Information processing device, information processing method, and program

Abstract

To reduce the time required for determination or examination of an operation procedure or a switching operation when carrying out loop switching of a distribution system.SOLUTION: In an information processing device 100, a storage unit 111 stores measurement data with respect to a plurality of automatic voltage regulation devices and automatic reclosing devices installed in a distribution system, a processing unit 112 aggregates measurement results indicated by the measurement data to generate assisting information with respect to loop switching of the distribution system, and an output unit 113 outputs the assisting information generated by the processing unit 112 in a displayable manner when determining an operation procedure of the loop switching.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an information processing device, an information processing method, and a program. [Background technology]

[0002] Conventionally, when switching loops in a power distribution system, the operation procedure is determined so that the tap of the automatic voltage regulator (SVR: Step Voltage Regulator) is fixed and no tap switching is performed, and the automatic recloser (Re: Recloser) is prohibited from disconnecting the circuit.

[0003] Patent Document 1 discloses a technology for fixing the tap in response to the occurrence of reverse power flow when switching systems, and then returning from the fixed tap to tap switching when a change in power flow is detected. Patent Document 2 discloses a technology for determining the on / off state of a switch installed on a distribution line as the operation completion state during a power outage, and fixing it as a condition for load transfer operation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-118820 [Patent Document 2] Japanese Patent Publication No. 2022-110628 Summary of the Invention [Problem to be solved by the invention]

[0005] When switching loops in a power distribution system, the time required to create and review an operation sheet and to perform the switching operation tends to increase as the number of operations that are changed from the normal system operation settings increases. With the technologies described in Patent Documents 1 and 2, it is difficult to quickly and appropriately identify operations that can be omitted when determining the operation procedure for switching loops in a power distribution system. On the other hand, with the advancement of automation and equipment in power distribution systems, efforts are being made to shorten operation times and improve measurement data.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide an information processing device, an information processing method, and a program that can reduce the time required to determine and review operating procedures and to perform switching operations when performing loop switching in a power distribution system. [Means for solving the problem]

[0007] In order to achieve the above object, an information processing device according to the present invention comprises: a storage means for storing measurement data relating to one or both of a plurality of voltage regulators and reclosing devices installed in a power distribution system; a processing means for generating support information for loop switching of the power distribution system using the measurement data stored in the storage means; an output means for displayably outputting the support information generated by the processing means when determining the operation procedure for the loop switching; Equipped with. [Effects of the Invention]

[0008] According to the present invention, when performing loop switching in a power distribution system, it is possible to reduce the time required to determine and examine the operation procedure and to perform the switching operation. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an example of the configuration of an information processing device. [Figure 2] FIG. 2 is a diagram illustrating an example of a configuration of programs and data stored in a storage unit. [Figure 3]10 is a flowchart illustrating an example of a voltage adjustment operation support process. [Figure 4] 10 is a flowchart illustrating an example of a reclosing operation support process. [Figure 5] FIG. 10 is a diagram showing an example of a first support information display. [Figure 6] FIG. 10 is a diagram showing an example of a second support information display. [Figure 7] FIG. 10 is a diagram showing an example of a second support information display. [Figure 8] FIG. 10 is a diagram showing an example of a third support information display. [Figure 9] FIG. 10 is a diagram showing an example of a fourth support information display. [Figure 10] FIG. 10 is a diagram showing an example of a fifth support information display. [Figure 11] FIG. 10 is a diagram illustrating an example of a feeder included in a loop route in a verification example. [Figure 12] FIG. 10 is a diagram showing a voltage fluctuation transition in an example of verification. [Figure 13] FIG. 10 is a diagram showing a current transition in an example of verification. [Figure 14] FIG. 10 is a diagram showing tap transitions in a verification example. [Figure 15] FIG. 10 is a diagram showing a setting value ratio in an example of verification. [Figure 16] FIG. 10 is a diagram showing a setting value margin in an example of verification. [Figure 17] FIG. 10 is a diagram showing the difference in ratio as confirmation of the accuracy of the verification value. [Figure 18] FIG. 10 is a diagram showing measurement results of an automatic voltage regulator in actual operation. [Figure 19] FIG. 10 is a diagram showing an example of a location where a switching test is performed in an example of verification of operational effects. [Figure 20] FIG. 10 is a diagram showing the calculation results of average values ​​measured over time in an example of verification of operational effects. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described below. An information processing device 100 according to this embodiment may be, for example, a personal computer, a server device, a workstation, or any other computer using a processor capable of executing any information processing or signal processing. As shown in Fig. 1, the information processing device 100 includes a storage unit 111, a processing unit 112, an output unit 113, an input unit 114, and a communication unit 115.

[0011] The storage unit 111 can be configured to include, for example, semiconductor memories such as ROM (Read Only Memory), RAM (Random Access Memory), HDD (Hard Disk Drive), flash memory, optical disk recording / reading devices, magneto-optical disk recording / reading devices, a combination of some or all of these, or any other storage device using electronic, magnetic, or optical methods, or some or all of these. Part or all of the storage unit 111 may be built into the information processing device 100 or may be configured to be externally attachable. The storage unit 111 stores various programs executed in the information processing device 100, data used for various processes, and the like.

[0012] The processing unit 112 can be configured to include a processor such as a CPU (Central Processing Unit). The processor may be configured to include an MPU (Micro-Processing Unit), a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), or some or all of these. The processing unit 112 executes various programs in the information processing device 100, enabling software-based information processing to be specifically realized using hardware.

[0013] The output unit 113 can be configured to include, for example, a display device such as a liquid crystal display, a printing device such as a printer, an audio output device such as a speaker, a combination of some or all of these, or any other arbitrary output device. Some or all of the output unit 113 may be built into the information processing device 100 or may be configured to be externally attachable. The output unit 113 outputs various information that is the result of execution of processing in the information processing device 100 so that it can be used by the user.

[0014] The input unit 114 can be configured to include, for example, a keyboard, a mouse, a touch panel, a combination of some or all of these, or any other input device. The input unit 114 may include any input interface such as a USB (Universal Serial Bas) port. The input unit 114 inputs various commands to the processing unit 112 to start the execution of processing in the information processing device 100 in response to the detection result of an input operation by the user.

[0015] The communication unit 115 may be configured to include any network interface. The communication unit 115 may be connected to, for example, a local area network (LAN), a wide area network (WAN), the Internet, an intranet, a telephone line, a composite fiber optic overhead ground wire (OPGW), a mobile communication network, a combination of some or all of these, or any other network using some or all of these, such as an electric communication network including a wireless communication network, an optical communication network, or any other network using some or all of these, and may transmit various data and information by sending and receiving communication signals. In this embodiment, the communication unit 115 performs communication to acquire measurement data 200. The measurement data 200 is stored in a file in a predetermined format, such as a comma separated value (CSV) file, at each business location of the electric power company. The measurement data 200 acquired by the communication unit 115 is stored in the storage unit 111.

[0016] 2, the storage unit 111 stores a switching assistance program 301, voltage adjustment-related data 302, reclosing-related data 303, and various other programs and data. The switching assistance program 301 is a program that causes the processing unit 112 to provide a function for generating assistance information related to loop switching in a power distribution system and outputting the information so that it can be used by a user of the information processing device 100. The voltage adjustment-related data 302 is included in the measurement data 200 and indicates measurement results related to multiple automatic voltage regulators installed in the power distribution system as voltage regulators. The reclosing-related data 303 is included in the measurement data 200 and indicates measurement results related to multiple automatic reclosers installed in the power distribution system as reclosers.

[0017] The switching support program 301 includes a voltage adjustment operation support program 311 and a reclosing operation support program 312. The voltage adjustment operation support program 311 is a program for causing the processing unit 112 to execute a voltage adjustment operation support process. The voltage adjustment operation support process is a process for providing support information regarding the omission of operation of each automatic voltage regulator, for a plurality of automatic voltage regulators installed in the distribution system as voltage regulators. The reclosing operation support program 312 is a program for causing the processing unit 112 to execute a reclosing operation support process. The reclosing operation support process is a process for providing support information regarding the omission of operation of each automatic reclosing device, for a plurality of automatic reclosing devices installed in the distribution system as reclosing devices. Loop switching that is performed without the need for locking operations of the automatic voltage regulators and the automatic reclosing devices is also called lockless switching.

[0018] The voltage adjustment operation support program 311 causes the information processing device 100 (as a computer) to function as a storage means for voltage adjustment-related data 302 by the storage unit 111, a processing means for voltage adjustment operation support by the processing unit 112, and an output means for voltage adjustment operation support information by the output unit 113. In this case, the storage unit 111 stores the voltage adjustment-related data 302, which is measurement data related to multiple automatic voltage regulators installed in the power distribution system as voltage regulators. The processing unit 112 aggregates the measurement results indicated by the voltage adjustment-related data 302 and generates voltage adjustment operation support information related to omission of operation of automatic voltage regulators, among the support information related to loop switching in the power distribution system. When determining the operation procedure for loop switching, the output unit 113 displays and provides the voltage adjustment operation support information generated by the processing unit 112 so that it can be used by a user.

[0019] The reclosing operation support program 312 causes the information processing device 100 (as a computer) to function as a storage means for the reclosing-related data 303 by the storage unit 111, a processing means for reclosing operation support by the processing unit 112, and an output means for reclosing operation support information by the output unit 113. In this case, the storage unit 111 stores the reclosing-related data 303, which is measurement data related to multiple automatic reclosers installed in the distribution system as reclosers. The processing unit 112 aggregates the measurement results indicated by the reclosing-related data 303 and generates reclosing operation support information related to omission of automatic recloser operation, among the support information related to loop switching in the distribution system. When determining the operation procedure for loop switching, the output unit 113 displays and provides the reclosing operation support information generated by the processing unit 112 so that it can be used by a user.

[0020] The voltage regulation related data 302 includes tap operation history data 321 and tap position measurement data 322. The tap operation history data 321 indicates a history of tap operations in an automatic voltage regulator corresponding to past loop switching as first measurement data included in the measurement data 200. The tap position measurement data 322 indicates a tap position in an automatic voltage regulator measured at a tap position measurement timing as second measurement data included in the measurement data 200.

[0021] The tap operation corresponding to the loop switching includes a plurality of events CA01 to CA05. The plurality of events CA01 to CA05 related to the tap operation include a first event CA01 in which there is no tap operation and the tap position is fixed as it is, a second event CA02 in which the tap is lowered by one tap, a third event CA03 in which the tap is lowered by two taps, a fourth event CA04 in which the tap is raised by one tap, and a fifth event CA05 in which the tap is raised by two taps.

[0022] The tap position measurement timing may be, for example, a timing at which measurements are taken every 5 minutes, and may be any timing that allows for 288 measurement results per day. The tap position measurement timing may also be any timing that can be set as long as it allows for appropriate measurement of the tap positions of multiple automatic voltage regulators installed in the power distribution system.

[0023] The reclosing-related data 303 includes three-phase current value measurement data 331 and zero-phase voltage value measurement data 332. The three-phase current value measurement data 331 and the zero-phase voltage value measurement data 332 are third measurement data included in the measurement data 200 and indicate three-phase current values ​​and zero-phase voltage values ​​measured by the autorecloser at current and voltage measurement timings. Of these, the three-phase current value measurement data 331 indicates the measurement results of the three-phase current values, and the zero-phase voltage value measurement data 332 indicates the measurement results of the zero-phase voltage values. The current and voltage measurement timings may be, similar to the tap position measurement timings, as long as measurements are taken at intervals of, for example, five minutes. The current and voltage measurement timings may be arbitrarily set as long as they allow appropriate measurement of the three-phase current values ​​and zero-phase voltage values ​​of the autoreclosers installed in the power distribution system.

[0024] When loop switching of a distribution system is performed, the multiple automatic voltage regulators installed in the distribution system may adjust their taps in advance in anticipation of a voltage drop after the switching. Furthermore, there is a risk of large voltage fluctuations occurring due to the tap operation when the loop is formed. Therefore, conventionally, when loop switching of a distribution system is performed, the tap positions of the automatic voltage regulators are fixed. Therefore, as a first consideration, it is necessary to consider the impact on voltage of loop switching when automatic tap switching is performed while the automatic voltage regulators are in normal operation.

[0025] When the automatic voltage regulator is at a high-voltage tap position, there is a risk that cross currents and zero-phase voltages will increase if the loop in the distribution system is switched. Therefore, the second consideration is whether or not the automatic voltage regulator has a function that allows the tap position to be known in advance when switching the loop in the distribution system.

[0026] When switching loops in a power distribution system, there is a risk that a circuit breaker will be triggered in multiple autoreclosers installed in the power distribution system if the three-phase current value exceeds the setting value of an overcurrent relay (OCR) or if the zero-phase voltage value exceeds the setting value for detecting a ground fault. Therefore, as a third consideration, it is necessary to consider a function that can predict the three-phase current values ​​and zero-phase voltage values ​​in the autoreclosers when switching loops in a power distribution system.

[0027] Based on these three considerations, the information processing device 100 according to this embodiment generates support information that appropriately supports the determination of an operation procedure when performing loop switching in a power distribution system by having the processing unit 112 execute one or both of a voltage adjustment operation support process and a reclosing operation support process, and provides the support information so that it can be used by the user of the information processing device 100. The support information can be classified into five types, from first support information to fifth support information.

[0028] The first support information can be generated by aggregating the tap operation history indicated by the tap operation history data 321, which is the first measurement data, in response to the first consideration, and can identify the proportion of tap operations in the automatic voltage regulator. The second support information can be generated by aggregating the tap positions indicated by the tap position measurement data 322, which is the second measurement data, in response to the second consideration, and can identify the proportion of tap positions in the automatic voltage regulator. The third support information can be generated by aggregating the three-phase current values ​​and zero-phase voltage values ​​indicated by the three-phase current value measurement data 331 and the zero-phase voltage value measurement data 332, which are the third measurement data, in response to the third consideration, and can identify the distribution of the three-phase current values ​​and zero-phase voltage values ​​in the automatic reclosing device. The fourth support information can be generated in response to the third consideration by aggregating the three-phase current values ​​and zero-phase voltage values ​​indicated by the three-phase current value measurement data 331 and the zero-phase voltage value measurement data 332, which are the third measurement data, and can identify the ratios of each of the three-phase current values ​​and zero-phase voltage values ​​in the autorecloser to preset setting values. The fifth support information can be generated in response to the third consideration by aggregating the three-phase current values ​​and zero-phase voltage values ​​indicated by the three-phase current value measurement data 331 and the zero-phase voltage value measurement data 332, which are the third measurement data, and can identify the margins of each of the three-phase current values ​​and zero-phase voltage values ​​in the autorecloser to preset setting values.

[0029] 3, a description will be given of a voltage adjustment operation support process executed by the processing unit 112 of the information processing device 100. The voltage adjustment operation support process can be executed by the processing unit 112 reading out the voltage adjustment operation support program 311 from the switching support program 301 stored in the storage unit 111. The voltage adjustment operation support process uses the voltage adjustment-related data 302 stored in the storage unit 111 to output first support information and second support information in a displayable manner by the output unit 113 as support information that enables a determination to be made as to whether lockless switching of the automatic voltage regulator is possible when loop switching is performed.

[0030] In the voltage adjustment operation support process, the processing unit 112 determines whether or not a first command is present (step S101). The first command may be, for example, a command to generate first support information related to the tap operation ratio of an automatic voltage regulator, which is generated by the user of the information processing device 100 operating an operation device included in the input unit 114, such as inputting a command, clicking a button display, tapping an icon display, or selecting a tab corresponding to a worksheet.

[0031] If it is determined that the first command has been issued (step S101; Yes), tap operation history data is acquired (step S102). The processing unit 112 may acquire the tap operation history data by reading out the tap operation history data 321 from the voltage adjustment related data 302 stored in the storage unit 111. Next, the tap operation history is tallied (step S103). The processing unit 112 tallies the tap operation history indicated by the tap operation history data 321 acquired in step S102. In this case, the number of occurrences of each event related to the tap operation may be calculated in correspondence with the three state changes SC01 to SC03.

[0032] The three state changes SC01 to SC03 correspond to a combination of pre-change and post-change states selected from the three states ST01 to ST03: the tap position state ST01 during automatic operation before loop switching, the tap position state ST02 after manual adjustment before loop switching, and the tap position state ST03 during automatic operation after loop switching. The state change SC01 is a case in which state ST01 is selected as the pre-change state, state ST02 is selected as the post-change state, and a change occurs from state ST01 to state ST02. The state change SC02 is a case in which state ST02 is selected as the pre-change state, state ST03 is selected as the post-change state, and a change occurs from state ST02 to state ST03. The state change SC03 is a case in which state ST01 is selected as the pre-change state, state ST03 is selected as the post-change state, and a change occurs from state ST01 to state ST03.

[0033] The processing unit 112 counts the tap difference between the state ST01, which is the state before the change, and the state ST02, which is the state after the change, in response to the state change SC01, and calculates the number of times each of the following cases occurred: when the tap position is fixed as it is for the first event CA01 with no change, when the tap position is lowered by one tap for the second event CA02, when the tap position is lowered by two taps for the third event CA03, when the tap position is raised by one tap for the fourth event CA04, and when the tap position is raised by two taps for the fifth event CA05. Similarly, the processing unit 112 counts the tap difference between the state before the change and the state after the change for the state changes SC02 and SC03, and calculates the number of times each of the cases corresponding to the first event CA01 to the fifth event CA05 occurred.

[0034] After step S103, tapping action ratio information is generated (step S104). The processing unit 112 generates tapping action ratio information that can identify the occurrence ratio of each event related to tapping action using the aggregation result of step S103. For example, in response to the state change SC01, if the tap position is fixed as it is for the first event CA01 with no change, if the tap position is lowered by one tap for the second event CA02, lowered by two taps for the third event CA03, raised by one tap for the fourth event CA04, or raised by two taps for the fifth event CA05, the ratio of tapping action corresponding to each case is calculated by dividing the number of times each of these cases occurred by the total number of times. Similarly, for the state changes SC02 and SC03, the ratio of tapping action corresponding to each of the first event CA01 to the fifth event CA05 is calculated.

[0035] Following step S104, first support information is generated (step S105). The processing unit 112 generates the first support information configured to include the tapping action ratio information generated in step S104. The first support information may include graph display information that displays the tapping action ratios in a bar graph corresponding to the three state changes SC01 to SC03. The first support information generated in step S105 is output so as to be displayable by a display device included in the output unit 113 (step S106).

[0036] If it is determined in step S101 that there is no first command (step S101; No), it is determined whether there is a second command (step S107). The second command may be, for example, a command to generate second support information related to the tap position of the automatic voltage regulator, which is issued by the user of the information processing device 100 operating an operating device included in the input unit 114, such as inputting a command, clicking a button display, tapping an icon display, or selecting a tab corresponding to a worksheet.

[0037] If it is determined that the second command is present (step S107; Yes), the tap position measurement data 322 is acquired (step S108). The processing unit 112 may acquire the tap position measurement data 322 by reading it out from the voltage regulation related data 302 stored in the storage unit 111. Next, the tap positions are tallied (step S109). The processing unit 112 tallies the tap positions indicated by the tap position measurement data 322 acquired in step S108. In this case, the number of measurements is calculated for each of the multiple taps installed in the automatic voltage regulator. Alternatively, the multiple taps installed in the automatic voltage regulator may be divided into multiple ranges, and the number of measurements for the tap positions included in each range may be calculated.

[0038] The multiple ranges into which the multiple taps in the automatic voltage regulator are divided may include a specific range and ranges other than the specific range. For example, if the automatic voltage regulator has a total of nine taps, from the first tap to the ninth tap, the ranges may include a specific range RE01 into which the first tap to the fifth tap are divided, a range RE02 into which the sixth and seventh taps are divided, and a range RE03 into which the eighth and ninth taps are divided. For each of the multiple automatic voltage regulators, the processing unit 112 calculates the number of times the tap position is one of the first tap to the fifth tap included in the specific range RE01, the tap position is one of the sixth tap and the seventh tap included in the range RE02 other than the specific range RE01, and the tap position is one of the eighth tap and the ninth tap included in the range RE03 other than the specific range RE01.

[0039] After step S109, tap position ratio information is generated (step S110). The processing unit 112 generates tap position ratio information that can identify the ratio of tap positions included in the specific range RE01, using the counting result from step S109. For example, if the tap positions are the first to fifth taps included in the specific range RE01, if the tap position is either the sixth or seventh tap included in a range RE02 other than the specific range RE01, or if the tap position is either the eighth or ninth tap included in a range RE03 other than the specific range RE01, the processing unit 112 calculates the ratio of tap positions corresponding to each case by dividing the number of times each of these cases occurred by the total number of times.

[0040] Following step S110, second support information is generated (step S111). The processing unit 112 generates the second support information including the aggregated data for each tap position aggregated in step S109 and the tap position ratio information generated in step S110. The second support information may include first graph information displaying the number of measurements and ratio for each tap position using a bar graph and a line graph, and second graph information displaying the ratio of tap positions included in the specific range RE01 and the ratio of tap positions included in ranges RE02 and RE03 outside the specific range RE01 using a dot plot. The second support information may also include voltage adjustment evaluation information corresponding to the result of determining whether lockless switching is possible for the automatic voltage regulator. The lockless switching possibility for the automatic voltage regulator can be determined using a preset lockless determination criterion for voltage adjustment operation as the voltage adjustment determination criterion. The lockless determination criterion for voltage adjustment operation may be, for example, whether the ratio of the tap positions from the first tap to the fifth tap included in the specific range RE01 is 95% or more, and whether confirmation is required or not if it is less than 95%. Alternatively, any value based on the loop switching execution history, the operational performance of the power distribution system, or the like may be used as the lockless determination criterion for voltage adjustment operation.

[0041] In this way, the second support information is generated including voltage regulation evaluation information corresponding to the result of determining whether lockless switching is possible for the automatic voltage regulator. The voltage regulation evaluation information can identify whether operation of the automatic voltage regulator can be omitted by using the ratio of tap positions in the automatic voltage regulator and the lockless determination criterion for voltage regulation operation as a preset voltage regulation determination criterion. The second generation information generated in step S111 is output so as to be displayable by a display device or the like included in the output unit 113 (step S112).

[0042] After steps S106 and S112, it is determined whether an end command has been issued (step S113). As with the first command, the presence or absence of an end command may be determined in response to a command input or the like, or in response to an end code description in the voltage adjustment operation support program 311. If it is determined that an end command has not been issued (step S113; No), the process returns to step S101, and it is sufficient that the process can be repeated. If it is determined that an end command has been issued (step S113; Yes), the execution of the voltage adjustment operation support process ends.

[0043] The reclosing operation support process executed by the processing unit 112 of the information processing device 100 will be described with reference to the flowchart in Fig. 4. The reclosing operation support process can be executed by the processing unit 112 reading out the reclosing operation support program 312 from the switching support program 301 stored in the storage unit 111. In the reclosing operation support process, the output unit 113 displays third support information, fourth support information, and fifth support information using the reclosing-related data 303 stored in the storage unit 111, as support information that enables determination of whether lockless switching of the automatic recloser is possible when loop switching is performed.

[0044] In the reclosing operation support process, the processing unit 112 determines whether or not a third command is present (step S201). The third command may be a command that commands the user of the information processing device 100 to generate third to fifth support information related to three-phase current values ​​and zero-phase voltage values ​​in the autoreclosing device by operating an operating device included in the input unit 114, such as by inputting a command, clicking a button display, tapping an icon display, or selecting a tab corresponding to a worksheet.

[0045] When it is determined that the third command is present (step S201; Yes), the processing unit 112 acquires three-phase current value measurement data 331 (step S202). The processing unit 112 may acquire the three-phase current value measurement data 331 by reading it out of the reclosing related data 303 stored in the storage unit 111. Next, the processing unit 112 acquires zero-phase voltage value measurement data 332 (step S203). The processing unit 112 may acquire the zero-phase voltage value measurement data 332 by reading it out of the reclosing related data 303 stored in the storage unit 111.

[0046] Following step S203, the three-phase current values ​​are tallied (step S204). The processing unit 112 tallies the three-phase current values ​​indicated by the three-phase current value measurement data 331 acquired in step S202. In this case, the measurement results of the current values ​​are tallied for each of the R phase, S phase, and T phase in the autoreclosing device. Furthermore, in conjunction with step S204, the zero-phase voltage values ​​are tallied (step S205). The processing unit 112 tallies the zero-phase voltage values ​​indicated by the zero-phase voltage value measurement data 332 acquired in step S203.

[0047] After step S205, it is determined whether or not distribution output has been selected (step S206). The selection of distribution output may be input as an option or additional item along with or after the input of the third command. If distribution output is selected (step S206; Yes), measurement value distribution information is generated (step S207). The processing unit 112 generates measurement value distribution information that can identify the distribution of each of the three-phase current values ​​and the zero-phase voltage values ​​using a box-and-whisker plot, using the three-phase current values ​​aggregated in step S204 and the zero-phase voltage values ​​aggregated in step S205. In the box-and-whisker plot, the bottom and top of the box indicate the 25th and 75th percentiles. In the box-and-whisker plot, the whiskers are drawn so as to extend 1.5 times the interquartile range from the top and bottom of the box. The interquartile range corresponds to the length of the box. In the box-and-whisker plot, values ​​above or below the ends of the whiskers are plotted as dots and are called outliers.

[0048] Following step S207, third support information is generated (step S208). The processing unit 112 generates the third support information including maximum value information, which is the maximum value extracted from the three-phase current values ​​aggregated in step S204 and the zero-phase voltage values ​​aggregated in step S205, as well as the measurement value distribution information generated in step S207. The third support information may include graph information displaying the distribution of the aggregated three-phase current values ​​and zero-phase voltage values ​​using a box-and-whisker plot, and comparison data information displaying the maximum values ​​of the three-phase current values ​​and zero-phase voltage values ​​so that they can be compared with the setting values ​​for the overcurrent relay and ground fault determination. The third support information may also include reclosure evaluation information corresponding to the result of determining whether or not lockless switching of the autorecloser is possible. The lockless operation of the autorecloser can be determined using a preset lockless determination criterion for reclosing operation as the reclosure determination criterion. The lockless determination criteria for reclosing operation may be, for example, that the ratio of the maximum three-phase current value during normal operation to the setting value of the overcurrent relay is acceptable if it is less than 50%, and that confirmation is required or not acceptable if it is 50% or more. Additionally, the ratio of the maximum zero-phase voltage value during normal operation to the setting value for ground fault detection may be acceptable if it is less than 50%, and that confirmation is required or not acceptable if it is 50% or more. However, the maximum zero-phase voltage value during normal operation will exceed the setting value if the value during a fault is extracted as the maximum. Therefore, the maximum voltage value is determined by excluding outliers from the box plot.

[0049] As another setting example, for the maximum current value of the three-phase current value during normal operation, if the margin of the overcurrent relay setting is 100 [A] or more, it is considered to be possible, and if it is less than 100 [A], confirmation is required or it is not possible. In addition, for the maximum voltage value of the zero-phase voltage value, if the margin of the setting for determining a ground fault is 100 [V] or more, it is considered to be possible, and if it is less than 100 [V], confirmation is required or it is not possible. It is also possible to consider it to be possible when all of these lockless determination criteria are met, and to consider confirmation is required or it is not possible when any of the criteria are not met. In addition, any value may be used as the lockless determination criteria for reclosing operation based on the loop switching implementation history or the operational performance of the distribution system.

[0050] In this way, the third support information is generated including reclosure evaluation information corresponding to the result of determining whether lockless switching is possible for the autorecloser. The reclosure evaluation information can identify whether operation of the autorecloser can be omitted by using one or both of the three-phase current values ​​and the zero-phase voltage value of the autorecloser and the lockless determination criterion for reclosing operation as a preset reclosing determination criterion. The third support information generated in step S208 is output so as to be displayable by a display device or the like included in the output unit 113 (step S209).

[0051] If the distributed output is not selected in step S206 (step S206; No), it is determined whether the proportional output is selected (step S210). The selection of the proportional output may be input as an option or additional item along with the input of the third command or after the input of the third command, similar to the selection of the distributed output. If the proportional output is selected (step S210; Yes), setting value ratio information is generated (step S211). The processing unit 112 generates setting value ratio information that can identify the ratios of the three-phase current values ​​and the zero-phase voltage values ​​to preset setting values, using the three-phase current values ​​collected in step S204 and the zero-phase voltage values ​​collected in step S205. The set value ratio information includes first set value ratio information that can specify the ratio of the maximum current value in the normal system among the three-phase current values ​​in the autorecloser to the set value of the overcurrent relay, and second set value ratio information that can specify the ratio of the maximum voltage value in the normal system among the zero-phase voltage values ​​in the autorecloser to the set value for ground fault detection, where the maximum voltage value in the normal system among the zero-phase voltage values ​​is determined by excluding outliers in the box plot.

[0052] Following step S211, fourth support information is generated (step S212). The processing unit 112 generates the fourth support information configured to include the setting value ratio information generated in step S211. The fourth support information may include graph information that displays, by dot plot or line graph, the ratio of the three-phase current value to the setting value and the ratio of the zero-phase voltage value to the setting value corresponding to each autoreclosing device. A judgment boundary line corresponding to the lockless judgment criterion for the reclosing operation may be added to the dot plot or line graph. The fourth support information generated in step S212 is output so as to be displayable by a display device or the like included in the output unit 113 (step S213).

[0053] If the ratio output is not selected in step S210 (step S210; No), it is determined whether the margin range output is selected (step S214). The margin range output may be selected as an option or an additional item when the third command is input or after the third command is input, similar to the selection of the distribution output or the ratio output. If the margin range output is selected (step S214; Yes), setting value margin range information is generated (step S215). The processing unit 112 generates setting value margin range information that can identify the margin ranges of the three-phase current values ​​and the zero-phase voltage values ​​relative to preset setting values, using the three-phase current values ​​collected in step S204 and the zero-phase voltage values ​​collected in step S205. The setting value margin information includes first setting value margin information capable of specifying a margin for the setting value of the overcurrent relay for the maximum current value in the normal system among the three-phase current values ​​in the autorecloser, and second setting value margin information capable of specifying a margin for the maximum voltage value in the normal system among the zero-phase voltage values ​​in the autorecloser, for the setting value for ground fault detection, where the maximum voltage value in the normal system among the zero-phase voltage values ​​is determined by excluding outliers in the box plot.

[0054] Following step S215, fifth support information is generated (step S216). The processing unit 112 generates the fifth support information configured to include the setting value margin width information generated in step S215. The fifth support information may include graph information that displays, by dot plot or line graph, the ratio of the three-phase current value to the setting value corresponding to each autoreclosing device and the margin width of the zero-phase voltage value to the setting value. A judgment boundary line corresponding to the lockless judgment criterion for the reclosing operation may be added to the dot plot or line graph. The fifth support information generated in step S216 is output so as to be displayable by a display device or the like included in the output unit 113 (step S217).

[0055] After steps S209, S213, and S217, it is determined whether or not an end command has been issued (step S218). As with the third command, the presence or absence of an end command may be determined in response to a command input or the like, or in response to an end code description in the reclosing operation support program 312. If it is determined that an end command has not been issued (step S218; No), the process returns to step S201, and it is sufficient that the process can be repeated. If it is determined that an end command has been issued (step S218; Yes), the execution of the reclosing operation support process ends.

[0056] Display examples of support information will be described with reference to Fig. 5 to Fig. 10. Display examples of support information in this embodiment include a first support information display D01 as shown in Fig. 5, second support information displays D02A and D02B as shown in Fig. 6 and Fig. 7, a third support information display D03 as shown in Fig. 8, a fourth support information display D04 as shown in Fig. 9, and a fifth support information display D05 as shown in Fig. 10.

[0057] The first support information display D01 shown in Fig. 5 is an example display that outputs the first support information and includes a graph display section E11. The graph display section E11 can display, as a bar graph, the proportion of tapping operations corresponding to each of the first to fifth events CA01 to CA05, corresponding to three state changes SC01 to SC03. The proportions of tapping operations corresponding to each of the first to fifth events CA01 to CA05 are shown, from left to right, for each state change SC01 to SC03: the proportion of a two-tap decrease as the third event, the proportion of a one-tap decrease as the second event, the proportion of a fixed current state as the first event, the proportion of a one-tap increase as the fourth event, and the proportion of a two-tap increase as the fifth event.

[0058] As a specific example of the first support information display D01, it is possible to display a bar graph in the graph display unit E11 by aggregating the tap operation history of all 67 automatic voltage regulators implemented in fiscal year 2022. Of the aggregation results, approximately 75% will remain at the current tap position, the same as before the switchover.

[0059] Of the three state changes SC01 to SC03, state change SC01 occurs when the tap position changes from ST01 during automatic operation before loop switching to ST02 after manual adjustment before loop switching. It can be seen that a relatively large percentage (18%) of cases involve a one-tap increase operation before loop switching, anticipating a voltage drop after switching. In contrast, state change SC02 occurs when the tap position changes from ST02 after manual adjustment before loop switching to ST03 during automatic operation after loop switching. It can be seen that a relatively large percentage (19%) involve an automatic one-tap decrease. And state change SC03 occurs when the tap position changes from ST01 during automatic operation before loop switching to ST03 during automatic operation after loop switching. As shown in the area enclosed by dashed line LN01 in Figure 5, the percentage of tap changes is within ±1 tap difference in 96% of cases, and a maximum of 4% is a two-tap difference. This shows that when loop switching of a power distribution system is performed, even if the tap position of the automatic voltage regulator is left as it is during automatic operation and no operation is performed, there will be no large tap difference.

[0060] If loop switching is performed without operating the automatic voltage regulator in automatic operation, the switching operation is completed in about one minute, so even if there is tap operation when the loop is formed, it will only be about one tap, which is equivalent to about 1.5V in low voltage, so there will be no major fluctuations. In addition, tap operation when the loop is formed will not cause problems such as cross currents.

[0061] The second support information display D02A shown in FIG. 6 is a first display example of the second support information output, and includes an aggregated value display section E21 and a graph display section E22. The aggregated value display section E21 can display, as a data sheet, the aggregated number of measurements for each of the multiple installed taps of the automatic voltage regulator, the percentage of each tap position, the percentage of tap positions within a specific range RE01, the percentage of tap positions within a range RE02 other than the specific range RE01, and the percentage of tap positions within a range RE03 other than the specific range RE01. The aggregated value display section E21 includes a lockless determination display ES01 for voltage regulation operation corresponding to the voltage regulation evaluation information. The graph display section E22 can display, as a bar graph, the aggregated number of measurements for each of the multiple installed taps of the automatic voltage regulator, and as a line graph, the percentage of each tap position.

[0062] 7 is a second display example of the second support information output, and includes a graph display unit E23. The second support information display D02B may be displayed at a different position on the same screen as the second support information display D02A, or may be displayed by switching with the second support information display D02A in response to a command to change the display. The graph display unit E23 is capable of displaying, as dot plots, the proportion of tap positions that fall within a specific range RE01 and the proportions of tap positions that fall within ranges RE02 and RE03 outside the specific range RE01, for each of a plurality of automatic voltage regulators installed in the power distribution system.

[0063] As a specific example of the second support information displays D02A and D02B, one year's worth of data logs are stored as measurement data 200 for 22 automatic voltage regulators installed in a loop system, and then automatically read and analyzed. Analysis, including tabulation of tap positions, is completed in approximately one minute per unit. In the graph display section E23 of the second support information display D02B, only the automatic voltage regulator TV3430 has 63% of its tap positions included in the specific range RE01, and is therefore judged to require confirmation. All other automatic voltage regulators meet the lockless judgment criteria, and are therefore judged to be able to perform lockless switching.

[0064] The first support information display D01 shown in Fig. 5, the second support information display D02A shown in Fig. 6, and the second support information display D02B shown in Fig. 7, which can be output by these displays, are generated to be included in voltage regulation operation support information related to omitting the operation of an automatic voltage regulator when performing loop switching of a power distribution system. By being provided with the voltage regulation operation support information including the first support information and the second support information, the user of the information processing device 100 can quickly and appropriately determine whether or not the operation of an automatic voltage regulator can be omitted when determining the operation procedure for loop switching.

[0065] The third support information display D03 shown in FIG. 8 is an example display that outputs the third support information and includes an aggregated value display unit E31 and graph display units E32 and E33. The aggregated value display unit E31 can display, as a data sheet, the maximum current and voltage values, corresponding overcurrent relay and ground fault detection settings, ratios and margins for each setting value, and other information for the three-phase current and zero-phase voltage values ​​aggregated for each autorecloser. A lockless reclosing operation determination display ES02 is provided inside or outside the aggregated value display unit E31 in accordance with the reclosing evaluation information. The graph display unit E32 can display the measurement results of the three-phase current values ​​as a box and whisker plot. The graph display unit E33 can display the measurement results of the zero-phase voltage values ​​as a box and whisker plot.

[0066] The fourth support information display D04 shown in FIG. 9 is an example of a display that outputs the fourth support information and includes a graph display unit E41. The graph display unit E41 can display, as a dot plot or line graph, the ratios of three-phase current values ​​and zero-phase voltage values ​​to preset settings for each of the multiple autoreclosers installed in the distribution system. The three-phase current value ratio is the ratio of the maximum current value of each autorecloser in the normal system to the setting value of the overcurrent relay. The zero-phase voltage value ratio is the ratio of the maximum voltage value of each autorecloser in the normal system, excluding outliers in the box-and-whisker plot, to the setting value for ground fault detection. The graph display unit E41 in FIG. 9 includes a determination criterion display LN02, which indicates a broken line at 50% of the setting value as a determination boundary line corresponding to the lockless determination criterion for reclosing operation. This makes it easier to determine whether lockless switching is possible. The determination criterion display LN02 may not be included.

[0067] The fifth support information display D05 shown in FIG. 10 is an example of a display that outputs the fifth support information and includes a graph display unit E51. The graph display unit E51 can display, as a dot plot or line graph, the margins of the three-phase current values ​​and zero-phase voltage values ​​relative to preset settings for each of the autoreclosers installed in the distribution system. The margins of the three-phase current values ​​are the margins of the maximum current values ​​of each autorecloser in the normal system relative to the setting value of the overcurrent relay. The margins of the zero-phase voltage values ​​are the margins of the maximum voltage values ​​of each autorecloser in the normal system, excluding outliers in the box-and-whisker plot, relative to the setting value for ground fault detection. The graph display unit E51 in FIG. 10 also includes a determination criterion display LN03, which indicates, with dashed lines, the positions where the margins are 100 [A] and 100 [V] as the determination boundary line corresponding to the lockless determination criterion for reclosing operation. This makes it easier to determine whether lockless switching is possible. Note that the determination criterion display LN03 may not be included.

[0068] As a specific example of the third support information display D03, the fourth support information display D04, and the fifth support information display D05, one year's worth of data logs for 28 autoreclosers installed in a loop system are included in the measurement data 200 and saved, and then automatically loaded and analyzed. In the graph display section E41 of the fourth support information display D04, the ratios of the three-phase current values ​​and zero-phase voltage values ​​to their set values ​​are less than 50% (as indicated by the dashed line LN02 in Figure 9) for all autoreclosers, indicating that lockless switching is possible. In the graph display section E51 of the fifth support information display D05, the margins of the three-phase current values ​​and zero-phase voltage values ​​to their set values ​​are less than 100 [A] (as indicated by the dashed line LN03 in Figure 10) for the three-phase current values ​​of the three autoreclosers TR6125, TR6920, and TR7506, indicating that confirmation is required. Other auto-reclosers are determined to be capable of performing lockless switching by satisfying the lockless determination criteria.

[0069] The third support information display D03 shown in Fig. 8, the fourth support information display D04 shown in Fig. 9, and the fifth support information display D05 shown in Fig. 10, which can be output by these displays, are generated to be included in reclosing operation support information related to omitting the operation of the automatic recloser when performing loop switching in a power distribution system. By being provided with the reclosing operation support information including the third support information, fourth support information, and fifth support information, the user of the information processing device 100 can quickly and appropriately determine whether or not the operation of the automatic recloser can be omitted when determining the operation procedure for loop switching.

[0070] Next, an example of verification of the output results of support information using the information processing device 100 according to this embodiment will be described. Verification was performed on a total of 25 loops, each including feeders F01 and F02 as shown in FIG. 11, each with an automatic voltage regulator and an automatic recloser installed within the loop. This verification was performed from January to March, close to the peak current of the year, by turning the same normally open loop on and off at 25 locations. Measurement values ​​were recorded before the loop, during a two-minute loop, and after the loop for 22 automatic voltage regulators, 28 automatic reclosers, a manual high-voltage air load switchgear with built-in earth fault direction detector, and an instantaneous excitation type high-voltage automatic switchgear with built-in earth fault direction detector.

[0071] First, the verification of the automatic voltage regulators will be explained with reference to Figures 12 to 14. In the voltage fluctuation verification shown in Figure 12, the primary and secondary voltages of the 22 automatic voltage regulators remained almost flat from before the loop to after the loop. The maximum voltage values ​​were 6800 [V] on the primary side and 105.9 [V] on the secondary side, and the minimum voltage values ​​were 6450 [V] on the primary side and 101.0 [V] on the secondary side, resulting in little fluctuation.

[0072] In the current transition verification shown in Figure 13, the current value in the automatic voltage regulator remained almost flat at around 100 [A], and only slight fluctuations were observed at points below 50 [A].

[0073] In the tap transition verification, of the 22 automatic voltage regulators, 21 were at the fourth tap or lower, and only one, the automatic voltage regulator TV3430, was at the fifth tap or higher. The automatic voltage regulator TV3430 did not meet the lockless criterion of 95% or higher for voltage regulation operation in the second support information display D02B shown in Figure 7, and was therefore an automatic voltage regulator that required confirmation in the output results of the second support information. In this way, it was confirmed that the tap position could be predicted appropriately, as expected from the output results of the support information.

[0074] Furthermore, three of the 22 units underwent tap operation during the loop, and the tap transitions for each are shown in Figure 14. Of these, automatic voltage regulator TV3430 is the automatic voltage regulator that was identified as requiring confirmation in the output results of the second support information, and because the primary voltage dropped from 6715 [V] before the loop to 6671 [V] during the loop, the voltage was increased by changing from the fifth tap before the loop to the sixth tap during the loop. This is because the test was conducted before the setting change, and since the reference voltage is high, it can be determined that the operation is normal.

[0075] The tap position of the automatic voltage regulator TV5427 shown in Figure 14 has been changed from the third tap before the loop to the fourth tap during the loop, boosting the voltage. Meanwhile, the primary voltage does not change significantly, from 6549 [V] before the loop to 6533 [V] during the loop, and the current value decreases from 59 [A] (phase angle: -36°) before the loop to 49 [A] (phase angle: -30°) during the loop. From this, it can be inferred that the voltage boost operation had already begun before the loop.

[0076] The tap position of the automatic voltage regulator TV7430 shown in FIG. 14 has been changed from the fourth tap before the loop to the third tap in the loop, resulting in a step-down. The primary voltage also remains unchanged, dropping from 6525 [V] before the loop to 6579 [V] during the loop. The current value only slightly decreased from 27 [A] (phase angle: -10°) before the loop to 13 [A] (phase angle: 104°) during the loop, but the phase angle changed from -10° (leading phase) to 104° (lagging phase), which is the reverse feed range. The reverse feed range is 85° or more. As a result, the automatic voltage regulator TV7430 performed a tap operation to the third tap using reverse feed tap control. Since the loop point had passed the automatic voltage regulator TV7430, it was determined that a reverse flow had occurred, and this was normal operation.

[0077] Next, we will explain the verification of the automatic recloser with reference to Figures 15 and 16. To verify the ratio to the set value, we obtained the measured ratios of the overcurrent relay set value and the ground fault detection set value, as shown in Figure 15. The ratio to the overcurrent relay set value was a maximum of 34%, a completely satisfactory result. The ratio to the ground fault detection set value was 53% for only one automatic recloser, the TR3423. The reason for the high ratio for the automatic recloser TR3423 is that when the tap position of the automatic voltage regulator TV3430 was changed from tap 5 before the loop to tap 6 during and after the loop, the zero-phase voltage value changed from 80 V to 100 V, and the set value was 190 V. The automatic voltage regulator TV3430 is the automatic voltage regulator that required verification in the output results of the second support information and is a V-connection automatic voltage regulator. In this case, since there is a margin of 90 [V] for the set value, it is thought that the circuit will not operate due to a ground fault detection.

[0078] As part of the verification of the margin for the setting, the margin for the overcurrent relay setting and the setting for ground fault detection were obtained, as shown in Figure 16. Three autoreclosers, TR6215, TR6920, and TR7506, had a margin for the overcurrent relay setting of 100 A or less. However, these three autoreclosers, TR6215, TR6920, and TR7506, all had an overcurrent relay setting of 100 A and a minimum margin of 66 A, which were acceptable results. Furthermore, these three autoreclosers, TR6215, TR6920, and TR7506, did not meet the lockless criterion for reclosing operation (100 A or more) in the fifth support information display D05 shown in Figure 10, and therefore were identified as requiring confirmation in the output results of the third and fifth support information. In this way, it was confirmed that the margin of the three-phase current values ​​could be appropriately predicted, as expected from the output results of the support information.

[0079] In verifying the zero-phase current value, the measured current value was 0 [A] for both a manual high-voltage air load switch with built-in earth fault direction detector and an instantaneous excitation type high-voltage automatic switch with built-in earth fault direction detector. The measurement specifications include a residual cancellation function that detects changes of 0.05 [A] or more. Since no such changes were detected, the results showed no problems.

[0080] To confirm the accuracy of the verified values, the ratios between the setting value ratio information included in the fourth support information and the actual measured values ​​differed as shown in Figure 17. The ratios of the three-phase current values ​​to the overcurrent relay setting and the zero-phase voltage values ​​to the setting for ground fault detection were both within approximately ±20%, confirming the high accuracy of the setting value ratio information included in the fourth support information. Of these, the actual measured values ​​for the ratio to the overcurrent relay setting tended to be higher than the estimated values ​​in the support information. The setting value ratio information is based on the maximum current value in a normal system. In contrast, the actual loop current is likely to be higher than in a normal system. However, the system has sufficient performance to obtain estimated values ​​with small discrepancies while reducing the effort required to estimate such loop currents. Furthermore, the actual measured values ​​for the ratio to the setting for ground fault detection tended to be lower than the estimated values ​​in the support information. This is due to the increased capacitance to earth in the loop system.

[0081] These verification results confirmed that there were no problems with voltage, current, or ground faults, and that lockless switching could be performed. Next, we will explain an example of verification in actual operation. In this example, lockless switching was performed in 12 actual Class A operations. Ten loop switching operations involved a combination of remote control and delegated operation, and two involved full remote control. Eleven of these 12 operations resulted in no problems. Only one case required investigation into the tap operation of the TV5521 automatic voltage regulator.

[0082] During the loop switching requiring investigation, the automatic voltage regulator TV5521 measured the tap position, primary voltage, secondary voltage, and current (phase angle) as shown in Figure 18. The tap position changed from the second tap before the loop to the fourth tap during the loop, and then to the second tap after the loop. The current phase angle changed from 62 [A] (phase angle: 314°) on the positive phase side before the loop to 41 [A] (phase angle: 168°) on the reverse phase side during the loop. The reverse phase side occurs when the phase angle is 85° or greater.

[0083] The automatic voltage regulator TV5521 was set to "not in use" for reverse tap control and voltage regulation direction. The loop point then moved from the secondary side to the primary side, and the infinite bus became the secondary side, resulting in a primary voltage regulation state. However, because the power flow direction could not be determined, tap operation continued with secondary voltage regulation. Since the secondary voltage did not change, a tap limit operation occurred, which repeatedly performed step-up tap operation. Therefore, when performing lockless switching, it is necessary to use the reverse tap control of the automatic voltage regulator.

[0084] Based on the above verification results, methods 1 to 4 can be determined as implementation methods for lockless switching. Method 1 applies to equipment that is forward both before and after loop switching. For equipment that is reversed after loop switching, basically, if it is an automatic voltage regulator, the tap is fixed, and if it is an automatic recloser, opening is prohibited. However, if the automatic voltage regulator can use reverse tap control, the fixing operation is not necessary.

[0085] The second implementation method is directed to an automatic voltage regulator that uses reverse tap control to prevent tap extreme operation when a loop is formed.

[0086] The third implementation method targets devices that are determined to be capable of lockless switching in the support information output by the information processing device 100. Devices that are determined to require confirmation or are not capable of lockless switching may be subject to lockless switching if no problems are found after a loop test, although this may require a fixation operation or the like. Furthermore, if a large-capacity load or a variable load is newly installed or if the system is changed, further consideration will be required.

[0087] The fourth implementation method is to manage the results by accumulating the locations where lockless switchover has been implemented. Note that locations where lockless switchover is not possible can be managed by notating them in the section management table or automation system diagram.

[0088] When the transient load or voltage fluctuation is large, conventional switching operations can be performed without relying on these implementation methods, or loop tap adjustment switching can be performed, in which the tap of the automatic voltage regulator is adjusted and switched during the loop.

[0089] An example of verification of the operational effects of the information processing device 100 according to this embodiment will be described. In this verification, the time from creating an operation form to completing the switching operation was measured for the cases where conventional loop switching was actually performed and where lockless switching was performed, and the two cases were compared. The locations where the switching test was performed were selected as the first and second feeders that form loops LP01 to LP03 that satisfy three pattern conditions corresponding to differences in the number of operating units (large, medium, small) as shown in FIG.

[0090] When the time was measured for each pattern, the average values ​​shown in Figure 20 were calculated. This shows that the time required for one Class A operation with conventional loop switching was 35 minutes 39 seconds, while with lockless switching it was 12 minutes 10 seconds. This resulted in a reduction of 23 minutes 29 seconds, making it possible to speed up the process by approximately three times.

[0091] At one electric power company, the average number of Class A operations recorded in statistics is 3,880 per year. Furthermore, a survey of Class A operation slips in a certain area revealed that 44% of loop switching operations involved operation of the automatic voltage regulator and automatic recloser, while 56% involved no operation. If this ratio were applied to the entire electric power company, conventional loop switching would require 1,454 hours, while lockless switching would be completed in approximately one-third of that time, at 786 hours. This would result in a savings of approximately 688 hours, which, at 7.4 hours of working time per day, would translate to a savings of approximately 90 days.

[0092] In this way, by using the information processing device 100 according to this embodiment, when performing loop switching in a power distribution system, it becomes easier to determine whether or not it is necessary to change the automatic voltage regulator or automatic reclosing device from its normal setting. Furthermore, since there are more cases where no changes are required, the time required to create and review an operation sheet can be shortened and the work content can be simplified.

[0093] The present invention is not limited to the above-described embodiments and may be modified and applied in various ways. In particular, the present invention is not limited to those having all of the technical features described in the above-described embodiments, but may have some of the configurations and functions described in the embodiments so as to solve at least one problem in the prior art. When a subordinate concept is described in the above-described embodiments, a generic concept invention using homologous or similar concepts, or a generic concept invention using common properties, is also included in the present invention and may have some of the structures and characteristics so as to solve at least one problem in the prior art.

[0094] The output of the support information is not limited to being displayed on a display device, but may be printed by a printing device, output as sound by an audio output device, or any other output that allows the user of the information processing device 100 to recognize the content of the support information. The support information is not limited to being output by the information processing device 100, but may be transmitted via electrical communication as a signal including the support information so that the support information can be output by a terminal device different from the information processing device 100.

[0095] The display content of the support information can be changed arbitrarily according to the specifications and programs of the information processing device 100, and for example, it may be possible to output and display only the evaluation information corresponding to the result of determining whether lockless switching is possible for one or both of an arbitrary automatic voltage regulator and an automatic reclosing device.

[0096] The voltage adjustment operation support process of Fig. 3 and the reclosing operation support process of Fig. 4 are not limited to processes that are executed in their entirety without stopping from the timing at which they are started, and some processes may be executed at different timings. For example, the process of aggregating measurement results related to the automatic voltage regulator and the automatic recloser using the voltage adjustment-related data 302 and the reclosing-related data 303 stored in the storage unit 111 may be executed at a first timing that occurs periodically, such as at a predetermined date and time or period. In contrast, the process of generating and outputting support information, such as some or all of the first to fifth support information, may be executed at a second timing, different from the first timing at which the process of aggregating measurement results is executed, in response to input of a predetermined generation command or output command when determining an operation procedure for performing loop switching in a power distribution system.

[0097] The functions of the information processing device 100 are not limited to those realized by a single device, but may be realized by multiple devices connected to each other so as to be able to communicate with each other. The measurement data 200 is not limited to being entirely stored in the storage unit 111 of the information processing device 100, but may be partially or entirely stored in an external storage device via a network and be obtainable by communication processing using the communication unit 115.

[0098] The information processing device 100 is not limited to a device in which the processing unit 112 executes the voltage adjustment operation support program 311 and the reclosing operation support program 312 included in the switching support program 301 stored in the memory unit 111, and for example, the functional configuration realized by some or all of the programs may be realized by hardware.

[0099] The information processing device 100 may be realized as a processing unit provided on a cloud as a computer using a processor. The voltage adjustment operation support process and the reclosing operation support process executed by the information processing device 100 are not limited to those realized by the processing unit 112 executing a program stored in the storage unit 111, but may be realized as the program itself or as a recording medium on which the program is recorded.

[0100] The program executable by the information processing device 100 may be stored and distributed on a non-transitory recording medium readable by a processing unit, such as a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), or an MO (Magneto-Optical Disk), and the program may be installed in the processing unit to configure a device capable of executing the processing of the above-described embodiments.

[0101] The above embodiments are merely examples, and the present invention is not limited to these. Various embodiments are possible within the scope of the invention as defined in the claims. The components described in the embodiments and variations can be freely combined. Furthermore, inventions equivalent to the inventions defined in the claims are also included in the present invention. In addition, even if the components of the inventions defined in the claims have the same names as the components described in the above embodiments, they are not limited to the components described in the above embodiments themselves, and can be modified and applied as appropriate. [Explanation of symbols]

[0102] 100 Information processing device 111 Storage section 112 Processing section 113 Output section 200 measurement data 301 Switching Support Program 321 Tap history data 322 Tap position measurement data 331 Three-phase current measurement data 332 Zero-phase voltage measurement data

Claims

1. a storage means for storing measurement data relating to one or both of a plurality of voltage regulators and reclosing devices installed in a power distribution system; a processing means for generating support information for loop switching of the power distribution system using the measurement data stored in the storage means; an output means for displayably outputting the support information generated by the processing means when determining the operation procedure for the loop switching; An information processing device comprising:

2. the processing means generates the support information including voltage adjustment evaluation information that can identify whether operation of the voltage adjustment device can be omitted using a ratio of tap positions in the voltage adjustment device and a predetermined voltage adjustment judgment criterion; The information processing device according to claim 1 .

3. the processing means generates the support information including reclosing evaluation information that can identify whether or not the operation of the reclosing device can be omitted, using one or both of the three-phase current values ​​and the zero-phase voltage values ​​in the reclosing device and a preset reclosing judgment criterion.

3. The information processing device according to claim 1.

4. The measurement data stored in the storage means is First measurement data indicating a history of tap operations in the voltage regulator corresponding to past loop switching; and second measurement data indicating a tap position in the voltage regulator measured at a tap position measurement timing, The processing executed by the processing means is a first process of aggregating a history of tap operations indicated by the first measurement data and generating first support information capable of identifying a proportion of tap operations in the voltage adjustment device; a second process of aggregating tap positions indicated by the second measurement data and generating second support information capable of identifying a proportion of tap positions in the voltage adjustment device; The output means outputs the first support information or the second support information generated by the processing means in a displayable manner. The information processing device according to claim 1 .

5. The first process generates the first support information including tap operation ratio information that can identify the ratio of each of the following cases of tap operation in the voltage adjustment device: no change in tap position, one tap down, two tap down, one tap up, and two tap up; The second process generates the second support information including tap position ratio information that can identify the ratio of tap positions included in a specific range and tap positions not included in the specific range among the tap positions in the voltage adjustment device. The information processing device according to claim 4 .

6. The measurement data stored in the storage means is The third measurement data indicates three-phase current values ​​and zero-phase voltage values ​​in the reclosing device measured at current and voltage measurement timings, The processing executed by the processing means is a third process of aggregating three-phase current values ​​and zero-phase voltage values ​​indicated by the third measurement data to generate third support information capable of identifying the distribution of each of the three-phase current values ​​and zero-phase voltage values; a fourth process of aggregating three-phase current values ​​and zero-phase voltage values ​​indicated by the third measurement data to generate fourth support information capable of identifying a ratio to a preset setting value; a fifth process of aggregating three-phase current values ​​and zero-phase voltage values ​​indicated by the third measurement data to generate fifth support information capable of identifying a margin for the setting value; the output means outputs the third support information, the fourth support information, or the fifth support information generated by the processing means in a displayable manner.

5. The information processing device according to claim 1.

7. the third processing generates, as the third support information, distributions of three-phase current values ​​and zero-phase current values ​​in the reclosing device, including measurement value distribution information that can be identified by a box-and-whisker plot; the fourth processing generates the fourth support information including first setting value ratio information capable of specifying a ratio of a maximum current value in a normal system among three-phase current values ​​in the reclosing device to a setting value of an overcurrent relay, and second setting value ratio information capable of specifying a ratio of a zero-phase sequence voltage value in a normal system among zero-phase sequence voltage values ​​in the reclosing device to a setting value for earth fault determination, The fifth process generates the fifth support information including first setting value margin width information capable of specifying a margin width for a setting value of an overcurrent relay for a maximum current value in a normal system among three-phase current values ​​in the reclosing device, and second setting value margin width information capable of specifying a margin width for a setting value for earth fault determination for a maximum voltage value in a normal system among zero-phase voltage values ​​in the reclosing device. The information processing device according to claim 6 .

8. An information processing method by an information processing device, generating support information for loop switching in a power distribution system using measurement data relating to one or both of a plurality of voltage regulators and reclosers installed in the power distribution system; When determining the operation content of the loop switching, the generated support information is output in a displayable manner. Information processing methods.

9. Computer, a storage means for storing measurement data relating to one or both of a plurality of voltage regulators and reclosing devices installed in the power distribution system; a processing means for generating support information for loop switching of the power distribution system using the measurement data stored in the storage means; an output means for displayably outputting the support information generated by the processing means when determining the operation content of the loop switching; A program that functions as a

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