JP2019126229A - Voltage adjustment unit of power distribution system, voltage adjustment system, voltage adjustment method and power distribution installation design support system - Google Patents

Abstract

To provide voltage adjustment unit of power distribution system, system and method which allow for such control as resolving output suppression by lowering the voltage at a photovoltaic power generation device installation point, and to provide a power distribution installation design support system.SOLUTION: An automatic voltage regulator 300 including a transformer with taps includes an impedance of each time zone derivative means for finding the impedance, i.e., the setting of the voltage adjustment unit, on the basis of information obtained from the power distribution system in a prescribed time zone, an amount of solar radiation acquisition means for finding the amount of solar radiation in a prescribed time zone, databases DB1, DB2 for storing the impedance and the amount of solar radiation in the same prescribed time zone in association, an impedance extraction means for finding the impedance at the time of reference amount of solar radiation by referring the database by the reference amount of solar radiation, and a tap adjustment means 340 for adjusting the taps so that the voltage at a virtual point of the power distribution system becomes a set voltage, by using the extracted impedance as the setting.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a voltage adjustment device, a voltage adjustment system, a voltage adjustment method, and a distribution facility design support system for a distribution system, and in particular, when the output of a solar power generation device installed in the distribution system is suppressed The present invention relates to a voltage regulator, a voltage regulator system, a voltage regulator method, and a distribution facility design support system for a distribution system that enables control to lower the voltage at a device installation point.

  In the power distribution system in recent years, grid interconnection of the solar power generation devices is increasing, but in the power distribution system, there is a phenomenon that the voltage of the solar power generation device installation point rises when the power generation amount of the solar power generation devices increases. . In order to avoid this, the solar power generation device is provided with a function to suppress the amount of power generation of the solar power generation device when the self terminal voltage rises above the specified voltage. This function limits the amount of power generation of the solar power generation apparatus.

  On the other hand, the voltage of the distribution system is determined by tap switching of a transformer (Load ratio switching transformer LRT: Load Ratio Control Transformer) installed at a distribution substation, or an automatic voltage regulator (SVR: installed at a distribution line). It is controlled by tap switching such as Step Voltage Regulator.

  In order to avoid the suppression of the amount of power generation in the solar power generation device described above, the voltage regulator (the on-load tap switching transformer LRT or the automatic voltage regulator SVR) adjusts the voltage of the distribution system and suppresses the output It is important to avoid. For that purpose, it is necessary to appropriately perform tap control according to the photovoltaic power generation device generation amount.

  The following method is known as a control method of a voltage regulator (The on-load tap switching transformer LRT and the automatic voltage regulator SVR).

  For example, Non-Patent Document 1 discloses a method of determining the tap value from the secondary side voltage at the self-end, the passing current, and the power factor in a normal automatic voltage regulator SVR.

  Patent Document 1 discloses a voltage fluctuation range obtained by adding a voltage rise width from the transmission voltage of the voltage adjustment transformer to the voltage at the highest voltage point and a voltage fall width from the transmission voltage of the transformer to the voltage at the lowest voltage point. A control scheme is shown to select the output voltage of the voltage regulator so that the center value is at the specified value.

  In addition, the secondary voltage (tap value) of the automatic voltage regulator SVR is adjusted according to the amount of solar power generation in the grid, and the amount of solar power generation at that time is the same as that of the solar power generation It is known to infer from communication between the voltage regulators SVR or from pyranometer information.

  The detailed configuration of the automatic voltage regulator SVR is also described in detail in Non-Patent Document 1. Moreover, it is known about the concrete calculation method of multiple regression analysis.

JP, 2009-240038, A

"Progress and Application of Line Voltage Regulators" Modern Power Distribution Technology, Electric School, pp. 128-134 (1972)

  In the method of determining the tap value from the secondary side voltage at the self end, the passing current, and the power factor according to Non-Patent Document 1 described above, control in consideration of voltage increase and output suppression by the solar power generation device is not assumed. Therefore, there is a problem that the automatic voltage regulator SVR can not perform voltage adjustment in a situation where a voltage rise is avoided by output suppression of the solar power generation device, and output suppression of the solar power generation device can not be avoided.

  Further, in the method described in Patent Document 1, in the situation where the voltage rise is avoided by the output suppression of the solar power generation device, the line voltage drop compensator of the voltage adjustment device can not be properly settled. There is a problem that it is not possible to avoid the output suppression of photovoltaic generation.

  In particular, the terminal voltage of a solar power generation device rises with the expansion of the solar power generation device connection of the general demander to the low voltage side and the interconnection of the mega solar to the distribution system end, and the solar power generation of the specific customer There is a problem that the output of the device is suppressed, and the loss of the selling opportunity occurs unequally.

  Furthermore, when trying to predict the voltage rise at the PV end using all the measured values of the distribution system, it depends on the combination of the load power factor of the distribution system and the PV power factor, and the distribution of the load and PV on the distribution system. , And the estimation accuracy of the voltage increase at the PV end decreases, and the SVR becomes inoperative.

  From the above, when the output of the solar power generation device installed in the distribution system is suppressed, the present invention enables control such that the voltage at the solar power generation device installation point is lowered to cancel the output suppression. , Voltage distribution apparatus for voltage distribution system, voltage adjustment system, voltage adjustment method, and distribution facility design support system.

  From the above, in the present invention, “the distribution with a tapped transformer which is installed in a distribution system including a plurality of solar power generation devices and adjusts a tap to set a voltage at a virtual point of the distribution system as a set voltage It is a voltage regulator of the grid, and based on the information obtained from the distribution grid within a predetermined time zone, a time for which an impedance which is a settling value of the voltage regulator is determined uniquely to the distribution grid in the predetermined time zone Band-based impedance deriving means, solar radiation amount obtaining means for obtaining solar radiation amount in a predetermined time zone, a database for storing the impedance and solar radiation amount in the same predetermined time zone, and reference with reference to the database by reference solar radiation amount Impedance extraction means for determining the impedance at the time of solar radiation, and distribution is performed using the extracted impedance as a settling value Is obtained by a voltage regulator. "Of the distribution system, characterized in that it comprises a tap adjusting means for adjusting the tap in order to the set voltage of the voltage at the virtual point of the system.

  Furthermore, in the present invention, “a transformer with a tap that is applied to a distribution system having a plurality of solar power generation devices and adjusts a tap to set a voltage at a virtual point of the distribution system as a set voltage, and a distribution facility design support system Voltage distribution system of the distribution system including the distribution system, wherein the distribution facility design support system is a voltage adjustment system that is determined uniquely to the distribution system in the predetermined time zone based on the information obtained from the distribution system within the predetermined time zone A time zone impedance deriving means for obtaining the impedance which is the settling value of the device, a solar radiation amount obtaining means for finding the amount of solar radiation in a predetermined time zone, and a database for storing the impedance and the amount of solar radiation in the same predetermined time zone The tapped transformer refers to the database according to the reference solar radiation amount to obtain the impedance at the reference solar radiation amount. A voltage adjustment system for a distribution system comprising: impedance extraction means for adjusting a voltage at a virtual point of the distribution system using the extracted impedance as a settling value, and adjusting taps to set the voltage at the virtual point of the distribution system as a set voltage. The

  Further, in the present invention, “the voltage of the distribution system provided with a tapped transformer which is installed in the distribution system provided with a plurality of solar power generation devices and adjusts the taps to set the voltage at the virtual point of the It is an adjustment method, and based on information obtained from the distribution system within a predetermined time zone, impedance which is a settling value of the voltage regulator determined uniquely to the distribution system in the predetermined time zone is determined. The solar radiation amount at the same time and the solar radiation amount in the same predetermined time zone is associated and stored, the impedance and the solar radiation amount stored in association are referred to, and the impedance at the reference solar radiation amount is extracted and extracted Distribution system characterized by adjusting a tap to set a voltage at a virtual point of the distribution system as a set voltage using the set impedance as a settling value It is obtained by the voltage adjustment method. ".

  In addition, the present invention “applies to a distribution system having a plurality of solar power generation devices and a tapped transformer which adjusts a tap to set a voltage at a virtual point of the distribution system as a set voltage according to a given settling value. Distribution system design support system for providing a settling value for estimating the voltage at the virtual point, wherein the distribution current of the tapped transformer is effective as information obtained from the distribution system within a predetermined time zone. Based on the component and the reactive component, and the potential difference between the tapped transformer and the plurality of photovoltaic devices, the impedance which is the settling value of the voltage regulator, which is uniquely determined in the distribution system in the predetermined time zone, is determined Time zone-specific impedance deriving means, photovoltaic power generation output obtaining means for obtaining a photovoltaic power generation output in a predetermined time zone, and the impedance and the sun in the same predetermined time zone It includes a database that associates and stores the generated output, in which the impedance extracted from the database and the distribution equipment design support system. "Of the distribution system, characterized in that it comprises an output means for providing the transformer with the tap.

  The voltage regulator and control method of the distribution system of the present invention can reduce voltage deviation of the distribution system even in a system in which a large amount of solar power generation and the like are introduced. There is an effect that the loss of the power selling opportunity can be reduced by reducing the output suppression amount of the specific solar power generation. Furthermore, by selecting and using the solar radiation amount and the settling value of the associated voltage adjustment device, it becomes possible to perform voltage adjustment with higher accuracy, and it is possible to reduce the output suppression amount of sunlight.

  Also, other effects of the present invention will be described in the specification.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the whole structure of the distribution installation design support system which concerns on this invention. Explanatory drawing which shows the structural example of a common distribution system and a voltage regulation system. The figure which shows the structure of the tap control apparatus of automatic voltage regulator SVR. The processing flow figure which avoids photovoltaic power generation output suppression by tap control operation. The figure which shows the flow of the data of a measurement means and a distribution installation design support system. The figure which shows the structure in the case of comprising the installation design support system 400 by a computer. 17 is a flow showing the processing content of the on-plane divided section determination unit 440 in the facility design support system 400. 12 is a flow showing the processing content of the upper rank ΔV extraction means 460 in the facility design support system 400. A flow showing the processing content of the multiple regression analysis means 480 in the facility design support system 400. The figure which shows the geometrical image of (alpha) and (beta) obtained in FIG. The figure which shows the Example equipped with the SVR settling value determination means 400A in automatic voltage regulator SVR. The figure which shows the surface area example of a distribution system extendedly arranged in the shape of a tree like via automatic voltage regulator SVR. The figure which shows only the solar power generation device PV which has correlation with the output suppression in the solar power generation device PV. The figure which shows the concept of 3-dimensional space by Irsvr, Iisvr, and (DELTA) V. The figure which shows the positional relationship of the plane obtained by the multiple regression analysis means by the extracted data. The figure which shows the relationship of the effect of conventional and the proposal system in this invention. The figure which shows the settling value selection part in SVR. The figure which shows the process of the matching means of the solar radiation amount and the setting value in an installation plan assistance system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 is a diagram showing a configuration example of a general distribution system and a voltage adjustment system. A typical distribution system 100 shown in FIG. 2 includes a node (bus) 120 and a distribution line 140 connecting them, a load 150 connected to the node 120, a solar power generator PV, and a sensor installed in the distribution line 140. It comprises 170, the distribution substation 110, etc. Here, the illustrated left side of the distribution substation 110 is the feeder side of the feeder, and the right side is the terminal side of the feeder.

  The automatic voltage regulator 300 is a voltage regulator that is installed in series with the line 140 and regulates the line voltage. Although the on-load tap switching transformer LRT and the automatic voltage regulator SVR are exemplified as the automatic voltage regulator 300, an example in which the automatic voltage regulator SVR is disposed as the voltage regulator 300 is shown here. The automatic voltage regulator SVR may be a load ratio switching transformer (LRT) in a distribution substation, but as illustrated in, for example, the automatic voltage regulator 300 in FIG. A signal from the sensor 170, which constitutes an automatic voltage regulator SVR comprising a transformer 305 composed of a winding transformer and a tap changer, and a control part 310, from the distribution facility design support system 400 The operation setting value 350 is used to operate the tap.

  Further, in FIG. 2, reference numeral 400 denotes a distribution facility design support system, which obtains an appropriate input from various measurement means 200 including the sensor 170 and gives the automatic voltage adjustment device 300 its operation setting value 350. Although FIG. 2 shows the distribution system 100 having a simple configuration, in practice the automatic voltage adjusting device 300 is appropriately provided at each location of a plurality of feeders, and the distribution facility design support system 400 includes the respective automatic voltage adjusting devices 300. , And the optimal operation setting value 350 at each installation site is determined and given.

  As exemplified in FIG. 2, the voltage adjustment system in the present invention has an overall configuration including an automatic voltage adjustment device 300 and a distribution facility design support system 400, but in the embodiment of the present invention, the automatic voltage adjustment device 300. The function itself of the distribution facility design support system 400 illustrated in FIG. 1 may be included in itself and integrated as a voltage regulator.

FIG. 1 shows the entire configuration of a distribution facility design support system according to the present invention. The distribution facility design support system 400 uses various measuring means 200 including the sensor 170 to perform the internal processing, the active component Ir _SVR and the reactive component Ii _SVR (or active power PSVR) of the passing current of the automatic voltage regulator _SVR. And reactive power Q _SVR ), the potential difference ΔV between the automatic voltage regulator SVR installation point and the solar power generation apparatus PV installation point, the amount of solar radiation, etc. are acquired.

  Generally, the distribution facility design support system 400 is configured as a computer system, but the function of the distribution facility design support system 400 can be expressed as a plan division section determination unit 440, upper rank ΔV extraction unit 460, multiple regression analysis unit 480, It is comprised by the solar radiation amount and the matching means 500 of setting value, database DB3, database DB4, database DB5 etc.

  Various data etc. which computed voltage DELTA Vlim which contributes to photovoltaic power generation output suppression from power flow calculation are stored in database DB3 from SVR passage current Irsvr, Iisvr and voltage difference DELTA V which were measured in the distribution system made into object. In addition to the measured values at each input time, the target power distribution system, the SVR arrangement, the arrangement / capacity of the solar power generation facility, the load pattern, and the like are appropriately given and stored in the database DB3 from the database DB4.

  In the database DB5, many SVR settling values R2 and X2 calculated based on the past results are stored in association with a time zone and information on the amount of solar radiation in that time zone.

  The databases DB3, DB4, and DB5 may be installed outside the distribution facility design support system 400 as long as they can be properly incorporated into the distribution facility design support system 400 via communication and the like. .

  Regarding the specific processing contents of the on-plane divided section determination means 440, the upper rank ΔV extraction means 460, the multiple regression analysis means 480, and the solar radiation amount and settling value correspondence means 500 which are main functions of the distribution facility design support system 400 The method will be described in detail with reference to the processing flows of FIGS. 7, 8, 9 and 17 separately, but it will be described briefly as follows.

First, the on-plane divided section determination unit 440 in FIG. 1 takes in the information of the database DB3 and divides the divided section (ΔIrsvr on the plane determined by the active component Ir _SVR and the invalid component Ii _SVR of the passing current of the automatic voltage regulator SVR. , ΔIisvr). The upper rank ΔV extraction means 460 extracts (Irsvr, Iisvr, ΔV _{upper rank} ) which is the _{upper rank} ΔV from arbitrary divided sections (Δirsvr, ΔIisvr). The multiple regression analysis unit 480 performs multiple regression analysis using the extracted (Irsvr, Iisvr, ΔV _{high rank} ) data set for each data acquisition time zone, and obtains the SVR settling value for each time zone. The correlating means for correlating the amount of solar radiation and the settling value 500 stores the SVR settling value for each time zone determined by the multiple regression analysis means 480 and the amount of solar radiation for each time zone measured by the eclipse meter 185 in the database DB5. Do. Thereafter, the SVR settling value corresponding to the amount of solar radiation is output to the outside, and the SVR settling value 350 is set for the automatic voltage regulator 300.

  On the other hand, the control part of the automatic voltage regulator 300 on the side receiving the SVR settling value 350 is a sensor 170 for measuring the electric quantity of the distribution line as shown in FIG. 2 and a tap controller 310 for controlling the tap of the transformer. It consists of An example of a specific circuit configuration of the transformer 305 and control portion of the automatic voltage regulator SVR according to the present invention is shown in FIG.

  The concept of tap control will first be described using FIG. 3, and then the relationship between the SVR settling value 350 provided by the distribution facility design support system 400 and the line voltage drop compensation circuit LDC will be described. In FIG. 3, an auto transformer 303 which is a main circuit of the automatic voltage regulator 300, a tap changer 302, and a tap control device 310 which is a control device are described.

  The tap control device 310 includes a measurement unit 320, line voltage drop compensation circuits LDC1 and LDC2, a tap control unit 340, databases DB1 and DB2, a settling value selection unit 345, and the secondary voltage of the autotransformer 303 is set to a predetermined value. The tap changer 302 is operated to control. The settling value selection unit 345 will be described later with reference to FIG. Here, the database DB 2 holds the SVR set value 350 provided by the distribution facility design support system 400.

  Various operation setting values for executing tap control are stored in the databases DB1 and DB2. These include parameters (voltage Vref, impedances R and X), dead zone Vε, timer time constant τ, operation time constant T and the like in performing line voltage drop compensation calculation (LDC calculation). The SVR set value 350 provided by the distribution facility design support system 400 to the database DB2 may include all of these, but at least the impedances R and X are determined by the processing by the distribution facility design support system 400. is there.

  Here, the impedances R and X as the SVR settling value 350 stored and used in the database DB1 are R1 and X1, and these are set by the existing method, and in the present invention, the calculation method of R1 and X1 It does not matter. On the other hand, the impedances R and X as the SVR settling value 350 stored and used in the database DB2 are R2 and X2, and the SVR settling values R2 and X2 are SVR settling values given by the distribution facility design support system 400.

  The SVR settling values R1 and X1 are positive values. On the other hand, the SVR settling values R2 and X2 may be not only positive values but also negative values. The reason is that the voltage at the virtual point may drop depending on the relationship between the load devices in the distribution system and the arrangement of the solar power generation facilities even if the SVR passing current is reverse. As described above, by allowing negative values as the values of the SVR settling values R2 and X2, it is possible to obtain an effect that voltage adjustment can be performed more reliably.

  Connected to the measurement unit 320 of the tap control device 310 are a sensor CT that measures the secondary current Isvr of the distribution line, and a sensor PT that measures the secondary voltage Vsvr.

  The line voltage drop compensation circuit LDC (LDC1, LDC2) detects that the secondary voltage Vsvr measured by the measurement unit 320 deviates from a predetermined limit value, and this state continues for a predetermined measurement time or more. The switching control of the tap is executed via the tap control unit 340 when doing this.

  In the embodiment shown in FIG. 3, the line voltage drop compensation circuit LDC is provided with LDC1 and LDC2. Among them, the line voltage drop compensation circuit LDC1 is an existing device, and the line voltage drop compensation circuit LDC2 is newly added. Device. Although any line voltage drop compensation circuit LDC controls the voltage at a virtual point of the distribution system from the secondary side information of the automatic voltage regulator 300 to a predetermined range, the line voltage drop compensation circuit LDC1 is a solar power generator The line voltage drop compensation circuit LDC2 solves the problem in the solar power generation device PV while there is no countermeasure against the problem in the PV.

  Moreover, regarding the point provided with LDC1 and LDC2 as a line voltage drop compensation circuit LDC, the setting of the both may be comprised so that the problem in the solar power generation device PV might be addressed. When the voltage is limited within a predetermined range, it is possible to use the line voltage drop compensation circuits LDC1 and LDC2 to set the upper limit and the lower limit.

  Although the present invention does not necessarily require two line voltage drop compensation circuits LDC, when two line voltage drop compensation circuits LDC are provided, the line voltage drop compensation circuit LDC1 is an output of the solar power generation apparatus PV. The line voltage drop compensation circuit LDC2 can be said to be effective for tap control in fine weather, which is effective for tap control at night or cloudy weather.

  FIG. 4 shows a flow of calculation of the tap switching command 303 by the tap control unit 340. According to the flowchart of FIG. 4, in the first processing step S1, the active power Psvr and the reactive power Qsvr are calculated from the secondary current Isvr and the secondary voltage Vsvr measured by the measuring unit 320. This process may be calculated by, for example, the line voltage drop compensation circuit LDC1 of the two line voltage drop compensation circuits LDC. Alternatively, the active power Psvr and the reactive power Qsvr may be directly measured. Also, instead of the active power Psvr and the reactive power Qsvr, the active component Irsvr and the reactive component Iisvr of the passing current of the automatic voltage regulator SVR may be obtained. In the following example, an example using the active ingredient Irsvr and the ineffective ingredient Iisvr will be described.

In the next processing step S2, the line voltage drop compensation circuit LDC1 reads the parameters (R1 and X1 as impedances and the voltage Vref1) shown in the database DB1 and executes the equation (1). By executing the equation (1) in the tap control device 310, the tap operation determination reference value Vs1 is calculated.
[Equation 1]
Vs1 = Vref1 + R1 · Irsvr + X1 · Iisvr (1)
Here, the impedance (R1, X1) and the voltage Vref1 are parameters set in advance and stored in the database DB1, and Irsvr and Iisvr are the real part of the passing current obtained from the measured passing current Isvr and the power factor cosθ. , Is the imaginary part of the passing current. Further, R1 is a coefficient of the passing current of the automatic voltage regulator SVR with respect to the real part Irsvr, X1 is a coefficient of the passing current of the automatic voltage regulator SVR with respect to the imaginary part Iisvr, and Vref1 is a reference voltage.

  Note that the description of processing step S2 in FIG. 4 describes an example of a calculation formula for obtaining the term of R1 · Irsvr as the product of active power Psvr and coefficient AP1, and obtaining the term X1 · Iisvr as the product of reactive power Qsvr and coefficient Aq1. However, the same result is obtained regardless of which method is used.

Similarly, in the processing step S3, the line voltage drop compensation circuit LDC2 reads the parameters (R2 and X2 as impedances and the voltage Vref2) shown in the database DB2 and executes the equation (2). By executing the equation (2) in the tap control device 310, the tap operation determination reference value Vs2 is calculated.
[Equation 2]
Vs2 = Vref2 + R2 · Irsvr + X2 · Iisvr (2)
Here, R2, X2, Vref2 are preset parameters, and Irsvr and Iisvr are the real part of the passing current obtained from the measured passing current Isvr and the power factor cos θ, and the imaginary part of the passing current. Further, R2 is a coefficient of the passing current of the automatic voltage regulator SVR with respect to the real part Irsvr, X2 is a coefficient of the passing current of the automatic voltage regulator SVR with respect to the imaginary part Iisvr, and Vref2 is a reference voltage.

  Note that the description of processing step S3 in FIG. 4 describes an example of a calculation formula for obtaining the term of R2.Irsvr as the product of active power Psvr and coefficient AP2, and for obtaining the term X2.Iisvr as the product of reactive power Qsvr and coefficient Ap2. However, the same result is obtained regardless of which method is used.

  In processing step S4, it is confirmed that the secondary side voltage Vsvr of the automatic voltage regulator SVR exceeds the predetermined positive and negative limit value ε1 with respect to the reference value Vs1 determined by the equation (1), and within a predetermined range When there is (YES in the processing step S4), the process returns to the processing step S1 to repeat the above processing.

  When the secondary side voltage Vsvr of the automatic voltage regulator SVR exceeds the predetermined limit value ε1 which is positive or negative with respect to the reference value Vs1 (No in processing step S4), the time which satisfies the processing step S4 is satisfied in processing step S5 In the processing step S6, when the value exceeds Tsvr1, a tap switching command is issued, and after tap switching, Tsvr1 is reset in processing step S7.

  The above process for the result of equation (1) is similarly performed for the result of equation (2). This processing portion corresponds to the processing steps S8 to S11 of FIG.

  Specifically, in the processing step S8, it is confirmed that the secondary voltage Vsvr of the automatic voltage regulator SVR exceeds the predetermined positive / negative limit value ε2 with respect to the reference value Vs2 obtained by the equation (2). When it is within the predetermined range (YES in processing step S8), the process returns to processing step S1 to repeat the above processing.

  When the secondary side voltage Vsvr of the automatic voltage regulator SVR exceeds the predetermined limit value ε2 which is positive or negative with respect to the reference value Vs2 (No in processing step S8), the time in the processing step S9 satisfies the condition of the processing step S8 In the processing step S10, when the value exceeds Tsvr2, a tap switching command is issued, and after tap switching, Tsvr2 is reset in processing step S11.

  According to the above-mentioned processing judgment, when the secondary voltage Vsvr of the automatic voltage regulator SVR is smaller than the reference value Vs1 by the fixed value ε1 or more, the constant voltage (for example, Tsvr1 second) elapses. The tap 302 is turned upward to raise the secondary voltage. Conversely, when the secondary voltage Vsvr of the automatic voltage regulator SVR is larger than the reference value Vs1 by a fixed value ε1 or more and a fixed time elapses, the tap 302 of the automatic voltage regulator SVR is changed to the downward direction, and the secondary side It operates to lower the voltage.

  Similarly, when the secondary voltage Vsvr of the automatic voltage regulator SVR is smaller than the reference value Vs2 by a fixed value ε2 or more, the tap 302 of the automatic voltage regulator SVR is raised when a predetermined time (for example, Tsvr2 seconds) elapses. Change the direction and raise the secondary voltage. Conversely, when the secondary voltage Vsvr of the automatic voltage regulator SVR is larger than the reference value Vs2 by a fixed value ε2 or more and a fixed time elapses, the tap 302 of the automatic voltage regulator SVR is changed to the downward direction, and the secondary side It operates to lower the voltage.

  FIG. 5 shows the relationship between the distribution facility design support system 400 and the various measurement means 200. The active component Irsvr and the reactive component Iisvr of the passing current of the automatic voltage regulator SVR are measured by the measuring unit 320 (see FIG. 3) in the automatic voltage regulator SVR, and from the slave station 190, the dedicated line 191, distribution automation The distribution facility design support system 400 is acquired via the system 600. In addition, regarding the terminal voltage of the solar power generation device PV, the voltage from the voltmeter 180 is acquired from the slave station 190 to the distribution facility design support system 400 via the dedicated line 191 and the distribution automation system 600. The amount of solar radiation is also acquired by the distribution facility design support system 400 from the slave station 190 via the dedicated line 191 and the distribution automation system 600 in the pyranometer 185 installed near the distribution system. If the solar radiation meter 185 is not installed, the solar radiation amount of the area concerned is obtained from the solar radiation amount measurement data from the Meteorological Agency. A settling value 350 is transmitted from the distribution facility design support system 400 to the automatic voltage regulator SVR via the distribution automation system 600, the dedicated line 191, and the slave station 190.

  FIG. 6 shows a configuration example in the case where the facility design support system 400 is configured by a computer. The facility design support system 400 includes a display device 11 for displaying calculation results obtained as a result of various means, an input means 12 for receiving an input from the system user, a CPU 13 for executing various means, a communication means 14, RAM 15 for holding the calculation process, data group constituting the power distribution system (target power distribution system, measured value of solar radiation, PV arrangement / capacity, load pattern, SVR arrangement), measured SVR passing current Irsvr, Iisvr And DB3 which stores data which calculated voltage ΔVlim which contributes to photovoltaic power generation output control by power flow from difference voltage ΔV, etc. DB1, DB2 which stores LDC parameter, target distribution system, SVR arrangement, solar power generation facility Database DB4 where the layout, capacity, load pattern etc. of A large number of SVR settling values R2 and X2 calculated based on the time zone and the database DB5 stored together with the information of the amount of solar radiation in the time zone.

  Next, specific processing contents in the facility design support system 400 will be described in order. First, the processing contents of the on-plane divided section determination unit 440 will be described with reference to FIG.

  In FIG. 7 showing a flow for determining divided sections (ΔIrsvr, ΔIisvr) on the (Irsvr, Iisvr) plane, in the first processing step S 441, power factors cos θ, sin θ are obtained from the measured values P, Q, or SVR passage effective Directly measure the current Irsvr and the reactive current Iisvr. In the next processing step S442, the SVR passing currents Irsvr and Iisvr are calculated from the average value of the measured current. Alternatively, SVR passage current Irsvr, Iisvr is obtained. In addition, the potential difference ΔVi (i = 1, 2,... N) between the SVR and the plurality of photovoltaic power generation output points is also obtained by this stage, and the SVR passing current Irsvr, Iisvr and SVR, and the plurality of photovoltaic power generation outputs The point-to-point potential difference ΔVi is obtained by being correlated with each other along with the information of measurement time.

  Further, in processing step S443, based on the distribution of data of Irsvr and Iisvr, a coordinate plane constituted by Irsvr and Iisvr is assumed, and this plane is segmented. When the maximum value and the minimum value of Irsvr and Iisvr are about ± 100 A, the plane of Irsvr and Iisvr is divided into 20 × 20 by setting ΔIrsvr = ΔIisvr = 10 A as a unit of segmentation. As a result, it becomes possible to perform multiple regression analysis stably, which is the processing of the latter stage. The unit of this segmentation can be set by the user of the system.

  In the on-plane divided section determination means 440 of FIG. 7, as described above, assuming a two-dimensional coordinate plane constituted by Irsvr and Iisvr, and dividing the two-dimensional coordinate plane into a plurality of sections to divide the plane I do.

  Next, processing contents of the upper rank ΔV extraction means 460 will be described with reference to FIG.

  In FIG. 8 showing the processing flow of the upper rank ΔV extraction means 460, in processing step S461, a three-dimensional space is assumed with SVR passing currents Irsvr, Iisvr, and a potential difference ΔV between SVR and a plurality of photovoltaic power generation output points. Specifically, in the three-dimensional coordinates (Irsvr, Iisvr, ΔV) belonging to each divided section (ΔIrsvr, ΔIisvr) divided by the SVR passage current Irsvr, Iisvr, sorting is performed in the descending order of the value of ΔV. In processing step S462, among the (Irsvr, Iisvr, ΔV) data sets sorted in descending order of the value of ΔV, data in which the value of ΔV is the first, second, or third place is selected. The user of this system can set up how many places should be selected.

  FIG. 13 is a diagram showing the concept of a three-dimensional space by Irsvr, Iisvr, and ΔV. In FIG. 13, the division of the plane area in units of ΔIrsvr and ΔIisvr is performed on the plane coordinates by the SVR passing current Irsvr and Iisvr, and the potential difference ΔV between the SVR and the plurality of photovoltaic power generation output points in the height direction Is assumed to be a three-dimensional space adopted. Although the potential difference ΔV in the divided plane is indicated by ま た は or ●, the upper rank one with a large potential difference ΔV is indicated by ● here.

  In FIG. 8, the selection flag is added to the data set of (Irsvr, Iisvr, ΔV) in which the value of the potential difference ΔV is in the top one, two, and three places. This setting of the selection flag makes it possible to discriminate data when performing multiple regression analysis, and the processing of the multiple regression analysis means 480 shown in FIG. 9 is started.

  The process of the multiple regression analysis means 480 is shown in FIG. First, in processing step S900, a unit time for performing multiple regression analysis is set. For example, one hour or three hours. In the processing step S 907, for example, calculation for all time zones in 1 hour or 3 hour intervals for one daytime day is ended. The subsequent processing is performed on the data set included in the unit time. In the processing step S901, the combination of the solar power generation devices PVi is searched, and in the processing step S902, the combination of the solar power generation devices PVi in which the selection flag is 1 is extracted. After finding the combination of the solar power generation apparatus PVi with selection flag = 1, in step S903, multiple regression analysis calculation is performed between the potential difference ΔV and the SVR passing current Irsvr, Iisvr at that time, ΔV = α × Let α which is Irsvr + β × Iisvr + ΔV0 be the settling value R (Ω) of LDC 2 of SVR.

  Further, in processing step S904, multiple regression analysis is performed between the potential difference ΔV at this time and the SVR passing current Iisvr, and β which becomes ΔV = α × Irsvr + β × Iisvr + ΔV0 is the settling value X of the LDC 2 of the automatic voltage regulator SVR (Ω And).

  In processing step S905, the SVR settling value is calculated from the intercept with the Z axis by multiple regression analysis calculation between the difference .DELTA.V between the SVR secondary voltage and the Pvi end voltage at which the selection flag == 1 and the SVR passing current Iisvr data. Calculate ΔV0.

  In processing step S906, if all data combination patterns have not been searched, processing returns to processing step S901. If all data combination patterns have been searched, this processing ends, and the SVR settling values R2 and X2 linked to the season / time zone are determined.

  By the above-described process performed for each set time slot, for example, the SVR settling values R2 and X2 obtained in the hourly time slot from 6 am to 6 am with sunshine are obtained. The SVR settling values R2 and X2 for each of these time zones are held in the database DB5 shown in FIG. 1 together with the information on the time, but at this time, the processing by the solar radiation amount and settling value correspondence means 500 The SVR settling value for each time zone determined by the multiple regression analysis means 480 is associated with the amount of solar radiation for each time zone measured by the solar radiation meter 185 and stored in the database DB5.

  The process of FIG. 9 defines the position in consideration of the photovoltaic power generation device PV which produces output suppression in defining the virtual point defined by the settling values R and X of the LDC 2 of the automatic voltage regulator SVR. If, for example, 100 solar power generation devices PV exist under the umbrella of the automatic voltage regulator SVR, and 50 of these are solar power generation devices PV that cause frequent or large-scale output suppression, all 100 In the present invention, the virtual point setting is performed mainly for the 50 solar power generation devices PV that generate output suppression, while the virtual point setting taking into account the above is conventionally performed.

  For this reason, several things can be assumed as an implementation | achievement method of virtual point setting mainly having the solar power generation device PV which produces output suppression, and this invention may be any of that. These deformation methods may be defined, for example, by limiting to a solar power generation device PV with a high degree of output suppression, or repeatedly determined to maximize the number of solar power generation devices PV that can be saved from output suppression, It is conceivable that the weighting factor of the photovoltaic power generation device PV that causes output suppression is increased to determine a virtual point.

  FIG. 10 shows geometrical images of α and β obtained in FIG. FIG. 10 shows a three-dimensional plane defined by an effective component Irsvr of the SVR passing current, an ineffective component Iisvr, and a potential difference ΔV between the SVR secondary voltage and the solar generator terminal voltage. Here, when the potential difference ΔV is ΔV0, a region represented by the voltage fluctuation ΔΔV when the active component Irsvr increases and the voltage fluctuation ΔΔV ‘when the ineffective component Ii increases is displayed.

From this relationship in FIG. 10, α and β can be expressed by equations (3) and (4). The coefficients α and β are none other than the determination of the SVR settling values R2 and X2 linked to the season / time zone.
[Equation 3]
α = ΔΔV / ΔIr (3)
[Equation 4]
β = ΔΔV ′ / ΔIi (4)
In the embodiment of FIG. 1, the automatic voltage regulator SVR and the distribution facility design support system 400 are separately arranged to perform signal transmission. However, FIG. 11 shows the SVR settling value determination means in the automatic voltage regulator SVR. Fig. 14 shows an embodiment with 400A. The SVR settling value determining unit 400A includes a database DB3A, a divided-on-planar section determining unit 440A, an upper rank ΔV extracting unit 460A, a multiple regression analysis unit 480A, a solar radiation amount and settling value correspondence unit 500A, a database DB4A, and a database DB5A. . The measuring means 200 acquires the SVR passing currents Irsvr and Iisvr, the potential difference ΔVi between the automatic voltage regulator SVR and the solar power generation device PVi output point, and the amount of solar radiation, and the on-plane divided section determining means 440A and the upper rank ΔV extracting means 460A After selecting data that has a correlation with solar power generation device output suppression, the SVR settling value for each time zone is determined by means of 480A that performs multiple regression analysis. In addition, the SVR settling value for each time zone is accumulated and stored in the database DB5A by the correlating means 500A for the amount of solar radiation and the settling value, together with the information on the amount of solar radiation. Thereafter, the SVR settling value 350 is shown to be set to the tap control 310.

  The concept of the process described in FIGS. 1 and 11 will be described with reference to FIGS. 12 a and 12 b. First, FIG. 12a shows an example of a planar area configuration of a distribution system which is arranged, for example, in a dendritic manner and extended from the substation 110 via an automatic voltage regulator SVR. In the distribution system which concerns, the solar power generation device PV is arrange | positioned in the position of "(circle)." Here, it is assumed that the position of the virtual point on the secondary side of the automatic voltage regulator SVR determined by the operation settling value R1, X1 of the line voltage drop compensation circuit LDC1, which is an existing device, is G1. The virtual point corresponds to the center of gravity of the impedance distribution in the planar area configuration of the distribution system. Therefore, if voltage control is performed on this point, voltage control of the entire distribution system is possible.

  On the other hand, FIG. 12 b has a correlation with the output suppression in the solar power generation device PV obtained by the on-plane divided section determination means 440A, the upper rank ΔV extraction means 460A, and the multiple regression analysis means 480A in FIGS. Only the solar power generation device PV is shown by "●". In the multiple regression analysis means 480, the output suppression is particularly large in consideration of the layout information of the photovoltaic power generation device PV having a correlation to the extracted output suppression, and the potential difference between the SVR secondary side voltage and the solar power generation device PVi terminal voltage The center-of-gravity position G2 of the impedance distribution in the planar area configuration of the distribution system is obtained for the photovoltaic power generation system PVi having a large correlation with ΔVi.

  FIG. 14 is a diagram showing a plane obtained by the multiple regression analysis means 480A using the data group of ● extracted by the on-plane divided section determination means 440A and the high rank ΔV extraction means 460A. This plane is a plane determined from a set of .circle .. As a result of determining the coefficients .alpha. And .beta. Shown in FIG. 10 from this plane, the output suppression is particularly large, and the potential difference between the SVR secondary voltage and the PVi terminal voltage The automatic voltage regulator SVR can be configured in consideration of the solar power generation device PVi having a large correlation with ΔVi.

  FIG. 15 shows the relationship between the estimation accuracy of the potential difference ΔV in the cases of FIGS. 12a and 12b. In the upper part of FIG. 15, the temporal change of the potential difference (thin solid line) in the conventional method (multiple regression analysis with all data) of FIG. 12a and the temporal change (thick solid line) of the potential difference by estimation in the conventional method There is. If a thick solid line overlaps with a thin solid line, it means that the estimation of the potential difference has been correctly performed, indicating that the control by the automatic voltage regulator SVR is well performed, but in particular, regarding the maximum value It is obvious that the estimation of is not good.

  Here, since the maximum value is an area where there is a high possibility that the photovoltaic power generation output suppression is implemented, the thick solid line can accurately estimate the maximum value, although the vicinity of the maximum value of the thin solid line should be accurately estimated. It is a problem in the past that it is not. Regarding this point, according to the method according to the proposal of the present invention shown in the lower part of FIG. 15, the thick solid line can accurately estimate the vicinity of the maximum value of the thin solid line, and the solar power generation output suppression may be implemented. It can be understood that the

  FIG. 17 shows the processing contents of the means 500 for correlating the amount of solar radiation and the settling value. In the processing of the correlating means 500 for the amount of solar radiation and the settling value, first, in process step S1701, the amount of solar radiation for each unit time in the corresponding area is acquired. The amount of solar radiation may be data published in meteorological related matters such as the Japan Meteorological Agency or NEDO. Next, in process step S1702, the settling value for each unit time calculated in the multiple regression analysis process 480 in the previous stage is acquired. Thereafter, in processing step S1703, a correlation between the amount of solar radiation and the settling value is generated for each unit time. As the processing of processing step S1703, a linear format is generated by a method of correlating the amount of solar radiation and settling value for each unit time and making it into a table, and multiple regression analysis based on a set of data of the amount of solar radiation and settling value for each unit time. There is also a way. The solar radiation amount and the settling value correlated for each unit time are accumulated in the database DB5.

  FIG. 16 shows the processing contents of the settling value selection unit 345 in the SVR. When the SVR receives the amount of solar radiation from the actinometer 185 in the processing step S1601 of FIG. 16, the SVR refers to the database DB5 to select a settling value corresponding to the amount of solar radiation. At processing step S1602, the selected settling value is transmitted to the LDC 2.

  In the process of FIG. 16, it is conceivable to refer to the database DB5 and handle the amount of solar radiation (hereinafter referred to as a reference amount of solar radiation) to be reflected in the setting of the LDC 2 as follows. First, the reference solar radiation amount may be grasped as, for example, an average solar radiation amount in a time zone of 1 hour. As a result, it is possible to avoid a situation where the SVR settling value is variably changed each time due to the instantaneous fluctuation of the amount of solar radiation, and the control is not stabilized.

  Also, the reference solar radiation amount may be a weather forecast as a reference. For example, many past results were obtained when the weather of tomorrow is cloudy (or clear) and the weather of the season is cloudy (or clear), and it turns out that the estimation reliability of tomorrow's weather forecast is high. When doing, it is possible to use the amount of solar radiation in the past as reference information of the amount of solar radiation of tomorrow as a reference amount of solar radiation when referring to the database DB5.

  The reference solar radiation amount may be a predicted solar radiation amount obtained by predicting the weather at a future time. When the current time is 10 o'clock from the movement of clouds in the neighboring area, weather forecast, etc., the weather of 11 o'clock one hour later is predicted, and the amount of solar radiation at that time is used as the reference amount of solar radiation when referring to database DB5. It can be used. The prediction time is not limited to one hour, and may be set arbitrarily.

  As the reference amount of solar radiation, not only the actual amount of solar radiation measured but also a value determined from the above viewpoint can be used. In the present invention, these are collectively referred to as a reference solar radiation amount.

  In FIG. 16, when referring to the database DB 5 using the reference solar radiation amount and taking out the settling value, there may be a case where there is not necessarily anything that matches the conditions properly. In this case, the selection under similar conditions is selected. Good to do. For this purpose, an appropriate learning process may be adopted.

  The operation setting values R2 and X2 of the line voltage drop compensation circuit LDC2 of the present invention indicate the center-of-gravity position G2. According to the present invention, the tap control in the automatic voltage regulator SVR is distributed such that the voltage in the vicinity does not deviate from the limit value by setting as a virtual point a position closer to the photovoltaic power generation device to be subjected to output suppression. Since the voltage of the system is adjusted, the solar power generation device, which has many opportunities for output suppression, is placed in a favorable environment without suppression.

  In the conventional case, although the output situation of the solar power generation device PV is not taken into account by controlling the center of gravity position G1 once determined, the present invention does not consider the solar power generation device PV having a correlation in descending order of output suppression. Since it extracts only and is made to reflect as the gravity center position G2 each time, it is possible to avoid the unfairness of the specific solar power generation device PV which has received the loss of the electric power selling opportunity by output suppression.

  As a result, even if the output of the solar power generation device PV is excessively increased, tap control in the upstream automatic voltage regulator SVR adjusts the voltage of the distribution system in advance, so that the solar power generation device PV It is possible to reduce the opportunity to reduce the output.

  By the above control according to the present invention, it is possible to reduce the output suppression amount of the solar power generation even in a system in which a large amount of solar power generation and the like are introduced into the branch system or the like. In addition, the voltage regulator can adjust the voltage of the grid only when the output suppression of the solar power generation occurs, so that the voltage regulation capability of the regular voltage regulator can be improved. There is an effect that it is possible to reduce the equipment cost for the increase in the amount of solar power generation.

  Further, according to the present invention, even within the same day of sunshine period, the state of the electric power system changes in accordance with the difference in sunshine conditions, so the settling value to be set is determined according to the amount of solar radiation. By making it variable, it is possible to contribute to finer power system control.

  Although the embodiments of the present invention described above are various, in any case, “the impedance of the distribution system in the predetermined time zone is determined based on the information obtained from the distribution system within the predetermined time zone Refer to the database according to the reference solar radiation amount and the database which stores the impedance and the solar radiation amount in the same predetermined time zone in association with each other and the impedance deriving means for the time zone, the solar radiation amount obtaining means for obtaining the solar radiation amount in the predetermined time zone The impedance extraction means for obtaining the impedance at the time of the reference solar radiation amount, and adjusting the tap so as to set the voltage at the virtual point of the distribution system as a set voltage, using the extracted impedance as a settling value.

  Here, the time zone-specific impedance deriving means is a portion mainly including the on-plane divided section determining means 440, the upper rank ΔV extracting means 460, and the multiple regression analysis means 480 in FIG. 1, and the database is a database DB 5 such as that shown in FIG. 1 or the like, and the impedance extraction means is the settling value selection unit 345 shown in FIG. The processing parts in the 16 flows correspond to one another.

  It can be used as a voltage regulator that regulates the voltage of the distribution system. Moreover, it can utilize as a control system of automatic voltage regulator SVR which is a voltage regulator, and the distribution substation LRT. In addition, in the distribution system, it can be used as a voltage maintenance measure and a distribution facility improvement measure improvement measure corresponding to the addition of distributed power sources such as solar power generation.

100: Power distribution system 110: Power distribution substation 120: Node PV: Photovoltaic power generation device 140: Power distribution line 150: Load 170: Sensor 300: Automatic voltage regulator 302: Tap changer 303: Autotransformer 305: Transformer 310 : Tap control device CT: Current sensor PT: Voltage sensor 320: Measurement unit LDC1, LDC2 of control device: Line voltage drop compensation circuit 340: Tap control devices DB1, DB2, DB3, DB4, DB5: Database

Claims (15)

A voltage regulator for a distribution system including a tapped transformer which is installed in a distribution system including a plurality of solar power generation devices and adjusts a tap to set a voltage at a virtual point of the distribution system as a set voltage,
Time-domain-specific impedance deriving means for determining an impedance which is a settling value of a voltage regulator, which is uniquely determined for the distribution system in the predetermined time zone based on information obtained from the distribution system within the predetermined time zone; The solar radiation amount obtaining means for obtaining the solar radiation amount in the time zone, the database storing the impedance and the solar radiation amount in the same predetermined time zone in association with each other, and the reference solar radiation amount with reference to the database according to the reference solar radiation amount A voltage regulator for a distribution system comprising: impedance extraction means for obtaining an impedance; and tap adjustment means for adjusting a tap to set a voltage at a virtual point of the distribution system as a set voltage using the extracted impedance as a settling value. . The voltage regulator of the distribution system according to claim 1, wherein
The information obtained from the distribution system is the active component and the reactive component of the passing current of the tapped transformer, and the potential difference between the tapped transformer and the plurality of photovoltaic devices.
The time-zone-based impedance deriving means is a plane on which the division section is determined on the plane determined by the active component and the ineffective component of the passing current of the tapped transformer, and the potential difference in the division section. An upper rank potential difference extracting means which ranks the potential differences in descending order and extracts a plurality of higher potential differences, and a multiple regression analysis of performing the multiple regression analysis using the extracted potential differences to determine the impedance of the tapped transformer A voltage regulator for a distribution system, comprising: means. The voltage regulator of a distribution system according to claim 2, wherein
The voltage regulator obtains information from the measuring means about the amount of solar radiation, the passing current of the transformer with a tap, the potential difference between the transformer with a tap and the installation point of the solar power generation apparatus, and from the measuring means It has storage means including information, information on the configuration of the distribution system to be targeted, information on the layout / capacity of the photovoltaic power generation system, information on the load pattern, and information on the layout data of the tapped transformer. Power distribution system voltage regulator characterized in that. A voltage regulator for a distribution system according to claim 2 or claim 3, wherein
The voltage regulator of a distribution system, wherein the settling value representing the distance from the tapped transformer to the virtual point is an impedance or a coefficient related to the impedance. A voltage regulator for a distribution system according to any one of claims 2 to 4, wherein
At least two sets of line voltage drop compensation circuits, wherein the first line voltage drop compensation circuit adjusts taps of the tapped transformer to set a voltage at a first virtual point in the distribution system as a set voltage; The second line voltage drop compensation circuit adjusts the tap of the tapped transformer to set a voltage at a second virtual point in the distribution system as a set voltage using the settling value obtained by the impedance extracting means. A voltage regulator for a distribution system characterized by A voltage regulator for a distribution system according to any one of claims 1 to 5, wherein
The voltage adjustment device for a distribution system, wherein the reference solar radiation amount is any one of a measured solar radiation amount, a solar radiation amount determined based on past results, and a solar radiation amount determined based on weather prediction. It is applied to the distribution system provided with a plurality of solar power generation devices, and the voltage adjustment of the distribution system including the transformer with a tap which adjusts the tap to set the voltage at the virtual point of the distribution system as the set voltage A system,
The distribution facility design support system
Time-domain-specific impedance deriving means for determining an impedance which is a settling value of a voltage regulator, which is uniquely determined for the distribution system in the predetermined time zone based on information obtained from the distribution system within the predetermined time zone; The solar radiation amount obtaining means for obtaining the solar radiation amount in the time zone, and the database for storing the impedance and the solar radiation amount in the same predetermined time zone in association with each other,
The tapped transformer sets the voltage at a virtual point of the distribution system using impedance extraction means for obtaining the impedance at the reference solar radiation amount with reference to the database by the reference solar radiation amount, and using the extracted impedance as a settling value A voltage adjustment system for a distribution system, comprising tap adjustment means for adjusting a tap to be a voltage. A voltage regulation system for a distribution system according to claim 7, wherein
The distribution facility design support system obtains information from the passing current of the tapped transformer, the potential difference between the tapped transformer and the installation point of the solar power generation apparatus, and the measuring means for the amount of solar radiation, and performs the measurement Storage means including information from the means, information on the configuration of the target distribution system, information on the layout / capacity of the solar power generation apparatus, information on the load pattern, and information on the layout data of the tapped transformer The voltage regulation system of the distribution system characterized by having. A voltage adjustment method for a distribution system comprising a tapped transformer which is installed in a distribution system including a plurality of solar power generation devices and adjusts a tap so as to set a voltage at a virtual point of the distribution system as a set voltage.
Based on the information obtained from the distribution system within a predetermined time zone, the impedance, which is the settling value of the voltage regulator, determined uniquely to the distribution system in the predetermined time zone is determined, and the amount of solar radiation in the predetermined time zone is determined. The impedance and the amount of solar radiation in the same predetermined time zone are stored in association with each other, and the impedance and the amount of solar radiation stored in association are referenced to extract the impedance at the time of reference solar radiation and settle the extracted impedance. A method of adjusting a voltage of a distribution system, comprising using a value to adjust a tap to set a voltage at a virtual point of the distribution system as a set voltage. The present invention is applied to a distribution system including a plurality of solar power generation devices and a tapped transformer for adjusting a tap to set a voltage at a virtual point of the distribution system as a set voltage according to a given settling value. A distribution facility design support system for a distribution system that provides a settling value for estimating a voltage, comprising:
As information obtained from the distribution system within a predetermined time zone, based on the active component and the reactive component of the passing current of the tapped transformer, and the potential difference between the tapped transformer and the plurality of photovoltaic devices, Time-based impedance deriving means for determining impedance which is a settling value of the voltage regulator, which is uniquely determined for the distribution system in the predetermined time zone, and solar power generation output obtaining means for determining a photovoltaic power generation output in the predetermined time zone And a database for storing the impedance and the photovoltaic power generation output in the same predetermined time zone in association with each other, and the output means for giving the impedance extracted from the database to the tapped transformer. Power distribution facility design support system for grid. A distribution facility design support system for a distribution system according to claim 10, wherein
Information from the measuring means for obtaining information from the passing current of the tapped transformer, the potential difference between the tapped transformer and the installation point of the solar power generator, and the amount of solar radiation, and information from the measuring means, Storage means including information on the configuration of the distribution system, information on the arrangement / capacity of the solar power generation apparatus, information on the load pattern, and information on the arrangement data of the tapped transformer. Distribution facility design support system for distribution system. A voltage regulator for a distribution system according to any one of claims 1 to 6, wherein
A voltage regulator for a distribution system, wherein impedances used as settling values are positive and negative values. A voltage regulation system for a distribution system according to claim 7 or claim 8, comprising:
A voltage regulation system for a distribution system, wherein impedances used as settling values are positive and negative values. The voltage adjustment method for a distribution system according to claim 9,
A method of adjusting a voltage of a distribution system, wherein impedances used as settling values are positive and negative values. A distribution facility design support system for a distribution system according to claim 10 or 11, wherein
A distribution facility design support system for a distribution system, wherein impedances used as settling values are positive and negative values.

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