JP6009369B2 - System facility planning support apparatus and method - Google Patents

Description

  The present invention relates to a system facility planning support apparatus and method.

  A three-phase power system normally supplies power by a combination of a three-phase power source and a single-phase AC line in a so-called equilibrium state in which the voltages or currents of the three phases are equal and the phase difference is 120 °. However, the balance of the phase connection of distributed power sources connected to a single phase of the power system, such as solar power generation devices and wind power generation devices that have become widespread in recent years, is biased, and the amount of power generation and demand in three phases is unbalanced. It is expected that the degree and frequency of the so-called voltage unbalanced state will be increased by the occurrence of balance and the difference in voltage between the three phases and the phase difference deviating from 120 °. Therefore, the load rating capacity of the power system, the load demand rate, the unbalance rate obtained from the voltage and current measurement values of multiple time sections are stored, and the upper and lower limit values of the line voltage change amount and the load transfer amount upper and lower limit values are There is a technique for calculating the load movement amount for eliminating the voltage imbalance of the power system by optimization calculation with the objective function of minimizing the voltage imbalance.

JP 2009-124913 A

  Conventionally, the load rating capacity of the power system, load demand rate, unbalance rate obtained from the voltage and current measurement values of multiple time sections are stored, and from these, the upper and lower limit values of the line voltage change amount and the upper and lower limit values of the load movement amount , And the load transfer amount for eliminating the voltage imbalance of the power system can be obtained by optimization calculation with the objective of minimizing the voltage imbalance. However, optimally calculating the load shift amount of the power system does not necessarily lead to an actual voltage imbalance solution. For example, the degree of voltage imbalance that can be caused by a distributed power source such as a solar power generation facility installed in a region is specifically determined by the cloud condition if it is a meteorological condition in a predetermined region, or a solar power generation facility. Because it depends on the change in the amount of solar radiation due to, etc., the actual situation for eliminating the voltage imbalance state due to the relationship between the power generation amount of the three phases of the power system and the demand amount in the customer load caused by the change in the amount of solar radiation The above solution is necessary.

  The purpose of the present invention is to provide a range of possibilities for estimating voltage unbalanced state due to mass linkage of distributed power sources such as photovoltaic power generators to the power system, i.e. Estimated to the extent that no countermeasures need to be taken, presents so that the facility planner can properly grasp the voltage unbalanced state, and further supports the elimination of the voltage unbalanced state appropriately from the facility planning stage The object is to provide an equipment plan support apparatus and a system equipment plan support method.

  Disclosed system facility planning support device is the location data of solar radiation measurement points that have the possibility of voltage imbalance typical in a three-phase power system in a given area, and distribution of time series solar radiation changes at the measurement points Solar radiation time series distribution data including data, rated power generation capacity data of newly installed solar power generation equipment, connection phase combination data of existing equipment to each phase of the three-phase power system, and each phase of the three-phase power system From the system equipment database comprising the connection position data indicating the geographical coordinates of the existing equipment, the position data of the measurement points included in the solar radiation time series distribution data of the system equipment database and the distribution data of the time series solar radiation change, Unbalanced connected phase combination generation to generate unbalanced connected phase combination data to be a combination of connected phases when an unbalanced state can occur between the three phases of a three-phase power system A phase-specific power generation unit that generates phase-specific power generation data for each phase of the three-phase power system from the generated unbalanced connection phase combination data and the power generation capacity data of the grid facility database. An unbalanced state index generation unit is provided that calculates the degree of unbalanced state at a predetermined line position of the three-phase power system from the data and the connection position data of the grid facility database to generate unbalanced index data.

The position data of the solar radiation measurement point is a geographical position condition of voltage imbalance that may occur by connecting a distributed power source such as a solar power generation facility to a three-phase power system. The connection position data is a position condition on the voltage unbalanced power system that may occur by connecting a distributed power source such as a photovoltaic power generation facility to a predetermined position of the three-phase power system.
The disclosed system facility planning support device also eliminates the unbalanced state between the three phases of the three-phase power system from the unbalance index data at the predetermined line position of the three-phase power system and the generated phase-specific power generation data. An unbalanced state elimination connection phase combination data generation unit for generating such connection phase combination data is provided.

  According to the present invention, when the facility planner implements the facility plan to eliminate the voltage unbalanced state in the possible range based on the actual measurement data by the distributed power source such as the photovoltaic power generation facility, the voltage is excessively increased. It is possible to provide a system facility planning support apparatus and a system facility planning support method for supporting facility planning so that the cost for solving the unbalanced state is not incurred.

It is a figure which shows the structure of a system installation plan support system. It is an example of the electric power grid which schematized electric power grid data. It is an example of electric power system data. It is an example of the solar radiation amount time series distribution data of a several photovoltaic power generation equipment proximity | contact point. It is an example of the power generation capacity data of a plurality of distributed power sources. It is an example of the connection phase combination data of a some distributed power supply. It is an example of the geographical connection position data on the electric power system of a some distributed power supply. It is a flowchart of a process of a system installation plan support apparatus. It is a flowchart of an unbalanced connection phase combination generation unit. It is a flowchart of a process of a generation power capacity data generation part according to phase. It is a flowchart of the process of an unbalanced state parameter | index production | generation part. It is a flowchart of a process of an unbalanced state cancellation | release phase combination production | generation part.

A system facility planning support apparatus that supports appropriate installation of a distributed power source such as a photovoltaic power generation facility in a three-phase power system has the following configuration. First, the solar radiation that includes the position data of the solar radiation measurement point where there is a possibility that a typical voltage imbalance may occur in the three-phase power system in a given area, and the distribution data of the time series solar radiation change at the measurement point Volume time series distribution data, rated power generation capacity data of newly installed solar power generation equipment, connection phase combination data of existing equipment to each phase of the three-phase power system, and existing equipment to each phase of the three-phase power system And a connection facility data indicating the geographical coordinates of the system facility database.
The system facility planning support device uses the position (coordinates) data of the measurement points included in the solar radiation time series distribution data in the grid equipment database and the distribution data of the time series solar radiation variation between the three phases of the three-phase power system. The combination data of the unbalanced connection phase is generated so that the combination of the connection phases in the case where an unbalanced state can occur is generated, and from the generated unbalanced connection phase combination data and the generation capacity data of the system facility database, three Generate phase-specific power generation data for each phase of the phase power system, and determine the degree of unbalance at a given line position in the three-phase power system from the unbalanced connection phase combination data and the connection position data in the system facility database. Calculate and generate unbalance index data, and use the unbalance index data at the specified line position of the three-phase power system and the generated power generation data for the three-phase power system. By generating the connection phase combination data as to eliminate unbalanced, supporting plans for installation of distributed power generation of the solar power generation or the like in the predetermined area. Hereinafter, the present embodiment will be described with reference to the drawings.

  FIG. 1 shows the configuration of a system facility planning support system. The system facility plan support system 1 includes a facility database 102, an input device 103, an output device 104, and a system facility plan support device 101. Each of the input device 103 and the output device 104 is connected to the system facility planning support device 101 by a cable 9999 that can transmit data in both directions.

  The equipment database 102 holds data related to a power system in a predetermined area (hereinafter referred to as “facility data”). The facility data includes, for example, data related to equipment such as large power plants, distributed power sources, transmission / distribution lines, substations (transformers) and / or voltage control devices, and data related to line configurations of transmission / distribution lines. . Furthermore, the facility data includes, for example, the solar radiation amount time series distribution of the photovoltaic power generation facility as the distributed power source, the wind power generation time series distribution of the wind power generation facility, and the connection positions (distributed) where the respective distributed power sources are phase-connected. Data on the power generation capacity of each distributed power source and the number of the power pole where the pole transformer to which the power source of the power source is connected is installed and the relative coordinate location on the map). For example, the facility database 102 may be provided in the system facility plan support apparatus 101 itself, or may be provided from an electric power company or an affiliated company thereof.

  The input device 103 is an interface for a user to give a predetermined instruction to the system facility planning support device 101. The input device 103 includes, for example, a keyboard, a mouse, a touch panel, and / or buttons.

  The output device 104 is an interface for providing predetermined information to the user from the system facility planning support device 101. The output device 104 includes, for example, a display, a speaker, and / or an LCD.

  The system facility plan support apparatus 101 is an apparatus that supports planning of the arrangement of power facilities related to the power system. The system facility plan support apparatus 101 according to the present embodiment mainly supports planning of arrangement of solar power generation facilities. However, the system facility plan support apparatus 101 is not limited to the support for the arrangement of the photovoltaic power generation facilities. For example, the system facility plan support apparatus 101 may be used to support the arrangement of other distributed power sources such as wind power generation facilities.

  The system facility plan support apparatus 101 relates to the distribution of the relative position of the power generation level of a single-phase distributed power source installed in a predetermined area and the time, for example, in the case of solar power generation, when the amount of solar radiation Series distribution data 105, generation capacity data 106 of the distributed power source, connection phase combination data 107 relating to a combination of phases connecting the photovoltaic power generation equipment to the three-phase power system, and each phase of the three-phase power system Between the three-phase power system of the three-phase power system of the photovoltaic power generation facility in the case where an unbalanced state may occur between the three phases of the three-phase power system and the equipment database 102 that stores the connection position data 108 indicating geographical coordinates An unbalanced connected phase combination generating unit 113 that generates unbalanced connected phase combination data 109, which is a combination of connected phases, and a phased power generation generating unit 114 that generates three-phase phase generated power data 110. The unbalanced state index generation unit 115 for generating the unbalanced index data 111 by calculating the degree of the voltage unbalanced state at a predetermined line position in the three-phase power system, and the unbalanced state canceling phase combination of the voltages in the three phases An unbalanced state elimination phase combination generation unit 116 that generates data 112.

  The functions related to these elements 102 to 116 are realized by using, for example, a central processing unit (CPU), a memory, and a storage device (all not shown) included in the system facility planning position support apparatus 101. For example, when the CPU reads a predetermined computer program from the storage device into the memory and executes it, the functions according to the above-described elements 102 to 116 are realized.

The facility database 102 acquires, registers, and holds power system data in a predetermined region from a power system database held by a power system management organization such as a power company. Hereinafter, an example of power system data will be described with reference to the drawings.
FIG. 2 shows an example of a power system diagram in which power system data in a certain region is diagrammed.

  As shown in the power system diagram 200, the distribution system L1 includes, for example, a substation TR203, a storage battery BT204, a switch CB205, a branch point N206, a solar power generation facility PV207, a wind power generation facility WT208, and an automatic voltage regulator (hereinafter, “ SVR (Step Voltage Regulator) ”209 and reactive power compensator (hereinafter referred to as“ SVC (Static Var Compensator) ”) 210 are installed.

  The substation TR203 converts the voltage of the upstream (power plant side) power system into a voltage suitable for the downstream (customer side) power distribution system. The storage battery BT 204 is charged with electric power (hereinafter referred to as “supplied power”) supplied from the power plant to the consumer through the electric power system, and is discharged to compensate for the shortage. The switch CB205 switches the distribution system line when maintenance or failure occurs in the distribution line. The branch point N206 branches the distribution system line. The photovoltaic power generation facility PV207 generates power by receiving sunlight. Wind power generation facility WT 208 receives wind power to generate power. The photovoltaic power generation facility PV207 and the wind power generation facility WT208 are also referred to as distributed power sources. The electric power generated by the distributed power source such as the solar power generation facility PV207 or the wind power generation facility WT208 is also supplied to consumers through the distribution system line. The SVR 209 adjusts voltage fluctuations in the power distribution system using mechanical taps. The SVC 210 electrically adjusts voltage fluctuations in the distribution system. An EV facility (hereinafter referred to as “EVC (EV Charger)”) for charging a battery of an electric vehicle 211 (hereinafter referred to as “EV (Electric Vehicle)”) that uses electric power as a drive source, like a current gas station, It can be installed in various places such as streets and roadside areas or facility parking lots.

  The power system diagram is displayed on the output device 104 based on power system data (not shown) including facility data of facilities related to the power system as described above, which is held in the system facility database 102. The system facility plan support apparatus 101 is provided with a user interface so that the user can edit the layout of the displayed power system facilities.

  FIG. 3 shows an example of power system data in a certain area. The power system data 300 includes a substation area capacity 302, a bank capacity 303, and a feeder capacity 304 that are set for each hierarchy from upstream to downstream of the distribution line 301.

  Further, the power system data 300 includes a device model ID 305 that can uniquely identify a device installed on the distribution line 301, a position 306 where the device is installed, and various attribute information related to the device. The power system data has, for example, a primary (upstream) voltage 307 as first attribute information, and a secondary (downstream) voltage 308 as second attribute information. Note that the power system data 300 illustrated in FIG. 3 is merely an example, and information regarding various power systems may be held.

  The facility database 102 holds data resulting from fluctuations in the amount of power generated for distributed power sources connected to the power system. For example, the solar power generation facility PV 207 holds the solar radiation amount time series distribution data 105. Hereinafter, an example of the solar radiation time series distribution data 105 will be described with reference to the drawings.

  FIG. 4 shows an example of solar radiation time-series distribution data of the proximity points of a plurality of photovoltaic power generation facilities in a certain area. The solar radiation amount time series distribution data 400 includes time step step series data 401, a plurality of pieces of point data 402 for measuring the amount of solar radiation in the time step step series data 401, and solar radiation amount distribution data 403 in the point data 402. . The time step interval series data 401 is set in a relatively short time step, for example, from 0.1 second to several minutes in order to capture weather fluctuations in detail. The plurality of point data 402 for measuring the amount of solar radiation is, for example, several kilometers to several tens of kilometers covering the entire power line called a feeder from a substation to a consumer in a distribution system that supplies power to consumers such as each household. This is an example in which in a region 450 of about four sides, the distance is distributed from several tens of meters to several hundreds of meters as a distance at which it can be understood that the weather conditions are different at a certain time. Each solar radiation amount of the solar radiation distribution data 403 is an example in which the solar radiation amount is held as a value converted into a voltage value V when the solar power generation facility generates power.

  The facility database 102 holds data relating to power generation capacity for distributed power sources connected to the power system. Hereinafter, an example of the power generation capacity data 106 will be described with reference to the drawings.

  FIG. 5 shows an example of power generation capacity data of a plurality of distributed power sources in a certain area. The power generation capacity data 500 includes, for example, a facility ID 501 of each solar power generation facility connected to a power system in a certain area, and a power generation capacity value 502 in the facility ID 501. The facility ID 501 is stored in the facility database 102 by having a customer such as a household register when installing the facility. The generated power capacity 502 is a specification value of the generated power capacity of the equipment introduced when the customer such as each household introduces the equipment, and the specified value of the generated power capacity of the replaced equipment when the equipment is replaced. To the equipment database 102. In the power generation capacity data 500, in addition to the equipment ID 501 and the generated power capacity 502, specification values related to the equipment may be held together. The same data is retained when the distributed power source is a wind power generation facility.

  The equipment database 102 holds data relating to combinations of connected phases for a distributed power source that is single-phase connected to the power system. Hereinafter, an example of the connection phase combination data 107 will be described with reference to the drawings.

  FIG. 6 shows an example of connection phase combination data of a plurality of distributed power sources in a certain region. The connection phase combination data 600 includes, for example, a facility ID 501 of each photovoltaic power generation facility connected to a power system in a certain area and a phase ID 602 of the connection phase in the facility ID 501. The facility ID 501 is the same ID as the facility ID 501 in the power generation capacity data 500 or an ID that corresponds to each other. The equipment ID 501 is held in the equipment database 102 by having a consumer such as a household register when installing the equipment. In the phase ID 602 of the connection phase, when a customer such as each household introduces equipment, the result of construction by the equipment construction company is registered and held in the equipment database 102. The same data is retained when the distributed power source is a wind power generation facility.

  The facility database 102 holds data related to geographical connection positions on the power system for the distributed power sources connected to the power system. Hereinafter, an example of the connection position data 108 will be described with reference to the drawings.

  FIG. 7 shows an example of geographical connection position data on a power system of a plurality of distributed power sources in a certain region. The connection position data 700 includes, for example, a facility ID 501 of each photovoltaic power generation facility connected to a power system in a certain region, a power pole ID 705 to which a service line to which the facility is connected is connected, a sales office ID 702 to which the power pole belongs, It is composed of a feeder ID 703, a line ID 704, and a relative position coordinate (logical position coordinate) 706 on the system diagram of the utility pole, or a position longitude and latitude (physical position coordinate) 707 representing the absolute position of the utility pole. . The facility ID 501 is the same ID as the facility ID 501 in the power generation capacity data 500 or an ID that corresponds to each other. The facility ID 501 is stored in the facility database 102 by having a customer such as a household register when installing the facility. The telephone pole ID 705, the sales office ID 702, the feeder ID 703, the track ID 704, the position coordinates 706, and the position longitude and latitude 707 were constructed by the facility construction company of the equipment when each household consumer introduced the equipment. The result is registered and stored in the equipment database 102. The feeder is a power distribution system downstream from the substation as shown in FIGS. 2 and 3, and the line represents a part of the power distribution system forming the feeder portion.

  FIG. 8 shows a flowchart of processing of the system facility plan support apparatus. Hereinafter, a use case including a user operation will be described with reference to FIG.

  The user performs an installation plan of the photovoltaic power generation facility, a facility ID 501 in at least one newly installed solar power generation facility, a generated power capacity 502 in the generated power capacity data 500, and a sales office ID 702 in the connection position data 700. Feeder ID 703, line ID 704, utility pole ID 705, position coordinate 706, position longitude and latitude 707, and connection phase combination 602 of connection phase 1 and connection phase 2 in the planned temporary connection phase combination data 600 Is specified to the system facility planning support apparatus 101 using the input device 103 (S801). As the designated area, for example, a certain feeder unit corresponding to the downstream of the substation of the distribution system may be designated by the feeder name.

  In response to this, the unbalanced connected phase combination generation unit 113 reads the power system data 300 of the designated area held in the facility database 102 (S802). Here, the power system data 300 includes solar radiation time series distribution data 105 in a specified area, power generation capacity data 106 of an existing distributed power source in the specified area, and a plurality of distributed types in the specified area. The connection phase combination data 107 to the power system of the power source and the connection position data 108 to the power system of the plurality of distributed power sources in the designated area are included.

  At this time, the system facility planning support apparatus 102 reads the power system diagram data 200 of the designated area together with the power system data 300 of the designated area stored in the equipment database 102, and uses the output device 104. It may be presented to the user.

  The unbalanced connection phase combination generation unit 113 includes the solar radiation time series distribution data 105 in the designated area, the power generation capacity data 106 of the existing distributed power source in the designated area, and a plurality of distributions in the designated area. From the connection phase combination data 107 to the power system of the type power supply and the connection position data 108 to the power systems of the plurality of distributed power sources in the designated area, the three-phase unbalanced state in the power system in the designated area is determined. After calculating the equilibrium rate, unbalanced connected phase combination data 109 is generated and stored in the equipment database 102 (S803).

  The system facility planning support apparatus 101 automatically searches the power system data 300 for other items such as the corresponding sales office ID 702 by automatically registering the utility pole ID 705 in the connection position data 700 and automatically connects the connection position data 700. You may make it register to.

  The phase-specific power generation amount generation unit 114 reads the unbalanced connection phase combination data 109 of the designated area and the power generation capacity data 106 of the photovoltaic power generation equipment connected to the power system of the designated area (S804). .

  The phase-specific power generation amount generation unit 114 generates the unbalanced connection phase combination data 109 including at least one photovoltaic power generation facility newly installed in the designated area and the power generation capacity data 106 in the designated area. Phase-specific power generation data 110 is generated and stored in the equipment database 102 (S805).

  The unbalanced state index generation unit 115 indicates the unbalanced state in the power system in the designated area from the connection phase combination data 107, the connection position data 108, and the unbalanced state connection phase combination data 109 to the power system of the distributed power source in the designated area. The unbalanced state index data 111 to be expressed is generated (S806).

  The unbalanced state elimination phase combination generation unit 116 is connected phase combination data 107 to the power system of the solar power generation facility in the designated area, phase-specific power generation amount data 110 of the solar power generation facility in the designated area, The unbalanced state index data 111 is read (S807).

  The unbalanced state elimination phase combination generation unit 116 is connected phase combination data 107 to the power system of the solar power generation facility in the designated area, phase-specific power generation amount data 110 of the solar power generation facility in the designated area, From the unbalanced state index data 111, unbalanced canceled connection phase combination data 112 is generated and held in the equipment database 102 (S808).

  The system facility planning support apparatus 101 reads out the unbalanced connection phase combination data 112 of the designated area stored in the facility database 102 and presents it to the user using the output device 104 (S809).

  FIG. 9 shows a flowchart of the process (S803 in FIG. 8) of the unbalanced connection phase combination generation unit 113 that generates a combination of connection phases that are in an unbalanced state in the power system of the designated region.

  The unbalanced connected phase combination generation unit 113 extracts a time section that maximizes the solar radiation amount deviation at a plurality of solar radiation measurement points in the solar radiation time-series distribution data 105 in the designated area read from the equipment database 102 ( S901).

  For example, when a solar radiation amount measurement point A1 has a solar radiation amount of 0.31V and a solar radiation amount measurement point B1 has a solar radiation amount of 3.65V in a time section T1 with solar radiation time series distribution data, these deviations When 3.34V is larger than the deviation of the solar radiation amount at any two solar radiation measurement points in any time cross section of the solar radiation time-series distribution data in the region (Vmax), the time cross section T1 is obtained. Let it be a solar radiation amount deviation maximum time section (Tmax). In the solar radiation amount deviation maximum time section Tmax, there is a possibility that a typical voltage imbalance may occur in the three-phase power system.

  In the unbalanced connection phase combination generation unit 113, in the solar radiation amount deviation maximum time section Tmax, the solar radiation amount has a higher solar radiation amount measurement point (PUm, m = 1, 2,...) And a lower solar radiation amount measurement point Tmax. The solar radiation amount measurement point (PDn, n = 1, 2,...) Is classified (S902).

  The unbalanced connection phase combination generation unit 113 classifies the photovoltaic power generation facilities already connected to the designated area for each connection phase, and counts the number of connections of each connection phase (S903).

  The unbalanced connected phase combination generation unit 113 calculates the generated power capacity for each phase combination from the generated power capacity data 106 of the already installed photovoltaic power generation facility (S904).

  In the following S905 to S907, the unbalanced connected phase combination generation unit 113 sets the phase of the connected photovoltaic power generation facility so that the unbalance rate, which is the degree of unbalanced voltage in the power system in the designated area, becomes the largest. Assign connections and solar radiation.

  The unbalanced connected phase combination generation unit 113 associates the solar radiation amount of the higher solar radiation amount measurement point PUm previously classified with the phase combination having the largest generated power capacity, and for other phase combinations. The solar radiation amount of the lower solar radiation amount measurement point PLn is assigned (S905).

  For example, when the three phases of the power system are the U phase, the V phase, and the W phase, the connection phases of the single-phase solar power generation facility are three types of the UV phase, the VW phase, and the WU phase. When the total power generation amount of the photovoltaic power generation facilities in the designated area connected to the phase becomes the largest, the solar radiation amount of the upper solar radiation measurement point PUm is increased in descending order of the power generation amount of the solar power generation facility connected to the UV phase. Assign in order. The remaining VW phase and WU phase are assigned the solar radiation amount of the lower solar radiation amount measurement point PLn.

  The unbalanced connected phase combination generation unit 113 calculates the unbalance rate in the designated area with respect to the allocation result of the existing solar power generation facility and the solar radiation time series distribution data in the designated area assigned in processing step S905. (S906).

  The point where the unbalance rate in the designated area is calculated is the position on the power system where the new solar power generation facility will be installed, and the unbalance rate is generally calculated from the power system data. Alternatively, it may be calculated as a ratio of the negative phase voltage to the positive phase voltage based on the voltage value or current value obtained by a known current flow calculation method. In addition, for the point where the unbalance rate is to be calculated, the unbalance rate at the point at the feeder end of the power system in the designated area may be calculated.

  The unbalanced connected phase combination generation unit 113 determines whether or not the unbalance rate in the designated area is the maximum with respect to the allocation result of the existing solar power generation facility and the solar radiation time series distribution data 105 in the designated area. (S907).

  If the determination result is YES in processing step S907, the unbalanced connected phase combination generation unit 113 updates the maximum value of the unbalance rate (S908).

  In the processing step S907, when the determination result is No, the equilibrium state connected phase combination generation unit 113 does not update the maximum value of the unbalance rate and does not update the existing photovoltaic power generation facility and the solar radiation time series in the designated area. The processing returns to processing step S905 for reassigning the distribution data 105.

  The equilibrium state connected phase combination generation unit 113 registers the connection phase combination data 109 that maximizes the unbalance rate in the power system in the designated area in the equipment database 102 (S910).

  FIG. 10 shows a flowchart of the process (S805 in FIG. 8) of the phase-specific power generation capacity data generation unit 114 that generates the power generation capacity 110 for each phase of the photovoltaic power generation equipment connected to the power system in the designated area.

  The phase-specific power generation capacity data generation unit 114 extracts the power generation capacity data 106 of the already connected and newly connected solar power generation facilities in the power system in the designated area from the facility database 102 (S1001).

The phase-specific power generation capacity data generation unit 114 becomes unbalanced from the unbalanced connection phase combination data 109 in the power system in the designated area read from the equipment database 102 and the photovoltaic power generation equipment in the designated area and its connected phase. Extract correspondence with solar radiation. (S1002)
The phase-specific power generation capacity data generation unit 114 associates the power generation capacity data 106 of the solar power generation facility in the power system of the designated area with the unbalanced connection phase combination data 109 with the facility ID 501 as a key (S1003).

  The phase-specific power generation capacity data generation unit 114 aggregates the power generation amount for each connected phase of the photovoltaic power generation facility in the power system in the designated area, and generates phase-specific power generation amount data 110 that is in an unbalanced state (S1003).

  The phase-specific power generation capacity data generation unit 114 registers the phase-specific power generation amount data 110 that is in an unbalanced state in the facility database 102 in the power system in the designated region (S1004).

  FIG. 11 shows a flowchart of the process (S806 in FIG. 8) of the unbalanced state index generation unit 115 that generates the index 111 representing the unbalanced state in the power system in the designated area.

The unbalanced state index generation unit 115 obtains the connection phase combination data 107, the power generation capacity data 106, the connection position data 108, and the unbalanced state connection phase combination data 109 of the photovoltaic power generation facility in the power system of the designated area from the facility database 102. Read (S1101).

  The unbalanced state index generation unit 115 calculates the unbalance rate in the power system in the designated area (S1102).

  The point where the unbalance rate in the designated area is calculated is the position on the power system where the new solar power generation facility will be installed, and the unbalance rate is generally calculated from the power system data. Alternatively, it may be calculated as a ratio of the negative phase voltage to the positive phase voltage based on the voltage value or current value obtained by a known current flow calculation method. In addition, for the point where the unbalance rate is to be calculated, the unbalance rate at the point at the feeder end of the power system in the designated area may be calculated.

  The unbalanced state index generation unit 115 registers the unbalance rate as an unbalanced state index in the facility database 102 as the unbalanced state index data 111 in the power system in the designated area (S1103).

  FIG. 12 shows a flowchart of the process (S807 in FIG. 8) of the unbalanced state canceling phase combination generating unit 116 for phase-connecting newly installed photovoltaic power generation facilities so as to cancel the unbalanced state in the power system in the designated area.

The unbalanced state elimination phase combination generation unit 116 reads out the phase-specific power generation amount data 110 of the photovoltaic power generation facility in the power system in the designated area from the facility database 102. (S1201)
The unbalanced state elimination phase combination generation unit 116 reads the unbalanced state index data 111 in the power system in the designated area from the equipment database 102 (S1202).

  The unbalanced state elimination phase combination generation unit 116 temporarily connects the power generation amount of the newly installed solar power generation facility temporarily in the time section where the power system in the designated area is in an unbalanced state, and the existing solar power generation facility A combination of connected phases is generated so that a phase combination with a small amount of power generation of each phase of the connected power system is connected in order of increasing power generation amount of the newly installed solar power generation facility (S1203).

  The unbalanced state elimination phase combination generation unit 116 calculates the unbalance rate in the power system in the designated area in the state of the connection phase combination of the newly installed photovoltaic power generation facility generated in processing step S1203 (S1204).

  The unbalanced state elimination phase combination generation unit 116 determines whether or not the unbalance rate in the power system in the designated area has improved from the beginning (before the newly installed photovoltaic power generation facility is connected) (S1205).

  When the result of determining whether or not the unbalance rate in the power system in the designated area has improved from the beginning is Yes, the unbalanced state canceling phase combination generating unit 116 is the facility database 102 as the unbalanced canceling connection phase combination data 112. (S1206).

  If the result of determining whether or not the unbalance rate in the power system in the designated area has improved from the beginning is No in process step S1205, the unbalanced state elimination phase combination generation unit 116 returns to process step S1203 (S1205). ).

  When the allocation of the newly installed photovoltaic power generation facility is completed, the unbalanced state cancellation phase combination generation unit 116 presents the unbalanced cancellation connection phase combination data 112 registered in the facility database 102 to the user through the output device 104. (S1208).

  The unbalanced state cancellation phase combination generation unit 116, when presenting the unbalanced cancellation connection phase combination data 112 to the user through the output device 104, connects the connection phase to the power system of at least one photovoltaic power generation facility newly installed in the designated area. May be displayed in a list format including the equipment ID 501 and the connection phase combination character string (for example, UV phase).

  The unbalanced state cancellation phase combination generation unit 116, when presenting the unbalanced cancellation connection phase combination data 112 to the user through the output device 104, the connection position to the power system of at least one photovoltaic power generation facility newly installed in the designated area May be displayed on the power system diagram 200 in a display format that can be distinguished from other equipment, and the connection phase may be written in a character string.

  With the above processing, the user can easily know which phase the solar power generation facility newly installed in the power system in the designated area should be connected to eliminate the unbalanced state.

  In other words, according to the present embodiment, in the planning stage of introducing the photovoltaic power generation equipment to the power system in the designated area, a typical distinction that has a possibility of actually occurring in the distributed power source such as the photovoltaic power generation equipment. Based on the power generation data, it is possible to easily know more practical measures for avoiding the voltage imbalance state, and to support the facility planning.

  Furthermore, it is possible to deal with a voltage imbalance caused by an uneven phase connection of a distributed power source such as a photovoltaic power generation facility without excessive cost for the solution.

  The above-described embodiments of the present invention are examples for explaining the present invention, and are not intended to limit the scope of the present invention to these embodiments. Those skilled in the art can implement the present invention in various other modes without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 101 ... System equipment plan support apparatus, 102 ... Equipment database, 103 ... Input device, 104 ... Output device, 105, 400 ... Solar radiation time series distribution data, 106, 500 ... Power generation capacity data, 107, 600 ... Connection phase combination data 108, 700 ... connection position data, 109 ... unbalanced connection phase combination data, 110 ... phase generated power generation data, 111 ... unbalance state index data, 112 ... unbalance cancellation connection phase combination data, 113 ... unbalance state Connection phase combination generation unit, 114... Phase-specific power generation amount generation unit, 115... Unbalanced state index generation unit, 116.

Claims (10)

Insolation time series including location data of solar radiation measurement points that may cause voltage imbalance typical in a three-phase power system in a given area, and distribution data of time series solar radiation changes at the measurement points Distribution data,
Rated power generation capacity data for solar power generation facilities ,
System equipment database comprising connection phase combination data of existing equipment to each phase of the three-phase power system, and connection position data indicating geographical coordinates of the existing equipment to each phase of the three-phase power system,
Using the data included in the system facility database , the solar radiation amount at the time cross section where the solar radiation amount deviation of the plurality of solar radiation measurement points is the maximum, the magnitude of the upper solar radiation measurement point and the lower solar radiation measurement point And classify the connected solar power generation facilities for each connected phase and calculate the generated power capacity for each phase combination.The highest solar radiation measurement point for the phase combination with the largest generated power capacity Unbalanced connected phase combination data when the amount of solar radiation is assigned and the amount of solar radiation at the lower measurement point is assigned to the combination of phases with the smallest generated power capacity to determine the unbalance rate within the specified area. An unbalanced connection phase combination generator for generating
From the generated unbalanced connection phase combination data and the power generation capacity data of the grid facility database, a phase-specific power generation amount generating unit that generates phase-specific power generation data of each phase of the three-phase power system,
The unbalanced state index data is generated by calculating the degree of unbalanced state at a predetermined line position of the three-phase power system from the unbalanced connected phase combination data and the connection position data of the grid facility database. Equilibrium state index generator ,
From the unbalanced state index data at the predetermined line position of the three-phase power system and the generated power generation data for each phase, an unbalance that eliminates the unbalanced state between the three phases of the three-phase power system An unbalanced state cancellation phase combination generation unit that generates cancellation connection phase combination data,
A system facility planning support apparatus comprising: The grid facility database holds power grid data including facility data of the existing facilities related to the three-phase power grid, outputs a power grid diagram to an output device based on the power grid data, and outputs the power grid The system facility planning support apparatus according to claim 1 , further comprising a user interface for the user to edit the diagram. 3. The system facility planning support apparatus according to claim 1 , wherein the distribution data of the change in the amount of solar radiation is a time-series measurement value of the amount of solar radiation at the plurality of measurement points in the predetermined area. . The unbalanced connection phase combination generation unit is a combination of connection phases when connecting at least one single-phase distributed power source to any two phases of the three phases of the three-phase power system in the predetermined region. The system installation plan support apparatus according to any one of claims 1 to 3 , wherein combination data of connection phases that are in an unbalanced state among the three phases of the three-phase power system is generated.   6. The connection position data includes logical or physical position coordinates of a power pole to which a lead-in line connecting the existing facilities in the three-phase power system in the predetermined area is connected. The system installation plan support apparatus of Claim 1. Insolation time series including location data of solar radiation measurement points that may cause typical voltage imbalance in a three-phase power system in a given area, and distribution data of time series changes in solar radiation at the measurement points Distribution data, rated power generation capacity data of solar power generation equipment , connection phase combination data of existing equipment to each phase of the three-phase power system, and geographical coordinates of the existing equipment to each phase of the three-phase power system Is a system facility plan support method by a system facility plan support apparatus having a system facility database that stores connection position data indicating the system facility plan support apparatus,
Using the data included in the system facility database , the solar radiation amount at the time cross section where the solar radiation amount deviation of the plurality of solar radiation measurement points is the maximum, the magnitude of the upper solar radiation measurement point and the lower solar radiation measurement point And classify the connected solar power generation facilities for each connected phase and calculate the generated power capacity for each phase combination.The highest solar radiation measurement point for the phase combination with the largest generated power capacity Unbalanced connected phase combination data when the amount of solar radiation is assigned and the amount of solar radiation at the lower measurement point is assigned to the combination of phases with the smallest generated power capacity to determine the unbalance rate within the specified area. Produces
From the generated unbalanced connection phase combination data and the power generation capacity data of the grid facility database, generate phase-specific power generation data for each phase of the three-phase power system,
From the unbalanced connection phase combination data and the connection position data of the grid facility database, to calculate the degree of unbalance in a predetermined line position of the three-phase power system, to generate unbalanced state index data ,
From the unbalanced state index data at the predetermined line position of the three-phase power system and the generated power generation data for each phase, an unbalance that eliminates the unbalanced state between the three phases of the three-phase power system A system facility planning support method, characterized in that it generates resolved connection phase combination data . The system facility database holds power system data including facility data of the existing facility related to the three-phase power system, and the system facility planning support device uses a power system diagram as an output device based on the power system data. The system facility planning support method according to claim 6 , further comprising: a user interface for outputting and outputting the output power system diagram by a user. 8. The system facility plan support method according to claim 6 , wherein the distribution data of the solar radiation amount change is a time-series solar radiation measurement value at the plurality of measurement points in the predetermined area. . In the combination of connection phases when the at least one single-phase distributed power source is connected to any two phases of the three phases of the three-phase power system in the predetermined area, the system facility planning support device includes 9. The system facility plan support method according to claim 6, wherein combination data of connected phases that are in an unbalanced state among three phases of a phase power system is generated. The connecting position data, any of the claims 6-9, characterized in that it comprises a logical or physical location coordinates of utility pole that the existing facilities can lead feedthrough in the three phase power system of the predetermined region is connected The system facility planning support method according to claim 1.

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