JP2024075052A - Information Processing System - Google Patents

Abstract

To provide an information processing system capable of properly and easily outputting a report about relay operation of a protective relay device.SOLUTION: An information processing system includes a first protective relay device for protecting a power system by using an electricity amount obtained from the power system, and an information processing device that communicates with the first protective relay device. The first protective relay device receives first format information from the information processing device, identifies a first data group related to operation of a first relay element of the first protective relay device on the basis of the first format information when the first relay element is operated, and then transmits the first data group to the information processing device in response to a request from the information processing device. The information processing device creates a first report about operation of the first relay element on the basis of the first data group received from the first protective relay device, and outputs the first report.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to an information processing system including an information processing device and a protective relay device.

Conventionally, there is known a technique for creating a recording sheet on which the results of various tests performed on a protective relay device are recorded. For example, in JP 2000-232725 A (Patent Document 1), N pieces of partial format data are stored in a first ROM section, and n pieces of overall format data are stored in a second ROM section, and this data is selected by operating operation keys while looking at the display section, and one recording sheet is formed so that the measurement result data can be recorded.

JP 2000-232725 A

The technology disclosed in Patent Document 1 considers how to easily obtain a format for the record paper on which the results of protective relay device tests are recorded, in a manner that corresponds to a wide variety of tests. On the other hand, when the protective relay device actually detects a system fault (for example, when a relay element of the protective relay device operates), various information is collected for the purpose of analyzing the operation of the relay element, and a report is created that records the various information. Currently, highly skilled personnel (for example, maintenance personnel at a substation in charge of protective relay devices) create reports based on information obtained from the protective relay device. On the other hand, there is a problem in that it is difficult for less skilled personnel to properly create reports that include information necessary for the analysis of the operation of relay elements, etc.

The objective of one aspect of the present disclosure is to provide an information processing system that can appropriately and easily output reports regarding the relay operation of a protective relay device.

An information processing system according to one embodiment includes a first protective relay device for protecting a power system using an electrical quantity obtained from the power system, and an information processing device that communicates with the first protective relay device. The first protective relay device receives first format information from the information processing device, and when a first relay element of the first protective relay device operates, identifies a first data group related to the operation of the first relay element based on the first format information, and transmits the first data group to the information processing device in response to a request from the information processing device. The information processing device creates a first report on the operation of the first relay element based on the first data group received from the first protective relay device, and outputs the first report.

An information processing system according to another embodiment includes a first protective relay device for protecting a power system using an electrical quantity obtained from the power system, and an information processing device that communicates with the first protective relay device. When a first relay element of the first protective relay device operates, the information processing device identifies a first data group related to the operation of the first relay element based on the format information, requests the first data group from the first protective relay device, creates a first report on the operation of the first relay element based on the first data group received from the first protective relay device, and outputs the first report.

This disclosure makes it possible to appropriately and easily output reports regarding the relay operation of a protective relay device.

FIG. 1 illustrates an example of an overall configuration of an information processing system. 1 is a block diagram showing an example of a hardware configuration of a protective relay device; FIG. 11 is a sequence diagram showing an example of a processing procedure of the information processing system according to the first embodiment. FIG. 11 shows an example of a report according to the first embodiment. FIG. 11 is a sequence diagram showing an example of a processing procedure of an information processing system according to the second embodiment. FIG. 11 shows a report according to the second embodiment. FIG. 13 is a sequence diagram showing an example of a processing procedure of an information processing system according to a third embodiment.

Below, an embodiment of the present disclosure will be described with reference to the drawings. In the following description, identical parts are given the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

Embodiment 1.
<Overall composition>
Fig. 1 is a diagram showing an example of the overall configuration of an information processing system 1000. Referring to Fig. 1, protective relay devices 100A, 100B (hereinafter also collectively referred to as "protective relay devices 100") are digital protective relay devices installed, for example, inside a substation. In this embodiment, the protective relay device 100A acquires data on electrical quantities (e.g., current, voltage, etc.) related to a power transmission line L constituting a power system. The protective relay device 100A protects the power transmission line L by detecting an accident in the power system (e.g., the power transmission line L) using the electrical quantity data.

The protective relay device 100B, like the protective relay device 100A, collects data on the amount of electricity related to the power transmission line L. In other words, the protective relay device 100B is configured to obtain the same amount of electricity as the protective relay device 100A obtains from the power system.

Here, the same electrical quantity does not only mean that the electrical quantity is completely the same, but also includes that the electrical quantity is substantially the same. For example, as shown in FIG. 1, when the protective relay device 100A and the protective relay device 100B obtain electrical quantities from the same current transformer 2 and voltage transformer 4, the protective relay device 100A and the protective relay device 100B obtain completely the same electrical quantity.

On the other hand, in a power system (e.g., transmission line L), if another current transformer is provided on transmission line L near current transformer 2 (e.g., in the same substation), the current measured by the other current transformer is substantially the same as the current measured by current transformer 2. Similarly, if another voltage transformer is provided on transmission line L near voltage transformer 4, the voltage measured by the other voltage transformer is substantially the same as the voltage measured by voltage transformer 4. Therefore, when protective relay device 100B obtains an electrical quantity from such other current transformer and other voltage transformer, the electrical quantity is substantially the same as the electrical quantity obtained by protective relay device 100A from current transformer 2 and voltage transformer 4.

The protective relay device 100B may protect a protected object other than the protective relay device 100A (e.g., a transformer installed on the power transmission line L) based on the acquired electrical quantity data. Alternatively, the protective relay device 100B may be configured to protect the power transmission line L based on the electrical quantity data.

Inside the electric power station, protective relay devices 100A and 100B, a current transformer 2, a voltage transformer 4, and a circuit breaker 6 are installed. The current transformer 2 measures the current flowing through the power transmission line L. The voltage transformer 4 measures the voltage generated in the power transmission line L. The current data measured by the current transformer 2 and the voltage data measured by the voltage transformer 4 are input to the protective relay devices 100A and 100B.

The protective relay device 100A uses the collected electrical quantity data to perform relay calculations for fault detection and determine whether or not an fault has occurred in the power system (here, the transmission line L). When the protective relay device 100A detects an fault in the transmission line L, it outputs an opening command (e.g., a trip signal) to the circuit breaker 6. If only one of the current and the voltage is used for the relay calculation, the protective relay device 100A may be configured to take in the current or voltage required for the relay calculation. Typically, the protective relay device 100B uses the collected electrical quantity data to perform relay calculations for fault detection and determine whether or not an fault has occurred in another protected object (e.g., a transformer).

In addition, when the protective relay device 100A detects an accident (i.e., when the relay element operates), it transmits operation information indicating that the relay element has operated to the protective relay device 100B. Note that the protective relay device 100A may be configured to transmit the operation information to the information processing device 200.

The information processing device 200 is configured to be able to communicate with the protection relay devices 100A and 100B. The information processing device 200 creates various reports, for example, using information from the protection relay devices 100A and 100B.

<Hardware Configuration>
(Protection relay device)
2 is a block diagram showing an example of a hardware configuration of the protective relay device 100. The protective relay device 100 includes, as its hardware configuration, an auxiliary transformer 10, an A/D (Analog to Digital) conversion unit 20, and an arithmetic processing unit 30.

The auxiliary transformer 10 takes in electrical quantities from the current transformer 2 and the voltage transformer 4, converts them into voltage signals suitable for signal processing in the internal circuitry, and outputs them. The A/D conversion unit 20 takes in the electrical quantities (i.e., analog electrical quantities) output from the auxiliary transformer 10 and converts them into digital data. Specifically, the A/D conversion unit 20 includes filters 21 and 23, sample-and-hold circuits (corresponding to the SH circuits in the figure) 24 and 25, a multiplexer 26, and an A/D converter 27.

Filters 21 and 23 are analog filters that remove high-frequency noise components from the current and voltage waveform signals output from auxiliary transformer 10. The outputs of filters 21 and 23 are input to sample-and-hold circuits 24 and 25, respectively. Sample-and-hold circuits 24 and 25 sample the current and voltage waveform signals output from filters 21 and 23, respectively, at a predetermined sampling period.

Based on a timing signal input from the calculation processing unit 30, the multiplexer 26 sequentially switches the waveform signals input from the sample-and-hold circuits 24 and 25 in time series and outputs them to the A/D converter 27. The A/D converter 27 converts the waveform signals input from the multiplexer 26 from analog data to digital data. The A/D converter 27 outputs the digitally converted waveform signals to the calculation processing unit 30.

The calculation processing unit 30 is mainly composed of a microcomputer. Specifically, the calculation processing unit 30 includes a CPU (Central Processing Unit) 32, a ROM (Read Only Memory) 33, a RAM (Random Access Memory) 34, an auxiliary storage device 35, a DO (Digital output) circuit 36, a DI (Digital input) circuit 37, a display 38, an input interface 39, and a communication interface 40. These are connected by a bus 31.

The CPU 32 controls the protection relay device 100 by reading and executing a program previously stored in the ROM 33. The RAM 34 as a volatile memory and the ROM 33 as a non-volatile memory are used as the main memory of the CPU 32. The ROM 33 stores the program and setting values for signal processing, etc.

The CPU 32 takes in digital data from the A/D conversion unit 20 via the bus 31. The CPU 32 executes relay calculations for accident detection using the taken-in digital data in accordance with a program stored in the ROM 33. The CPU 32 determines whether an accident has occurred based on the results of each relay calculation.

When the CPU 32 detects an accident (i.e., when it determines that an accident has occurred), it outputs an opening command via the DO circuit 36 to the circuit breaker 6 installed in the power system to isolate the accident section from the power system.

The auxiliary storage device 35 is a storage device with a larger capacity than the ROM 33, and stores data such as electrical quantity data and setting values. The auxiliary storage device 35 is configured, for example, by a flash memory.

The DI circuit 37 receives, for example, a digital input signal that is a signal indicating the opening and closing information of the circuit breaker 6. In addition to the digital input signal from the circuit breaker 6, a digital input signal indicating the opening and closing information of a disconnector (not shown) may also be input to the DI circuit 37.

The display 38 is, for example, a liquid crystal display. The input interface 39 is typically a variety of buttons, etc., and accepts various operations from a user (e.g., an operator) of the protection relay device 100. The communication interface 40 mediates data transmission between the protection relay device 100 and the information processing device 200.

At least a part of the protective relay device 100 may be configured using circuits such as a field programmable gate array (FPGA) and an application specific integrated circuit (ASIC). At least a part of the protective relay device 100 may be configured using analog circuits.

(Information processing device)
The information processing device 200 can be realized as any device, regardless of type, as long as it is capable of executing the processes described below. For example, the information processing device 200 is a general-purpose computer that is mainly composed of a microcomputer and includes a CPU, memory (e.g., ROM, RAM, hard disk), a communication interface, etc.

<Processing Procedure>
Fig. 3 is a sequence diagram showing an example of a processing procedure of the information processing system according to embodiment 1. Various processes of the information processing device 200 in the sequence shown in Fig. 3 are mainly executed by the CPU of the information processing device 200, and various processes of the protection relay device 100A are mainly executed by the calculation processing unit 30 of the protection relay device 100A.

Referring to FIG. 3, the information processing device 200 transmits format information FM1 of a data group required for creating a report to the protection relay device 100A (step S10). The format information FM1 will be described in detail below.

The format information FM1 has various formats that indicate data items required to create various reports. For example, the protective relay device 100A includes a relay element X1 (e.g., a distance relay element) and a relay element X2 (e.g., a current differential relay element). The format information FM1 also includes formats fa1 to fc1.

Format fa1 is information describing the data items of data group Da1 required to create a report on the operation of relay element X1 when it operates. Format fb1 is information describing the data items of data group Db1 required to create a report on the operation of relay element X2 when it operates. Format fc1 is information describing the data items of data group Dc1 required to create a report on the operation of relay element X1 and relay element X2 when they operate.

The above data items are highly relevant to relay operation, and include the date and time of relay operation, LED (light-emitting diode) display information when the relay operated, system fault information (e.g., faulty phase, earth fault, short circuit, distance to the fault point, etc.), system electrical quantity information when the relay operated (e.g., effective current and voltage values), type of relay element that operated (e.g., distance relay element, current differential relay element), operation log of the DI circuit and DO circuit before and after relay operation, and PCM (pulse code memory) when the relay operated. modulation) transmission information (when the protective relay device 100 performs PCM transmission), effective value data of the input electrical quantity before and after relay operation (i.e., the electrical quantity input to the protective relay device 100A from the current transformer 2 and the voltage transformer 4), instantaneous value data of the input electrical quantity, the operation result of each relay element synchronized with the instantaneous value data (e.g., data indicating operation (ON) and recovery (OFF)), the output result of the DI circuit synchronized with the instantaneous value data, and the output result to the DO circuit synchronized with the instantaneous value data. Furthermore, the data items further include, as basic items, the relay type name, relay version information, relay installation location, relay setting value, and relay logic setting information.

Then, the protective relay device 100A detects a fault in the power system (step S12). That is, the relay element of the protective relay device 100A operates. Here, it is assumed that the relay element X1 operates.

When the relay element X1 operates, the protection relay device 100A identifies a data group Da1 related to the operation of the relay element X1 based on the format information FM1 received from the information processing device 200, and stores the data group Da1 in a non-volatile manner (step S14). Specifically, the protection relay device 100A selects a format fa1 corresponding to the operation of the relay element X1 from the format information FM1, and identifies the data group Da1 by checking the format fa1.

Here, in terms of memory capacity and writing time, the protective relay device 100A does not store all acquired data non-volatilely (for example, in the auxiliary storage device 35), but temporarily stores in the RAM 34 the date and time of relay operation, LED display information during relay operation, system fault status information, system electricity quantity information during relay operation, type of operated relay element, operation log of the DI circuit and DO circuit before and after relay operation, effective value data of the input electricity quantity before and after relay operation, instantaneous value data of the input electricity quantity, operation result of the relay element synchronized with the instantaneous value data, output result of the DI circuit synchronized with the instantaneous value data, output result to the DO circuit synchronized with the instantaneous value data, etc. Therefore, when the power supply of the protective relay device 100A is turned off, the data stored in the RAM 34 is lost. In order to prevent such data loss, the protective relay device 100A stores the data temporarily stored in the RAM 34 from the data group Da1 in the auxiliary storage device 35. In addition, data from data group Da1, such as the relay type name and relay version information, is stored in a non-volatile manner in ROM 33 from the time of shipment of the protection relay device 100A.

The protection relay device 100A transmits operation information indicating that the relay element X1 has operated to the information processing device 200 (step S16). The protection relay device 100A is also configured to transmit the operation information to the protection relay device 100B.

Based on the received operation information, the information processing device 200 requests the protective relay device 100A for data required to create a report (step S18). Note that if a user of the information processing device 200 (e.g., a system operator) recognizes that the protective relay device 100A has detected an accident (i.e., has operated the relay) by some other method (e.g., an operation alarm of the circuit breaker 6, etc.), he/she may operate the information processing device 200 to execute a data request.

In response to a data request from the information processing device 200, the protection relay device 100A transmits data group Da1 to the information processing device 200 (step S20).

The information processing device 200 creates an operation report regarding the operation of the relay element X1 based on the data group Da1 received from the protection relay device 100A (step S22), and outputs the operation report (step S24). For example, the information processing device 200 may display the operation report on the display 38, or output the operation report to an external device via the communication interface 40. The information processing device 200 may be configured to print out the operation report using a printer (not shown).

<Operation report>
Fig. 4 is a diagram showing an example of a report according to the first embodiment. Referring to Fig. 4, the report 510 is an operation report created when the distance relay element of the protective relay device 100A operates. The report 510 includes a relay type name, a relay version, logic setting information, a relay setting value, oscilloscope data, other relay acquisition information (e.g., information acquired by the protective relay device 100B), log data, data collection date and time, relay operation date and time, installation location, protected object, other relay information, CT, VT rating, relay operation element, LED display, data at the time of the accident, data before the accident, etc. The oscilloscope data includes instantaneous value data of the input electric quantity, operation results of the relay element synchronized with the instantaneous value data, output results of the DI circuit, and output results to the DO circuit.

Since the logic setting information, relay setting values, oscilloscope data, and other relay data are large in volume, each may be listed on a separate page, or a URL (Uniform Resource Locator) for accessing each piece of data may be provided.

The log data related to the DI circuit 36 and the DO circuit 37 includes the time when each event occurred. For example, on August 15, 2022, "data save activation" occurs at time ta, "relay operation" occurs at time tb, "trip signal output" occurs at time tc, and "circuit breaker opening information reception" occurs at time td. The circuit breaker opening information is information indicating that the circuit breaker 6 has been opened.

The data collection time is the time when data (e.g., data group Da1) from the protective relay device 100A is collected by the information processing device 200. The installation location of the protective relay device 100A is "X substation" and the object to be protected is "power transmission line L." The "other relay" in the protective relay device 100A is the protective relay device 100B.

The current transformer and voltage transformer applied to the protective relay device 100B are "CT1" and "VT1", respectively. These are the same as the current transformer and voltage transformer applied to the protective relay device 100A. Also, in this example, the a-phase earth fault distance relay element of the protective relay device 100A is operating, and the same information indicating an earth fault as the LED display provided on the front of the protective relay device 100A is displayed.

The data at the time of the accident includes current data (e.g., each phase current Ia, Ib, Ic and zero-phase current 3I0) and voltage data (e.g., each phase voltage Va, Vb, Vc and zero-phase voltage 3V0) as data of electrical quantities acquired by the protective relay device 100A when the relay element X1 is operating. The data at the time of the accident further includes the distance to the accident point (e.g., 5 km) and the operation time from the occurrence of the accident until the relay element X1 operates (e.g., 40 ms). The data from a specified time before the accident (i.e., data before the accident) includes current data (e.g., each phase current Ia1, Ib1, Ic1 and zero-phase current 3I01) and voltage data (e.g., each phase voltage Va1, Vb1, Vc1 and zero-phase voltage 3V01).

<Advantages>
According to the first embodiment, during relay operation of the protective relay device 100A, an operation report including information necessary for operation analysis is automatically created. Therefore, an operation report regarding the relay operation of the protective relay device 100A can be output appropriately and easily. For example, even a person with low proficiency can display an appropriate operation report or transmit it to another device. In particular, in the case of a protective relay device having multiple relay elements inside a relay such as line protection, transformer protection, or busbar protection, it was difficult to create an operation report unless the person fully understood the relay controlled by complex logic. However, according to the first embodiment, even a person with low proficiency can create an appropriate operation report.

Embodiment 2.
In the first embodiment, a configuration has been described in which the information processing device 200 creates an operation report based on information acquired by the protection relay device 100A. In the second embodiment, a configuration has been described in which the information processing device 200 creates an operation report based on information acquired by the protection relay devices 100A and 100B. The <system configuration> and <hardware configuration> of the second embodiment are the same as those of the first embodiment.

<Processing Procedure>
Fig. 5 is a sequence diagram showing an example of a processing procedure of the information processing system according to the embodiment 2. Referring to Fig. 5, each process of steps S10 to S20 is similar to each process described in Fig. 3, and therefore detailed description thereof will not be repeated.

The information processing device 200 transmits format information FM2 of the data group required for creating the report to the protection relay device 100B (step S30). The format information FM2 has a format fa2 indicating the data items of the data group to be transmitted to the information processing device 200 when operation information is received from the protection relay device 100A.

The above data items include the date and time when the operation information was received, system electrical quantity information when the operation information was received (e.g., effective values of current and voltage), operation logs of the DI circuit and DO circuit before and after receiving the operation information, effective value data of the input electrical quantity before and after receiving the operation information, instantaneous value data of the input electrical quantity, operation results of the relay element synchronized with the instantaneous value data, output results of the DI circuit synchronized with the instantaneous value data, output results to the DO circuit synchronized with the instantaneous value data, etc. Furthermore, the data items include basic items such as the relay type name, relay version information, relay installation location, relay setting value, relay logic setting information, etc.

The format information FM2 may have the same format as the format information FM1. For example, the protective relay device 100B includes relay elements Y1 and Y2. In this case, the format information FM2 may have a format that describes the data items of the data group required to create a report on the operation of the relay elements Y1 and Y2.

The protection relay device 100A transmits operation information indicating that a relay element (e.g., relay element X1) has operated to the protection relay device 100B (step S32). Based on the format information FM2 received from the information processing device 200, the protection relay device 100B identifies a data group Da2 to be transmitted to the information processing device 200 when the operation information indicating that the relay element X1 has operated is received, and stores the data group Da2 in a non-volatile manner (step S34). Specifically, the protection relay device 100B selects a format fa2 from the format information FM2 that corresponds to the time when the operation information of the relay element X1 is received, and identifies the data group Da2 by checking the format fa2.

Based on receiving the operation information from the protection relay device 100A, the information processing device 200 requests the protection relay device 100B for data required to create a report (step S36). In response to the data request from the information processing device 200, the protection relay device 100B transmits data group Da2 to the information processing device 200 (step S38).

The information processing device 200 creates an operation report regarding the operation of the relay element X1 based on the data group Da1 received from the protection relay device 100A and the data group Da2 received from the protection relay device 100B (step S40), and outputs the created operation report (step S44).

<Operation report>
Fig. 6 is a diagram showing a report according to the embodiment 2. In the example of Fig. 6, it is assumed that the protective relay device 100B is a current differential relay for protecting a transformer A.

Referring to FIG. 6, report 520 is created based on a data group (e.g., data group Da2) received from protection relay device 100B. Specifically, information processing device 200 creates report 510 shown in FIG. 4 based on a data group (e.g., data group Da1) received from protection relay device 100A, and creates report 520 shown in FIG. 6 based on a data group received from protection relay device 100B. Thus, information processing device 200 creates a combination of report 510 and report 520 as an operation report.

The report 520 includes the relay type name, relay version, logic setting information, relay setting value, oscilloscope data, other relay acquired information (e.g., information acquired by the protective relay device 100A), log data, data collection date and time, date and time of receipt of operation information, installation location, protected object, CT, VT rating, data at the time of receipt of operation information, data before receipt of operation information, etc.

Logic setting information, relay setting values, oscilloscope data, and other relay data are the same as those explained in Figure 4.

The data collection date and time is the date and time when the information processing device 200 collected data (e.g., data group Da2) from the protective relay device 100B. The installation location of the protective relay device 100B is "X substation" and the protected object is "transformer A."

The data at the time of receiving the operation information includes current data (e.g., each phase current Ia, Ib, Ic and zero-phase current 3I0) and voltage data (e.g., each phase voltage Va, Vb, Vc and zero-phase voltage 3V0) as data of electrical quantities acquired by the protective relay device 100B at the time of receiving the operation information. Data from a specified time before the time of receiving the operation information (i.e., data before receiving the operation information) includes current data (e.g., each phase current Ia1, Ib1, Ic1 and zero-phase current 3I01) and voltage data (e.g., each phase voltage Va1, Vb1, Vc1 and zero-phase voltage 3V01).

As described above, the protective relay device 100B is configured to acquire the same amount of electricity as that acquired by the protective relay device 100A. Here, for example, if the difference between the electrical quantity data described in the "accident data" described in the report 510 of FIG. 4 and the electrical quantity data described in the "data at the time of receiving operation information" described in the report 520 of FIG. 6 is within the input error range of the relay, and the difference between the electrical quantity data described in the "pre-accident data" and the electrical quantity data described in the "data before receiving operation information" is within the input error range of the relay, it can be determined that the input electrical quantity data is normal.

In addition, if the relay elements of the protective relay device 100B are the same as the relay elements of the protective relay device 100A, detailed relay operation analysis (e.g., whether or not the relay operation is malfunctioning) can be performed by comparing the log data and oscilloscope data recorded in each report 510, 520.

<Advantages>
According to the second embodiment, the report 520 is created based on the data acquired by the protection relay device 100B. Therefore, it is possible to obtain information useful for analyzing the operation of the relay elements of the protection relay device 100A.

Embodiment 3.
In the third embodiment, the relay element of the protective relay device 100A does not operate, but when a change in the amount of electricity in the power system is detected, the information processing device 200 creates a detection report. The system configuration and hardware configuration of the third embodiment are the same as those of the first embodiment.

<Processing Procedure>
7 is a sequence diagram showing an example of a processing procedure of the information processing system according to the third embodiment. In the following description, it is assumed that the relay element of the protection relay device 100A does not operate. With reference to FIG. 7, the information processing device 200 transmits format information FM1 of a data group required for creating a report to the protection relay device 100A (step S10).

In the third embodiment, the format information FM1 further includes the format fd1 in addition to the above formats fa1 to fc1. The format fd1 is information that describes the data items of the data group Dd1 that are necessary for creating a report on the detection when a change in the electrical quantity of the power system is detected even though the relay element of the protective relay device 100A is not operating.

The information processing device 200 transmits format information FM2 of the data group required for creating the report to the protection relay device 100B (step S30). In the third embodiment, the format information FM2 has a format fb2 indicating the data items of the data group Db2 to be transmitted to the information processing device 200 when a detection signal is received from the protection relay device 100A.

The protective relay device 100A detects a change in the electrical quantity of the power system (e.g., power transmission line L) (step S50). Specifically, if the current electrical quantity data (i.e., current data or voltage data) is G(t), the electrical quantity data 180 electrical degrees ago is G(t-180°). If no accident has occurred in the power system, the AC voltage and AC current are constant, so the sum of G(t) and G(t-180°) is zero. On the other hand, if an accident has occurred in the power system, the sum is no longer zero.

Therefore, the protective relay device 100A determines that a change in the amount of electricity has been detected when the condition |G(t) + G(t-180°)| > ε is satisfied. Specifically, the protective relay device 100A may determine that a change in the amount of electricity has been detected when the above condition is satisfied for either the current data or the voltage data, or may determine that a change in the amount of electricity has been detected when the above condition is satisfied for both the current data and the voltage data. The threshold value ε is set to a higher sensitivity than the sensitivity of the setting value for the relay operation. As a result, even if the fault current is small and the relay does not operate, a change in the amount of electricity may be detected. On the other hand, when the relay operates, a change in the amount of electricity is also detected.

Next, based on the format information FM1, the protection relay device 100A identifies the data group Dd1 to be transmitted to the information processing device 200 when the relay element is inoperative and a change in the amount of electricity is detected, and stores the data group Dd1 in a non-volatile manner (step S52). The protection relay device 100A selects the format fd1 from the format information FM1, and identifies the data group Dd1 by checking the format fd1.

The protective relay device 100A transmits a detection signal indicating that a change in the amount of electricity has been detected to the information processing device 200 (step S54). That is, when the protective relay device 100A detects that the relay element is not operating and that the amount of electricity has changed by more than a specified value, it transmits the detection signal to the information processing device 200.

Based on the reception of the detection signal, the information processing device 200 requests the protective relay device 100A for data required to create a report (step S56). Note that when a user of the information processing device 200 (e.g., a system operator) recognizes by some other method that the protective relay device 100A has detected a change in the amount of electricity, the user may operate the information processing device 200 to execute a data request. In response to the data request from the information processing device 200, the protective relay device 100A transmits the data group Dd1 to the information processing device 200 (step S58).

Meanwhile, the protection relay device 100A transmits the detection signal to the protection relay device 100B (step S60). Based on the format information FM2, the protection relay device 100B identifies the data group Db2 to be transmitted to the information processing device 200 when the detection signal is received, and stores the data group Db2 in a non-volatile manner (step S62). Specifically, the protection relay device 100B selects the format fb2 from the format information FM2, and identifies the data group Db2 by checking the format fb2. Based on the reception of the detection signal, the information processing device 200 requests the protection relay device 100B for data required to create a report (step S64). In response to the data request from the information processing device 200, the protection relay device 100A transmits the data group Db2 to the information processing device 200 (step S66).

Then, the information processing device 200 creates a detection report regarding the detection of a change in the amount of electricity based on the data group Dd1 received from the protective relay device 100A and the data group Db2 received from the protective relay device 100B (step S68), and outputs the created detection report (step S70).

<Detection Report>
The information processing device 200 creates a report K1 based on the data group Dd1 received from the protection relay device 100A, and creates a report K2 based on the data group Db2 received from the protection relay device 100B. Then, the information processing device 200 creates a detection report by combining the report K1 and the report K2.

Report K1 includes the relay type name, relay version, logic setting information, relay setting value, oscilloscope data, other relay data, log data, data collection time, detection date and time, installation location, protected object, CT and VT ratings, data at the time of detection, data before detection, etc. Report K2 includes the relay type name, relay version, logic setting information, relay setting value, oscilloscope data, other relay data, log data, data collection time, detection signal reception date and time, installation location, protected object, CT and VT ratings, data at the time of detection signal reception, data before detection signal reception, etc.

<Advantages>
According to the third embodiment, when a change in the electric quantity is detected in the protective relay device 100A while the relay is not in operation, a detection report is automatically created based on a group of data from the protective relay device 100A and a group of data from the protective relay device 100B. Such a detection report can be used to analyze the cause of whether or not the relay element of the protective relay device 100A is malfunctioning.

Other embodiments.
(1) In the above embodiment, the configuration in which the format information is transmitted in advance from the information processing device 200 to the protection relay devices 100A and 100B has been described, but the present invention is not limited to this configuration. For example, the information processing device 200 may be configured not to transmit the format information to the protection relay devices 100A and 100B.

When the relay element of the protection relay device 100A operates (for example, when operation information indicating that the relay element X1 has operated is received), the information processing device 200 identifies a data group Da1 related to the operation of the relay element X1 based on the format information FM1. The information processing device 200 requests the data group Da1 from the protection relay device 100A and receives the data group Da1 from the protection relay device 100A. The information processing device 200 creates an operation report on the operation of the relay element X1 based on the received data group Da1, and outputs the operation report.

In this case, in order to prevent data temporarily stored in RAM 34 or the like from being lost when the power supply to the protection relay device 100A is turned off, it is preferable that the protection relay device 100A store all acquired data in a non-volatile manner.

(2) In the above-described embodiment, the information processing device 200 may be configured to perform the same relay calculation as the relay element of the protective relay device 100A based on information (e.g., instantaneous value data of the input electric quantity before and after relay operation and the output result of the DI circuit synchronized with the instantaneous value data) contained in a data group (e.g., data group Da1) acquired from the protective relay device 100A when the relay element of the protective relay device 100A operates. In this case, the information processing device 200 determines whether the operation result of the relay element and the result of the logic sequence calculation by the relay calculation match the operation result of the relay element and the result of the logic sequence calculation by the protective relay device 100A. For example, it is assumed that an application capable of performing the same relay calculation as the relay element of the protective relay device 100A is pre-installed in the information processing device 200.

For ease of explanation, it is assumed that the relay element X1 of the protection relay device 100A operates as described in FIG. 3. Below, the processing procedure of the information processing device 200 will be explained along the flow of FIG. 3. First, the information processing device 200 receives the data group Da1 transmitted from the protection relay device 100A in step S20 of FIG. 3.

Then, the information processing device 200 performs the same relay calculation as the relay element X1 of the protective relay device 100A based on the instantaneous value data of the input electrical quantity before and after relay operation included in the data group Da1 and the output result of the DI circuit synchronized with the instantaneous value data. Note that, depending on the type of relay element, the output result of the DI circuit may not be necessary. In addition, the relay calculation includes a relay element calculation and a logic sequence calculation.

The information processing device 200 judges whether the result of the executed relay calculation (hereinafter also referred to as "relay calculation result Za") is the same as the relay calculation result data of the relay element X1 based on the instantaneous value data of the input electric quantity and the output result of the DI circuit synchronized with the instantaneous value data (hereinafter also referred to as "relay calculation result Zb"). The relay calculation result Zb included in the data group Da1 is the relay calculation result (e.g., the result of the relay element calculation and the result of the logic sequence calculation) obtained by the relay element X1 executing the relay calculation based on the electric quantity data acquired by the protective relay device 100A.

For example, the information processing device 200 determines whether the relay calculation result Za and the relay calculation result Zb are the same by comparing whether the result of the relay element calculation (i.e., the operation result of the relay element) and the result of the logic sequence calculation match between the relay calculation results Za and Zb. If the result of the relay element calculation and the result of the logic sequence calculation match between the relay calculation results Za and Zb, the information processing device 200 determines that the relay calculation result Za and the relay calculation result Zb are the same.

Then, in step S22 of FIG. 3, the information processing device 200 creates an operation report on the operation of the relay element X1 based on the data group Da1 received from the protection relay device 100A. The created operation report further includes, in addition to the contents described in the operation report as shown in FIG. 4, a determination result as to whether the relay calculation result Za and the relay calculation result Zb are identical. Note that, if these are not identical, the operation report may also include the contents of the difference between the relay calculation result Za and the relay calculation result Zb.

By checking the operation report including the judgment result, the user of the information processing device 200 (e.g., a system operator) can judge whether or not the calculation processing unit 30 of the protection relay device 100A has performed a correct calculation. For example, if the relay calculation result Za and the relay calculation result Zb do not match, it can be recognized that an abnormality may have occurred in the calculation processing unit 30.

(3) The configurations exemplified as the above-mentioned embodiments are examples of the configurations of the present disclosure, and may be combined with other known technologies, or may be modified, such as by omitting some parts, without departing from the spirit of the present disclosure. In addition, the above-mentioned embodiments may be implemented by appropriately adopting the processes and configurations described in other embodiments.

The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present disclosure is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

Various aspects of this disclosure are summarized below as appendices.

(Appendix 1)
An information processing system comprising: a first protective relay device for protecting a power system using an electrical quantity obtained from the power system; and an information processing device that communicates with the first protective relay device, wherein the first protective relay device receives first format information from the information processing device, and when a first relay element of the first protective relay device operates, identifies a first data group related to the operation of the first relay element based on the first format information and transmits the first data group to the information processing device in response to a request from the information processing device, and the information processing device creates a first report on the operation of the first relay element based on the first data group received from the first protective relay device, and outputs the first report.

(Appendix 2)
The information processing system according to claim 1, wherein the first protection relay device non-volatilely stores the identified first data group.

(Appendix 3)
The information processing system according to claim 1 or 2, wherein the first protection relay device transmits operation information indicating that the first relay element has operated to the information processing device.

(Appendix 4)
The information processing system according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the first data group includes information indicating the first relay element, an operation date and time of the first relay element, and data on an electrical quantity acquired by the first protective relay device when the first relay element is in operation.

(Appendix 5)
The information processing system according to any one of Supplementary Note 1 to Supplementary Note 4, further comprising a second protective relay device that communicates with the information processing device, wherein the second protective relay device is configured to acquire an amount of electricity identical to the amount of electricity acquired by the first protective relay device from the power system, wherein the first protective relay device transmits, when the first relay element operates, operation information indicating that the first relay element has operated to the second protective relay device, wherein the second protective relay device receives second format information from the information processing device, and, when receiving the operation information, identifies a second data group to be transmitted to the information processing device upon reception of the operation information based on the second format information and transmits the second data group to the information processing device in response to a request from the information processing device, and the information processing device creates the first report based on the first data group received from the first protective relay device and the second data group received from the second protective relay device.

(Appendix 6)
The information processing system according to claim 5, wherein the second protection relay device non-volatilely stores the identified second data group.

(Appendix 7)
The information processing system according to claim 5 or 6, wherein the second data group includes a reception date and time when the second protection relay device received the operation information from the first protection relay device, and data on an electrical quantity of the power system acquired by the second protection relay device at the time of receiving the operation information.

(Appendix 8)
The power system further includes a second protective relay device that communicates with the information processing device, and the second protective relay device is configured to acquire an electric quantity that is the same as the electric quantity acquired by the first protective relay device from the power system, and when the first relay element is inoperative and the first protective relay device detects that the electric quantity of the power system has changed by a specified value or more, the first protective relay device transmits a detection signal indicating the detection to the second protective relay device, identifies a third data group to be transmitted to the information processing device when the change in the electric quantity is detected based on the first format information, and transmits the third data group to the information processing device in response to a request from the information processing device. the second protection relay device receives second format information from the information processing device, and, when receiving the detection signal, identifies a fourth data group to be transmitted to the information processing device upon reception of the detection signal based on the second format information and transmits the fourth data group to the information processing device in response to a request from the information processing device, and the information processing device creates a second report regarding the detection of the change in the electrical quantity based on the third data group received from the first protection relay device and the fourth data group received from the second protection relay device.

(Appendix 9)
The information processing system described in any of Supplementary Note 1 to Supplementary Note 8, wherein the first data group includes electrical quantity data acquired by the first protective relay device before and after operation of the first relay element and a relay calculation result of the first relay element based on the electrical quantity data, the information processing device executes the same relay calculation as the first relay element based on the electrical quantity data, and determines whether or not a result of the executed relay calculation is the same as a result of the relay calculation of the first relay element, and the first report includes a result of the determination.

(Appendix 10)
1. An information processing system comprising: a first protective relay device for protecting a power system using an electrical quantity obtained from the power system; and an information processing device that communicates with the first protective relay device, wherein when a first relay element of the first protective relay device operates, the information processing device identifies a first data group related to the operation of the first relay element based on format information, requests the first data group from the first protective relay device, creates a first report on the operation of the first relay element based on the first data group received from the first protective relay device, and outputs the first report.

2 Current transformer, 4 Voltage transformer, 6 Circuit breaker, 10 Auxiliary transformer, 20 A/D conversion section, 21, 23 Filter, 24, 25 Sample and hold circuit, 26 Multiplexer, 27 A/D converter, 30 Arithmetic processing section, 31 Bus, 32 CPU, 33 ROM, 34 RAM, 35 Auxiliary storage device, 36 DO circuit, 37 DI circuit, 38 Display, 39 Input interface, 40 Communication interface, 100A, 100B Protection relay device, 200 Information processing device, 1000 Information processing system.

Claims (10)

A first protective relay device for protecting the power system by using an amount of electricity acquired from the power system;
An information processing device that communicates with the first protection relay device,
The first protection relay device is
receiving first format information from the information processing device;
If a first relay element of the first protection relay device is operated, identifying a first group of data related to the operation of the first relay element based on the first format information;
Transmitting the first data group to the information processing device in response to a request from the information processing device;
The information processing device includes:
generating a first report regarding operation of the first relay element based on the first set of data received from the first protection relay device;
An information processing system that outputs the first report. The information processing system according to claim 1, wherein the first protective relay device stores the identified first data group in a non-volatile manner. The information processing system according to claim 1 or 2, wherein the first protection relay device transmits operation information indicating that the first relay element has operated to the information processing device. The information processing system according to claim 1 or 2, wherein the first data group includes information indicating the first relay element, an operation date and time of the first relay element, and data on an electrical quantity acquired by the first protective relay device when the first relay element is in operation. Further comprising a second protection relay device that communicates with the information processing device,
The second protection relay device is configured to acquire an amount of electricity that is the same as the amount of electricity that the first protection relay device acquires from the power system,
The first protection relay device is
When the first relay element is operated, transmitting operation information indicating that the first relay element is operated to the second protection relay device;
The second protection relay device is
receiving second format information from the information processing device;
When the motion information is received, identifying a second data group to be transmitted to the information processing device when the motion information is received based on the second format information;
Transmitting the second data group to the information processing device in response to a request from the information processing device;
The information processing device includes:
3. The information processing system according to claim 1, wherein the first report is generated based on the first data group received from the first protection relay device and the second data group received from the second protection relay device. The information processing system according to claim 5, wherein the second protection relay device stores the identified second data group in a non-volatile manner. The information processing system according to claim 5, wherein the second data group includes a reception date and time when the second protective relay device received the operation information from the first protective relay device, and data on the amount of electricity in the power system acquired by the second protective relay device at the time of receiving the operation information. Further comprising a second protection relay device that communicates with the information processing device,
The second protection relay device is configured to acquire an amount of electricity that is the same as the amount of electricity that the first protection relay device acquires from the power system,
The first protection relay device is
When detecting that the first relay element is inoperative and that the electrical quantity of the power system has changed by a specified value or more, transmitting a detection signal indicating the detection to the second protective relay device;
identifying a third data group to be transmitted to the information processing device when a change in the electrical quantity is detected based on the first format information;
Transmitting the third data group to the information processing device in response to a request from the information processing device;
The second protection relay device,
receiving second format information from the information processing device;
when the detection signal is received, identifying a fourth data group to be transmitted to the information processing device upon receiving the detection signal based on the second format information;
transmitting the fourth data group to the information processing device in response to a request from the information processing device;
The information processing device includes:
3. The information processing system according to claim 1, further comprising: a second report regarding detection of a change in the electrical quantity based on the third data group received from the first protective relay device and the fourth data group received from the second protective relay device. The first data group includes data of an electric quantity acquired by the first protection relay device before and after the operation of the first relay element, and a relay calculation result of the first relay element based on the data of the electric quantity,
The information processing device includes:
executes the same relay calculation as that of the first relay element based on the data of the electrical quantity;
determining whether a result of the executed relay calculation is the same as a result of the relay calculation of the first relay element;
The information processing system according to claim 1 , wherein the first report includes a result of the determination. A first protective relay device for protecting the power system by using an amount of electricity acquired from the power system;
An information processing device that communicates with the first protection relay device,
The information processing device includes:
If a first relay element of the first protection relay device is operated, identifying a first group of data related to the operation of the first relay element based on the format information;
Requesting the first data group from the first protection relay device;
generating a first report regarding operation of the first relay element based on the first set of data received from the first protection relay device;
An information processing system that outputs the first report.

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