation facility 25 is, for example, a facility that receives sunlight to generate power. The power generation facility 25 includes, for example, a solar cell and a PCS (Power Conditioning System). The power generation facility 25 receives sunlight to generate power, converts the power obtained by the power generation into alternating current by PCS, and outputs the power.

The electric power generated by the power generation facility 25 can be supplied as a power source for the power load facility 26. Further, the electric power generated by the power generation facility 25 can be charged to the storage battery 21. Further, the electric power generated by the power generation facility 25 can be reverse-flowed by being output from the distribution board 23 to the drop line 71 via the electric power meter 28.

The power generation facility 25 and the storage battery 21 may have an integrated configuration such as a power conversion circuit.

The electric power load facility 26 collectively indicates one or a plurality of predetermined devices and facilities that consume electric power for their own operation in the consumer facility 20. The type and number of devices, equipment, and the like as loads provided by each consumer facility 20 may be different. The power load equipment 26 can operate by inputting the commercial power supply supplied from the distribution board 23. Further, the electric power load facility 26 can operate by inputting the electric power generated by the power generation facility 25. Further, the power load equipment 26 can operate by inputting the power output from the storage battery 21.

Further, the power load equipment 26 includes a load whose power consumption can be controlled by a control device 22 or the like, such as a hot water storage type water heater, a heat storage type air conditioner, a clothes dryer, a dish dryer, a storage battery (load as a charging target), and the like. You may.

The watt-hour meter 28 measures the demand power and the reverse power flow power. That is, the watt-hour meter 28 measures the supply and demand power. The supply and demand power is, for example, the difference between the demand power and the reverse power flow power. In the consumer facility 20, the electric power supplied from the drop line 71 to the distribution board 23 is the demand electric power. On the other hand, the power output from the storage battery 21 and the power generation facility 25 and supplied from the distribution board 23 to the service line 71 via the power meter 28 is reverse power flow power. When the forward power flow corresponding to the demand power is set to the positive direction, if the reverse power flow corresponding to the reverse power flow is smaller than the demand power corresponding to the forward power flow, the supply and demand power is measured as a positive value and is relative to the demand power. If the reverse power flow is large, the supply and demand power is measured as a negative value. Further, the watt-hour meter 28 includes, for example, a demand meter that measures the demand power used in one consumer facility 20, and a power generation facility 25 that uses natural energy such as a solar power generation device in one consumer facility 20. It is equipped with a power generation meter that measures the generated power generated by.

The power meter 28 may be used as a smart meter, for example, so that the measured power supply and demand information can be transmitted to the power management device 10 via the network 41 or the like. In this case, the control device 22 does not have to collect the supply and demand power measured by the power meter 28.

The consumer facility 20 may include either a storage battery 21 or a power generation facility 25. Further, the consumer facility 20 may be provided with neither the storage battery 21 nor the power generation facility 25. Further, the power generation facility 25 is not limited to one using a solar cell, and may be a power generation device that generates power by using other renewable energy (natural energy) such as wind power generation and geothermal power generation, or a combination thereof. ..

Further, the storage battery 21 and the power generation facility 25 included in the consumer facility 20 are grid-connected to the commercial power source. As a result, the consumer facility 20 provided with the storage battery 21 or the power generation facility 25 outputs the power generated and output by the power generation facility 25 or the power output by the storage battery 21 by discharging to the power system (including the transmission system and the distribution system) of the commercial power source. ) Can be reverse-powered and sold through the power system.

On the other hand, the consumer facility 30 includes a communication unit 34, a control device 32, a distribution board 33, a storage battery 31, a power generation facility 35, a power load facility 36, and a power meter 38. The power load facility 36 includes a production facility 361 and an electrical device 362. The production facility 361 is a facility for producing an article by using electric power, and includes one or a plurality of manufacturing facilities, manufacturing tools, and the like. The amount of electric power consumed by the production equipment 361 changes depending on, for example, the production amount of the goods, the operating time of the production equipment 361, and the production status of the goods. The electric device 362 includes a plurality of types of electric devices such as lighting devices, air conditioners, and computers.

The communication unit 34 transmits and receives predetermined information to and from the power management device 10 via the communication line 44, the network 41, and the communication line 42.

The control device 32 is a computer, and by executing a predetermined program, it constitutes a production control unit 321 which is a functional block, a power control unit 322, and a charge / discharge control unit 323. The production control unit 321 manages the production plan of the goods using the production facility 361. The production plan is formulated in, for example, the power management device 10, and is transmitted from the power management device 10 to each control device 32 as production plan information 402. The production control unit 321 compares, for example, the production plan and the production record, transmits the comparison result and the like to the power management device 10, and transmits and receives a predetermined control signal to and from the production facility 361 based on the production plan. To do.

The power control unit 322 controls electrical equipment (power generation equipment 35, storage battery 31, all or part of power load equipment 36, communication unit 24, etc.). Further, the power control unit 322 can input information on the power consumption measured by the power meter 38, for example, and use the input power consumption information for various controls. The charge / discharge control unit 323 responds to the power generation prediction of the power generation facility 35 and the power consumption prediction of the power load facility 36 based on the hourly reverse power flow electric energy planned value assigned to the consumer facility 30 by the power management device 10. The charge / discharge electric energy of the storage battery 31 is determined, and an instruction is given to the power control unit 322 to control the charge / discharge electric energy of the storage battery 31.

In the present embodiment, among the electric devices 362 of the storage battery 31, the power generation facility 35, and the power load facility 36 provided in the consumer facility 30, those that can be controlled by the power management device 10 via, for example, the control device 32 are the power facilities. Called. In the present embodiment, the charging power and the discharging power of the storage battery 31 are controlled by the power management device 10 or the control device 32. Further, the generated power of a part or all of the power generation facility 25 may be controllable by the power management device 10. Further, the power consumption of a part or all of the electric equipment 362 of the power load equipment 36 may be controllable by the power management device 10. That is, the storage battery 31, the power generation facility 35 and the power load facility 36 that can be controlled by the power management device 10 are power facilities. The control device 32 controls the charge / discharge power, the generated power, the power consumption, and the like of the power equipment provided in the consumer facility 30 in accordance with the power equipment control command 401 received from the power management device 10.

The control device 32 also collects power-related information in the consumer facility 30. The control device 32 can collect information on the supply and demand power measured by the power meter 38, for example. Further, the control device 32 can collect the power generated by the power generation facility 35, the remaining capacity (stored power) and charge / discharge power of the storage battery 31, the load power (power consumption) of the power load facility 36 and the like. The control device 32 also manages the collected information such as generated power, charge / discharge power, demand power, supply / supply power, etc. from the communication unit 34 at predetermined time intervals or in response to a request from the power management device 10. It is transmitted to the device 10.

The distribution board 33 connects the electric power supplied from the distribution line (or drop line) 72 to the storage battery 31, the power load facility 36, and the like via the power meter 38, a transformer, a switch, and the like (not shown). Distribute and supply through. The distribution line 72 is a component of the distribution system on the general power transmission and distribution business operator side. Further, the distribution board 33 can output the electric power output from the power generation facility 35 or the like to the distribution line 72 via the electric power meter 38 due to reverse power flow.

The storage battery 31, the power generation facility 35, and the power meter 38 have the same configurations as the storage battery 21, the power generation facility 25, and the power meter 28 included in the consumer facility 20, and description thereof will be omitted.

The consumer facility 30 may include either a storage battery 31 or a power generation facility 35. Further, the consumer facility 30 may be provided with neither the storage battery 31 nor the power generation facility 35. Further, the power generation facility 35 is not limited to one using a solar cell, and may be a power generation device that generates power using other renewable energies such as wind power generation and geothermal power generation, or a combination thereof.

In general, commercial power is distributed to the consumer facility 20 from a pillar transformer, a road transformer, or the like connected to the high-voltage distribution line of the distribution system via the low-voltage distribution line. Commercial power is distributed directly to 30, for example, from a high-voltage distribution line.

On the other hand, the power management device 10 includes a communication unit 11, a control device 12, and a storage unit 13.

The communication unit 11 communicates with the control device 22 in the consumer facility 20 and the control device 32 in the consumer facility 30 via the communication line 40. Further, the communication unit 11 communicates with the host control system 50 (FIG. 1) via the communication line 60. The communication line 60 may also be configured via a network 41 such as the Internet, like the communication line 40.

The storage unit 13 stores information used by the control device 12 for power management. The storage unit 13 of the present embodiment stores reverse power flow plan information 131, demand plan information 132, production plan information 133, consumer facility basic information 134, and distribution system connection information 135.

The reverse power flow plan information 131 is information indicating the amount of reverse power flow power for each hour according to the reverse power flow plan. The demand plan information 132 is information indicating the amount of power demanded for each hour according to the demand plan. The production plan information 133 is information indicating the hourly production amount at each customer facility.

The consumer facility basic information 134 includes basic information about each consumer facility 20 and each consumer facility 30. For example, the basic information of the customer facility corresponding to one customer facility 20 includes the customer facility ID (identification code) uniquely indicating the customer facility 20, the value of the contracted power of the customer facility 20, and the power generation facility 25. Rated output value, rated power (rated output) value (rated charge / discharge power value, rated discharge power value and rated charge power value) and capacity of the storage battery 21, power load equipment provided in the consumer facility 20 Information about the 26 and information such as the address of the communication unit 24 and the control device 22 included in the consumer facility 20 are included. Regarding the consumer facility basic information 134, for each consumer facility 30, in addition to the same information as each consumer facility 20, for example, the relationship between the production amount and the power consumption, the planned production amount of the goods, the specifications of the goods, and the production order. , Production date and time, power consumption, etc. are included. The consumer facility basic information 134 is appropriately updated in response to a request from the consumer facility 30, for example.

The distribution system connection information 135 represents information indicating the position or component of the distribution system to which each consumer facility 20 and each consumer facility 30 are connected. The components of the distribution system are, for example, distribution substations, banks in distribution substations, extra-high distribution lines, high-voltage distribution lines or low-voltage distribution lines, transformers (pole transformers, road transformers, etc.), breakers, drop lines. Etc. are included. The components of these distribution systems are installed in or on land-based structures. Therefore, the information that identifies the component can be the information that identifies a certain area or point (that is, position) in the distribution system. The position of the distribution system may be represented by coordinate information in the coordinate system, information indicating a lot number, or the like. In this case, the connected components can be specified by matching the coordinate information and lot number of the components of the distribution system. The distribution system connection information 135 may include information indicating one or more components. Here, a configuration example of the distribution system connection information 135 will be described with reference to FIG. FIG. 3 is a schematic diagram showing an example of connection of the consumer facility 20-1, ... And the consumer facility 30-1, ... Shown in FIG. 1 to the distribution system.

The power transmission / distribution system 700 shown in FIG. 3 includes a power transmission system 7-1, a power distribution system 70-1, and a power distribution system 70-2. The power transmission system 7-1 includes a plurality of power transmission lines connecting a plurality of power plants and a plurality of distribution substations. The distribution system 70-1 includes components such as a distribution substation and an intermediate substation connected to the transmission system 7-1, a plurality of distribution lines, a plurality of circuit breakers, a plurality of transformers, and a plurality of service lines. Be prepared. The distribution system 70-2 includes components such as distribution substations and intermediate substations connected to the transmission system 7-1, multiple distribution lines, multiple circuit breakers, multiple transformers, and multiple drop lines. Be prepared. The distribution system connection information 135 is, for example, the consumer facilities 20-1, 20-2, 20-3, and 20-4, and the transmission system 7- which is a component of the distribution system 70-1 or the distribution system 70-1. Includes information that associates distribution substations and intermediate substations connected to 1, multiple distribution lines, multiple circuit breakers, multiple transformers, multiple drop lines, and the like. Further, the distribution system connection information 135 includes, for example, the consumer facilities 20-5, 20-6, and 20-7, the consumer facility 30-1, and the components of the distribution system 70-2 or the distribution system 70-2. It includes information for associating distribution substations and intermediate substations connected to the power transmission system 7-1, distribution lines of a plurality of systems, a plurality of circuit breakers, a plurality of transformers, a plurality of service lines, and the like.

The distribution system connection information 135 may be configured in a form included in the consumer facility basic information 134, or may be configured in a form in which a part is shared.

On the other hand, the control device 12 is a computer, and by executing a predetermined program, it constitutes a power control unit 121, a reception unit 122, a reverse power flow power amount determination unit 123, and an allocation unit 124, which are functional blocks.

The electric power control unit 121 is based on the reverse power flow plan information 131 and the demand plan information 132 stored in the storage unit 13 and the actual value (actual measurement value) of the electric power supply and demand in each customer facility 20 and each customer facility 30. Each electric power equipment control command 401 for each customer facility 20 and each customer facility 30 is generated, and each generated electric power equipment control command 401 is transmitted to each customer facility 20 and each customer facility 30, and each customer. It controls the electric power equipment in the facility 20 and each consumer facility 30.

The receiving unit 122 transmits information indicating a request for power adjustment at a predetermined request time from the upper control system 50 operated by a power company or the like, which is a parent aggregator, and a predetermined condition related to reverse power flow of the distribution system via the communication unit 11. To receive. The predetermined requested time is the time when the power adjustment, that is, the demand reduction or the demand increase is requested, and is defined by, for example, the start time and the end time or the start time and the duration. The request for electric power adjustment includes information indicating the requested time for electric power adjustment, the value of electric power for which demand reduction or demand increase is requested, the value of electric energy, etc. in response to the request by DR.

The reverse power flow electric energy determination unit 123 is, for example, based on the reverse power flow plan information 131, past results, weather forecast, etc., and each reverse from each customer facility 20 and each customer facility 30 on a certain day (for example, the next day). Predict the total value for one day of the total value of power flow power. Here, the total value is a value obtained by totaling the amount of reverse power flow from each customer facility 20 and each customer facility 30 at a predetermined time. In addition, the total value is a value obtained by totaling the total value of each time for one day. Next, the reverse power flow power amount determination unit 123 determines the planned value of the daily production amount of each consumer facility 30 based on the total value for one day of the predicted value of the total value of the reverse power flow power amount. do. Next, the reverse power flow electric energy determination unit 123 determines the production amount for each predetermined time for each customer facility 30 based on the planned value of the daily production amount. The production amount for each predetermined time is the production plan. The reverse power flow electric energy determination unit 123 allocates the production amount for each predetermined time from the production start time to the production end time, excluding the time zone of the lunch break, for example. The reverse power flow electric energy determination unit 123 stores the determined production plan as production plan information 133 in the storage unit 13.

Further, the reverse power flow electric energy determination unit 123 refers to the production plan information 133, and according to the demand forecast of the electric power related to the hourly production based on the production plan of each consumer facility 30, a plurality of consumer facilities 20 The planned value of the amount of reverse power flow power to be reverse power flowed from one or a plurality of consumer facilities 30 to the distribution system is determined for each hour. For example, the reverse power flow electric energy determination unit 123 corresponds to the total value of each customer facility 20 and each customer facility 30 of the predicted value of the reverse power flow electric energy at each time, corresponding to the electric power demand prediction related to the production at each time. By distributing the power to each time, the planned value of the reverse power flow amount for each time is determined. For example, the reverse power flow power amount determination unit 123 sets the average reverse power flow power to 60% or the like during the time zone when the operating rate does not increase due to a lunch break or the like, and sets the other time to 100% or the like. That is, the reverse power flow power amount determination unit 123 determines the planned value so that the average reverse power flow power per hour decreases, for example, when the production amount decreases.

The reverse power flow power amount determination unit 123 consumes, for example, the hourly reverse power flow power amount predicted by each customer facility 20 at each customer facility 20 from the predicted value of the power generation amount generated by each power generation facility 25. It can be calculated by subtracting the predicted value of the electric energy to be generated. Alternatively, the reverse power flow electric energy determination unit 123 is based on the premise that, for example, the power consumed by the power load facility 26 or the like in each consumer facility 20 is covered by the forward power flow power (power purchase power) from the grid. The hourly reverse power flow power amount predicted at each consumer facility 20 can be used as the predicted value of the power generation amount generated by each power generation facility 25.

Further, the reverse power flow power amount determination unit 123, for example, determines the hourly reverse power flow power amount predicted by each customer facility 30 from the predicted value of the power generation amount generated by each power generation facility 35, respectively. It can be calculated by subtracting the predicted value of the amount of electric energy consumed by a load other than the production equipment 361 such as the electric device 362. Alternatively, the reverse power flow electric energy determination unit 123 uses, for example, the forward power flow power (power purchase power) from the grid to be consumed by a load other than the production equipment 361 such as each electric device 362 in each consumer facility 30. On the premise that it can be covered, the hourly reverse power flow electric energy predicted by each consumer facility 30 can be used as the predicted value of the electric energy generated by each power generation facility 35.

The allocation unit 124 individually allocates the planned value of the reverse power flow power amount determined by the reverse power flow power amount determination unit 123 to each of the plurality of customer facilities 20 and each customer facility 30. The allocation unit 124 can, for example, evenly allocate the average reverse power flow power for each time to each customer facility 20. Further, when allocating the reverse power flow amount, the allocation unit 124 makes a power generation prediction by each power generation facility 25 and each power generation facility 35, and a demand prediction at each customer facility 20 and each customer facility 30, and obtains the prediction result. The allocation rate and the allocation amount may be adjusted based on the above. Further, the allocation unit 124 may determine the allocation with reference to the installed capacity ratio, the weather forecast, the actual demand, and the like.

In addition, each consumer facility 20 is required to, for example, reverse power flow the planned value of the reverse power flow electric energy of each time individually allocated to the distribution system at each time. On the other hand, in each consumer facility 30, when the planned value of the reverse power flow power amount for each time individually allocated exceeds, for example, the power amount related to the production planned in the consumer facility 30, the excess is exceeded. It is required to reverse the amount of electric power to the distribution system. The allocation unit 124, for example, is based on the planned value of the reverse power flow electric energy for each hour determined by the reverse power flow electric energy determination unit 123 (the total value of each customer facility 20 and each consumer facility 30). The planned value of reverse power flow electric energy for each hour allocated to 20 and each customer facility 30 is determined. This hourly reverse power flow electric energy plan value is used as information included in the power equipment control command 401 from the power control unit 121 via the communication unit 11 to each customer facility 20 to which the reverse power flow current is assigned and each demand. It is transmitted to the house facility 30. Further, the reverse power flow electric energy planned value for each hour is stored in the storage unit 13 as the reverse power flow planning information 131.

At the time of allocation, the allocation unit 124 allocates the planned value of the reverse power flow amount to each customer facility 20 and each customer facility 30 so as to satisfy a predetermined condition relating to the reverse power flow of the distribution system. Can be adjusted. For example, the allocation unit 124 allocates the planned value of the reverse power supply amount to each customer facility 20 and each customer facility 30 connected to the range of the distribution system having a relatively large allowable value of reverse power flow power. It is possible to adjust so that the allowable value of reverse power flow is larger than the allocation of the planned value of the amount of reverse power power to each customer facility 20 and each customer facility 30 connected to the range of the distribution system where the allowable value is relatively small. can.

Next, an operation example of the power management system 1 described with reference to FIGS. 1 to 3 will be described with reference to FIGS. 4 and 5. FIG. 4 shows, in the power management system 1 shown in FIGS. 1 and 2, each power generation facility 25 of the plurality of consumer facilities 20 in which the power management device 10 manages the electric power consumed in the production of each consumer facility 30. An operation example is shown in the case where the generated electric power and the electric power generated by each power generation facility 35 of one or a plurality of consumer facilities 30 are used. However, in the operation example shown in FIG. 4, one or more consumer facilities 30 are factories that produce the same goods, and the production amount and the electric power amount related to the production are proportional to each other. Further, FIG. 5 is a schematic diagram used when explaining the operation example shown in FIG. 4, and is an hourly reverse power flow electric energy predicted value from 8:00 to 18:00 on a certain day (FIG. 5 (a)). ), The production planned value (FIG. 5 (b)), and the reverse power flow electric energy planned value (FIG. 5 (c)) are shown. In FIG. 5, the horizontal axis is time and the vertical axis is a linear arbitrary unit. The production plan value shown in FIG. 5B is the production amount. It is assumed that each value from 0:00 to 8:00 and from 18:00 to 24:00 is zero.

The process shown in FIG. 4 is repeatedly executed, for example, at predetermined time intervals. In the process shown in FIG. 4, first, in the power management device 10, the reverse power flow electric energy determination unit 123 performs one day (for example, the next day) based on, for example, reverse power flow plan information 131, past results, weather forecast, and the like. The amount of reverse power flow per hour for each customer facility 20 and each customer facility 30 is predicted (step S1). In step S1, for example, as shown in FIG. 5A, the amount of reverse power flow (total value of each customer facility 20 and each customer facility 30) in each time zone (each time zone every hour in this example). ) Is expected.

Next, the reverse power flow power amount determination unit 123 determines each customer facility 30 in one day from the daily total of the predicted values of the reverse power flow power amount per hour of each customer facility 20 and each customer facility 30. The total production amount that can be produced is determined (step S2). Next, the reverse power flow electric energy determination unit 123 determines the production amount at each consumer facility 30 (factory) per hour from the determined total production amount, and makes a production plan (step S3). In step S3, for example, as shown in FIG. 5B, the production amount in each time zone is determined. In the example shown in FIG. 5B, production is carried out from 9:00 to 12:00 and from 13:00 to 17:00. In this case, the predicted values of reverse power flow from 8:00 to 9:00 and from 12:00 to 13:00 shown in FIG. 5 (a) are shaded from 9:00 to 10:00 in FIG. 5 (b). It is allocated to the production volume from 14:00 to 17:00.

Next, the reverse power flow electric energy determination unit 123 determines the reverse power flow electric energy planned value per hour from the production plan formulated in step S3 (step S4). In step S4, for example, as shown in FIG. 5C, the reverse power flow power amount planned value for each time zone is determined. In the example shown in FIG. 5 (c), the planned reverse power flow power amount for the time from 9:00 to 12:00 and from 13:00 to 17:00 is determined so as to correspond to the production amount shown in FIG. 5 (b). ing. In this case, the predicted values of reverse power flow from 8:00 to 9:00 and from 12:00 to 13:00 shown in FIG. 5 (a) are shaded from 9:00 to 10:00 in FIG. 5 (c). It is assigned to the reverse power flow planned value from 14:00 to 17:00.

Next, the allocation unit 124 allocates the reverse power flow electric energy planned value determined by the reverse power flow electric energy determination unit 123 in step S4 to each customer facility 20 and each consumer facility 30 every hour (step S5). The reverse power flow electric energy planned value assigned to each customer facility 20 and each customer facility 30 by the allocation unit 124 for each hour is the information included in the power equipment control command 401 from the power control unit 121 to the communication unit 11. It is transmitted to each customer facility 20 and each customer facility 30 via.

Next, each customer facility 20 and each customer facility 30 have each power generation facility 25 and each power generation facility 25 such as, for example, the amount of power generated by solar power generation, according to the allocated reverse current power amount planned value for each hour. The charge / discharge from each storage battery 21 and each storage battery 31 is controlled based on the amount of power generated by the power generation facility 35 and the predetermined amount of power required by each customer facility 20 and each customer facility 30 (step S6).

As described above, in the present embodiment, the planned value of the reverse power flow amount from each customer facility is managed according to the production plan of the factory, and the power is transmitted from each external customer facility to the factory via the distribution system. Therefore, it is possible to easily manage the power supply from the outside to the factory and the reverse power flow to the distribution system.

In addition, a plurality of consumer facilities 20 and 1 provided with at least one of a power generation facility using renewable energy and a storage battery so that the amount of electric energy required for production at the consumer facility 30 such as a factory can be sufficiently satisfied. Alternatively, by appropriately combining a plurality of consumer facilities 30, production with renewable energy can be guaranteed. For example, it is possible to supply a recycled material having 100% renewable energy, and it is possible to promote the utilization of green power.

For example, in each consumer facility 20, private use may be prioritized at the request of the consumer, and only the surplus may be subject to reverse power flow. That is, for example, the power generated from the power generation facility 25 is preferentially used as the charging power according to the charging rate of each storage battery 21, or the discharging power of each storage battery 21 is used to reduce the power purchased from the grid. You may.

The amount of electric power consumed by the production facility 361 in the consumer facility 30 can be calculated according to, for example, the production amount, the operating time, and the like. However, the present invention is not limited to these, and for example, when the production of an article includes a welding process, the electric energy related to the production can be calculated by the electric energy consumption such as the spot welding electric energy of the unit. For example, in the case of 12 points, it is calculated as an average value of welding, for example, in the case of a welding voltage of 24 V, it is calculated as 24 × 22000 A × 12 points × number of seconds / 3600 (Wh), or described in JP-A-2008-142773. It may be calculated from the method described above.

In factories with large-scale production equipment, large storage batteries are used to absorb changes in the total amount of fluctuations, so that the storage batteries can absorb changes in the amount of reverse power flow due to changes in solar power generation and demand. Therefore, stable production by renewable energy can be performed.

As described above, the electric power management system 1 of the present embodiment manages the supply and demand of electric power by the plurality of consumer facilities 20 and each consumer facility 30 connected to the predetermined distribution systems 70-1, 70-2 and the like. It is a system. In the electric power management system 1, the plurality of consumer facilities 20 and 30 utilize electric power with the plurality of consumer facilities 20 (first consumer facility) having at least one of the storage battery 21 (storage facility) and the power generation facility 25. This includes one or more consumer facilities 30 (second consumer facilities), which are facilities for producing goods. Further, the power management system 1 includes a reverse power flow electric energy determination unit 123 and an allocation unit 124. The reverse power flow electric energy determination unit 123 receives power distribution systems 70-1, 70-2, etc. from a plurality of consumer facilities 20 and 30 according to the demand forecast of electric power related to hourly production based on the production plan. Determine the planned value of the amount of reverse power flow power to be reverse power flow every hour. Further, the allocation unit 124 individually allocates the planned value of the reverse power flow electric energy determined by the reverse power flow electric energy determination unit 123 to the plurality of consumer facilities 20 and the consumer facilities 30.

In the present embodiment, each customer facility 20 and demand are managed by managing the planned value of the reverse power flow amount from each customer facility 20 and the customer facility 30 according to the production plan of the customer facility 30 such as a factory. Power is supplied from the house facility 30 to the consumer facility 30 such as a factory via the distribution systems 70-1, 70-2 and the like. Therefore, it is possible to easily manage the power supply from the outside to the factory and the reverse power flow to the distribution system.

In the present embodiment, the production plan is determined based on the predicted value of the amount of power that is reversely flowed from the plurality of consumer facilities 20 and the consumer facilities 30 to the distribution systems 70-1, 70-2, and the like. .. According to this configuration, it is possible to more accurately manage the correspondence between the production plan and the reverse power flow amount. It is possible to easily manage the amount to be less than or equal to the amount.

Further, the charge / discharge control unit 222 and the charge / discharge control unit 222 and the consumer facility 30 having the storage battery 21 and the storage battery 31 control the charge / discharge electric energy of the storage battery 21 and the storage battery 31 based on the result of the allocation by the allocation unit 124. It includes a control unit 323. According to this configuration, the charge / discharge power can be controlled in the consumer facility 20 and the consumer facility 30, so that the charge / discharge power is responsively controlled according to changes in the amount of power generated by the power generation facility and the power consumption of the power load facility. be able to.

Further, the allocation unit 124 has a planned value of the amount of reverse power flow to each customer facility 20 and each customer facility 30 so as to satisfy a predetermined condition related to reverse power flow of the distribution systems 70-1 and 70-2. You can adjust the allocation of. As described above, when the planned value of the reverse power flow amount is adjusted according to the predetermined condition related to the reverse power flow, the predetermined condition related to the reverse power flow can be easily satisfied.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the design and the like within a range not deviating from the gist of the present invention are also included. For example, the process of calculating each predicted value or each planned value may be executed by any of the power management device 10, the control device 32, and the control device 22, and the processes are distributed and executed while transmitting and receiving information. May be good.

1: Power management system, 10: Power management device, 20, 30: Consumer facility, 21, 31: Storage battery, 12, 22, 32: Control device, 121: Power control unit, 122: Receiver unit, 123: Reverse power flow Electric energy determination unit, 124: Allocation unit, 361: Production equipment

Claims (5)

A system that manages the supply and demand of electric power by multiple consumer facilities connected to a predetermined distribution system.
The plurality of consumer facilities include a plurality of first consumer facilities having at least one of a power storage facility or a power generation facility, and one or a plurality of second consumer facilities which are facilities for producing goods by using electric power. Including
Inversely, the planned value of the amount of reverse power flow power to be reverse power flowed from the plurality of consumer facilities to the distribution system is determined for each time according to the demand forecast of the electric power related to the production for each hour based on the production plan. Power flow power determination unit and
An allocation unit that individually allocates the planned value of the reverse power flow power amount determined by the reverse power flow power amount determination unit to the plurality of consumer facilities, and
Power management system with. The power management system according to claim 1, wherein the production plan is determined based on a predicted value of the amount of power that is reversely flowed from the plurality of consumer facilities to the distribution system. The power management system according to claim 1 or 2, wherein the consumer facility having the power storage facility includes a charge / discharge control unit that controls the charge / discharge power amount of the power storage facility based on the result of the allocation by the allocation unit. Any one of claims 1 to 3 that adjusts the allocation of the planned value of the reverse power flow amount to each customer facility so that the allocation unit satisfies a predetermined condition relating to the reverse power flow of the distribution system. The power management system described in the section. It is a method of managing the supply and demand of electric power by multiple consumer facilities connected to a predetermined distribution system.
The plurality of consumer facilities include a plurality of first consumer facilities having at least one of a power storage facility or a power generation facility, and one or a plurality of second consumer facilities which are facilities for producing goods by using electric power. Including
The planned value of the reverse power flow amount to be reverse power flowed from the plurality of consumer facilities to the distribution system according to the hourly power demand forecast for the production based on the production plan by the reverse power flow power amount determination unit. Is determined for each time mentioned above,
A power management method in which a planned value of the reverse power flow power amount determined by the reverse power flow power amount determination unit is individually assigned to the plurality of consumer facilities by the allocation unit.

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