JP2007330067A - Voltage control method and system of distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voltage control method of a distribution system and a voltage control system of the distribution system by which complicated calculation is not required, and impedance information is not required based on constitution of the distribution system. <P>SOLUTION: When voltage measurement is repetitively made at a plurality of points on a distribution line 2 to supervise generation of a voltage deviated from a proper range, and deviation of the voltage is detected at least at one point, voltage control equipment 3 which is nearest to the measured point of a voltage measured value is operated, based on the voltage measured value at which deviation becomes maximum from the proper range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a voltage control method for a distribution system and a voltage control system for the distribution system. More specifically, the present invention relates to a voltage control method for a distribution system and a voltage control system for the distribution system suitable for centrally controlling voltage control devices provided in the distribution system.

  In the distribution system, voltage control devices for controlling the voltage of the distribution system such as a static reactive power compensator (SVC) and a voltage regulator (SVR) within an appropriate range are installed. In a power distribution system that has been put into practical use, voltage control devices are controlled based on local information at each interconnection point. In this case, when the voltage deviates from the appropriate range at a point away from the installation position of the voltage control device, there is a possibility that a sufficient effect for voltage control cannot be expected. Therefore, it has been proposed to monitor a plurality of points in the distribution system by using a distribution line sensor and to centrally control the voltage control device. In this method of centralized control of the voltage of the distribution system, the voltage and power flow at multiple points in the distribution system are measured, and the flow calculation is performed using the measured data to obtain the optimal control amount for the voltage control device. The voltage control device is operated based on the control amount. The measurement of the voltage and the power flow is repeated, and an optimum control amount is always obtained for the varying voltage.

Uemura, Matsuda, “Proposal of Operation Management Method for Demand Area Systems—Development of Optimal Control Quantity Determination Program”, Chubu Electric Research Institute Report T01059, April 2002

  However, in the above-described centralized control method, it is necessary to repeatedly perform a complicated calculation for control, and the calculation time until the control amount is determined becomes long. For this reason, it is difficult to perform voltage control in response to voltage fluctuations quickly. In addition, the calculation requires impedance information based on the configuration of the distribution line. For this reason, it is difficult to flexibly cope with a configuration change of the distribution system.

  An object of this invention is to provide the voltage control method and voltage control system of a distribution system which do not require a complicated calculation. Another object of the present invention is to provide a voltage control method and a voltage control system for an unnecessary distribution system that do not require impedance information based on the configuration of the distribution system.

  In order to achieve such an object, the voltage control method for a distribution system according to claim 1 is to repeatedly measure voltage at a plurality of points on the distribution line to monitor the generation of a voltage deviating from an appropriate range, and to at least prevent the voltage deviation. When detected at one place, the voltage control device at the position closest to the measurement point of the voltage measurement value is operated based on the voltage measurement value that maximizes the deviation from the appropriate range.

  Therefore, when the voltage value at any of the measurement points provided on the distribution line deviates from the appropriate range, voltage control of the distribution system using the voltage control device is started. That is, the voltage control device provided at the position closest to the measurement point where the voltage value deviating from the appropriate range (hereinafter referred to as the deviation voltage value) is measured is operated. At this time, when the deviation voltage value exceeds the upper limit value of the appropriate range, the voltage control device is operated to decrease the voltage, and when the deviation voltage value is lower than the lower limit value, the voltage control device is operated to increase the voltage. When the deviation voltage value is detected at a plurality of points at the same time, the voltage control described above is performed for the deviation voltage value having the largest deviation amount.

  Multiple or one voltage control device may be installed. If multiple voltage control devices are provided, know the positional relationship between the voltage measurement device and the voltage control device in advance, and select the voltage control device closest to the measurement point where the deviation voltage value was measured. Operate. In addition, when the number of installed voltage control devices is one, the voltage control device is a voltage control device provided at the closest position to all measurement points, and the measurement is performed by measuring the deviation voltage value. The voltage control device is operated regardless of the point.

  For example, a static reactive power compensator (SVC: Static Var Compensator) or a voltage regulator (SVR: Step Voltage Regulator) can be used as the voltage control device, and all the voltage control devices can be compensated for static reactive power compensation. Either one of the device and the voltage regulator may be used, or both may be used in combination.

  When all the deviation voltage values are within the proper range, that is, when the voltage deviation is eliminated, the operation of the voltage control device is stopped and the voltage control of the distribution system is finished.

  Moreover, the voltage control method of the distribution system according to claim 2 is provided with a plurality of voltage control devices, and the voltage measurement value is not deviated only by the operation of the voltage control device closest to the measurement point of the voltage measurement value. If not solved, another voltage control device at the next closest position is additionally operated, and another voltage control device is additionally operated in a sequence close to each other until the deviation of the voltage measurement value is resolved.

  Therefore, when the deviation voltage value cannot be eliminated by operating only one voltage control device, the second closest voltage control device is also operated. If the deviation voltage value cannot be eliminated by the operation of the two voltage control devices, the voltage control device closest to the third is operated. In this way, the voltage control devices are additionally operated one after another until the deviation voltage value is eliminated, and the output shortage of the voltage control device for the voltage deviation is compensated.

  In the voltage control method for the distribution system according to claim 3, a plurality of voltage control devices are provided, and the deviation of the voltage measurement value at another measurement point becomes the maximum before the deviation of the voltage measurement value is resolved. In this case, the voltage control device at the position closest to the other measurement point is additionally operated based on the voltage measurement value at another measurement point while maintaining the operation of the voltage control device in operation constant.

  Therefore, while the voltage control device closest to the measurement point is operated for the deviation voltage value at one measurement point, the voltage measurement value at which the deviation is maximum is measured at another measurement point. If it moves, operation of a voltage control apparatus will be performed for the deviation voltage value from which the deviation newly became the maximum, keeping operation of the voltage control apparatus in operation constant.

  According to a fourth aspect of the present invention, the distribution system voltage control method divides the distribution line into a plurality of sections, monitors deviation voltage values for each voltage measurement point and voltage control apparatus belonging to each section, and operates the voltage control apparatus. Is to do. Therefore, the above-described voltage control of the distribution system is performed independently for each section.

  The voltage control method for the distribution system according to claim 5 does not operate the voltage control device when a voltage measurement value exceeding the appropriate range and a voltage measurement value below the appropriate range are detected at the same time. When a voltage measurement value that exceeds the appropriate range and a voltage measurement value that falls below the appropriate range are detected at the same time, it is not appropriate to perform voltage control of the distribution system by operating the voltage control device. Therefore, an inappropriate operation of the voltage control device can be prevented.

  The voltage control method for the distribution system according to claim 6 inputs the voltage measurement values at all measurement points into one control device, and monitors the generation of a voltage deviating from the appropriate range by the control device. When the deviation of the voltage is detected, the voltage control device at the position closest to the measurement point of the voltage measurement value is operated based on the voltage measurement value at which the deviation from the appropriate range is maximized. Therefore, the voltage control of the distribution system can be centrally controlled by one control device.

  The voltage control system of the distribution system according to claim 7 is measured by a voltage control device connected to the distribution line, a plurality of distribution line sensors for measuring voltages at different points on the distribution line, and the distribution line sensor. A control device to which a voltage measurement value is input. The control device monitors the occurrence of a voltage that deviates from the appropriate range, and when the deviation of the voltage is detected at at least one location, the deviation from the appropriate range is the maximum. Based on the measured voltage value, the voltage control device at the position closest to the measurement point of the measured voltage value at which the deviation from the appropriate range is maximum is operated.

  Therefore, when the voltage measured by any one of the plurality of distribution line sensors provided on the distribution line deviates from the appropriate range, voltage control of the distribution system using the voltage control device is started. That is, when the control device detects a voltage value (deviation voltage value) that deviates from an appropriate range among the monitored voltage measurement values, the voltage provided at the position closest to the distribution line sensor that measured the deviation voltage value. Select and operate the control device. At this time, the control device operates the voltage control device to lower the voltage when the deviation voltage value exceeds the upper limit value of the appropriate range, and operates the voltage control device to increase the voltage when the deviation voltage value is lower than the lower limit value. To do. When a plurality of deviation voltage values are detected simultaneously, the control device performs the above-described voltage control for the deviation voltage value having the largest deviation amount.

  Multiple or one voltage control device may be installed. When multiple voltage control devices are provided, the control device grasps the positional relationship between the distribution line sensor and the voltage control device in advance, and operates the voltage control device closest to the distribution line sensor that measured the deviation voltage value. Let When the number of voltage control devices is one, the voltage control device is the closest voltage control device to all distribution line sensors, and the control device is a distribution line sensor that measures the deviation voltage value. Activates the voltage control device. As the voltage control device, for example, a static reactive power compensator (SVC), a voltage regulator (SVR), etc. can be used, and all the voltage control devices can be used as a static reactive power compensator and a voltage regulator. Either one may be used, or both may be used in combination.

  When the deviation voltage value falls within the appropriate range, the control device stops the operation of the voltage control device and ends the voltage control of the distribution system. Then, the control device continues to monitor the generation of the deviation voltage value.

  Moreover, the voltage control system of the power distribution system according to claim 8 is provided with a plurality of voltage control devices, and the control device has a voltage at a position closest to the measurement point of the voltage measurement value at which the deviation from the appropriate range is maximum. If the deviation of the voltage measurement value that maximizes the deviation from the appropriate range cannot be resolved by the operation of the control device alone, the voltage control device provided at the next closest position is additionally operated to deviate from the voltage measurement value. Another voltage control device is additionally operated in order close to each other until the problem is resolved.

  Therefore, if the deviation voltage value cannot be eliminated by operating only one voltage control device, the control device also operates the second closest voltage control device. If the deviation voltage value cannot be eliminated by the operation of the two voltage control devices, the voltage control device closest to the third is operated. In this way, the voltage control devices are additionally operated one after another until the deviation voltage value is eliminated, and the output shortage of the voltage control device for the voltage deviation is compensated.

  In addition, the voltage control system of the distribution system according to claim 9 is provided with a plurality of voltage control devices, and the control device is capable of providing another deviation before the deviation of the voltage measurement value at which the deviation from the appropriate range is maximized. When the amount of deviation of the voltage measurement value at the measurement point becomes the maximum, the operation of the voltage control device in operation remains constant, and is closest to the other measurement point based on the voltage measurement value at another measurement point The position voltage control device is additionally operated.

  Therefore, while the voltage control device closest to the measurement point is operated for the deviation voltage value at one measurement point, the voltage measurement value at which the deviation is maximum is measured at another measurement point. If it moves, a control apparatus will operate a voltage control apparatus for the deviation voltage value from which the deviation newly became the maximum, maintaining operation | movement of the voltage control apparatus in operation | movement constant.

  Further, in the voltage control system for the distribution system according to claim 10, the distribution line is divided into a plurality of sections, and the control device monitors the occurrence of a deviation voltage value for each voltage measurement point and voltage control device belonging to each section. And the operation of the voltage control device. Therefore, voltage control of the distribution system is performed independently for each section.

  Furthermore, the voltage control system of the distribution system according to claim 11 does not operate the voltage control device when the control device detects a voltage measurement value exceeding the appropriate range and a voltage measurement value below the appropriate range at the same time. is there.

  When a voltage measurement value that exceeds the appropriate range and a voltage measurement value that falls below the appropriate range are detected at the same time, it is not appropriate to perform voltage control of the distribution system by operating the voltage control device. Thus, when the operation of the voltage control device is inappropriate, the control device does not operate the voltage control device.

  In the voltage control method for the distribution system according to claim 1, when voltage generation deviating from an appropriate range is monitored by repeatedly measuring voltage at a plurality of points on the distribution line, and voltage deviation is detected at at least one place, Based on the voltage measurement value that maximizes the deviation from the range, the voltage control device closest to the measurement point of the voltage measurement value is operated, so that no complicated calculation is required for the operation of the voltage control device. High-speed control is possible compared to the centralized control method. Further, since the voltage control device can be operated without using impedance information based on the configuration of the distribution system, it is possible to flexibly cope with a change in the configuration of the distribution system due to system switching or the like.

  Further, in the voltage control method for the distribution system according to claim 2, a plurality of voltage control devices are provided, and the deviation of the voltage measurement value may be caused only by the operation of the voltage control device closest to the measurement point of the voltage measurement value. If this is not the case, another voltage control device at the next closest position is additionally operated, and another voltage control device is additionally operated in the next order until the deviation of the voltage measurement value is resolved. It is also possible to deal with a case where the amount of deviation from the appropriate range of values is large.

  Further, in the voltage control method of the distribution system according to claim 3, a plurality of voltage control devices are provided, and the deviation of the voltage measurement value at another measurement point becomes maximum before the deviation of the voltage measurement value is resolved. In this case, the voltage control device at the position closest to the other measurement point is additionally operated based on the voltage measurement value at another measurement point while maintaining the operation of the voltage control device in operation constant. It is possible to flexibly cope with fluctuations in voltage.

  In the voltage control method for the distribution system according to claim 4, the distribution line is divided into a plurality of sections, the generation of the deviation voltage value is monitored for each voltage measurement point and voltage control apparatus belonging to each section, and the operation of the voltage control apparatus is performed. Therefore, when a plurality of voltage control devices are installed in the distribution system, each voltage control device can be appropriately operated.

  In addition, in the voltage control method for the distribution system according to claim 5, when a voltage measurement value exceeding the appropriate range and a voltage measurement value below the appropriate range are detected simultaneously, the voltage control device is not operated. The operation of the voltage control device can be prevented.

  Further, in the voltage control method of the distribution system according to claim 6, voltage measurement values at all measurement points are input to one control device, and the occurrence of a voltage deviating from an appropriate range is monitored by the control device, When a voltage deviation is detected, the voltage control device at the position closest to the measurement point of the voltage measurement value is operated based on the voltage measurement value at which the deviation from the appropriate range is maximized. Centralized control can be performed by a stand control device.

  Moreover, in the voltage control system of the distribution system of Claim 7, it measured by the voltage control apparatus connected to the distribution line, the several distribution line sensor which measures the voltage of the different point on a distribution line, and the distribution line sensor. And a control device to which a voltage measurement value is input. When the control device monitors the generation of a voltage that deviates from the appropriate range and detects a deviation of the voltage in at least one place, the deviation from the appropriate range is maximum. Based on the measured voltage value, the voltage control device at the position closest to the measurement point of the voltage measurement value where the deviation from the appropriate range is maximum is operated, so that complicated calculation is unnecessary for the operation of the voltage control device. High-speed control is possible compared to the centralized control method. Further, since the voltage control device can be operated without using impedance information based on the configuration of the distribution system, it is possible to flexibly cope with a change in the configuration of the distribution system due to system switching or the like.

  Further, in the voltage control system of the distribution system according to claim 8, a plurality of voltage control devices are provided, and the control device is configured to provide a voltage at a position closest to the measurement point of the voltage measurement value at which the deviation from the appropriate range is maximum. If the deviation of the voltage measurement value that maximizes the deviation from the appropriate range cannot be resolved by the operation of the control device alone, the voltage control device provided at the next closest position is additionally operated to deviate from the voltage measurement value. Since another voltage control device is additionally operated in a sequence close to each other until the error is resolved, it is possible to cope with a case where the deviation amount from the appropriate range of the deviation voltage value is large.

  Further, in the voltage control system of the power distribution system according to claim 9, a plurality of voltage control devices are provided, and the control device can change the voltage measurement value before the deviation from the appropriate range is maximized. When the amount of deviation of the voltage measurement value at the measurement point becomes the maximum, the operation of the voltage control device in operation remains constant, and is closest to the other measurement point based on the voltage measurement value at another measurement point Since the position voltage control device is additionally operated, it is possible to flexibly cope with fluctuations in the voltage of the distribution system.

  Further, in the voltage control system of the distribution system according to claim 10, the distribution line is divided into a plurality of sections, and the control device monitors the generation of the deviation voltage value for each voltage measurement point and voltage control device belonging to each section. Therefore, when a plurality of voltage control devices are installed in the distribution system, the operation of each voltage control device can be determined appropriately.

  Furthermore, in the voltage control system of the distribution system according to claim 11, when the control device detects a voltage measurement value exceeding the appropriate range and a voltage measurement value below the appropriate range, the voltage control device is not operated. Inappropriate operation of the voltage control device can be prevented.

  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

  FIG. 1 shows an example of an embodiment of a voltage control method (hereinafter simply referred to as voltage control method) of the distribution system of the present invention, and FIG. 2 shows a voltage control system (hereinafter simply referred to as voltage control system) of the distribution system of the present invention. An example of an embodiment is shown, respectively. This voltage control method repeats voltage measurement at a plurality of points on the distribution line 2 to monitor the occurrence of a voltage that deviates from the appropriate range, and when the voltage deviation is detected at at least one location, the deviation from the appropriate range is detected. Based on the maximum voltage measurement value, the voltage control device 3 at the position closest to the measurement point of the voltage measurement value is operated. The voltage control system 1 includes a voltage control device 3 connected to the distribution line 2, a plurality of distribution line sensors 4 that measure voltages at different points on the distribution line 2, and voltages measured by the distribution line sensor 4. And a control device 5 to which a measured value is input. The control device 5 monitors the generation of a voltage that deviates from the appropriate range, and when the deviation of the voltage is detected in at least one place, the deviation from the appropriate range is maximum. Based on the measured voltage value, the voltage control device 3 at the position closest to the measurement point of the measured voltage value at which the deviation from the appropriate range is maximum is operated.

  First, a case where only one voltage control device 3 is provided will be described. In this case, the voltage control device 3 is a voltage control device provided at a position closest to all the distribution line sensors 4, and a voltage value (deviation voltage value) deviating from an appropriate range in the voltage measurement value. The voltage control device 3 is actuated regardless of the distribution line sensor 4 that has measured.

  The voltage control device 3 is, for example, a static reactive power compensator (SVC). However, it is not restricted to SVC, For example, a voltage regulator (SVR) etc. can also be used. The SVC 3 as the voltage control device is operated by the control device 5 to increase or decrease the voltage of the distribution line 2 by increasing or decreasing the reactive power injected into the distribution line 2.

  The distribution line sensor 4 is a sensor that measures the voltage of the distribution line 2, and may be a sensor installed alone or a sensor installed on the distribution line 2 by being incorporated in another device. In the present embodiment, the distribution line sensor 4 measures the voltage on the high voltage (6600 V) side of the pole transformer, for example. The distribution line sensor 4 transmits the measured voltage value (hereinafter referred to as a voltage measurement value) to the control device 5. In FIG. 2, the distribution line sensors 4 are installed at, for example, four places on the distribution line 2 of the distribution system, but the number of installed distribution sensors is not limited to four.

  An appropriate voltage range is, for example, a standard voltage. In this embodiment, in order to evaluate the voltage of all the measurement points simultaneously, low voltage (100V) conversion is performed from the measured value (high voltage: 6600V) of the distribution line sensor 4, and the standard voltage is, for example, 100V, that is, 101 ± 6V. It is. That is, the control device 5 determines the voltage measurement value that maximizes the deviation from the appropriate range by comparing the voltage measurement values converted into the low voltage. However, the appropriate range is not necessarily limited to the standard voltage of 100V, and other standard voltages may be used. Further, a voltage in a range other than the standard voltage may be used.

  A distributed power source 6 and a load 7 are connected to the distribution line 2.

  The control device 5 is configured by a computer, for example. For example, as shown in FIG. 3, the control device 5 includes a monitoring unit 5 a that monitors the generation of a voltage that deviates from an appropriate range, and a device determination unit that determines an SVC 3 to be operated when a voltage deviation is detected at at least one location. 5b, a control amount determining means 5c for determining the control amount Q of the SVC 3 to be activated when a deviation in voltage is detected at at least one location, and a transmitting means 5d for transmitting the control amount Q to the determined SVC 3 Have. The computer constituting the control device 5 has a control procedure for monitoring the voltage measurement value of the distribution line sensor 4 and operating the SVC 3 to stabilize the voltage of the distribution system when a deviation from the voltage is detected at at least one location. A predetermined program or the like is installed, and the monitoring unit 5a, device determination unit 5b, control amount determination unit 5c, and transmission unit 5d are cooperated with the program and hardware resources such as an arithmetic device, a storage device, and an input / output device. Is realized.

  The SVC 3 has a self-excited or separately-excited converter, and is a device that controls reactive power flowing through the connected distribution line 2. The SVC 3 having a separately-excited converter performs switching and phase control of the converter according to the received control amount Q to increase / decrease the amount of reactive power held therein and perform voltage control. That is, the SVC 3 is operated by the operation of the control device 5 to perform the control operation. Further, the SVC 3 of the type having a self-excited converter performs voltage control by actively generating reactive power by inverter control corresponding to the received control amount Q. That is, the SVC 3 is operated by the operation of the control device 5 to perform the control operation.

  The control device 5 performs voltage control of the distribution system 8 as follows, for example.

  The monitoring means 5a of the control device 5 collects and monitors the voltage measurement values supplied from the distribution line sensor 4 installed at each point (step S21), and monitors the generation of a voltage that deviates from the appropriate range (step S21). S22). In this embodiment, since the distribution line sensor 4 is installed on the high-voltage side of the pole transformer, the monitoring means 5a uses the measured value of each distribution line sensor 4 based on the transformation ratio of the corresponding pole transformer. (100V) conversion is performed, and the converted value is used as a voltage measurement value.

  If there is no voltage deviation, the monitoring unit 5a executes step S23 and determines whether or not the control amount is zero. Since the control amount is 0 immediately after the execution of the program is started, the process proceeds to step S26. In step S26, the transmission means 5d transmits 0 as the control amount to the SVC 3. Now, the SVC 3 does not operate even when the control amount 0 is received. Then, returning to step S21, the voltage measurement values at each point are collected, and the occurrence voltage deviation monitoring is continued.

  On the other hand, when the deviation of the voltage is detected at at least one place, that is, when the monitoring means 5a detects that the voltage measurement value of the at least one distribution line sensor 4 has deviated from the appropriate range, the process proceeds from step S22 to step S25. . In step S25, the device determination unit 5b determines the SVC 3 to be operated, and the control amount determination unit 5c determines the control amount (control command value) Q of the SVC 3 to be operated. Here, only one voltage control device is installed, and the target of operation is the SVC 3. Further, the control amount determining means 5c determines the control amount Q based on the voltage measurement value deviating from the appropriate range. For example, the control amount Q is calculated by multiplying the deviation amount by a predetermined control gain. At this time, the control device 5 determines the control amount Q so as to decrease the voltage when the deviation voltage value exceeds the upper limit value of the appropriate range (upper limit control), and increases the voltage when it falls below the lower limit value. Then, the control amount Q is determined (lower limit control). In addition, since the voltage control apparatus installed is one, description about determination of SVC3 is abbreviate | omitted hereafter.

  FIG. 4 shows an example of a control block in the case of upper limit control. The control amount Q is calculated by taking the difference between the voltage measurement value V of the distribution line sensor 4 and the target voltage (the upper limit value of the appropriate range) Vref and multiplying this difference by a predetermined coefficient (control gain). However, the control block is not limited to that shown in FIG. The control block is appropriately determined according to the configuration of the power distribution system 8 and the like.

  After determining the SVC 3 to be operated and its control amount Q, the process proceeds to step S26. In step S26, the transmission means 5d transmits the control amount Q to the determined SVC3. The SVC 3 that has received the controlled variable Q operates and injects reactive power corresponding to the controlled variable Q into the distribution line 2. That is, the reactive power injection amount is increased or decreased according to the difference between the previous control amount Q and the current control amount Q. The voltage of the distribution line 2 is adjusted by the SVC 3 increasing or decreasing the injection amount of the reactive power.

  Thereafter, returning to step S21, the monitoring means 5a collects the voltage measurement values supplied from the distribution line sensor 4 installed at each point and determines the presence or absence of the deviation voltage value, in other words, the cancellation of the deviation voltage value (step). S22). If the voltage deviation has not been resolved immediately after the start of the operation of the SVC 3, the process proceeds to step S25 to recalculate the control amount Q, and then proceeds to step S26 to recalculate the control amount Q. Is transmitted, the process returns to step S21 and the above-described control is repeated. In this way, the control amount Q is sequentially updated, and the SVC 3 is operated based on the updated control amount Q. Therefore, the voltage control can be performed following the changing voltage well. In addition, the control amount Q is calculated based only on the voltage, and the control amount Q can be calculated quickly with a small amount of calculation. For this reason, since the execution time from step S21 to step S26 is extremely short and can be repeatedly executed in a short period, the voltage control can be performed by following the fluctuation of the voltage well from this point.

  When the voltage deviation is resolved, the process proceeds from step S22 to step S23 to determine whether or not the control amount Q is 0. If the control amount Q is 0, the process proceeds directly to step S26, where the control amount Q is 0. If not, step S24 is executed to reset the control amount Q to 0, and then the process proceeds to step S26. Now, immediately after the deviation of the voltage is eliminated by the operation of SVC3, the control amount Q is a value for operating the SVC3, and after proceeding from step S23 to step S24, the control amount Q is reset to 0. The process proceeds to step S26.

  In step S26, the transmission means 5d transmits 0 as the control amount Q to the SVC 3. The SVC 3 that has received the control amount 0 sets the injection amount of reactive power to 0. That is, the operation is stopped. Then, returning to step S21, the voltage measurement values at each point are collected, and the occurrence voltage deviation monitoring is continued.

  At the same time, voltage measurement values at a plurality of points may become deviation voltage values. In this case, in step S25 advanced from step S22, the control amount determination means 5c determines the control amount Q based on the voltage measurement value that maximizes the deviation amount. At this time, when the voltage measurement value that maximizes the deviation amount moves to another measurement point, the control amount Q is determined based on the voltage measurement value at another measurement point. Then, the SVC 3 is operated based on the newly determined control amount Q (step S26), and voltage control of the distribution system 8 is performed.

  The control device 5 repeats steps S21 to S26 to control the voltage of the distribution system 8. By repeatedly performing Step S21 to Step S26, voltage measurement at a plurality of points on the distribution line 2 is repeatedly performed in a short cycle, and voltage stabilization is always achieved. For example, voltage measurement is repeatedly performed at a cycle of about 2 seconds.

  In the present invention, since the control amount Q of the SVC 3 is calculated based on the voltage of the distribution system 8, no complicated calculation is required for calculating the control amount Q, and high-speed control is possible. For this reason, it is possible to perform voltage control by following the fluctuation of the voltage satisfactorily. Further, the control amount Q of the SVC 3 is determined without using the impedance information based on the configuration of the distribution system 8, that is, the type, number, size, connection position, and the like of the distributed power source 6 and the load 7 connected to the distribution line 2. Therefore, it is possible to flexibly cope with a change in the configuration of the power distribution system 8 due to system switching or the like.

  In addition, the voltage measurement values at all measurement points are input to one control device 5, and the generation of a voltage deviating from the appropriate range is monitored by the control device 5, and the SVC 3 is activated when a voltage deviation is detected. And the control amount Q is determined, and the SVC 3 is operated based on the determination, so that the voltage control of the distribution system can be centrally controlled by one control device.

  In addition, since the SVC 3 closest to the point where the deviation voltage value is measured is operated, the voltage of the deviating portion can be directly increased or decreased, and the voltage deviation can be solved efficiently.

  Next, a case where a plurality of SVCs 3 are provided in the power distribution system 8 will be described. When a plurality of SVCs 3 are provided, the control device 5 grasps in advance the positional relationship between the distribution line sensor 4 and the SVC 3, and operates the SVC 3 closest to the measurement point where the deviation voltage value is measured.

  FIG. 5 shows a voltage control system 1 provided with a plurality of SVCs 3. The same components as those shown in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, for example, two SVCs 3 are provided.

  The control device 5 stores a positional relationship between the distribution line sensor 4 and the SVC 3 in advance. For example, information in which the distribution line sensor 4 is associated with the SVC 3 closest to the distribution line sensor 4 (hereinafter referred to as positional relationship information) is stored in advance in the storage device of the control device 5. The device determination unit 5b determines the SVC 3 to be operated based on this positional relationship information.

  In the voltage control system 1 of FIG. 2, since there is one SVC 3 installed, the device determination means 5b always selects the same SVC 3 in step S25 of FIG. 1, but in the voltage control system 1 of FIG. The determination unit 5b selects the SVC 3 to be actuated based on the positional relationship information stored in the storage unit.

  The monitoring means 5a of the control device 5 collects and monitors the voltage measurement values supplied from the distribution line sensor 4 installed at each point, as in the voltage control system 1 of FIG. 2 (step S31), and the appropriate range. The generation of a voltage deviating from is monitored (step S32). If there is no voltage deviation, the process proceeds to step S33, where it is determined whether or not the control amount Q is zero. Now, immediately after the execution of the program is started and the control amount Q is reset to 0, the process proceeds to step S34.

  In step S34, it is determined whether or not there is SVC3 in which the operation output is kept constant, that is, SVC3 in which the control amount Q is kept constant (SVC 3 being held). Now, immediately after the execution of the program is started and there is no SVC 3 being held, the process proceeds to step S38 as it is. In step S38, the transmission means 5d transmits 0 as the control amount Q to the SVC 3. The SVC 3 does not operate even when the control amount 0 is received. Then, returning to step S31, the voltage measurement values at each point are collected, and the occurrence voltage deviation monitoring is continued.

  On the other hand, when the deviation of the voltage is detected at at least one place, that is, when the monitoring means 5a detects that the voltage measurement value of the at least one distribution line sensor 4 has deviated from the appropriate range, the process proceeds from step S32 to step S35. . In step S35, the device determination unit 5b determines the SVC 3 to be operated, and the control amount determination unit 5c determines the control amount Q of the SVC 3 to be operated. Now, there is one measurement point where the voltage measurement value is the deviation voltage value, and the voltage measurement value is the voltage measurement value at which the deviation amount from the appropriate range is maximized. The device determination means 5b refers to the positional relationship information, selects the SVC 3 arranged at the position closest to the deviation voltage value measurement point, and determines this SVC 3 as the operation target. Further, the control amount determining means 5c determines the control amount Q based on this deviation voltage value. The determination of the control amount Q is the same as in the case of FIG.

  After the SVC 3 to be operated and its control amount Q are determined, the process proceeds to step S38. In step S38, the transmission means 5d transmits the control amount Q to the determined SVC 3. The SVC 3 that has received the controlled variable Q operates and injects reactive power corresponding to the controlled variable Q into the distribution line 2. That is, the reactive power injection amount is increased or decreased according to the difference between the previous control amount Q and the current control amount Q. The voltage of the distribution line 2 is adjusted by the SVC 3 increasing or decreasing the injection amount of the reactive power.

  Thereafter, returning to step S31, the monitoring means 5a collects the voltage measurement values supplied from the distribution line sensor 4 installed at each point and determines the presence or absence of the deviation voltage value, in other words, the cancellation of the deviation voltage value (step). S32). If the voltage deviation has not been resolved immediately after the start of the operation of the SVC 3, the process proceeds to step S35 to re-determine the control amount Q, and then proceeds to step S38 to recalculate the control amount Q. Is transmitted, the process returns to step S31 and the above-described control is repeated. In this way, the control amount Q is sequentially updated, and the SVC 3 is operated based on the updated control amount Q. Therefore, the voltage control can be performed following the changing voltage well. In addition, the control amount Q is calculated based only on the voltage, and the control amount Q can be calculated quickly with a small amount of calculation. For this reason, since the execution time from step S31 to step S38 is extremely short and can be repeatedly executed in a short period of time, voltage control can be performed with good tracking of voltage fluctuations from this point.

  When the voltage deviation is resolved, the process proceeds from step S32 to step S33, where it is determined whether or not the control amount Q is 0. If the control amount Q is 0, the process proceeds directly to step S34 where the control amount Q is 0. Otherwise, step S37 is executed to reset the control amount Q to 0, and then the process proceeds to step S38. Now, immediately after the deviation of the voltage is eliminated by the operation of SVC3, the control amount Q is a value for operating the SVC3. After proceeding from step S33 to step S37 and resetting the control amount Q to 0, Proceed to step S38.

  In step S38, the transmission means 5d transmits 0 as the control amount Q to the SVC 3. The SVC 3 that has received the control amount 0 sets the injection amount of reactive power to 0. That is, the operation is stopped. Then, returning to step S31, the voltage measurement values at each point are collected, and the occurrence voltage deviation monitoring is continued.

  And when generation | occurrence | production of a deviation voltage value is not detected, it progresses to step S33 from step S32. Since the control amount Q has been reset to 0 by the previous execution of step S37, the process proceeds from step S33 to step S34, and the presence or absence of SVC 3 being held is determined. If there is no SVC 3 being held, the process proceeds directly to step S38. If there is SVC 3 being held, step S36 is executed to release the hold (release the maintenance of the controlled variable Q), and then go to step S38. move on. Since there is no SVC 3 currently being held, the process proceeds directly from step S34 to step S38. In step S38, 0 is transmitted to the SVC 3 as the control amount Q. This control amount Q is the same value as the previous time, and the SVC 3 remains stopped. Thereafter, the process returns to step S31, and the voltage measurement values at each point are collected, and the occurrence voltage deviation monitoring is continued.

  At the same time, voltage measurement values at a plurality of points may become deviation voltage values. In this case, in step S35 advanced from step S32, the device determination means 5b obtains a voltage measurement value that maximizes the deviation amount, and refers to the positional relationship information for the SVC 3 that is closest to the measurement point of the voltage measurement value. Select while. Further, the control amount determining means 5c determines the control amount Q based on the voltage measurement value that maximizes the deviation amount. At this time, if the measurement point of the voltage measurement value at which the deviation amount is maximum does not change, the control amount Q is calculated and the SVC 3 to be operated is determined based on the voltage measurement value at the same measurement point. When the voltage measurement value with the maximum amount moves to another measurement point, the control amount Q is calculated and the operation target SVC 3 is determined based on the voltage measurement value at another measurement point. Then, when the voltage measurement value that maximizes the deviation amount moves to another measurement point, when the SVC 3 to be operated changes to another SVC 3, the operation output of the SVC 3 before the change that has been operated until now Is kept constant. That is, the SVC 3 before the change becomes the SVC 3 being held, and in step S38, the transmission means 5d transmits the newly calculated control amount Q to the SVC 3 after the change, and the previous SVC 3 before the change. The control amount Q calculated by executing step S35 is transmitted as it is (holding of SVC3). This hold of SVC3 is continued until step S36 is executed.

  Thereafter, returning to step S31, the voltage measurement values at each point are collected, and step S31 → step S32 → step S35 → step S38 → step S31 are repeatedly executed until all deviation voltage values are eliminated. When all the deviation voltage values are eliminated, the process proceeds from step S32 to step S33. Now, immediately after the deviation voltage value is eliminated by the operation of SVC3 and the control amount Q is a value for operating SVC3, the process proceeds from step S33 to step S37, and after resetting the control amount Q to 0, step The process proceeds from S38 to step S31.

  If no deviation voltage value is generated, the process proceeds from step S32 to step S33. Since the control amount Q is now reset to 0, the process proceeds from step S32 to step S34. Now, since the SVC 3 that has been operated first is being held, the process proceeds to step S36, where the hold is released (the controlled variable Q held at a constant value is reset to 0). Thereafter, the process proceeds from step S38 to step S31, and the occurrence of the deviation voltage value is monitored.

  As described above, the control device 5 repeats steps S31 to S38 to control the voltage of the power distribution system 8. By repeatedly performing step S31 to step S38, voltage measurement at a plurality of points of the distribution line 2 is repeatedly performed in a short cycle, and voltage stabilization is always achieved. For example, voltage measurement is repeatedly performed at a cycle of about 2 seconds.

  Also in this embodiment, since the control amount Q of the SVC 3 is calculated based on the voltage of the distribution system 8 as in the above-described embodiment, complicated calculation is not necessary for calculating the control amount Q, and high-speed control is possible. It becomes. For this reason, it is possible to perform voltage control by following the fluctuation of the voltage satisfactorily. Further, since the control amount Q of the SVC 3 can be determined without using impedance information based on the configuration of the distribution system 8, it is possible to flexibly cope with a configuration change of the distribution system 8 due to system switching or the like.

  In addition, the voltage measurement values at all measurement points are input to one control device 5, the generation of a voltage deviating from the appropriate range is monitored by the control device 5, and the SVC 3 is activated when a voltage deviation is detected. Since the control amount Q is determined and the control amount Q is transmitted to the determined SVC 3 to perform voltage control, the voltage control of the distribution system can be centrally controlled by a single control device.

  In addition, since the SVC 3 closest to the point where the deviation voltage value is measured is operated, the voltage of the deviating portion can be directly increased or decreased, and the voltage deviation can be solved efficiently.

  As described above, in the case where a plurality of SVCs 3 are provided, when the deviation of the voltage measurement value at another measurement point becomes the maximum before the deviation of the voltage measurement value is resolved, the control amount Q of the SVC 3 in operation. The control amount is determined based on the voltage measurement value at another measurement point while maintaining a constant value, and the SVC 3 at the position closest to the other measurement point is additionally operated based on the determined control amount. The voltage control method may be used, and the deviation amount of the voltage measurement value at another measurement point becomes the maximum before the control device 5 resolves the deviation of the voltage measurement value at which the deviation from the appropriate range becomes the maximum. The control amount is determined based on the voltage measurement value at another measurement point while keeping the control amount of the SVC 3 in operation constant, and the position closest to the other measurement point based on the determined control amount. Arrange for additional activation of SVC3 It may be a voltage control system 1 of the system 8.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, only the voltage controller at the position closest to the measurement point is operated for the voltage measurement value at which the deviation from the appropriate range is the maximum, but this is not necessarily limited to this configuration. Absent. For example, when a plurality of SVCs 3 are provided, if the deviation of the voltage measurement value is not resolved only by the operation of the SVC 3 at the position closest to the voltage measurement value measurement point, another SVC 3 at the next closest position is added. It may be a voltage control method of the distribution system 8 that is operated and another SVC 3 is additionally operated in a sequence close to each other until the deviation of the voltage measurement value is resolved, and the control device 5 has an appropriate range. If the deviation of the voltage measurement value at which the deviation from the appropriate range is the maximum is not solved only by the operation of the SVC 3 at the position closest to the measurement point of the voltage measurement value at which the deviation from The voltage control system 1 of the distribution system 8 is configured to additionally operate the provided SVC 3 and additionally operate another SVC 3 in a sequence close to each other until the deviation of the voltage measurement value is resolved. And it may be.

  As voltage control in this case, for example, in step S35 of FIG. 6, it is conceivable to hold the currently operated SVC3, select the SVC3 in the next closest position, and determine the control amount Q of the SVC3. . That is, the device determination unit 5b monitors the time during which the control amount Q determined by the control amount determination unit 5c continues to be the maximum value, and when that time reaches a predetermined time, the positional relationship information is referred to. Then, the SVC 3 at the next position next to the currently operated SVC 3 is additionally determined. Then, the control amount determination means 5c having received this additional determination calculates the control amount Q of the additionally determined SVC 3 based on the voltage measurement value that does not eliminate the voltage deviation. For example, since the difference (deviation amount) between the current voltage measurement value and the appropriate range is considered to be an insufficient control amount, the control amount Q of the SVC 3 that additionally operates a value obtained by multiplying the deviation amount by a predetermined control gain and To do.

  In the subsequent step S38, the transmission means 5d transmits the control amount Q which is the maximum value to the held SVC 3, and transmits the newly calculated control amount Q to the additionally determined SVC 3. Thus, if the deviation of the voltage measurement value at which the deviation from the appropriate range is the maximum cannot be eliminated only by the operation of the SVC 3 at the position closest to the measurement point of the voltage measurement value at which the deviation from the appropriate range is the maximum, The SVC 3 provided at the next closest position is additionally operated.

  If the deviation of the voltage measurement value is not resolved even by the operation of the two SVCs 3, another SVC 3 is additionally operated in order close to each other until the deviation is eliminated. That is, in step S35, the device determination means 5b refers to the positional relationship information and additionally determines the SVC 3 at the next closest position, and the control amount determination means 5c determines the control amount Q for the additionally determined SVC 3.

  Thereafter, the above-described procedure is repeated until the deviation voltage value is eliminated. Then, after the deviation voltage value is eliminated, the hold of SVC 3 is released by executing step S36.

  In this way, it is possible to cope with a case where the deviation amount from the appropriate range of the deviation voltage value is large.

  In addition, the distribution line 2 is divided into a plurality of sections 9, and the voltage control method for the distribution system 8 is configured to monitor the generation of deviation voltage values and operate the SVC 3 for each voltage measurement point and voltage control device belonging to each section 9. In addition, the distribution line 2 is divided into a plurality of sections 9, and the control device 5 monitors the generation of deviation voltage values and the SVC 3 for each voltage measurement point and voltage control device belonging to each section 9. The voltage control system 1 of the power distribution system 8 that is configured to operate may be used. The voltage control system 1 in this case is shown in FIGS. FIG. 7 shows an example in which one SVC 3 is provided for each section 9, and FIG. 8 shows an example in which a section 9 having one SVC 3 and a section 9 having a plurality of SVCs 3 are mixed. However, all the sections 9 may be the sections 9 provided with a plurality of SVCs 3. The control device 5 performs the above voltage control independently for each section 9 in parallel. Thereby, the voltage of the distribution line 2 whole can be stabilized.

  In this way, when a plurality of SVCs 3 to be operated are installed in the power distribution system 8, it is possible to determine an area to be shared in advance for each SVC 3, and each SVC 3 is in the shared area. Voltage control can be performed using the measurement value at the measurement point with the largest deviation.

  Further, when a voltage measurement value that exceeds the appropriate range and a voltage measurement value that falls below the appropriate range are detected at the same time, the voltage control method of the distribution system 8 may be such that the operation of the SVC 3 is not performed. 5 may be the voltage control system 1 of the distribution system 8 in which the operation of the SVC 3 is not performed when the voltage measurement value exceeding the appropriate range and the voltage measurement value below the simultaneous range are detected at the same time.

  In this case, for example, in step S22 of FIG. 1, the control unit 5a may return to step S21 when both the voltage measurement value exceeding the appropriate range and the voltage measurement value falling below the appropriate range are detected simultaneously. For example, in step S32 of FIG. 6, when the monitoring unit 5a detects both the voltage measurement value exceeding the appropriate range and the voltage measurement value falling below the appropriate range, the process may return to step S31.

  Moreover, although the voltage control apparatus 3 was SVC in the above-mentioned description, if it is an apparatus which can adjust the voltage of the distribution line 2, it will not necessarily be restricted to SVC. For example, SVR may be used, and other devices may be used. An example of an embodiment of the voltage control method of the distribution system 8 using SVR as the voltage control device 3 is shown in FIG. 9, and an example of an embodiment of the voltage control system 1 of the distribution system 8 is shown in FIG. 9 and 12 are examples in the case where only one SVR is provided, for example. However, a plurality of SVRs may be installed, the distribution line 2 may be divided into a plurality of sections 9, and one SVR may be installed for each section 9. The sections 9 to be installed may be mixed, and a plurality of SVRs may be installed for each section 9.

  The control device 5 in this case is shown in FIG. The control device 5 includes a monitoring unit 5a that monitors generation of a voltage that deviates from an appropriate range, and a device determination unit 5b that determines a voltage control device (SVR) 3 to be activated when a voltage deviation is detected at at least one location. And a transmission means 5e for transmitting a tap operation command to the SVR 3 when a voltage deviation is detected at at least one location. The computer constituting the control device 5 includes a control procedure for monitoring the voltage measurement value of the distribution line sensor 4 and operating the SVR 3 to stabilize the voltage of the distribution system 8 when a voltage deviation is detected at at least one location. The monitoring unit 5a, the device determination unit 5b, and the transmission unit 5e are realized by the cooperation of the program and hardware resources such as an arithmetic device, a storage device, and an input / output device. .

  Since the SVR as the voltage control device 3 can control only the secondary side voltage (the end direction of the distribution line 2 as viewed from the SVR), the control device 5 measures the voltage measurement value that maximizes the deviation from the appropriate range. Only when the point is within the controllable range of the SVR 3, the voltage control is performed by operating the SVR 3. In FIG. 12, the controllable range is indicated by reference numeral 10. Two distribution line sensors 4 provided on the secondary side of the SVR 3 are distribution line sensors installed in the controllable range 10, and are denoted by reference numeral 4B. In addition, one distribution line sensor 4 provided on the primary side of the SVR 3 is a distribution line sensor installed outside the controllable range 10, and is denoted by reference numeral 4A. The control device 5 stores information about whether or not each distribution line sensor 4 is within the controllable range 10 of the SVR 3 in advance in the storage device as positional relationship information. In addition, in the voltage control system 1 of the distribution system which has several SVR3, it has also the information about whether each distribution line sensor 4 is in the controllable range 10 for every SVR3.

  The SVR 3 has a tap-switching type transformer inside, and when a control command for raising or lowering the tap is received, the tap is switched to adjust the distribution line voltage on the secondary side of the SVR 3. That is, the operation of the control device 5 activates the SVR 3 to perform a control operation.

  The monitoring means 5a of the control device 5 collects and monitors the voltage measurement values supplied from the distribution line sensor 4 installed at each point (step S41), and monitors the generation of a voltage that deviates from the appropriate range (step S41). S42, S43, S44). If there is no deviation from the upper limit value or the lower limit value of the appropriate range, the process proceeds from step S42 to step S44 to step S41, and the occurrence voltage deviation monitoring is continued.

  On the other hand, when the deviation of the voltage is detected at at least one location, if the deviation exceeds the upper limit value of the appropriate range, the process proceeds from step S42 to step S43 to step S45. In step S45, if the distribution line sensor 4 that has measured the deviation voltage value is within the controllable range 10, the device determination unit 5b determines the SVR 3 to be operated, and the transmission unit 5e operates the determined SVR 3 tap. (Tap operation command is transmitted) and the voltage of the distribution line 2 is lowered. Here, one SVR 3 is installed, and the target of operation is the SVR 3. By changing the tap of SVR 3, the voltage of distribution line 2 decreases. Thereafter, the procedure returns to step S41, and the above procedure is repeated until the deviation voltage value is eliminated. On the other hand, if the distribution line sensor 4 that has measured the deviation voltage value is outside the controllable range 10 in step S45, the process returns to step S41 without operating SVR3.

  Further, if the deviation voltage value detected in step S42 is less than the lower limit value of the appropriate range, the process proceeds from step S42 to step S44 to step S46. In step S46, if the distribution line sensor 4 that has measured the deviation voltage value is within the controllable range 10, the device determination means 5b determines the voltage control device 3 to be operated, and the determined voltage control device 3 tap. Is operated by the transmission means 5e to increase the voltage of the distribution line 2. By changing the tap of the voltage control device 3, the voltage of the distribution line 2 increases. Thereafter, the process returns to step S41, and the above procedure is repeated until the deviation voltage value is eliminated. On the other hand, if the distribution line sensor 4 that has measured the deviation voltage value is outside the controllable range 10 in step S46, the process returns to step S41 without operating SVR3.

  In this case, a time limit may be provided for detecting the deviation voltage value, and the voltage control device 3 may be operated when the duration of the deviation voltage value exceeds the simultaneous limit. As control in this case, for example, when the duration of the deviation voltage value exceeds the simultaneous limit (for example, 45 seconds) in step S42, the process proceeds to step S43. In step S44, the duration of the deviation voltage value is determined. It is conceivable to proceed to step S46 when the simultaneous limit is exceeded. That is, in step S42, the monitoring unit 5a counts the time during which the voltage measurement value exceeds the upper limit value of the appropriate range, and proceeds to step S43 when the time reaches a predetermined time, even if the voltage measurement value is within the appropriate range. Even if the upper limit value is exceeded, if the duration does not reach the predetermined time, the process proceeds to step S44. In step S44, the monitoring means 5a counts the time during which the voltage measurement value is below the lower limit value of the appropriate range, and proceeds to step S46 when the time reaches a predetermined time, even if the voltage measurement value is within the appropriate range. If the duration does not reach the predetermined time even if the value falls below the lower limit value, the process returns to step S41.

  Further, when the voltage measurement values at a plurality of points simultaneously become the deviation voltage values, the above control is performed based on the voltage measurement value that maximizes the deviation amount. In this case, when a voltage measurement value that exceeds the appropriate range and a voltage measurement value that falls below the appropriate range are detected simultaneously, the process proceeds from step S42 to step S43 to step S41, and the operation of the voltage control device 3 is not performed.

  Even when the voltage control device 3 is SVR, if the deviation of the voltage measurement value at another measurement point becomes maximum before the deviation of the voltage measurement value is resolved, the tap position of the operating SVR 3 is constant. The SVR 3 at the position closest to the measurement point may be additionally operated based on the voltage measurement value at another measurement point while maintaining the above. Further, when the deviation voltage value cannot be solved only by the operation of the SVR 3 at the position closest to the measurement point of the deviation voltage value, another SVR 3 at the next closest position is additionally operated, and successively until the deviation voltage value is eliminated. Another SVR 3 may be additionally operated in the order close to the above.

  Further, as the voltage control device 3, SVR and SVC may be mixed. The control in this case is shown in FIG. 11, for example. In this case, the control device 5 includes a monitoring unit 5a, a device determination unit 5b, a control amount determination unit 5c, a transmission unit 5d, and a transmission unit 5e. The positional relationship information stored in the control device 5 includes information on whether the voltage control device 3 is SVR or SVC, and each distribution line sensor 4 is within the controllable range 10 of the SVR 3. Information on whether or not is included.

  The monitoring means 5a of the control device 5 collects and monitors the voltage measurement values supplied from the distribution line sensor 4 installed at each point (step S51), and monitors the generation of a voltage that deviates from the appropriate range (step S51). S52). If there is no voltage deviation, the process returns to step S51. On the other hand, if a voltage deviation is detected at at least one location, the process proceeds from step S52 to step S53. In step S53, the distribution line sensor 4 that has measured the deviation voltage value (the deviation voltage value that maximizes the deviation amount when there are a plurality of deviation voltage values) is referred to the positional relationship information by the device determination means 5b. And whether or not the duration of the deviation voltage value is equal to or longer than a predetermined reference value (for example, 45 seconds) (second condition). Determine.

  Then, unless both the first condition and the second condition are satisfied, the process proceeds to step S54. In step S54, for example, the same procedure as the procedure from step S22 to step S26 in FIG. 1 or the same procedure as the procedure from step S32 to step S38 in FIG. 6 is performed. Thereafter, the process returns to step S51.

  If both the first condition and the second condition are satisfied in step S53, the process proceeds to step S55. In step S55, for example, the same procedure as the procedure from step S42 to step S46 of FIG. 9 is performed. Thereafter, the process returns to step S51.

  Thus, even if SVR and SVC are mixed as the voltage control device 3, voltage control of the distribution system can be performed satisfactorily.

It is a flowchart which shows 1st Embodiment of the voltage control method of the distribution system of this invention. It is a conceptual diagram which shows 1st Embodiment of the voltage control system of the distribution system of this invention. It is a block diagram which shows the control apparatus of FIG. It is a control block diagram in case the control apparatus of FIG. 3 determines control amount. It is a conceptual diagram which shows 2nd Embodiment of the voltage control system of the distribution system of this invention. It is a flowchart which shows 2nd Embodiment of the voltage control method of the distribution system of this invention. It is a conceptual diagram which shows 3rd Embodiment of the voltage control system of the distribution system of this invention. It is a conceptual diagram which shows 4th Embodiment of the voltage control system of the distribution system of this invention. It is a flowchart which shows 3rd Embodiment of the voltage control method of the distribution system of this invention. It is a block diagram which shows the control apparatus of the voltage control system which implements the voltage control method of FIG. It is a flowchart which shows 4th Embodiment of the voltage control method of the power distribution system of this invention. It is a conceptual diagram which shows 5th Embodiment of the voltage control system of the distribution system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Voltage control system 2 Distribution line 3 Voltage control apparatus 4 Distribution line sensor 5 Control apparatus 9 Section

Claims (11)

  Repeated voltage measurement at multiple points on the distribution line to monitor the occurrence of voltage that deviates from the appropriate range, and when voltage deviation is detected at at least one location, the voltage measurement value that maximizes the deviation from the appropriate range A voltage control method for a distribution system, comprising: operating a voltage control device at a position closest to the measurement point of the voltage measurement value based on the voltage measurement value.   A plurality of the voltage control devices are provided, and if the deviation of the voltage measurement value is not solved only by the operation of the voltage control device closest to the measurement point of the voltage measurement value, 2. The voltage control method for a distribution system according to claim 1, wherein another voltage control device is additionally operated in an order close to each other until the deviation of the voltage measurement value is resolved.   A plurality of the voltage control devices are provided, and when the deviation of the voltage measurement value at another measurement point becomes the maximum before the deviation of the voltage measurement value is not resolved, the operation of the voltage control device in operation is stopped. The voltage control device at a position closest to the other measurement point is additionally operated based on a voltage measurement value at the other measurement point while maintaining a constant value. Voltage control method.   4. The distribution line is divided into a plurality of sections, and deviation voltage value generation monitoring and voltage control apparatus operation are performed for each voltage measurement point and voltage control apparatus belonging to each section. The voltage control method of the distribution system as described in any one.   5. The operation of the voltage control device is not performed when a voltage measurement value that exceeds the appropriate range and a voltage measurement value that is less than the appropriate range are simultaneously detected. 6. Voltage control method for distribution system.   Voltage measurement values at all measurement points are input to one control device, and the occurrence of a voltage deviating from the appropriate range is monitored by the control device, and when a voltage deviation is detected, the deviation from the appropriate range is detected. The voltage control device at a position closest to the measurement point of the voltage measurement value is operated based on the voltage measurement value that maximizes the voltage measurement value. Voltage control method.   A voltage control device connected to the distribution line, a plurality of distribution line sensors for measuring voltages at different points on the distribution line, and a control device to which a voltage measurement value measured by the distribution line sensor is input, The controller monitors the occurrence of a voltage that deviates from the appropriate range, and detects the voltage deviation in at least one location, based on the voltage measurement value that maximizes the deviation from the appropriate range. A voltage control system for a distribution system, which operates a voltage control device closest to a measurement point of a voltage measurement value at which the deviation from the maximum is maximum.   A plurality of the voltage control devices are provided, and the control device deviates from the appropriate range only by operating the voltage control device closest to the measurement point of the voltage measurement value at which the deviation from the appropriate range is maximum. If the deviation of the voltage measurement value that maximizes the error is not resolved, the voltage control device provided in the next closest position is additionally operated, and the voltage measurement values are separated in order from one to the next until the deviation of the voltage measurement value is resolved. 7. The voltage control system for a power distribution system according to claim 6, wherein the voltage control device is additionally operated.   A plurality of the voltage control devices are provided, and the control device maximizes the deviation of the voltage measurement value at another measurement point before the deviation of the voltage measurement value at which the deviation from the appropriate range is maximized is not resolved. In such a case, the voltage control device at the position closest to the other measurement point is additionally operated based on the voltage measurement value of the other measurement point while maintaining the operation of the voltage control device during operation constant. The voltage control system for a power distribution system according to claim 7 or 8.   The distribution line is divided into a plurality of sections, and the control device performs generation voltage monitoring and operation of the voltage control apparatus for each voltage measurement point and voltage control apparatus belonging to each section. The voltage control system for a distribution system according to any one of claims 7 to 9. The said control apparatus does not operate | move the said voltage control apparatus, when the voltage measured value which exceeds the said appropriate range and the voltage measured value which falls below are detected simultaneously. The voltage control system of the power distribution system as described in one.

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