JP2011188656A - Method and system for controlling distributed power supply - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for controlling a distributed power supply for allocating the amount of power receivable from distributed power supply devices in a power network, to the distributed power supply devices, and controlling operating time zone and stop time zone of the distributed power supply devices, and also to provide a system for controlling the distributed power supply. <P>SOLUTION: The distributed power supply control system 10 is constituted of a center server 20 and communication devices 30. The method for controlling the distributed power supply determines the operating time zone and the stop time zone of the distributed power supply devices 50 disposed in a distributed manner in a power network. The method includes: a first step for acquiring the amount of power that can be received by the power network from the distributed power supply devices 50 for every time zone within a predetermined time period; and a second step for allocating the amount of receivable power preferentially to the distributed power supply devices 50 which have been stopped for a longer period of time, for every time zone, and determining that the allocated distributed power supply devices 50 are in operation in the operating time zone, while determining that the distributed power supply devices other than those determined to be in operation are suspended in the time zone. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a distributed power supply control method for determining an operation time zone and a stop time zone of a distributed power supply apparatus distributed on a power network, and a distributed power supply control system in which the distributed power supply control method is implemented.

  Traditionally, most of the companies and customers who have large-scale power plants exchange power with power companies, and because of the need for stable operation of the power network, In order to connect to the power plant, it was necessary to adjust the connection conditions and install predetermined equipment. However, if a large number of small distributed power supply devices such as photovoltaic power generation devices, which will become increasingly popular in the future, will be introduced, small-scale power generation facilities will be scattered on the power network. A mechanism has been proposed (see, for example, Patent Document 1).

JP 2007-151371 A

  As described above, when a large number of distributed power supply devices such as solar power generation devices are introduced, small-scale power generation facilities are distributed on the power network, but for stable operation of the power network, It is necessary to efficiently transmit and control the amount of power that can be supplied from the distributed power supply device to the power network to each distributed power supply device.

  The present invention has been made in view of such a problem. Based on power network operation information (power supply information), the power amount acceptable from the distributed power supply device is determined, and this power amount is transferred to the distributed power supply device. It is an object of the present invention to provide a distributed power control method capable of assigning and controlling these operation time zones and stop time zones, and a distributed power control system in which this control method is implemented.

  In order to solve the above-mentioned problem, a distributed power supply control method according to the present invention is a distributed power supply control method for determining an operation time zone and a stop time zone of distributed power supply devices distributed on a power network. A first step of acquiring an amount of power that can be received by the power network from the distributed power supply device for each period defined by a predetermined time width in a time range (for example, every hour in a range of 24 hours); Each time, the amount of power that can be received is preferentially distributed to distributed power supply units that have a large amount of lost power generation, which is the amount of power that could have been generated due to being stopped by past control. A second step of determining that the power supply apparatus is in operation during the period and determining that the distributed power supply apparatus other than that determined to be in operation is stopped during the period.

  In such a distributed power supply control method according to the present invention, the second step is to generate a power loss from the record of the amount of solar radiation at the place where the distributed power supply is installed and the record of the stop time of the distributed power supply. It is preferred to calculate the amount.

  In the distributed power supply control method according to the present invention, the second step divides the area where the power network is arranged into a plurality of regional areas, manages the distributed power supply device for each regional area, and distributes It is preferable to be configured to determine operation and stop of the power supply apparatus for each area.

  In the distributed power supply control method according to the present invention as described above, the second step assigns the distributed power supply device to one of the groups defined by two or more, and determines the operation and stoppage of the distributed power supply device for each group. It is preferable to be configured to do so.

  In addition, a distributed power supply control system according to the present invention includes a center server that determines an operation time zone and a stop time zone of distributed power supply devices distributed on a power network by any of the above-described distributed power supply control methods, And a control unit that operates and stops the distributed power supply according to the server determination.

  In such a distributed power supply control system according to the present invention, it is preferable that the control unit is configured to generate a random value with a predetermined time width and correct the operation and stop times with this random value.

  When the distributed power supply control method and the distributed power supply control system according to the present invention are configured as described above, the amount of power that can be accepted from the distributed power supply apparatus is determined based on the operation information (power supply information) of the power network, and this amount of power is determined. Can be assigned to the distributed power supply device to control these operation time zones and stop time zones.

It is explanatory drawing which shows the structure of a distributed power supply control system. It is a functional block diagram of a distributed power supply control system. It is explanatory drawing which shows the data structure of acceptable amount information. It is explanatory drawing which shows the data structure of weather performance information. It is explanatory drawing which shows the data structure of stop performance information. It is explanatory drawing which shows the data structure of the information managed by a control part, Comprising: (a) shows attribute information, (b) shows driving schedule information. It is a flowchart which shows the process in a center server. It is explanatory drawing which shows the data structure of the data used in the process in a center server, Comprising: (a) shows the state which combined weather performance information and stop performance information, (b) is the state which rearranged the information Indicates. It is explanatory drawing which shows the data structure of command information. It is a flowchart which shows the reception process of the command information in a communication apparatus and a distributed power supply device. It is explanatory drawing which shows the driving schedule information of the updated state. It is a flowchart which shows the operation start and stop process of a distributed power supply device. It is explanatory drawing which shows embodiment at the time of comprising by changing the function sharing of a communication apparatus and a distributed power supply device.

(Overall system configuration)
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the configuration of the distributed power supply control system according to the present invention will be described with reference to FIGS. 1 and 2. The distributed power supply control system 10 updates the operation schedule information of the distributed power supply device 50 such as a photovoltaic power generator installed in a consumer, thereby reducing the amount of power flowing from the distributed power supply device 50 into the power network. Coordinate and operate the power network stably.

  As shown in FIG. 1, the distributed power supply control system 10 is attached to each of the center server 20 that creates command information for updating the operation schedule information of the distributed power supply device 50 and the distributed power supply device 50. And a communication device 30 that receives and outputs to the distributed power supply device 50. The center server 20 and the communication device 30 are connected via a network 40 so that command information can be transmitted from the center server 20 to the communication device 30. Here, the network 40 may be configured by wired communication including a metal communication network such as an optical communication network or ADSL, or may be configured by wireless communication including a mobile phone, PHS, or wireless LAN, A combination of wired communication and wireless communication may be used. The center server 20 is connected to a power supply planning system 60 for controlling the operation of the entire power network.

  As shown in FIG. 2, the center server 20 includes a data processing unit 21 that processes data for generating command information for the distributed power supply device 50, and a control data generation unit 22 that generates command information based on the data. And a data transmission unit 23 that transmits the command data to the communication device 30. In addition, the center server 20 includes an acceptable amount database 24 in which information on the acceptable amount of power in the power supply area included in the power supply plan information created by the power supply planning system 60 is stored, and within a predetermined period in the past. As a default, the weather record database 25 storing the solar radiation record for each time zone for each area in the area, the stop record management database 26 storing the record of stopping the distributed power supply apparatus 50, and the distributed power supply apparatus 50 as initial values. A master calendar database 27 for storing the operation schedule information. Note that the data processing unit 21, the control data generation unit 22, and the data transmission unit 23 are implemented as programs executed by the center server 20, for example. The acceptable amount database 24, the weather record database 25, the stop record database 26, and the master calendar database 27 are configured by a storage device such as a hard disk provided in the center server 20.

  The distributed power supply device 50 is configured to include a distributed power supply unit 56 that generates power and a control unit 57 that controls the operation of the distributed power supply unit 56, and the control unit 57 includes the distributed power supply unit 56. The calendar database 55 storing the driving schedule information, the processing unit 51 for updating the driving schedule information stored in the calendar database 55 by the command information transmitted from the center server 20, and the driving stored in the calendar database 55 According to the schedule information, a schedule determination unit 52 that determines the operation start or stop time of the distributed power supply unit 56 and a time adjustment unit 53 that corrects the operation start or stop time determined by the schedule determination unit 52 are included. . In addition to the calendar database 55 described above, the distributed power supply device 50 stores setting information for storing attribute information of the distributed power supply device 50 (information on the area where the power supply device is installed, information on the group to which the user belongs). A database 54 is provided. The processing unit 51, the schedule determination unit 52, and the time adjustment unit 53 are configured by programs and logic circuits executed by the CPU included in the distributed power supply device 50. The setting information database 54 and the calendar database 55 are distributed power supply devices. 50 includes a hard disk, a flash memory, and the like.

  The communication device 30 receives command information transmitted from the center server 20 and outputs the command information to the distributed power supply device 50. The communication device 30 includes a program executed by a CPU included in the communication device 30 and a logic circuit. A data receiving unit 31 is provided.

(data structure)
Next, the structure of data stored in each database will be described with reference to FIGS. In the following description, an area where power is supplied by one electric power company, that is, the entire electric power network managed by the electric power company is referred to as a “supply area” and is divided to manage the electric power network in the supply area. Things are called “regional areas”. In the following description, each regional area is identified by being assigned a unique number. Regardless of the regional area, the distributed power supply device 50 in the supply area is assigned to one of a plurality of predetermined “groups” (for example, in the figure, 10 A to J The number of which can be set freely).

  The information stored in the acceptable amount database 24 (hereinafter referred to as “acceptable amount information 240”) relates to the amount of power that can be accepted by the power network from the distributed power supply device 50 in the power supply area, and has a predetermined time. Minutes (for example, 24 hours) are collected and the planned values planned by the power supply planning system 60 are acquired and stored in the acceptable amount database 24. As shown in FIG. 3, the acceptable amount information 240 is composed of one record 241 for each time. The record 241 includes a time zone column 242 indicating a time zone, and the distributed power supply device 50 in the time zone. An acceptance column 243 that indicates whether or not the power network can accept power, and a percentage column that indicates what percentage of the total power generation amount of all the distributed power supply devices 50 can be accepted when it can be accepted. 244 and a parameter column 245 in which a parameter for correcting the parallel solution time of the distributed power supply device 50 for the power network is stored, as will be described later. In FIG. 3, as information set in the reception column 243, “o” is used when power from the distributed power supply device 50 can be received, and “x” is displayed when the power cannot be received. For example, it may be expressed as “1” when it is acceptable and “0” when it is not acceptable. Further, without providing the ratio column 244, all power from the distributed power supply device 50 is accepted (that is, 100%) when it can be received, and all power from the distributed power supply device 50 is received when it is not possible. You may comprise so that it may not accept (that is, it will be 0%). The reverse is also possible. In other words, the receiving column 243 may not be provided, and only the ratio column 244 may be configured to manage 100% as ◯ and 0% as x. Further, the information in the parameter column 245 may be set by the power supply planning system 60, or may be set by the center server 20 after receiving the power supply plan information from the power supply planning system 60.

As shown in FIG. 4, the weather record information 250 stored in the weather record database 25 stores the record of the amount of solar radiation for each time as the past weather record for a predetermined period for each area. The weather performance information 250 includes a date column 251 indicating the date of actual performance, a region column 252 indicating a regional area, and a solar radiation amount column 253 indicating the actual amount of solar radiation in the regional area. In addition, for example, data of a weather forecast company is used as the result of the solar radiation amount, and a value in the range of 1 to 0 is stored for each of the above regional areas (for example, 1.2 MJ / m ² as solar radiation data or A real number such as 0.5 W / m ² , or the weather is digitized and the clear value is set to 1 and the value is reduced according to the amount of solar radiation). The solar radiation amount column 253 stores, for example, data for 24 hours from 0:00 to 23:00 every hour, but it may be only in the daytime.

  The stop record information 260 stored in the stop record management database 26 includes the last day when the distributed power supply device 50 was stopped for each area and each group in the area, and the area and group in the past predetermined period. The results of the time for each day when the distributed power supply device 50 belonging to the system is stopped are stored. As shown in FIG. 5, the stop record information 260 includes a region column 261 indicating a region area, a group column 262 indicating a group, a last stop date column 263 indicating a last stop date, and a daily / hourly period in a predetermined period. And a stop time column 264 indicating a stop time for each band.

  The master calendar database 27 stores initial values of operation schedule information set in the distributed power supply device 50 controlled by the distributed power supply control system 10. The data structure of the operation schedule information will be described later. Here, for example, when the same information is set for each supply area, region area, and group, the initial value of the operation schedule information may be stored in the master calendar database 27 for each region area and group. Alternatively, an identification number may be assigned to each individual distributed power supply device 50, and all operation schedules may be stored individually using the identification information as a key.

  The setting information database 54 stores attribute information 540 such as a supply area where the distributed power supply device 50 is installed, a regional area, and a group assigned to the distributed power supply device 50. As shown in FIG. 6A, the attribute information 540 includes a region column 541 in which a region area is stored and a group column 542 in which a group is set. These pieces of information are set at the time of shipment or when installed at a consumer.

  The calendar database 55 stores the operation schedule information 550 of each distributed power supply device 50 in units of days and for each time zone (or may be stored in units of days). As shown in FIG. 6B, the operation schedule information 550 includes a schedule date column 551 that represents a schedule date, and further includes a time column 552, a distributed power supply device 50 provided for each schedule date column 551. An operation state column 553 in which the availability of operation of the power source is stored, and a parameter column 554 in which a parameter for adjusting the parallel solution time of the distributed power supply device 50 is configured as one record for each time zone. Yes. When the distributed power supply device 50 is installed, an initial value is set for the parameter column 554. In the present embodiment, the operation state column 553 is set to “◯” when it can be operated, and “x” when it cannot be operated.

(Description of processing)
The processing in the distributed power supply control system 10 having such a configuration will now be described with reference to FIGS. In the following description, the center server 20 will describe a case where command information for the distributed power supply device 50 for the next day is generated. That is, the center server 20 is configured to generate command information for the next day every day. However, the present invention is not limited to such a configuration, and the center server 20 may be configured to generate, for example, command information for one week of operation schedule information every week. Further, in the following description, the distributed power supply control system 10 of the present invention controls the distributed power supply apparatus 50 belonging to one supply area, and the power supply plan information from one power supply planning system 60 that manages this supply area. The case of receiving the will be described.

(Processing in the center server)
First, the processing of the center server 20 will be described. The processing of the center server 20 is shown in FIG. The center server 20 activates the data processing unit 21 at a predetermined time, and obtains a sunshine amount actual result for each area for a predetermined period (for example, for the past one year) from the weather result database 25 for each hour. Acquired from the outage record management database 26, the final stop date for each area and group, and the stop time for each day for a predetermined period (for example, the past one year), and the amount of lost power generation for each area and group As shown in FIG. 8A, these data are combined for each area and group (step S100). The loss power generation amount is obtained by integrating the amount of sunlight and the stop time on each day of the predetermined period acquired in the above process, and further obtaining the sum of the results in the predetermined period, The value corresponding to the amount of power that can be generated is regarded as the loss of the customer.

  Then, as shown in FIG. 8 (b), the data combined in this way is first sorted in descending order of the lost power generation amount, and then sorted in order of the last stop date (step). S101). That is, a regional area and a group with a large amount of lost power generation are positioned at the top of the data, and a local area and a group near the last stop date are positioned at the top of the data.

  Next, the center server 20 activates the control data generation unit 22, receives the rearranged data combined by the data processing unit 21 as described above, and further accepts the next day from the acceptable amount database 24. Read quantity information. From these pieces of information, the amount of power that can be accepted by the power network is calculated for each time period, and the amount of power is assigned in order from the data rearranged by the data processing unit 21 (step S103). For example, consider a case where the distributed power supply device 50 in the supply area is assigned to 100 groups. As shown in FIG. 3, when the acceptable ratio at 10:00 is 60%, one group when it is divided into 100 groups corresponds to 1% of the total output amount, so it is assigned to 60 groups. be able to. Therefore, in the rearranged data shown in FIG. 8B, the 60 groups from the one with the largest amount of power loss are set as output targets (power generation acceptance targets). And the command information 290 transmitted to each distributed power supply device 50 is produced | generated from the information allocated in this way (step S104). At this time, the operation schedule information set as the initial value in the control unit 57 of the distributed power supply device 50 is read from the master calendar database 27 to generate command information 290. That is, the driving schedule information stored in the master calendar database 27 is used for areas other than the area, group, and time zone to which driving is permitted as acceptable. For example, FIG. 9 shows the data structure of the command information 290, which is composed of a region column 291 indicating a region area, a command date column 292 indicating a command date, and driving information 293 for each time zone and group. The Here, the operation information 293 includes a time zone column 294 that indicates a time zone, operation availability information 295 that indicates whether the operation is enabled or disabled for each group, and a parameter column 296 for adjusting the parallel solution time. Consists of records. In the operation availability information 295 in FIG. 9, “◯” indicates that operation is possible, and “x” indicates that operation is not possible. In addition, a value stored in the acceptable amount information 240 is set as a parameter for adjusting the parallel solution sequence time. Further, information related to a plurality of supply areas including other supply areas is collectively transmitted to a certain supply area, and information related to the supply area is extracted based on the supply area information set in the distributed power supply device 50. Is also possible.

  Thus, when the command information 290 is generated by the control data generation unit 22, the data transmission unit 23 transmits the command information 290 to the communication device 30 (step S105). Note that the command information 290 may be transmitted to the communication devices 30 belonging to the area for each area, or the information generated for each area is collected into one piece of information for each supply area. The information may be transmitted to all the communication devices 30 belonging to the supply area (in the following description, the latter case of “collectively transmitting” will be described).

(Reception processing in communication devices and distributed power supply devices)
Next, processing of the communication device 30 and the distributed power supply device 50 will be described. The processing of the communication device 30 and the distributed power supply device 50 is shown in FIG. When the command information 290 is transmitted from the center server 20, the data receiving unit 31 of the communication device 30 receives the command information 290 and outputs it to the processing unit 51 of the distributed power supply device 50 (step S110). Then, the processing unit 51 extracts the data of the area area and group to which the distributed power supply device 50 belongs from the command information 290, and updates the operation schedule information 550 of the calendar database 55 based on the extracted information. (Step S111). In addition, the area area and group to which each distributed power supply device 50 belongs are stored in the setting information database 54 as described above, and the processing unit 51 refers to this information. FIG. 11 shows schedule information 550 in a state updated with the above-described command information 290. As shown in FIG. 6, in the initial schedule information, the operation was not possible from 9:00 to 11:00 on May 7, 2010, but has been rewritten to be operable based on the command information 290.

(Control of operation of distributed power supply)
The distributed power supply device 50 controls the operation and stop of the distributed power supply unit 56 based on the operation schedule information 550 stored in the calendar database 55. Specifically, as shown in FIG. 12, the schedule determination unit 52 of the distributed power supply device 50 reads the operation schedule information 550 from the calendar database 55 (step S120), and at the time when the availability status changes. It is determined that the operation or stop of the power supply unit 56 is switched (step S121). For example, in FIG. 11, the schedule on May 7, 2010 can be operated until 11:00 and cannot be operated after 12:00. Therefore, the schedule determination unit 52 determines to stop the operation of the distributed power supply unit 56 at 12:00, and transmits the parameters set as the operation schedule information 550 to the time adjustment unit 53. The time adjustment unit 53 generates a random value between −30 [minutes] and +30 [minutes] based on the parameter transmitted from the schedule determination unit 52, and adds the random number value to the determined time. Thus, the operation start (parallel) or operation stop (disconnection) time is corrected (step S122). Then, the distributed power supply unit 56 is started or stopped at the corrected time (step S123). For example, when the time determined by the schedule determination unit 52 is 12:00 and the random number generated by the time adjustment unit 53 is −15 [minutes], the operation is stopped at 11:45 and the random number is +20 [ Minutes], stop at 12:20.

  As described above, the power flowing from the distributed power supply device 50 such as a solar power generation device to the power network changes depending on the weather and the state of power usage by the customer. If it increases, stable operation of the power network becomes difficult. Therefore, as described above, the amount of power that can be received from the distributed power supply device 50 is determined based on the power supply plan information by the power supply planning system 60, and the operation of the distributed power supply device 50 is performed so as not to exceed this acceptable power amount. By controlling, stable operation of the power network can be realized.

  At this time, the distributed power supply device 50 whose operation has been stopped is managed by the stop result management database 26, the loss power generation amount calculated from the solar radiation amount and the stop time is large, and the number of days is short since the last stop. By preferentially assigning the operation from the one, it is possible to alleviate the unfairness of the consumer who installs the distributed power supply device 50, particularly the customer who is controlled to stop the operation.

  Moreover, the command information 290 and the schedule information 550 are managed for each time zone, and it becomes difficult to ensure the stability of the power network when the distributed power supply device 50 starts or stops operation at the same time. Therefore, based on the parameters, each distributed power supply device 50 independently generates a random number and distributes the time when the operation starts or stops (time when the power supply network is paralleled or disconnected) to operate the distributed power supply device 50. The stability of the power network by starting or stopping can be maintained. In addition, by transmitting a specific area number that designates all the area areas as targets, the same information can be efficiently and efficiently distributed to all the area areas in a certain supply area. Similarly, in all supply areas, a special number is assigned to all supply areas, so that distribution can be performed simultaneously to all supply areas.

  In the above description, the number of distributed power supply devices 50 assigned to each group and the total output amount in that group need not be uniform. Moreover, when performing the said control with respect to several supply area, it can implement | achieve by acquiring the amount which can be received from an electric power feeding plan system for every supply area, and performing the said process for every supply area. Or you may calculate the output amount subtotal of the area area and a group from the number of the distributed power supply devices 50 allocated to each area area and a group, and the average value of a rated value. In the above description, the operation and stop of the distributed power supply device 50 are determined for each time zone. However, the operation and stop may be determined on a daily basis.

  Furthermore, in the above description, information related to the amount of sunshine in the past is stored in the weather record database 25, and the daily stop record is stored in the stop record management database 26, whereby the power loss amount is calculated from the information. Thus, although the distributed power supply device 50 to which the operation is assigned is determined, the present invention is not limited to this determination method. For example, information on the weather forecast for the day to which the operation is assigned is acquired, and the operation is preferentially assigned to the distributed power supply devices 50 belonging to the local area and group having a good weather forecast (sunny forecast). The device 50 can also be operated efficiently.

  Moreover, although the above description demonstrated the case where the control part 57 which controls the action | operation of the distributed power supply part 56 which has an electric power generation function in the distributed power supply apparatus 50 based on schedule information in this distributed power supply apparatus 50, for example, As shown in FIG. 13, these functions can be provided in the communication device 30. In FIG. 13, the same functions as those described above are denoted by the same reference numerals, and detailed description thereof is omitted. Alternatively, the communication device 30 can be eliminated by mounting the data receiving unit 31 mounted on the communication device 30 as a function of the control unit 57 of the distributed power supply device 50.

DESCRIPTION OF SYMBOLS 10 Distributed power supply control system 20 Center server 50 Distributed power supply device 57 Control part

Claims (6)

A distributed power supply control method for determining an operation time zone and a stop time zone of a distributed power supply device distributed on a power network,
A first step of acquiring an amount of power that the power network can accept from the distributed power supply device for each period defined by a predetermined time width within a predetermined time range;
Preferentially to the distributed power supply device having a large amount of lost power generation, which is the amount of power that would have been able to be generated originally, by stopping the amount of power that can be accepted by the past control for each period. A second step of allocating and determining that the distributed power supply device is operating during the period, and determining that the distributed power supply device other than the determined operating is stopped during the period;
A distributed power supply control method.   2. The dispersion according to claim 1, wherein the second step calculates the loss power generation amount from a record of a solar radiation amount at a place where the distributed power supply device is installed and a record of a stop time of the distributed power supply device. Power control method.   The second step divides an area where the power network is arranged into a plurality of regional areas, manages the distributed power supply device for each regional area, and operates and stops the distributed power supply device in the regional area. The distributed power supply control method according to claim 1, wherein the method is determined every time.   The second step is configured to allocate the distributed power supply device to any one of two or more defined groups and to determine operation and stop of the distributed power supply device for each group. The distributed power supply control method according to any one of the above. A center server that determines an operation time zone and a stop time zone of distributed power supply devices distributed on the power network by the distributed power supply control method according to any one of claims 1 to 4,
A distributed power supply control system comprising: a control unit that operates and stops the distributed power supply device according to the determination of the center server.   The distributed power supply control system according to claim 5, wherein the control unit is configured to generate a random value with a predetermined time width and correct the operation and stop times with the random value.

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