JPWO2013118295A1 - Distribution system fault detection system and distribution system fault detection method - Google Patents

Abstract

A first measuring device that measures a first electric quantity of a first device that is a measurement target, and a second electric quantity that is measured at a predetermined position upstream of the position of the first device on the power distribution system A distribution system including a second measurement device that performs measurement and a third measurement device that measures a third quantity of electricity at a predetermined position on the distribution system downstream of the position of the first device. A distribution system failure detection device capable of acquiring the amount of electricity measured by the device includes a storage unit, a first amount of electricity from the first measuring device, a second amount of electricity from the second measuring device, and a third amount. An electric quantity acquisition unit that acquires the third electric quantity from each of the measuring devices and stores the third electric quantity in the storage unit; A fault determination unit for determining whether or not the first device is faulty, and a distribution system fault detection system comprising: .

Description

  The present invention relates to a distribution system failure detection system and a distribution system failure detection method.

  A distribution system that transmits electric power generated at a power plant to each consumer that consumes the electric power includes a plurality of voltage adjusting devices for controlling the voltage. Conventionally, many voltage regulators are not connected to a center server that manages a power distribution system through a communication network. Therefore, the center server cannot detect a failure of many voltage adjusting devices. For this reason, it has been studied to install a slave station in the voltage regulator and connect the voltage regulator and the center server via a slave network via the slave station. However, even with this configuration, when the slave station fails, the center server cannot detect the failure of the voltage regulator.

  Therefore, Patent Literature 1 discloses a configuration in which a monitoring device is provided in each of a switch, a transformer, a measuring instrument, and the like (hereinafter referred to as “device”) in a power distribution system. The monitoring device monitors the operating status of the device and periodically transmits the status information to the center server. When the center server has successfully communicated the status information from a certain device, the center server determines whether or not a certain device has failed based on the status information. When the center server cannot normally receive the status information from a certain device, the center server identifies the fault occurrence section in the feeder line based on the status information from the device existing on the feeder line on the distribution substation side of the device.

JP 2008-148413 A

  In Patent Document 1, when a failure occurs in the communication network between the center server and the monitoring device, the center server cannot determine whether there is a failure in the device monitored by the monitoring device.

  An object of the present invention is to provide a distribution system failure detection system capable of detecting the occurrence of a failure or failure in a device of the distribution system, and a method for detecting a failure in the distribution system.

  Another object of the present invention is that even if a failure occurs in the communication network between the distribution system failure detection device and the distribution system device, the distribution system failure can detect the occurrence of a failure or failure in the device. It is an object of the present invention to provide a detection system and a method for detecting a failure in a distribution system.

  A distribution system failure detection system for detecting a failure in a distribution system according to an embodiment of the present invention is a plurality of measurement devices capable of measuring an electrical quantity that is a value related to electricity of a plurality of devices installed in the distribution system. And a distribution system failure detection device capable of acquiring the amount of electricity measured by the plurality of measuring devices, wherein the plurality of devices include a first device to be measured, and a plurality of measurements The apparatus includes a first measuring device that measures a first electric quantity of the first device, and a second electric quantity that is measured at a predetermined position upstream of the position of the first device on the power distribution system. And a third measuring device that measures a third amount of electricity at a predetermined position on the downstream side of the distribution system with respect to the position of the first device. The power distribution system failure detection device includes a storage unit, a first electrical quantity from the first measurement device, a second electrical quantity from the second measurement device, and a third electrical quantity from the third measurement device. Whether or not the first device is malfunctioning based on the second and third electric quantities when the electric quantity obtaining unit and the first electric quantity that can be obtained and stored in the storage unit cannot be obtained. A failure discriminating unit for discriminating whether or not.

  In a preferred embodiment, the failure determination unit has no failure in the first device when both the second electric quantity and the third electric quantity are within a normal range, and When it is determined that a failure has occurred in the communication network between the first measurement device and the distribution system failure detection device, and either the second electric quantity or the third electric quantity is not within a normal range It may be determined that a failure has occurred in the first device and that a failure has also occurred in the communication network between the first measurement device and the distribution system failure detection device.

FIG. 1 is a schematic diagram showing a configuration of a power distribution system failure detection system according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an example of a hardware configuration of the power distribution system failure detection device 400. FIG. 3 is a block diagram showing an example of a hard-wire configuration of the slave station 100 FIG. 4 is a block diagram illustrating an example of a functional configuration of the power distribution system failure detection device 400. FIG. 5 is a diagram illustrating an example of a data table held in the measurement history DB 430. FIG. 6 is a diagram illustrating an example of a data table held by the index history DB 440. FIG. 7 is a diagram illustrating an example of a data table held by the voltage adjustment device master DB 450. FIG. 8 is a diagram illustrating an example of a data table held by the detection condition DB 460. FIG. 9 is a graph showing an example of the relationship between the amount of electricity and the index value. FIG. 10 is a flowchart illustrating an example of processing in the index calculation unit 410. FIG. 11 is a flowchart illustrating an example of processing in the failure determination unit 420.

  In the power distribution system, the present invention determines whether or not a failure has occurred in a certain measurement target device by measuring the state of a device in the vicinity of the measurement target device. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a configuration of a power distribution system failure detection system according to an embodiment of the present invention. The power distribution system failure detection system 1 includes a power distribution system failure detection device (hereinafter referred to as “failure detection device”) 400, voltage regulators 700a and 700b, a switch 800, and slave stations 100a to 100d. The voltage adjusting device 700 and the switch 800 are installed on the distribution line 110. The slave station 100 is connected to the voltage regulator 700 and the switch 800, respectively. Each slave station 100 and the failure detection apparatus 400 are connected by a communication network 500.

  The communication network 500 is a network that can transmit and receive data bidirectionally. The communication network 500 may be either wired or wireless.

  The slave stations 100a to 100d monitor and control the switch 800 or the voltage regulators 700a and 700b. Hereinafter, the slave stations 100a to 100d may be collectively referred to as the slave station 100, and the voltage adjustment devices 700a and 700b may be collectively referred to as the voltage adjustment device 700. The slave station 100 transmits the amount of electricity measured by the switch 800 to the failure detection device 400. The amount of electricity is a value related to power, such as voltage, current, active power, or reactive power. The electric quantity may be any one of these values, or may be a value calculated from a plurality of these values. The slave station 100 transmits the control amount in the voltage adjustment device 700 to the failure detection device 400. The control amount is, for example, a value related to a tap ratio of LRT (Load Ratio Control Transformer) or SVR (Step Voltage Regulator), or a reactive power supply amount of SVC (Static Var Compensator).

  The slave station 100 b is connected to the voltage adjustment device 700. The slave stations 100a and 100c are connected to the switches 800a and 800c, respectively. When viewed from the slave station 100b, the slave station 100c exists next to the distribution substation 600 side (hereinafter referred to as “upstream side”). When viewed from the slave station 100b, the slave station 100a is adjacent to the opposite side of the distribution substation (hereinafter referred to as “downstream side”).

  The failure detection apparatus 400 receives information on the amount of electricity measured by the switches 800a and 800c from the slave stations 100a and 100c connected to the switches 800a and 800c, respectively. The failure detection device 400 receives control amount information from the slave station 100b connected to the voltage regulator 700b. The failure detection device 400 detects the presence or absence of failure of the voltage regulator 700 based on information such as the amount of electricity and the amount of control. Details of the failure detection apparatus 400 will be described later.

  The voltage adjusting device 700 is a device that adjusts the voltage of the distribution line 110. The voltage adjustment device 700 is, for example, an LRT, SVR, or SVC.

  The switch 800 is a device that opens and closes the electrical path of the distribution line 110. The switch 800 has a function of measuring the amount of electricity passing through the device.

  FIG. 2 is a block diagram illustrating an example of a hardware configuration of the power distribution system failure detection device 400. The failure detection device 400 includes, for example, a CPU (Central Processing Unit) 401, a memory 402, a storage device 403, a communication interface (hereinafter referred to as “I / F”) 404, and a display unit 405. These elements 401 to 405 are connected by a bus 406 capable of bidirectional data transmission / reception.

  The CPU 401 executes processing included in a computer program (hereinafter referred to as “program”) to realize various functions to be described later. The CPU 401 reads the program from the storage device 403 and executes it.

  The memory 402 holds data that is temporarily required when a program is executed by the CPU 401. The memory 402 is composed of, for example, a DRAM (Dynamic Random Access Memory).

  The storage device 403 holds a program, data that is permanently required when the program is executed, and the like. The storage device 403 includes, for example, an HDD (Hard Disk Drive), a flash memory, or the like.

  A communication I / F 404 is connected to the communication network 500 and controls data transmission / reception with other computers or management terminals. The communication I / F 404 is configured by, for example, a NIC (Network Interface Card).

  The display unit 405 displays, for example, whether or not a failure has occurred in the voltage adjustment device 700 and the communication network 500 that connects the voltage adjustment device 700 and the failure detection device 400. The display unit 405 may include a first display unit 405a that displays the fact when the voltage regulator 700 is out of order. Furthermore, the display unit 405 may include a second display unit 405b that displays that when the communication network 500 connecting the voltage regulator 700 and the failure detection device 400 is out of order. As a result, the administrator confirms the first display unit 405a and the second display unit 406b, so that the voltage adjustment device 700 and the communication network 500 that connects the device 700 and the failure detection device 400 can be checked. It is possible to recognize whether a failure has occurred (or both). The display unit 405 is configured by, for example, a display device or a light device.

  FIG. 3 is a block diagram illustrating an example of a hard-wire configuration of the slave station 100. The slave station 100 includes, for example, a CPU 101, a memory 102, a storage device 103, and a communication I / F 104. The elements 101 to 104 are connected by a bus 105 capable of bidirectional communication. Since the function of each element 101-105 is the same as that of each element 401-405 demonstrated using the said FIG. 2, description is abbreviate | omitted.

  FIG. 4 is a block diagram illustrating an example of a functional configuration of the power distribution system failure detection device 400.

  The failure detection apparatus 400 includes, for example, an index calculation unit 410, a failure determination unit 420, a measurement history database (hereinafter referred to as “DB”) 430, an index history DB 440, a voltage adjustment device master DB 450, and a detection condition DB 460. Have.

  The measurement history DB 430 manages data measured by the slave station 100. Hereinafter, data managed in the measurement history DB 430 will be described.

  FIG. 5 is a diagram illustrating an example of a data table held in the measurement history DB 430. The measurement history DB 430 includes, for example, a slave station number 430a, a measurement amount 430b, and a date and time 430c as record fields.

  The slave station number 430 a is a number that can uniquely identify the slave station 100 and is assigned to each slave station 100. The measured amount 430b is a value related to the amount of electricity or the control amount measured by the slave station 100 corresponding to the slave station number 430a. The date and time 430c is the date and time when the slave station 100 corresponding to the slave station number 430a measured the measurement amount.

  For example, the record 4300 is measured for the slave station 100 whose slave station number 430a is “0000100”. The record 4300 indicates that the measured amount is “6400” and the measured date is “November 23, 2010, 10:00:00”. Returning to the description of FIG.

  The index history DB 440 manages the index value calculated from the amount of electricity acquired when no failure has occurred in the voltage regulator 700 and when no failure has occurred in the communication network 500. That is, the index history DB 440 manages an index value calculated from the amount of electricity acquired when both the voltage regulator 700 and the communication network 500 are normal. Hereinafter, data managed in the index history DB 440 will be described.

  FIG. 6 is a diagram illustrating an example of a data table held by the index history DB 440. The index history DB 440 includes, for example, a voltage adjustment device number 440a, an upper limit index value 440b, and a lower limit index value 440c as record fields.

  The voltage regulation device number 440a is a number that can uniquely identify the voltage regulation device 700, and is assigned to each voltage regulation device 700. The upper limit index value 440b and the lower limit index value 440c are determined based on the maximum value and the minimum value of the amount of electricity in a certain period of the voltage adjustment device 700 corresponding to the voltage adjustment device number 440a. Details of this processing will be described later. Returning to the description of FIG.

  The voltage adjustment device master DB 450 manages the correspondence between the voltage adjustment device 700 and the slave station 100 connected to the voltage adjustment device 700.

  FIG. 7 is a diagram illustrating an example of a data table held by the voltage adjustment device master DB 450. The voltage adjustment device master DB 450 has a voltage adjustment device number 450a and a slave station number 450b as record fields. The description of the voltage adjustment device number 450a and the slave station number 450b is the same as described above, and will be omitted.

  For example, the record 4500 indicates that the slave station 100 whose slave station number 450b is “0000200” is connected to the voltage regulator 700 whose voltage regulator device number 450a is “002”. Returning to the description of FIG.

  The detection condition DB 460 manages a threshold for the failure detection device 400 to determine whether or not the voltage regulator 700 or the like has a failure.

  FIG. 8 is a diagram illustrating an example of a data table held by the detection condition DB 460. The detection condition DB 460 has, for example, a threshold value 460a as a record field.

  The threshold value 460a is a value for the failure detection apparatus 400 to determine whether or not a failure has occurred in the voltage regulator 700 or the like. Details of the determination method will be described later. Returning to the description of FIG.

  The index calculation unit 410 receives an amount of electricity or a control amount from the slave station 100. For example, the index calculation unit 410 performs the following (Process 1) and (Process 2).

  (Processing 1) When the index calculation unit 410 can normally communicate with the slave station 100, the index calculation unit 410 calculates an index value based on the amount of electricity or the control amount received from the slave station 100. Then, the index calculation unit 410 registers the calculated index value in the index history DB 440.

  (Process 2) When the indicator calculation unit 410 cannot communicate with the slave station 100 normally, the number of the voltage regulator 700 corresponding to the slave station 100 and the switch 800 adjacent to the voltage regulator 700 are measured. The amount of electricity is provided to the failure determination unit 420.

  Hereinafter, an example of the processing related to the (processing 1) of the index calculation unit 410 will be described with reference to FIGS. 1 and 5.

  The index calculation unit 410 identifies the slave station number “0000100” of the slave station 100a adjacent to the downstream side of the slave station 100b. Then, the index calculation unit 410 acquires all records corresponding to the slave station 100a from the measurement history DB 430 using the slave station number “0000100” of the slave station 100a as a search key. For example, it is assumed that the measurement amounts of all the acquired records are “6400”, “6350”, and “6565”, respectively (records 4300, 4301, and 4302 in FIG. 5). The index calculation unit 410 specifies the maximum value “6565” and the minimum value “6350” in the measured amount of the acquired record group. The index calculation unit 410 registers the maximum value “6565” as the upper limit index value and the minimum value “6350” as the lower limit index value in the index history DB 440.

  Hereinafter, an example of the process related to (Process 2) of the index calculation unit 410 will be described with reference to FIGS. 1 and 5.

  The index calculation unit 410 identifies the switches 800a and 800c located on both sides of the voltage adjustment device 700b corresponding to the slave station 100b that cannot communicate normally. Then, the index calculation unit 410 acquires the amount of electricity measured by the adjacent switches 800a and 800c near the time when communication could not be performed normally. For example, if the time when communication was not successful was “10:20”, the amount of electricity measured by the switch 800a near that time is “6565” (record 4302 in FIG. 5), and the switch The amount of electricity measured at 800c is “6465” (record 4310 in FIG. 5). The index calculation unit 410 obtains the number “002” of the voltage regulator 700b that has not been able to communicate normally, the amount of electricity “6565” measured by the switch 800a, and the amount of electricity “6465” measured by the switch 800c. To the failure determination unit 420. Returning to the description of FIG.

  The failure determination unit 420 acquires from the index calculation unit 410 the number of the voltage adjustment device 700b that has failed to communicate normally and the amount of electricity measured at the switches 800a and 800c adjacent to the voltage adjustment device 700b. The failure determination unit 420 acquires the upper limit index value and the lower limit index value of each of the adjacent switches 800a and 800c from the index history DB 440. For each of the adjacent switches 800a and 800c, the failure determination unit 420 includes the electrical quantities of the switches 800a and 800c provided from the index calculation unit 410, the upper limit index values of the switches 800a and 800c acquired from the index history DB 440, and Compare the lower index value. Then, the failure determination unit 420 determines whether or not the voltage adjustment device 700b that has not been able to communicate normally has failed based on the comparison result.

  For example, the failure determination unit 420 acquires a failure determination threshold value from the detection condition DB 460. When the amount of electricity in the switches 800a and 800c is larger than the value obtained by adding the threshold value to the upper limit index value or smaller than the value obtained by subtracting the threshold value from the lower limit index value, the voltage regulator 700b fails. It is determined that there is a possibility. In other words, the failure determination unit 420 determines that there is a possibility that the voltage regulator 700 has failed when the difference between the amount of electricity and the upper limit index value or the lower limit index value is greater than the threshold value.

  The failure determination unit 420 may determine that there is a possibility that the voltage regulator 700b has failed when the above failure determination is positive in either of the adjacent switches 800a and 800c. Alternatively, the failure determination unit 420 may determine that there is a possibility that the voltage regulator 700b has failed only when both of the adjacent switches 800a and 800c are positive in the above failure determination. The threshold value may be different for the upper limit index value and the lower limit index value.

  FIG. 9 is a graph showing an example of the relationship between the amount of electricity and the index value. Hereinafter, an example of processing performed by the failure determination unit 420 when the control amount cannot be received from the voltage regulator 700b around 11:00 will be described with reference to FIG.

  The failure determination unit 420 receives the amount of electricity “6660” measured in the vicinity of “11:00” in the switch 800 a from the index calculation unit 410. The failure determination unit 420 obtains the upper limit index value “6565” of the switch 800a from the index history DB 440. The failure determination unit 420 acquires the threshold “10” from the detection condition DB 460. The failure determination unit 420 determines whether or not the electric quantity “6660” received from the index calculation unit 410 is larger than “6575” obtained by adding the threshold “10” to the upper limit index value “6565”. Here, since the electric quantity “6660” is larger than “6575”, the failure determination unit 420 determines that there is a possibility that the voltage regulator 700b has failed.

  FIG. 10 is a flowchart illustrating an example of processing in the index calculation unit 410. Hereinafter, the processing flow of the index calculation unit 410 will be described with reference to FIG.

  The index calculation unit 410 performs an initialization process (S4101). For example, the index calculation unit 410 acquires the voltage adjustment device number 450a and the slave station number 450b from the voltage adjustment device master DB 450 and stores them in the memory. The index calculation unit 410 acquires the threshold value 460a from the detection condition DB 460 and stores it in the memory. The index calculation unit 410 receives the amount of electricity or the amount of control transmitted from the slave stations 100a to 100c (S4102).

  When the amount of electricity or control amount cannot be received from the slave station 100b (S4103: NO), the index calculation unit 410 and the switch on both sides of the voltage adjustment device 700b that could not be received and the voltage adjustment device 700b that could not be received. The amount of power measured by 800a and 800c is provided to the failure determination unit 420 (S4107). The index calculation unit 410 ends this process (END).

  When the amount of electricity or control amount can be received from the slave station 100b (S4013: YES), the index calculation unit 410 registers the amount of electricity or control amount received from the slave station 100b in the measurement history DB 430 (S4104). The index calculation unit 410 calculates an index value from the amount of electricity or control amount registered in the measurement history DB 430 (S4105). When the index value needs to be updated, the index calculation unit 410 registers and updates the calculated index value in the index history DB 440 (S4106), and ends the processing (END).

  FIG. 11 is a flowchart illustrating an example of processing in the failure determination unit 420. Hereinafter, the processing flow of the failure determination unit 420 will be described with reference to FIG.

  When the failure determination unit 420 receives from the index calculation unit 410 the number of the voltage adjustment device 700b and the electric energy measured by the switches 800a and 800c adjacent to the voltage adjustment device 700b (S4201), the failure determination unit 420 performs the subsequent processing. Run.

  The failure determination unit 420 acquires the upper limit index value 440b and the lower limit index value 440c of the adjacent switches 800a and 800c from the index history DB 440 (S4202).

  The failure determination unit 420 determines whether or not the amount of electricity is greater than a value obtained by adding the threshold value 460a to the upper limit index value 440b or a value obtained by subtracting the threshold value 460a from the lower limit index value 440c. (S4203).

  If the determination in step S4203 is negative (S4203: NO), failure determination unit 420 determines that voltage regulator 700 is normal (S4204), and ends the process (END).

  If the determination in step S4203 is affirmative (S4203: YES), the failure determination unit 420 determines that the voltage regulator 700 may be defective (S4205), and ends the process (END). ).

  As a result of the above processing, the failure detection apparatus 400 cannot acquire the control amount of the voltage adjustment device 700b due to a failure in the communication network 500b with the slave station 100b connected to the voltage adjustment device 700b. However, it can be determined whether or not a failure has occurred in the voltage regulator 700b.

  In other words, the failure detection device 400 has a failure in both the communication network 500b and the voltage regulator 700b, or is the voltage regulator 700b normal and a failure only in the communication network 500b? Can be distinguished.

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

  For example, in the system configuration of FIG. 1, the voltage adjustment device 700b and the failure detection device 400 may be directly connected by the communication network 500b, or only the slave station 100b and the failure detection device 400 adjacent to the voltage adjustment device 700b. May be tied.

  The voltage regulator 700b is not limited to SVR, but may be LRT or SVC. When the voltage regulator 700b is SVC, the following processing may be performed in step S4105 of FIG. For example, even if the index value is calculated based on the voltage fluctuation range in a predetermined period in the amount of electricity acquired from the slave station 100 arranged on the feeder line on the terminal side or the distribution substation side as viewed from the SVC good.

Failure detection is not limited to detection based on measurement data during normal operation. For example, the failure may be detected by the following method.
(Step 1) The failure detection device 400 issues a tap command to the voltage adjustment device 700 (for example, LRT) existing upstream of the target device for failure determination. At this time, if the target device is normal, a tap command is issued to the voltage adjusting device 700 so that the target device performs a tap operation.
(Step 2) If the voltage of the target device is boosted by one tap as a result of Step 1, it is determined to be normal, and if it does not change, it is determined to be a failure.

This embodiment can also be expressed as a computer program invention as follows, for example.
"A computer program for causing a computer to function as a power distribution system failure detection device for detecting a power distribution system failure,
The distribution system is provided with a plurality of devices and a plurality of measuring devices capable of measuring an amount of electricity that is a value related to electricity of the plurality of devices,
The plurality of devices include a first device to be measured,
The plurality of measuring devices include a first measuring device that measures a first electric quantity of the first device, and a predetermined position on the upstream side of the distribution system from the position of the first device. A second measuring device that measures the second quantity of electricity, and a third measuring device that measures the third quantity of electricity at a predetermined position on the downstream side of the distribution system from the position of the first device. And
The first electrical quantity is acquired from the first measurement device, the second electrical quantity is obtained from the second measurement device, and the third electrical quantity is obtained from the third measurement device and stored. A memory step;
A failure determination step of determining whether or not the first device has failed based on the second amount of electricity and the third amount of electricity when the first amount of electricity cannot be acquired; A computer program to be executed. "

“A computer program for causing a computer to function as a power distribution system failure detection device for detecting a failure in a plurality of devices installed in the power distribution system,
The first electric quantity that is a value related to the electricity of the first device that is one of the plurality of devices, and the first amount that is installed at a predetermined position on the upstream side of the distribution system from the position of the first device. The second amount of electricity of the second device and the third amount of electricity of the third device installed at a predetermined position downstream of the position of the first device on the power distribution system are respectively acquired. Steps,
If the first amount of electricity cannot be acquired, the step of determining whether or not the first device has failed based on the second amount of electricity and the third amount of electricity is executed in the computer. Computer program to let you. "

  100a, 100b, 100c, 100d ... Slave station, 400 ... Distribution system failure detection device, 700a, 700b ... Voltage regulator, 800a, 800c ... Switch

Claims (8)

A system for detecting a fault in a distribution system,
A plurality of measuring devices capable of measuring the amount of electricity, which is a value related to the electricity of a plurality of devices installed in the distribution system;
A distribution system failure detection device capable of acquiring the quantity of electricity measured by a plurality of the measurement devices, and
The plurality of devices include a first device to be measured,
The plurality of measuring devices include a first measuring device that measures a first electric quantity of the first device, and a predetermined position on the upstream side of the distribution system from the position of the first device. A second measuring device that measures the second quantity of electricity, and a third measuring device that measures the third quantity of electricity at a predetermined position on the downstream side of the distribution system from the position of the first device. And
The power distribution system failure detection device,
A storage unit;
The first electric quantity is obtained from the first measuring device, the second electric quantity is obtained from the second measuring device, and the third electric quantity is obtained from the third measuring device, respectively. An electric quantity acquisition unit to be stored in the storage unit;
A failure determination unit that determines whether the first device has failed based on the second amount of electricity and the third amount of electricity when the first amount of electricity cannot be acquired; System failure detection system.
The failure determination unit
When both the second electric quantity and the third electric quantity are within a normal range, no failure has occurred in the first device, and the first measuring device and the It is determined that a failure has occurred in the communication network with the power distribution system failure detection device,
If either the second electric quantity or the third electric quantity is not within a normal range, a failure has occurred in the first device, and the first measuring device and the power distribution system It is determined that a failure has occurred in the communication network with the failure detection device.
The power distribution system failure detection system according to claim 1.
The power distribution system failure detection device,
The maximum value and minimum value of the second electric quantity and the maximum value and minimum value of the third electric quantity during the period in which the first device is operating normally are stored in the storage unit, respectively. In addition, an amount of electricity between a value larger than the maximum value by a predetermined value and a value smaller than the minimum value by a predetermined value, an index calculation unit that sets the normal amount within the normal range,
The distribution system failure detection system according to claim 2, further comprising:
The power distribution system failure detection device,
In the first case where a failure has not occurred in the first device and a failure has occurred only in the communication network, a failure has occurred in the first device, and A display unit capable of displaying in a distinguishable manner from the second case in which a failure has occurred in the communication network between the first measurement device and the distribution system failure detection device;
The distribution system failure detection system according to claim 3, further comprising:
The first device is configured as a device capable of adjusting the voltage of the distribution system,
The distribution system failure detection system according to claim 4.
A method for detecting a fault in a distribution system,
The power distribution system is provided with a plurality of devices and a plurality of measuring devices capable of measuring an amount of electricity that is a value related to electricity of the plurality of devices,
The plurality of devices include a first device to be measured,
The plurality of measuring devices include a first measuring device that measures a first electric quantity of the first device, and a predetermined position on the upstream side of the distribution system from the position of the first device. A second measuring device that measures the amount of electricity of 2, and a third measuring device that measures the third amount of electricity at a predetermined position on the distribution system downstream of the position of the first device. And
Distribution system failure detection device capable of acquiring the amount of electricity measured by a plurality of the measurement devices,
Obtaining and storing the first electric quantity from the first measuring device, the second electric quantity from the second measuring device, and the third electric quantity from the third measuring device, respectively. A memory step to
A failure determination step of determining whether or not the first device is out of order based on the second amount of electricity and the third amount of electricity when the first amount of electricity cannot be acquired. System failure detection method.
A distribution system failure detection device that detects a failure of a plurality of devices installed in a distribution system,
A storage unit;
The first electric quantity that is a value related to the electricity of the first device that is one of the plurality of devices, and the first amount that is installed at a predetermined position on the upstream side of the distribution system from the position of the first device. A second amount of electricity of the second device, and a third amount of electricity of the third device installed at a predetermined position downstream of the position of the first device on the power distribution system, respectively. An electric quantity acquisition unit stored in the storage unit,
A failure determination unit that determines whether the first device has failed based on the second amount of electricity and the third amount of electricity when the first amount of electricity cannot be acquired; System fault detection device.
A power distribution system failure detection method for detecting a failure of a plurality of devices installed in a power distribution system,
The first electric quantity that is a value related to the electricity of the first device that is one of the plurality of devices, and the first amount that is installed at a predetermined position on the upstream side of the distribution system from the position of the first device. The second amount of electricity of the second device and the third amount of electricity of the third device installed at a predetermined position downstream of the position of the first device on the power distribution system are respectively acquired. Steps,
A distribution system failure comprising: a step of determining whether or not the first device has failed based on the second amount of electricity and the third amount of electricity if the first amount of electricity cannot be obtained Detection method.

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