WO2014033893A1

WO2014033893A1 - Method for forming electric power interchange group and electric power interchange group forming device

Info

Publication number: WO2014033893A1
Application number: PCT/JP2012/072096
Authority: WO
Inventors: 弘起佐藤; 石田　隆張
Original assignee: 株式会社日立製作所
Priority date: 2012-08-31
Filing date: 2012-08-31
Publication date: 2014-03-06
Also published as: JPWO2014033893A1

Abstract

When electric power interchange is performed, the electric power interchange can be controlled by forming a group constituted by a plurality of electric power interchange devices under arbitrary conditions. Electric power interchange devices (102 - 109) having electric power conversion devices (129) and so forth, includes conversion information (126), facility information (127) and dealing information (128). The electric power interchange devices are connected to a server (101) through a communication network (150). The selection of a group based on a condition is performed by using a group database (118), a facility control database (119), and an electric power amount information database (120) and the group information is transmitted to the electric power interchange devices (102 - 109). The electric power interchange devices (102 - 109) controls the electric power conversion devices (129) and so forth owned by itself using the transmitted group information to perform the electric power interchange control.

Description

Power accommodation group creation method and power accommodation group creation device

The present invention relates to a power accommodation control terminal, a method for controlling a power accommodation control terminal, and a power system related network system configured by the power accommodation control terminal. Specifically, the present invention relates to a plurality of power accommodation based on arbitrary conditions. The present invention relates to a technology that enables control of power interchange by creating a control terminal group.

Currently, expectations for stable power supply are increasing. In addition, the spread of distributed power sources and storage batteries such as solar power and wind power generation is progressing. In addition, there is a growing possibility that so-called dispatch electricity separation will be carried out, in which separate companies carry out transmission and distribution, and electricity is generated and consumed in each region from the current large-scale power plant and the power supply by the transmission / distribution network. There are high signs of changes to the local production and consumption type power supply and demand system.

As a means for constructing such a local production and consumption type supply and demand system, a technique using a multi-terminal type asynchronous interconnection device (see Patent Document 1) has been proposed. In this prior art, a connecting device having an AC / DC / AC converter is divided into small power grids, multi-terminal asynchronous interconnection devices communicate with each other, and power is transferred between the divided power grids. .

JP 2011-061970

There are several purposes for power transfer. For example, it is possible to obtain an environment in which electric power that always satisfies a certain quality can be used. When a disaster occurs, it is good to always be able to use power that satisfies a certain quality, even if the main power generation mode is a distributed power source that is over-demanded and unstable and uneven.
In order to use electric power that satisfies the above-mentioned constant quality, it is necessary to always maintain a constant balance between supply and demand within one electric power supply and demand system.

However, Patent Document 1 discloses only transferring power according to a supply request or a demand request, and does not consider keeping a balance between supply and demand within one power supply and demand system. Accordingly, an object of the present invention is to provide a technique for keeping a balance between supply and demand in a supply and demand system capable of receiving and transmitting power.

・ To keep the supply and demand balance constant, it can be solved by balancing multiple different demands and supplies. Demand is different for each customer in the amount of power required and the time zone used. The supply is the same, and the amount of power that can be generated and the time period during which power can be generated differ for each supply source. In addition, the power storage capacity of consumers is different. Therefore, by grouping these suppliers and consumers, it is possible to balance demand and supply and keep the supply-demand balance constant.

More specifically, conditions are set according to the objectives such as stable supply and demand of power, smoothing of power equipment, cost effectiveness, etc., and a group of power interchange equipment that satisfies these multiple conditions is selected. Conduct power interchange (power transfer). That is, the power accommodation device has accommodation conditions, facility information, control information, and transaction information. The server obtains these through communication, accommodation conditions, facility information, power system accommodation conditions and facility information, Create a database of electricity transaction information and create groups based on it.

According to the present invention, when power accommodation is executed, a group consisting of a plurality of power accommodation devices can be created based on an arbitrary condition to control power accommodation.

It is a figure which shows the structural example of the power interchange network system in this embodiment. It is a figure which shows the example of the group database in this embodiment. It is a figure which shows the example of the equipment management database and equipment information in this embodiment. It is a figure which shows the example of the electric energy information database in this embodiment, and transaction information. It is a flowchart which shows the example of a process sequence of the control method of the server and power accommodation apparatus of this embodiment. It is a flowchart which shows the example of a process sequence of the control method of the server of this embodiment. It is a figure which shows the example of the physical power transmission possible amount between the power interchange apparatuses in this embodiment, and a physical power transmission possible path | route. It is a figure which shows the example of the power transmission possible amount between apparatuses in this embodiment. It is a figure which shows the example of the item required for the power interchange in this embodiment, and its value. It is a figure which shows the example of a group which can be calculated in this embodiment. It is a figure which shows the example of the result of having selected the group based on the conditions in this embodiment.

---System configuration---
Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram illustrating a configuration example of a power interchange network system 100 according to the present embodiment. The power accommodation network system 100 (hereinafter, system 100) shown in FIG. 1 can control power accommodation by creating a group of a plurality of power accommodation devices based on arbitrary conditions when executing power accommodation in the power accommodation network. Computer system.

In the system 100 of this embodiment illustrated in FIG. 1, a multi-terminal type asynchronous interconnection device (power accommodation device) 102 (hereinafter, device 102) is connected to a power source 135, a battery 133, and a load 134 through power lines. A power interchange network is configured through system power supply line 160 and other

power interchange apparatuses

103, 104, 105, 106, 107, 108, 109 (hereinafter referred to as other apparatuses 103) connected to the power source, battery, and load. ing. In the system 100 of this embodiment, the device 102 and the other devices 103 are connected to the server 101 via the communication network 150.

The hardware configuration of the device 102 (the same applies to the other devices 103) is as follows. The device 102 stores, in the internal memory 141, a storage device 121 composed of a suitable non-volatile storage device such as a hard disk drive, an internal memory 141 composed of a volatile storage device such as RAM, and a program 142 held in the storage device 121. A central processing unit 143 such as a CPU that performs various determinations, computations, and control processes as well as performing overall control of the device itself by reading and executing, a power conversion device A129, a power conversion device B130, a power conversion device C131, and a power conversion device 132 And a communication device control unit 140 that performs communication with other devices 103 and the like, and communication with the server 101 via the communication network 150. The storage device 121 stores at least conversion information 126, facility information 127, and transaction information 128 in addition to a program 142 for implementing functions necessary for the device 102 of the present embodiment.

Subsequently, functions provided in the device 102 of the present embodiment (the same applies to the other devices 103) will be described. As described above, the functions described below can be said to be functions implemented by executing the program 142 included in the apparatus 102, for example. However, the functions provided in the device 102 may be realized not only by an example implemented by a program but also by a dedicated hardware device corresponding to the corresponding function. When the device 102 receives data from the server 101 or the other device 103 via the communication device control unit 140, the power conversion device 129, 130, 131 is received in accordance with a control command from the server or the other device 103. , 132 (hereinafter referred to as power converters 129 and the like). In addition, it has a function of transmitting various data held by the device 102 to the server 101 or other devices 103 via the communication device control unit 140. In addition, it has a function of acquiring information from the server 101 or another device 103 via the communication device control unit 140 as necessary.

Further, the device 102 has a function of communicating with the power conversion device 129 and the like via the communication device control unit 140 to control the power conversion device 129 and acquiring the device state from the power conversion device 129 and the like.

The device 102 records the current status of the power conversion device 129, the control history, the type of connected device, the amount of power of the connected type, the group to which the device 102 belongs, and the power interchange devices that are group members, It has a reading function.

The hardware configuration of the power supply 135 is composed of distributed power supply devices such as solar panels and wind power generators. The power source 135 may have a function of communicating with the power conversion device A129. Further, the power supply 132 may have a function of supplying or stopping power according to a request from the power conversion device A129. The power source 135 may have a function of transmitting the current state and the amount of flowing power to the power conversion device A129. The power conversion device A129 may have the control function such as supply and stop and the power amount acquisition function.

The hardware configuration of the battery 133 is a storage battery such as a lead battery or a lithium battery. The battery 133 may have a function of communicating with the power conversion device B130. Further, the battery 133 may have a function of storing, discharging, or stopping power according to a request from the power conversion device B130. The battery 133 may have a function of transmitting the current state and the amount of flowing power to the power conversion device B130. The power conversion device B <b> 130 may have the control function such as power storage and discharge and the power amount acquisition function.

The load 134 is composed of an arbitrary power load such as household equipment or factory equipment. The load 134 may have a function of communicating with the power conversion device C131. The load 134 may have a function of consuming or stopping power according to a request from the power conversion device C131. In addition, the load 134 may have a function of transmitting the current state and the amount of flowing power to the power conversion device C131. The power conversion device C131 may have a control function such as consumption or stop in the previous period and a power amount acquisition function.

The system power line 160 is composed of a low-voltage distribution line, a high-voltage distribution line, and a self-employed line. The system power line 160 is connected to the power converter D132 and has a function of transmitting and receiving power.

The hardware configuration of the server 101 is as follows. The server 101 stores, in the internal memory 115, a storage device 114 composed of a suitable non-volatile storage device such as a hard disk drive, an internal memory 115 composed of a volatile storage device such as RAM, and a program 116 held in the storage device 114. Performs overall control of the device itself by reading and executing it, and communicates with the central processing unit 117 such as a CPU that performs various determinations, computations, and control processes, and the device 102 and other devices 103 via the communication network 150. A communication device control unit 113. The storage device 114 includes a group database 118 that is group information, an equipment information database 119 that is equipment information, and electric energy information, in addition to a program 116 for implementing functions necessary as the server 101 of the present embodiment. The electric energy information database 120 is stored at least.

Subsequently, functions provided in the server 101 of this embodiment will be described. As described above, the functions described below can be said to be functions implemented by executing the program 116 provided in the server 101, for example. However, the functions provided in the server 101 may be realized not only by an example implemented by a program but also by a dedicated hardware device corresponding to the corresponding function.

When the server 101 receives data from the device 102 or another device 103 via the communication device control unit 113, the server 101 needs to be in the storage device in response to a request command from the device 102 or the other device 103. It has a function to respond to data. Further, it has a function of acquiring various data possessed by the device 102 or other devices 103 via the communication device control unit 113. Further, it has a function of transmitting a control command to the device 102 or other devices 103 through the communication device control unit 113 and controlling the device 102 or other devices 103.

Further, the server 101 acquires the conversion information 126, the facility information 127, and the transaction information 128 from the device 102 or another device 103, records them in the facility management database 119 and the power information database 120, and reads them out as necessary. It has a function.

Further, the server 101 uses the data in the facility management database 119 and the power information database to calculate the power interchange group of the device 102 and other devices 103, records it in the group database 118, and recalculates as necessary. It has a function. Further, the calculation result has a function of transmitting information to the device 102 and other devices 103 through the communication device control unit 113 to control power interchange.

---- Data structure example ---
Next, an example of a data structure in a table used by the server 101, the apparatus 102, and other apparatuses 103 according to the present embodiment will be described.

FIG. 2 is a diagram showing an example of the group database 118 in the present embodiment. The group database 118 illustrated in FIG. 2 stores which group the device 101 and other devices 103 belong to, or which group the device 101 belongs to, and is managed by the server 101. The group database 118 is composed of data such as

group names

202, 203, and 204 to which the apparatus 101 and other apparatuses 103 belong, and

periods

211, 212, and 213 representing periods of the group configuration. This group database 118 is assumed that the server 101 is generated from the facility information and power amount information of the device 102 and other devices 103, or is generated by the administrator inputting data. it can. In addition, it is good also as a database which grasps | ascertains only the present group, without providing the column of a period.

FIG. 3 is a diagram showing an example of the facility management database 119 in the present embodiment. The facility management database 119 illustrated in FIG. 3 stores transmission / reception capabilities and power consumption capabilities of the device 102 and other devices 103 for each period, and is managed by the server 101. This equipment management database 119 includes a maximum power generation amount 301, a maximum power storage amount 303, a maximum load amount 304, an installation location 305, whether to give / receive information 306, and a period representing a period during which information is measured and recorded for each device 102 and other devices 103. It is composed of data such as 301. This equipment management database can be assumed to be generated from equipment information and transaction information of the device 102 and other devices 103, or generated by data input by an administrator. Further, the device 102 and the other devices 103 and the like acquire and manage the same information for each device (each column of 311, 312, and 313) and manage it in the facility information 127.

FIG. 4 is a diagram showing an example of the electric energy information database 120 in the present embodiment. The power amount information database 120 illustrated in FIG. 4 stores the facility information of the system power line 160, the transfer capability and power consumption capability of the device 102 and other devices 103 for each period, and is managed by the server 101. Yes. The power information database 119 includes the power supply amount 402 that represents the power supply capability amount during the unit period, the power reception amount 403 that represents the power reception capability amount during the unit period, and the power supply cost 404 necessary for power supply, for each device 102 and other devices 103. , And a data receiving cost 405 required at the time of power reception, and a period 401 representing a period during which information is measured and recorded. The power supply cost represents the cost for power supply, and includes, for example, the cost of transmitting the system power line 160 to give power, the cost of acquiring and installing the power source 135, and the cost of operating. The power receiving cost represents the cost of receiving power, and includes, for example, the cost of using the system power line 160 to receive power, the cost for acquiring and installing the battery 133, and the operating cost. This power amount information database 120 can be assumed to be generated from facility information and transaction information of the device 102 and other devices 103, or generated by inputting data by an administrator. Further, the device 102 and other devices 103 and the like acquire and manage similar information for each device (each column of 411, 412, and 413), and manage it in the facility information 128 and the transaction information 129.

--- Processing procedure example 1 ---
Hereinafter, the actual procedure of the control method of the power accommodation apparatus in the present embodiment will be described with reference to the drawings. Various operations corresponding to the control method of the power accommodation apparatus described below are realized by programs that are read and executed by the power accommodation apparatus 102 constituting the system 100, respectively, in an internal memory or the like. And this program is comprised from the code | cord | chord for performing the various operation | movement demonstrated below.

FIG. 5 is a flowchart showing a processing procedure example 1 of the control method of the server 101, the apparatus 102, and the other apparatus 103 in the present embodiment. Here, first, main processes executed by the server 101, the apparatus 102, and the other apparatuses 103 will be described. In this case, the server 101 performs device information acquisition 503 and transmits an information acquisition request 511 to the

devices

102, 103, 104, and 105. The

devices

102, 103, 104, and 105 receive the information acquisition request 511 and transmit the conversion information 126, facility information 127, and transaction information 128 to the server 101 as a response 512 for information acquisition.

Here, the server 101 performs the grouping calculation 504. The grouping calculation 504 updates the equipment management database 119 and the power information database 120 from the obtained conversion information 126, equipment information 127, and transaction information 128 for each device, performs the grouping calculation, and updates the group database 118. . Details of the grouping calculation will be described later.

Next, the server 101 performs grouping information transmission 504 and transmits a grouping control request 513 to the

devices

102, 103, 104, and 105. The

devices

102, 103, 104, and 105 receive the grouping control request 513, update the conversion information 126, facility information 127, and transaction information 128, and transmit that they have been received by the server 101 through the grouping control request response 514.

In the grouping calculation, the group 1 (202) is the device 102 and the device 103, and the group 2 (203) is the device 104 and the device 105, as indicated by 211 in FIG. The

devices

102, 103, 104, and 105 implement

power interchange

506, 507, 508, and 509 between the devices that are grouped in response to the control request. The conversion information 125, facility information 126, and transaction information 127 are updated as necessary.

Next, the server 101 performs accommodation result acquisition 510 and transmits an accommodation result acquisition request 515 to the

devices

102, 103, 104, and 105. The

devices

102, 103, 104, and 105 receive the interchange result acquisition request 515 and transmit the conversion information 125, the facility information 126, and the transaction information 127 to the server 101 with the interchange result acquisition response 516.

Here, the server 101 updates the equipment management database 119 and the power information database 120 from the obtained conversion information 126, equipment information 127, and transaction information 128 for each device, confirms the difference from the result assumed in the grouping calculation 504, If necessary, the grouping calculation is performed again, and the group database 118 is updated. The grouping recalculation will be described later. Here, as a result of the group recalculation, the group 1 (202) is the device 102 and the device 104, and the group 2 (203) is the device 103 and the device 105 as indicated by 212 in FIG.

Next, the server 101 performs grouping information transmission 512 and transmits a grouping control request 517 to the

devices

102, 103, 104, and 105. The

devices

102, 103, 104, and 105 receive the grouping control request 517, update the conversion information 126, the facility information 127, and the transaction information 128, and transmit that they have been received by the server 101 through the grouping control request response 518.

The process returns to 1 (501) in FIG. 5 (502). Re-execution from equipment information acquisition 503 Next, the details of the process of group selection 504 and group re-selection 511 in FIG. 5 will be described. FIG. 6 is a flowchart illustrating an example of a group determination processing procedure of the control method of the server 101 according to the present embodiment. First, it is determined whether or not a new device is added (601). The addition of a new device includes a case where the device 102 or another device 103 requests the server for power interchange, or a case where the server 101 asks the device for addition.

If a new device is added (601: Yes), device information addition processing is performed (602). In the addition of device information, the server 101 communicates with the device 102 and other devices 103, acquires various pieces of device information, and updates the facility management database 119 and the power amount information database 120. In this example, device addition has been described, but device deletion and device information update are performed in the same flow.

Next, as a first step of the group selection process of the power interchange apparatus, it is determined whether a large group division is necessary or not (603). The large group division is to classify a plurality of power interchange apparatus candidates themselves before selecting a plurality of power interchange apparatuses as a group. Taking this embodiment as an example, there are a total of eight power interchange devices, such as the device 102 and the other devices 103. Based on these conditions, large group division is classified into one large group 1 with

devices

102, 103, 104, and 105, and large group 2 with

devices

106, 107, 108, and 109, and then within large group 1. Group selection, group selection in large group 2.

判断 Judgment of whether large group division is necessary includes physical restrictions, legal restrictions, and performance restrictions. In the first example, there is a case where the device is physically separated and cannot be grouped and accommodated, such as a device on a remote island and a device on another remote island. In the second example, there is a case where the system power supply line 160 that performs power interchange does not have the ability to physically transmit power so that a large number of devices can simultaneously transmit and receive power. In particular, the second point is that the design of the existing transmission lines and distribution lines is designed to transmit unilaterally from the power generation upstream of the generator to the customer in a tree structure, so as to transmit bidirectionally in a mesh form In the case of flexible power accommodation, special consideration must be given to physical limitations. The physical restriction can be determined from the installation location 305 in the equipment management database 119.

The legal restriction is that the first example is that the power interchange between a certain device and a certain device is not permitted. As a second example, there is a case where a certain device has been penalized and has not been allowed power interchange, and has been informed of insufficient billing or false facility information or transaction information. Legal restrictions can be determined from the acceptance / rejection 306 in the equipment management database 119.

The performance limitation is the first example when the server 101 cannot select a group with a large number of devices, and it takes too much calculation time to select the group within the specified time. The second example is a case where the server 101 cannot acquire or request information of the device 102 and other devices 103, cannot collect all device information at the same time due to the influence of communication performance, and the group selection is not in time. is there. The performance limit can be determined from a calculation result log or a communication log stored in the program.

When large group division is necessary (603: Yes), large group division processing is performed (604). If the server 101 matches the above three types of restrictions from the equipment management database 119, the server 101 divides the group into large groups, calculates devices belonging to each group, and records them in the group database 118.

Next, the main process of selecting a group of power interchange devices is performed. First, it is determined whether or not a group is selected under all conditions (605). “Selecting a group by condition” means determining whether or not an arbitrary condition is satisfied for each group candidate, and leaving the candidate when satisfied. Selecting a group under all conditions means confirming whether a group candidate is satisfied under all prescribed conditions. This condition is recorded in the facility information 126 from the device 102 and other devices 103, recorded in the facility management database 119 of the server 101, or generated by the administrator inputting data. It can be assumed that there is. An example of selection based on conditions will be described in detail in Processing Procedure Example 2.

When group selection is performed based on all conditions (605: Yes), the selected group is transmitted to the apparatus and control of power interchange is started (607). The server 101 transmits group information to the device 102 and other devices 103 to instruct power interchange between the devices.

When group selection is not performed based on all conditions (605: No), group division processing is performed based on each condition (606). Based on the respective conditions, the group division process 606 performs a three-stage process. First, group candidates that can be combined with all candidate devices are calculated. Next, a group that can be executed when a certain condition is satisfied is selected from the calculated group candidates. Finally, it is confirmed whether the group selected based on the condition is physically executable. If it is not possible, the group is excluded from the candidates. This processing will be described later in processing procedure example 2. Next, it is determined whether or not a group selection is necessary again (608). Whether it is necessary to select a group again is determined based on the power interchange result in the group selection. If the power interchange result is significantly different from the initial condition (608: Yes), group selection is performed again (609). The selection of this condition will be described later. If it is not necessary to select a group again (608: No), it is confirmed whether a predetermined time has passed (610). When the predetermined time has not elapsed (610: No), power interchange is executed and it is confirmed whether another group selection is necessary (608). If the predetermined time has elapsed (610: Yes), it is determined whether a new device has been added (601). The passage of a certain time includes, for example, one week and one month. A certain time interval is determined for recalculation in large group division units. Further, the period in which the power fluctuation is small may be set long, and the period in which the power fluctuation is large may be set short.

--- Example of processing procedure 2 ---
The group selection based on the condition (606) will be described with reference to FIGS. 7, 8, 9, and 10. FIG.

FIG. 7 is a diagram showing a physical connection configuration example of the power interchange network in the present embodiment. This power accommodation network includes power accommodation device A 701 (hereinafter referred to as device A), power accommodation device B 702 (hereinafter referred to as device B), power accommodation device C (hereinafter referred to as device C), and power accommodation device D (hereinafter referred to as device D). It consists of a stand. Each device is connected by a transmission line capable of transmitting power. Apparatus A and apparatus B have a power transmission line 712, apparatus A and apparatus C have a transmission line 711, apparatus A and apparatus D have a transmission line 715, and apparatus B and apparatus D have a transmission line 713. Yes, devices C and D have power transmission lines 714 that can transmit power to each other. Note that the power transmission line in this case only needs to be able to transmit power regardless of whether it is physically connected or logically connected.

FIG. 8 is a diagram showing an example of the transmittable capacity in the transmission line of the power interchange network shown in FIG. 7 in the present embodiment, and the equipment management database 119 of the server 101 based on the conversion information 126, equipment information 127, and transaction information 128. To store. Device A 811 has 5, 10, 1, the amount of power that can be transmitted to device B 802, device C 803, and device D 804. The amount of power that can be transmitted from the device B 812 to the devices A 801, C 803, and D 804 is 5, 0, and 10. The device C813 has 10, 0, 3 that can transmit power to the devices A801, B802, and D804. The device D 814 has the possible power transmission amounts of 1, 10, 3 to the device A 801, the device B 802, and the device C 803. As described above, in the power interchange network of FIG. 7, the devices A701 and B702 can transmit the transmission amount 5 to each other, the devices A701 and C703 can transmit the transmission amount 10 to each other, and the devices A701 and D704 transmit power. Device B 702 and device D 704 can transmit power to each other with power transmission amount 10, and devices C 703 and D 704 can transmit power to each other with power transmission amount 3.

FIG. 9 is a diagram illustrating an example of facility information included in the apparatus of the power interchange network illustrated in FIG. 7 in the present embodiment. The conversion information 126, the facility information 127, and the transaction information 128 are used to store the facility information in the facility management database 119 of the server 101. Store. A power generation amount 901, a storage amount 902, a load amount 903, a basic accommodation amount 904, and a maximum accommodation amount 905 for each of the devices A911, B912, C913, and D914 are shown. The power generation amount 901 is a power generation amount that can be generated by the target device per unit time. The storage amount 902 is a storage amount that the target device can store per unit time. In this example, it is assumed that the discharge amount is that the target device can discharge per unit time. The load amount 903 is the amount of power consumed by the target device per unit time. The basic accommodation amount 904 is the amount of power that can be transmitted to another device per unit time of the target device. A plus indicates that power can be transmitted and a minus indicates that it is necessary to receive power. The maximum accommodation amount 905 is the maximum amount of power that can be transmitted to another device per unit time. The difference from the basic accommodation amount 904 is that all the stored amount is discharged and used for power accommodation. is there.

FIG. 10 shows how many types of groups can be created when there are a total of four devices, device A 701, device B 702, device C 703, and device D 704 in FIG. This process can be processed as a combination problem. Since there are four devices, there are a total of 15 types of combinations from pattern 1 (1011) to pattern 15 (1025). With each combination, each device can be combined into group 1 (1001), group 2 (1002), group 3 (1003), and group 4 (1004).

FIG. 11 is an example of selecting an appropriate group based on the conditions from the pattern of FIG. 10 in the present embodiment, and the information is stored in the group database 118 of the server 101 from the conversion information 126, the facility information 127, and the transaction information 128.

FIG. 11 includes patterns 1 (1111) to 15 (1126) similar to FIG. In the initial state (1101), all patterns are “present”. Next, an effective pattern is selected from the patterns 1 (1111) to 15 (1126) based on four types of conditions 1 (1102) to 4 (1105). In this example, Condition 1 (1102) is selected based on whether or not physical accommodation is possible (1131), Condition 2 (1103) is selected based on whether or not stable supply is possible (1104), and Condition 3 (1104) is determined based on the interconnection capacity. Selection according to (1133), Condition 4 (1105), shows selection by device smooth use (1134).

First, condition 1 (1102) and physical availability (1131) are shown. In FIG. 9, “physical interchangeability” refers to selecting a pattern incapable of physically transmitting power based on the amount of physical power transmission in devices A, B, C, and D in FIG. 9. In FIG. 9, since the devices B and C cannot transmit power to each other, the pattern in which only the devices B and C are grouped out of the patterns 1 to 15 in FIG. 10 is invalidated. In FIG. 11, pattern 10 (1121) and pattern 13 become invalid after selection of condition 1 (1102). Subsequently, Condition 2 (1103) and stable supply availability (1132) are shown. Whether stable supply is possible or not is determined by selecting a pattern in which the power interchange amount in the group is 0 at the minimum. This condition means that the power can be always supplied stably, that is, the power interchange amount becomes negative and does not cause a power outage. In FIG. 9, when the accommodation amount of the device C becomes negative and there is a group in which the device C is independent, stable power supply cannot be received. Thus, in FIG. 11, pattern 4 (1115), pattern 7 (1118), pattern 11 (1122), pattern 13 (1124), and pattern 15 (1126) are invalid.

Subsequently, condition 3 (1104) and interconnection capacity determination (1133) are shown. The interconnected line capacity determination is to select a case where power can be interchanged between apparatuses but power interchange is not possible due to a limit of a transmission capacity for accommodating. As can be seen from FIG. 8, the transmittable capacity between the devices is known, and in FIG. 9, it is necessary to supply power to the device C. Thus, in FIG. 11, pattern 2 (1113) is first invalidated. This is because the device BCD belongs to the group, but only the device D can be supplied to the device C, and the amount of power that can be transmitted is only 1, so the power interchange amount of the device C becomes negative. Pattern 6 (1117) is also invalidated. This is because the device CD belongs to the group, and only the device D can be supplied to the device C, and the power transmission amount is only 1, so that the power interchange amount of the device C becomes negative. For the same reason, the pattern 14 (1125) is also invalidated.

Finally, condition 4 (1105) and equipment smooth use (1134) are shown. The smoothing use of equipment is not to generate or store electricity only by a specific device but to select a group in which all terminals use the equipment as evenly as possible. Here, pattern 5 (1116) is invalid. This is because only the device D performs accommodation on its own and discharges the stored power to balance it, so that only the device D places a burden on the equipment. For the same reason, the pattern 9 (1019) is also invalid.

Pattern 1 (1112), Pattern 3 (1114), and Pattern 9 (1120) remaining under the above conditions are final candidates. An arbitrary pattern is selected from these. The selection method includes, for example, a method using random or a calculation formula described later.

――― Processing procedure example 3 ――――
The example of the regroup selection process (609) by the accommodation result in a present Example is shown. After selecting the group, the following criteria will be set for the power accommodation. Using power generation amount A per hour, power storage amount B per hour, and usage amount C per hour, A + BC = P, where P is a criterion. A is α × f (t) and is represented by a function of time and a weighting factor α. Total power generation changes with time. B is β × g (t) and is expressed by a function of time and a weighting coefficient β. The total amount of stored electricity changes with time. C is γ × h (t) and is represented by a function of time and a weighting coefficient β. Total usage varies with time. In the case of P = 0, it indicates that power interchange is executed with the most balanced power generation, power storage, and load.

Define satisfaction when regrouping. Satisfaction is defined by the price per virtual unit power. The amount of power to be calculated and the amount of power to be consumed are each given a price. Basically, it is solved by exchanging money. Here, the satisfaction level is a value from +2 to -2. Consider the following five numerical values. (1) When A + B−C = 0, the maximum satisfaction is +2. (2) When P (maximum)> A + B−C> 0, the supply is high but inefficient, so the satisfaction level is high + 1. Or it is set to 0 as a standard. (3) When A + B−C> P (maximum), the satisfaction level is set to −1 because of excessive supply. (4) When P (minimum) <A + B−C <0, the demand is high, so the satisfaction level is low −1. (5) When A + B−C <P (minimum), the degree of satisfaction is at least −2 because of excessive demand. Based on the satisfaction value, the server 101 can determine whether to perform group selection again.
For group re-selection, a group candidate that has not yet been selected in the pattern 1, pattern 3, and pattern 9 remaining in the group candidate selected in FIG. 11 is selected as a new group. Alternatively, there is a method of selecting the group by changing the conditions again, or updating the equipment management database 119 and the electric energy information database 120 and selecting the group again.
Although the best mode for carrying out the present invention has been specifically described above, the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.

According to the present embodiment, when power accommodation is executed, a plurality of power accommodation control terminal groups can be created based on arbitrary conditions to control power accommodation.

記載 At least the following will be made clear by the description in this specification. That is, every time a group is selected based on the above conditions, physical restrictions, legal restrictions, performance restrictions, and the like may be added as in the case of the large group division. In particular, as a physical limitation, since the output of the distributed power supply varies depending on the amount of solar radiation and the wind direction, even if the power interchange amount is satisfied, it may be deleted from the group candidates in order to ensure a stable supply. Similarly, as a physical limitation, the power generation sites are lithium batteries and lead batteries, and the speed of discharge is different. In order to ensure a stable supply as in the case of the distributed power source, even if the power interchange amount is satisfied, it may be deleted from the group candidates.

Also, the satisfaction degree defined as the evaluation of group re-election may be added to the above conditions. A group may be selected so that satisfaction is always high.

In addition to the above conditions, a policy of a user or an administrator who uses the power interchange device may be added. For example, an index called QoL (Quality of Life) is defined as a user or administrator policy, and QoL is expressed by an objective function composed of a plurality of indices. QoL = A × f (x) + B × g (y) +... + Z × a (z), and A, B,..., Z are weighting factors, and each index is temporarily independent. The index is expressed by a weighting factor and a function. Examples of each index include “like / dislike” and “more / less”.
“Like / dislike” = “constraint condition” + “individual difference (weighting coefficient)” × “experience (index)”. In this case, “experience” can be calculated from the transaction information 127 and the facility information 126 of the device 102. A typical example of “like / dislike” is temperature. Pleasure of feelings and discomfort based on temperature can be used as a grouping determination factor.
“Large / low” = “Restriction conditions (such as a range that can be accommodated)” + “Occupancy rate (weighting factor)” × “Asset (index)”. The “operating rate” varies in relation to the transaction information 127 of the device 102. Further, “assets” is “maximum amount of power generation and power storage” and can be calculated from the facility information 126 and conversion information 127 of the apparatus 102. In addition, "age of equipment" can be expressed in this formula. A representative example of “large / small” is money, and the profit and loss based on money can be used as a judgment factor for grouping.

In the group selection of FIG. 11, the group selection is performed in the order of physical interchangeability (1131), stable supply availability (1132), interconnection capacity determination (1133), and equipment smooth use (1134). However, the order may be changed, and the priority may be changed according to conditions. For example, if the consumer is a general household, the group selection may be made such that the transaction amount is given priority over the stable supply, and if the consumer is a factory, the stable supply is given priority over the transaction amount.

Also, in the group selection, patterns that do not meet the conditions are invalidated, but by adding a large number of members, fluctuations when the power generation amount, power storage amount, and load amount fluctuate may be absorbed.

DESCRIPTION OF SYMBOLS 100 Power interchange network system 101 Server 102 Power interchange apparatus 103-109 (Other) Power interchange apparatus 113 Server communication equipment control part 114 Server storage apparatus 115 Internal memory 116 Program 117 Central processing unit 118 Server database 119 Facility management Database 120 Electric energy information database 121 Storage device 126 of power interchange device Conversion information 127 Facility information 128 Transaction information 129 Power conversion device A
130 Power Converter B
131 Power converter C
132 Power converter D
132 Power supply connected to power accommodation device 133 Battery connected to power accommodation device 134 Load connected to power accommodation device 140 Communication equipment controller 141 of power accommodation device 142 Internal memory of power accommodation device 142 Power accommodation device Program 143 Central processing unit 160 of power interchange device System power line

Claims

In an asynchronous interconnection network system between power systems composed of a plurality of multi-terminal type asynchronous interconnection devices, the power interchange policy, facility information, control information, and transaction information of the interconnection devices are acquired by communication, A plurality of interconnections that have a database consisting of accommodation policy, facility information, power system accommodation policy, facility information, and transaction information on interconnection devices, and that uses the database to operate interconnection devices with maximum efficiency. An asynchronous interconnection network system between power systems, comprising: an arithmetic unit that calculates a group including devices.
In the asynchronous interconnection network system between electric power systems according to claim 1,
The arithmetic unit is:
An asynchronous interconnection network system between power systems, comprising: an arithmetic unit that compares a predetermined evaluation index after an arbitrary time has elapsed after creation of the calculation group and calculates a group again when it is not good.
In the asynchronous interconnection network system between electric power systems according to claim 2,
The arithmetic unit is:
An asynchronous interconnection network system between power systems, comprising: an arithmetic unit that calculates a group in consideration of physical restrictions of transmission line capacity, control time, and transmission distance in creating the calculation group.