JP2013247792A - Power management device, power management system, and power management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently utilize the power supplies which are installed in a plurality of facilities.SOLUTION: A power management device includes a communication unit and a determination unit. The communication unit transmits first prediction data indicating an estimated value of the demand-and-supply balance of power with regard to a first facility which has a power supply and is interconnected to a utility grid to a communication network and, when a message requesting the accommodation of power is received from other power management device transmitting second prediction data indicating an estimated value of the demand-and-supply balance of power in a second facility interconnected to the utility grid, receives the second prediction data from the communication network. The determination unit determines on the basis of the first prediction data and the second prediction data whether power can be accommodated. When it is determined that power can be accommodated, the communication unit transmits a message for approval of the request to the other power management device.

Description

  The present invention relates to a technique for managing power of a plurality of facilities.

  In recent years, research and development of smart grids and microgrids incorporating information and communication technologies has been active. The mainstream is demonstrative technology development aimed at low carbonization and economical power operation. In addition, more efficient energy management methods are being studied on the side of consumers such as factories, buildings, and houses by utilizing natural energy such as solar power generation and distributed power sources such as storage batteries. Such an energy management method, for example, controls the distributed power source via communication based on the situation of the customer, and performs load leveling and power interchange.

  For example, when a plurality of microgrids are connected by a network and power is supplied in response to a request from a customer, the power status is compared between one's own microgrid and another microgrid, and the other depending on the result. Technology for controlling power transactions with microgrids is known. In addition, for example, by measuring the voltage at the grid connection point of a consumer with a distributed power source, determining the consumer that is or is likely to deviate from the voltage regulation value, and comparing it with consumer information A technique is known in which priority is determined and output adjustment is performed for a consumer with low priority (for example, Patent Documents 1 and 2).

JP 2011-229268 A JP 2006-149061 A

  In a technology in which a consumer requests power using user authentication, power cannot be interchanged autonomously according to an increase or decrease in demand such as load fluctuation. Further, in the technology in which the system management device controls the distributed power source of the customer, it is necessary to centrally manage the customer information.

  In order to solve the above problem, a power management apparatus according to one embodiment of the present invention includes a communication unit and a determination unit. A communication part transmits the 1st prediction data which shows the predicted value of the power supply-demand balance about the 1st installation which has a power supply and connects to an electric power grid, and the electric power of the 2nd installation linked to an electric power grid When receiving a power interchange request message from another power management apparatus that transmits second predicted data indicating the predicted value of the supply and demand balance to the communication network, the second predicted data is received from the communication network. The determination unit determines whether or not power accommodation is possible based on the first prediction data and the second prediction data. When it is determined that power interchange is possible, the communication unit transmits a request permission message to another power management apparatus.

  A power source provided in a plurality of facilities can be used efficiently.

FIG. 1 shows a configuration of a distributed energy management system. FIG. 2 shows management data of xEMS (1) in the shared data area. FIG. 3 shows management data of xEMS (2) in the shared data area. FIG. 4 shows the management data output process. FIG. 5 shows the configuration of the factory managed by the distributed energy management system. FIG. 6 shows the relationship between predicted power and target power. FIG. 7 shows cooperation request processing. FIG. 8 shows a specific example of the operation of the distributed energy management system.

  Hereinafter, a distributed energy management system which is an application example of the power management system of the present invention will be described.

  FIG. 1 shows a configuration of a distributed energy management system. The distributed energy management system includes a data field 10, a plurality of energy management systems 11, a gateway 17, and an energy management system 16. Each of the plurality of energy management systems 11 and energy management systems 16 is a subsystem of an autonomous distributed network. The plurality of energy management systems 11 are directly connected to the data field 10. The energy management system 16 is connected to the data field 10 via the gateway 17.

  In the drawings and the following description, the plurality of energy management systems 11 may be referred to as xEMS (x energy management system). For example, when the target equipment which is the equipment to be managed by xEMS is a factory, a building, or a home, xEMS is called a factory energy management system, a building energy management system, or a home energy management system, respectively, depending on the target equipment. The target facility includes a load that consumes power and a power source that supplies the power. This power source is also called a distributed power source because it is distributed to subsystems.

  The data field 10 is a communication network for an autonomous distributed network, and distributes management data output from each xEMS. Each xEMS may transmit management data to the data field 10 by broadcasting. In this case, each xEMS may receive necessary management data. Further, the server in the data field 10 may store the management data transmitted from each xEMS. In this case, the server in the data field 10 may transmit the management data requested from each xEMS to the request source.

  By assigning subsystem numbers to the plurality of energy management systems 11, they will be referred to as xEMS (1) to xEMS (5), respectively. Further, by assigning a subsystem number to the energy management system 16, it is called xEMS (6). There is no limit to the number of subsystems.

  The energy management system 11 includes a communication unit 31, a determination unit 32, and a management unit 34. The communication unit 31 transmits its management data to the data field 10 and receives other xEMS management data from the data field 10. The determination unit 32 performs determination for power management based on the management data. A target period, which is a management period, is set in advance for each xEMS. The target period is, for example, one day of the factory operating day. In addition, the determination unit 32 predicts the power consumption and supply power of the target facility in the target period. The power consumption of the target facility is consumption due to a load in the target facility, charging of a storage battery, or the like. The supply power of the target facility is power generation by a generator in the target facility, discharge of a storage battery, or the like. The management unit 34 manages the power of the target facility. For example, the management unit 34 controls power consumption and supply power in the facility by controlling a power converter, a load, a circuit breaker, and the like in the facility.

  The energy management system 16 includes a management unit 34 similar to the energy management system 11. The gateway 17 includes a communication unit 31 and a determination unit 32 that are the same as those of the energy management system 11. Even a subsystem such as the energy management system 16 that does not have the communication unit 31 and the determination unit 32 can be connected to the data field 10 via the gateway 17.

  Each xEMS is, for example, a computer having a microprocessor and a memory. In this case, the program stored in the memory causes the microprocessor to function as xEMS.

  FIG. 2 shows management data of xEMS (1) in the shared data area. This state is a state in which xEMS (1) is not in a cooperative relationship with other xEMS.

  The data field 10 provides a shared data area D1. The shared data area D1 includes management data areas D11, D12, D13, D14, D15, and D16 corresponding to xEMS (1) to xEMS (6), respectively. By storing the management data of xEMS corresponding to the management data area, the data field 10 centrally manages the management data. Each xEMS transmits management data to its own management data area, and when the management data of another xEMS is required, selects the corresponding management data area and receives the management data in the selected management data area. .

  Here, the management data 110 of xEMS (1) stored in the management data area D11 will be described. The management data 110 includes predicted power information 111, target power information 112, and determination information 113. All management data has the same format.

  The predicted power information 111 indicates the predicted power of xEMS (1). The target power information 112 indicates the target power of xEMS (1).

  A target power is preset for each xEMS. The target power indicates the upper limit of power purchased from the commercial grid. The determination unit 32 calculates predicted power, which is a predicted value of purchased power in the target period, based on the power consumption and supply power of the target facility in the target period. The purchased power is power obtained by subtracting the power supplied from the target facility from the power consumed by the target facility. The purchased power is required to be lower than the target power. The predicted power and the target power may be represented by electric power or may be represented by electric energy. The predicted power indicates a predicted value for each predetermined time interval in the target period. The time interval is, for example, 1 hour.

  The determination information 113 indicates a determination result of whether or not all the predicted power within the target period is equal to or less than the target power. When all the predicted power within the target period is equal to or less than the target power, the determination information 113 indicates “OK”. When any predicted power within the target period exceeds the target power, the determination information 113 indicates “NG”.

  As described above, the management data 110 of xEMS (1) circulates in the data field 10, so that xEMS (2) to (6) can acquire the management data 110 of xEMS (1).

  FIG. 3 shows management data of xEMS (2) in the shared data area. This state is a state in which xEMS (2) has a cooperative relationship with xEMS (1). In this cooperative relationship, xEMS (2) accommodates power to xEMS (1) in response to a request from xEMS (1). That is, power is supplied from the power source of the target facility of xEMS (2) to the load of the target facility of xEMS (1). The management data 120 of xEMS (2) has the same format as the management data 110, and includes predicted power information 121, target power information 122, and determination information 123. The predicted power information 121 indicates the predicted power of xEMS (1) in addition to the predicted power of xEMS (2). The target power information 122 indicates the target power of xEMS (1) in addition to the target power of xEMS (2).

  The determination unit 32 of the xEMS (2) acquires the management data 110 of the xEMS (1) from the management data area D11 of the data field 10 when the cooperative relationship is formed in response to the request from the xEMS (1), and the management data 110 The management data 120 of xEMS (2) is generated based on the above. Next, the communication unit 31 of xEMS (2) transmits the generated management data 120 to the management data area D12 of the data field 10.

  Hereinafter, a management data output process, which is a process in which each xEMS outputs management data to the data field 10, will be described. Here, it is assumed that the target equipment is a factory. Here, management data output processing by xEMS (1) is shown. The other xEMS performs the same operation.

  FIG. 4 shows the management data output process. Each xEMS performs management data output processing at a predetermined time every day. For example, each xEMS performs management data output processing every day at 8:00 am before factory operation.

  First, in S1, xEMS (1) acquires prior information and generates target power information 112 based on the acquired prior information. Prior information includes, for example, target power, weather information, production plan information, and performance information. The production plan information indicates, for example, the production plan of the target factory. The track record information indicates track records such as power consumption and supply power in the target factory. The prior information may be stored in a storage device inside the xEMS, or may be received from a server outside the xEMS via a communication network.

  Next, in S2, xEMS (1) predicts the power consumption and supply power in a target factory based on prior information, and formulates the operation plan of the target factory in a target period. The operation plan shows the operation of the load and power supply in the target factory.

  Next, in S3, xEMS (1) calculates predicted power based on the operation plan, and generates predicted power information 111 based on the calculated predicted power.

  Next, in S4, xEMS (1) determines whether prediction electric power is below target electric power.

  When it is determined that the predicted power is equal to or lower than the target power (S4, YES), xEMS (1) writes “OK” in the determination information 113 in S5, and shifts the processing to S7. Note that xEMS (1) may write “OK” in the determination information 113 when the value obtained by adding a predetermined margin to the predicted power is equal to or less than the target power.

  When it is determined that the predicted power is not less than or equal to the target power (S4, NO), xEMS (1) writes “NG” in the determination information 113 in S6, and shifts the processing to S7.

  In S7, the xEMS generates management data 110 including the predicted power information 111, the target power information 112, and the determination information 113, and outputs the generated management data to its own management data area D11 in the data field 10.

  The above is the management data output process.

  Hereinafter, a specific example of the configuration of the distributed energy management system when the target facility is a factory will be described.

  FIG. 5 shows the configuration of the factory managed by the distributed energy management system. In this example, the demand facility is a factory 21 and xEMS is a factory energy management system (FEMS) 11. The commercial system 60 supplies electric power to the factory system 62 via the transformer 61. The in-factory system 62 supplies power to the plurality of factories 21. That is, the plurality of factories 21 are linked to the in-factory system 62. The factory system 62 may supply power to the low voltage system 64 via the transformer 63.

  The factory 21 includes an FEMS 11, a load 41, a PCS (power conditioning system) 42, a distributed power source, a wattmeter 51, a circuit breaker 52, and a transformer 53. The distributed power source is, for example, a PV (photovoltaic power generation) 42, a storage battery 43, or the like. In the drawings and the following description, one of the two factories 21 is called a factory (1) and the other is called a factory (2). The FEMS 11 that manages the factory (1) is called FEMS (1), and the FEMS 11 that manages the factory (2) is called FEMS (2).

  The wattmeter 51 measures the amount of power purchased from the commercial system 60 to the factory 21 and the amount of power sold from the factory 21 to the commercial system 60 and transmits them to the FEMS 11. The circuit breaker 52 blocks a part of the wiring on the premises in response to an instruction from the FEMS 11. The load 41 consumes power from the factory system 62 and the PCS 42. The transformer 53 converts the voltage between the factory system 62 and the PCS 42. The PCS 42 converts DC power output from the distributed power source into AC power. Further, the PCS 42 may switch charging / discharging of the storage battery 43. The FEMS 11 controls the PCS 42 based on the operation plan.

  The FEMS 11 is connected to the data field 10. FEMS (1) writes the management data 110 to the management data area D11 in the shared data area D1. The FEMS (2) writes the management data 120 in the management data area D12 in the shared data area D1. Further, the FEMS (1) can read the management data 120 from the management data area D12 of the FEMS (2). Similarly, the FEMS (2) can read the management data 110 from the management data area D11 of the FEMS (1).

  Hereinafter, specific examples of predicted power and target power in FEMS (1) and FEMS (2) will be described.

  FIG. 6 shows the relationship between predicted power and target power. This figure shows a comparison result 213 between the predicted power 211 and the target power 212 in FEMS (1), and a comparison result 223 between the predicted power 221 and the target power 222 in FEMS 120. Furthermore, this figure compares the total predicted power 231 that is the sum of the predicted powers of FEMS (1) and FEMS (2) with the total target power 232 that is the sum of the target powers of FEMS (1) and FEMS (2). Result 233 is shown. That is, when FEMS (1) and FEMS (2) form a cooperative relationship, the total predicted power 231 is the sum of the predicted power 211 and the predicted power 221, and the total target power 232 is the target power 212 and the target power. The total of 222. Moreover, the predicted power 211, the predicted power 221, and the total predicted power 231 indicate temporal changes for each time interval within the target period.

  According to the comparison result 213 of FEMS (1), there is a time zone in which the predicted power 211 exceeds the target power 212. According to the comparison result 223 of FEMS (2), there is a margin until the predicted power 221 reaches the target power 222.

  Further, according to the total comparison result 233, the total predicted power 231 does not exceed the total target power 232. Therefore, FEMS (1) and FEMS (2) form a cooperative relationship, and supply a part of the power supply in factory (2) to factory (1), thereby reducing the shortage of power supply in factory (1). Can be resolved.

  Hereinafter, a cooperation request process for requesting cooperation (power interchange) from another xEMS when a certain xEMS predicts a shortage of target power will be described.

  FIG. 7 shows cooperation request processing. Here, it is assumed that the distributed energy management system has N xEMSs. Each xEMS is represented by xEMS (i) using a subsystem number i which is an integer from 1 to N. xEMS (i) performs a cooperation request process, when its determination information is "NG" as a result of the management data output process.

  First, in S11, xEMS (i) substitutes the value of i into a variable j.

  In step S12, xEMS (i) determines whether j = N.

  If j = N is not satisfied (S12, NO), that is, if there is an xEMS having a subsystem number greater than i, in S13, xEMS (i) calculates a value obtained by adding 1 to i and calculates a new i. The assigned value is substituted, and the process proceeds to S15.

  If j = N (S12, YES), that is, if there is no xEMS having a subsystem number larger than i, in S14, xEMS (i) substitutes 1 for i and shifts the process to S15.

  In S15, xEMS (i) determines whether xEMS (j) has already cooperated with other xEMS. Here, xEMS (i) acquires management data of xEMS (j) from the data field 10, and when the management data of xEMS (j) includes other xEMS data, xEMS (j) It is determined that it has already cooperated with xEMS.

  When it is determined that xEMS (j) has already cooperated with another xEMS (S15, YES), xEMS (i) shifts the process to S12.

  When it is determined that xEMS (j) has not cooperated with another xEMS (S15, NO), in S16, xEMS (i) determines whether or not the determination information of xEMS (j) is “OK”. .

  When the determination information of xEMS (j) is “NG” (S16: NO), that is, when there is no margin in the target power of xEMS (j), xEMS (i) shifts the process to S12.

  When the determination information of xEMS (j) is “OK” (S16: YES), that is, when the target power of xEMS (j) has a margin, xEMS (i) cooperates with xEMS (j) in S17. Send the request message and end this flow.

  The above is the cooperation request processing.

  After xEMS (i) sends a cooperation request message to xEMS (j), when xEMS (j) sends a cooperation permission message to xEMS (i), the cooperative relationship between xEMS (i) and xEMS (j) To establish. On the other hand, when xEMS (j) transmits a message of cooperation refusal to xEMS (i), the cooperative relationship between xEMS (i) and xEMS (j) is not established.

  According to this cooperation request process, when the target power of the xEMS is insufficient, the xEMS can request the exchange of power to another xEMS.

  Hereinafter, a specific example of the operation of the distributed energy management system including cooperation request processing will be described.

  FIG. 8 shows a specific example of the operation of the distributed energy management system. This sequence diagram shows the operation of xEMS (1), xEMS (2), xEMS (3), and data field 10.

  First, in S101, xEMS (1) determines whether or not the target power is sufficient. Similarly, in S102, xEMS (2) determines whether or not the target power is sufficient. Similarly, in S103, xEMS (3) determines whether the target power is sufficient. Here, the target power of xEMS (1) is insufficient, the target power of xEMS (2) is sufficient, and the target power of xEMS (3) is sufficient. That is, here, the determination information of xEMS (1) is “NG”, the determination information of xEMS (2) is “OK”, and the determination information of xEMS (3) is “OK”.

  Next, in S111, the xEMS (1) transmits a cooperation request message to the xEMS (2) having its next subsystem number by the cooperation request process.

  In step S112, the xEMS (2) requests the management data of the request source xEMS (1) from the data field 10. Next, in S113, the xEMS (2) receives the management data of xEMS (1), adds the management data of xEMS (1) to its own management data, thereby generating its own management data and data field 10 Send to.

  Next, in S114, xEMS (2) determines whether the total predicted power of xEMS (1) and xEMS (2) is within an appropriate range based on the management data of xEMS (1) and xEMS (2). To do. Here, for example, when the total predicted power of xEMS (1) and xEMS (2) is less than or equal to the total target power of xEMS (1) and xEMS (2), xEMS (2) is within the appropriate range. It is determined that For example, xEMS (2) may determine that the total predicted power is within the appropriate range when a value obtained by adding a predetermined margin to the total predicted power is equal to or less than the total target power.

  When it is determined that the total predicted power is within the appropriate range (S114: YES), in S115, xEMS (2) transmits a cooperation permission message to xEMS (1). Next, in S116, xEMS (1) cooperates with xEMS (2), and ends this sequence.

  When it is determined that the total predicted power is not within the appropriate range (S114: NO), in S117, xEMS (2) clears the management data of xEMS (1) in its management data. In step S118, the xEMS (2) transmits a cooperation rejection message.

  Next, in S121, when the xEMS (1) receives the cooperation rejection message, the cooperation request process transmits a cooperation request message to xEMS (3) having the next subsystem number of xEMS (2). Processing similar to S118 is performed.

  In step S122, the xEMS (2) requests the management data of the request source xEMS (1) from the data field 10. Next, in S123, the xEMS (2) receives the management data of xEMS (1), adds the management data of xEMS (1) to its own management data, thereby generating its own management data and data field 10 Send to.

  Next, in S124, xEMS (2) determines whether the total predicted power of xEMS (1) and xEMS (2) is within an appropriate range based on the management data of xEMS (1) and xEMS (2). To do. Here, for example, when the total predicted power of xEMS (1) and xEMS (2) is less than or equal to the total target power of xEMS (1) and xEMS (2), xEMS (2) is within the appropriate range. It is determined that

  When it is determined that the total predicted power is within the appropriate range (S124: YES), in S125, xEMS (2) transmits a cooperation permission message to xEMS (1). Next, in S126, xEMS (1) cooperates with xEMS (2), and ends this sequence.

  When it is determined that the total predicted power is not within the appropriate range (S124: NO), in S127, xEMS (2) clears the management data of xEMS (1) in its own management data. Next, in S128, xEMS (2) transmits a cooperation rejection message.

  If there is xEMS having the subsystem number next to xEMS (2), the same processing as S111-S118 is performed.

  The above is a specific example of the operation of the distributed energy management system.

  According to this operation, the xEMS of the request destination uses the sum of the predicted power of the request source and its own predicted power and the total of the target power of the request source and its own target power. Can be managed.

  Note that xEMS may correct the predicted power every hour. As a result of the correction, when the predicted power exceeds the target power, a cooperation request process is performed, and this process is repeatedly performed until the operation plan for one day is completed.

  When the determination information of the requested subsystem is “NG”, when the requested subsystem is already in a cooperative relationship with another subsystem, or the total requested power is determined to be insufficient due to the requested cooperation. If this happens, the cooperative relationship with the client will not be concluded. In this case, the requesting subsystem makes a cooperation request to the subsystem having the next subsystem number again.

  In the cooperation request process, the requesting subsystem may determine whether or not the total predicted power is equal to or less than the total target power. In this case, the requesting subsystem acquires management data of the requesting subsystem from the data field 10.

  The sub-system receiving the cooperation request may correct its own operation plan or may partially cut off the load. Further, in the request-destination subsystem that has formed a cooperative relationship, the management unit 34 may accommodate power to the target facility of the request source by controlling the power converter and the circuit breaker.

  In addition, the xEMS may request cooperation from other plural xEMSs. For example, when xEMS (1) makes a cooperation request to xEMS (2) and xEMS (3), the total predicted power of xEMS (1), xEMS (2), and xEMS (3) is xEMS (1) and xEMS (3). When the total target power is equal to or less than 2) and xEMS (3), these cooperative relationships are established.

  According to the above embodiment, the distributed energy management system can supplement energy between the subsystems. In other words, even if one subsystem becomes difficult to manage energy alone due to a sudden increase in load due to the cooperation between the subsystems, one subsystem works together with another surplus subsystem. By considering it as a subsystem, total energy management becomes possible. Thereby, distributed power sources, such as solar power generation and a storage battery, can be used efficiently. Moreover, the load can be reduced by controlling the load such as air conditioning and lighting by the subsystem. In addition, the distributed energy management system provides power interchange between subsystems to efficiently use power discharged from storage batteries and power generated by renewable energy, and use power from commercial systems. The amount can be reduced.

  Further, according to the above embodiment, in a large-scale facility such as a factory or a local community, each subsystem that is a consumer performs energy management alone, and other subsystems when the load increases. By cooperating with, power interchange between subsystems can be implemented autonomously. Further, in realizing such power interchange, each subsystem can be interchanged with other subsystems depending on the situation, and the energy management function can be implemented as an autonomous distributed type rather than a centralized management type. Thereby, each subsystem does not need to manage the management data of all the facilities.

  Moreover, FEMS may perform the energy cooperation in the whole area linked with the building energy management system, the household energy management system, etc. besides the energy cooperation between factories by FEMS. In this way, by connecting each subsystem with an autonomous decentralized network, energy can be interchanged between factories, buildings, public facilities, etc. that are located in remote locations, and energy management for the entire local community is possible. It becomes possible. The conventional energy management system performs energy management only within the system, but according to the embodiment described above, it is possible to efficiently use electric power in a large-scale factory and the surrounding area.

  The techniques described in the above embodiments can be expressed as follows.

(Expression 1)
For the first equipment having a power supply and connecting to the power system, first prediction data indicating a predicted value of the power supply and demand balance is transmitted to the communication network, and the power supply and demand balance of the second equipment connected to the power system is transmitted. A communication unit that receives the second prediction data from the communication network when receiving a message for requesting power accommodation from another power management device that transmits the second prediction data indicating the predicted value to the communication network;
A determination unit that determines whether or not the power accommodation is possible based on the first prediction data and the second prediction data;
When it is determined that the power accommodation is possible, the communication unit transmits a message for permitting the request to the other power management device.
Power management device.

(Expression 2)
A first power management device that transmits first prediction data indicating a predicted value of a balance between power supply and demand to a communication network for a first facility that has a power supply and is linked to a power system;
A second power management device that transmits second prediction data indicating a predicted value of the power supply-demand balance of the second facility linked to the power system to the communication network;
The first power management apparatus receives the second prediction data from the communication network when receiving a message for requesting power interchange from the second power management apparatus, and receives the first prediction data and the second prediction Based on the data, it is determined whether or not the power accommodation is possible, and when it is determined that the power accommodation is possible, the first power management device sends the request to the second power management device. Send permission messages,
Power management system.

(Expression 3)
The first power management apparatus transmits, to the communication network, first prediction data indicating a predicted value of the power supply-demand balance for the first equipment having a power source and connected to the power system,
Request for power interchange from the second power management device, wherein the first power management device transmits second prediction data indicating a predicted value of the power supply-demand balance of the second facility linked to the power system to the communication network. If the second prediction data is received from the communication network,
The first power management device determines whether the power accommodation is possible based on the first prediction data and the second prediction data,
When it is determined that the power accommodation is possible, the first power management device transmits a message for permitting the request to the second power management device.
Power management method.

  Terms in these expressions will be described. The power management apparatus corresponds to, for example, the energy management system 11, the energy management system 16, and the gateway 17. The power system corresponds to, for example, the commercial system 61 and the factory system 62.

  10: data field, 11, 16: energy management system, 17: gateway, 31: communication unit, 32: determination unit, 34: management unit, 110, 120: management data, D1: shared data area, D11, D12: management Data area

Claims (9)

For the first equipment having a power supply and connecting to the power system, first prediction data indicating a predicted value of the power supply and demand balance is transmitted to the communication network, and the power supply and demand balance of the second equipment connected to the power system is transmitted. A communication unit that receives the second prediction data from the communication network when receiving a message for requesting power accommodation from another power management device that transmits the second prediction data indicating the predicted value to the communication network;
A determination unit that determines whether or not the power accommodation is possible based on the first prediction data and the second prediction data;
When it is determined that the power accommodation is possible, the communication unit transmits a message for permitting the request to the other power management device.
Power management device. The communication network is a data field of an autonomous distributed system,
The power management apparatus according to claim 1. The determination unit calculates a sum of a prediction value indicated in the first prediction data and a prediction value indicated in the second prediction data, and is the power accommodation possible based on the sum? Determine whether or not
The power management apparatus according to claim 1 or 2. The other power management apparatus determines whether or not the request is necessary based on the second prediction data. When it is determined that the request is necessary, the other power management apparatus transmits the request to the other power management apparatus. Send request message,
The power management apparatus according to any one of claims 1 to 3. The determination unit calculates the first prediction data based on a predicted value of power consumption by the first facility and a predicted value of power supplied by the first facility,
The other power management device calculates the second prediction data based on a predicted value of power consumption by the second facility and a predicted value of power supplied by the second facility.
The power management apparatus according to any one of claims 1 to 4. The first prediction data indicates a predicted value of purchased power from the power system by the first facility, and a target value of purchased power from the power system by the first facility,
The second prediction data indicates a predicted value of purchased power from the power system by the second facility and a target value of purchased power from the power system by the second facility.
The power management apparatus according to any one of claims 1 to 5. The determination unit, based on the first prediction data and the second prediction data, predicts the purchased power from the power system by the first facility and purchases power from the power system by the second facility. Calculate the total predicted power that is the sum of the predicted power value, the target value of the purchased power from the power system by the first facility, and the target value of the purchased power from the power system by the second facility And calculating a total target power that is a sum of the two and determining that the power interchange is possible when the total predicted power is equal to or less than the total target power.
The power management apparatus according to claim 6. A first power management device that transmits first prediction data indicating a predicted value of a balance between power supply and demand to a communication network for a first facility that has a power supply and is linked to a power system;
A second power management device that transmits second prediction data indicating a predicted value of the power supply-demand balance of the second facility linked to the power system to the communication network;
The first power management apparatus receives the second prediction data from the communication network when receiving a message for requesting power interchange from the second power management apparatus, and receives the first prediction data and the second prediction Based on the data, it is determined whether or not the power accommodation is possible, and when it is determined that the power accommodation is possible, the first power management device sends the request to the second power management device. Send permission messages,
Power management system. The first power management apparatus transmits, to the communication network, first prediction data indicating a predicted value of the power supply-demand balance for the first equipment having a power source and connected to the power system,
Request for power interchange from the second power management device, wherein the first power management device transmits second prediction data indicating a predicted value of the power supply-demand balance of the second facility linked to the power system to the communication network. If the second prediction data is received from the communication network,
The first power management device determines whether the power accommodation is possible based on the first prediction data and the second prediction data,
When it is determined that the power accommodation is possible, the first power management device transmits a message for permitting the request to the second power management device.
Power management method.

Images