KR20220074708A - Protection relay device - Google Patents

Abstract

The protection relay device for protecting an electric power system is provided with the relay calculating part which performs relay calculation based on electricity quantity data and setting data, and the setting part which sets setting data. When the operation test of a protective relay device is started, a setting part sets the 1st setting data at the time of an operation test as setting data used for relay calculation. Based on the completion of the operation test, the setting unit changes the setting data used for the relay calculation from the first setting data to the second setting data at the time of operation for monitoring the electric power system.

Description

Protective relay {PROTECTION RELAY DEVICE}

The present disclosure relates to a protective relay device.

Conventionally, in order to stabilize the operation of the power system, a protection relay device for detecting an accident occurring in the power system is used. The protective relay device detects the occurrence of an accident by comparing a setting value with an amount of electricity such as current and voltage collected from the power system, and outputs a trip signal to the circuit breaker. Typically, the setting value used for determination of a system accident is set by a user (for example, a system operator) based on facilities of an electric power system. For example, Japanese Patent Laid-Open No. 2014-3820 discloses a digital protection control device for flexibly editing group setting values composed of a group of setting values.

In a protective relay device, in order to confirm the soundness of the function, an operation test is performed regularly. In the operation test, the protective relay device is separated from the power system during operation, and an input simulating the voltage and current at the time of a grid accident is applied to the protective relay device from the dedicated test device, so that the protective relay device responds desired. check what is shown. The setting value of the protective relay device at the time of the operation test is not the same as the setting value at the time of normal operation in many cases.

Therefore, before the operation test, the operation setting value is stored as electronic data or the like, the setting value applied to the protective relay device is changed to the test setting value, and the operation test is performed. And the setting value applied to the protective relay device is returned to the stored setting value at the time of operation after completion|finish of an operation test. In the case of a protective relay device of a composite element, a plurality of setting items exist, and a change operation of the setting value for each setting item is generally performed by a human. Therefore, there is a possibility that a human error such as forgetting to return the setting value applied to the protective relay device to the setting value at the time of operation may occur after the operation test is completed.

An object of the present disclosure is to provide a protective relay device capable of automatically setting a setting value during operation as a setting value applied to the protective relay device after completion of the operation test.

According to one embodiment, a protection relay device for protecting a power system is provided. A protection relay device is provided with the relay calculating part which performs relay calculation based on electric quantity data and setting data, and the setting part which sets setting data. When the operation test of a protective relay device is started, a setting part sets the 1st setting data at the time of an operation test as setting data used for relay calculation. Based on the completion of the operation test, the setting unit changes the setting data used for the relay calculation from the first setting data to the second setting data at the time of operation for monitoring the electric power system.

These and other objects, features, aspects and advantages of this invention will become apparent from the following detailed description of this invention, taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of the whole structure of a protection relay device.
It is a figure which shows an example of the setting data at the time of operation|use and an operation test.
It is a flowchart which shows an example of the setting process of a setting value.
It is a figure for demonstrating the flow of the change of setting data.
Fig. 5 is a diagram showing an example of a screen for restoring a setting value.
6 is a diagram showing another example of a screen for restoring a setting value.
7 is a block diagram showing an example of a functional configuration of a protective relay device.

EMBODIMENT OF THE INVENTION Hereinafter, this embodiment is demonstrated, referring drawings. In the following description, the same code|symbol is attached|subjected to the same component. Such names and functions are also the same. Accordingly, detailed descriptions thereof are not repeated.

<Overall composition>

1 is a diagram showing an example of the overall configuration of the protection relay device 100 . Referring to FIG. 1 , the protection relay device 100 is a digital type protection relay device, and is, for example, installed inside an electric power station. In the present embodiment, the protection relay device 100 collects, for example, data on the amount of electricity (eg, current, voltage, etc.) related to the power transmission line L constituting the power system, and adds the data to the amount of electricity. Based on the power system (eg, the transmission line (L)) is protected.

A protective relay device 100 , an instrument current transformer 2 , an instrument transformer 4 , and a circuit breaker 6 are installed inside the electric station. The instrument current transformer 2 measures the current flowing through the power transmission line L. The instrument transformer (4) measures the voltage generated in the transmission line (L). The current data measured by the instrument current transformer 2 and the voltage data measured by the instrument transformer 4 are input to the protection relay device 100 .

The protection relay device 100 determines whether a system accident has occurred by executing a relay operation necessary to protect the power system using the collected electricity quantity data. When the protective relay device 100 detects an accident in the power transmission line L, it outputs an open command (for example, a trip signal) to the circuit breaker 6 . In addition, when only either one of a current and a voltage is used for a relay calculation, the protective relay device 100 may be comprised so that the current or voltage required for a relay calculation may be acquired.

Specifically, the protection relay device 100 includes, as a hardware configuration, an auxiliary transformer 10 , an analog to digital (AD) conversion unit 20 , and an arithmetic processing unit 30 .

The auxiliary transformer 10 acquires the electric quantity from the instrument current transformer 2 and the instrument transformer 4, converts it into a voltage signal suitable for signal processing in an internal circuit, and outputs it. Incidentally, at the time of the operation test, the connection between the instrument current transformer 2 and the instrument transformer 4 and the protective relay device 100 is cut off, and instead the protective relay device 100 and the test device 110 are disconnected. ) is connected. In this case, the auxiliary transformer 10 acquires the amount of electricity (eg, current and voltage) input from the test device 110 , converts it into a voltage signal, and outputs it.

The AD converter 20 acquires an electric quantity (ie, an analog electric quantity) output from the auxiliary transformer 10 and converts it into digital data. Specifically, the AD converter 20 includes filters 21 and 23 , sample and hold circuits (corresponding to the SH circuit in the drawing) 24 and 25 , a multiplexer 26 , and an AD converter 27 . do.

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

The sample-and-hold circuits 24 and 25 sample the waveform signals of current and voltage output from the filters 21 and 23, respectively, at a predetermined sampling period. Based on the timing signal input from the arithmetic processing unit 30, the multiplexer 26 sequentially converts the waveform signals input from the sample and hold circuits 24 and 25 in time series and inputs them to the AD converter 27 .

The AD converter 27 converts the waveform signal input from the multiplexer 26 from analog data to digital data. The AD converter 27 outputs the digitally converted waveform signal to the arithmetic processing unit 30 .

The arithmetic processing unit 30 is constituted mainly by a microcomputer. Specifically, the arithmetic processing unit 30 includes a CPU (Central Processing Unit) 32 , a ROM (Read Only Memory) 33 , a RAM 34 , an auxiliary storage device 35 , and a DO (Digital Output). ) circuit 36 , a digital input (DI) circuit 37 , a display 38 , and an input interface (IF) 39 . These are coupled by a bus 31 .

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

Specifically, the CPU 32 acquires digital data from the AD converter 20 via the bus 31 . The CPU 32 executes a relay operation using the acquired digital data in accordance with the program stored in the ROM 33 . The CPU 32 determines the presence or absence of an accident in the protection section (that is, the area to be protected) based on the relay operation result.

When the CPU 32 detects an accident (eg, when the current value exceeds a set value), the CPU 32 is installed in the power system to separate the fault section from the power system through the DO circuit 36 . An open command is output to the circuit breaker (6).

The auxiliary storage device 35 is a storage device having a larger capacity than the ROM 33 , and stores data such as a program, an electric quantity detection value, a setting value, and the like. The auxiliary storage device 35 is constituted by, for example, a hard disk, a flash memory, or the like. For example, the auxiliary storage device 35 includes various data at the time of operation (hereinafter also simply referred to as “operation”) for monitoring the power system, and various data at the time of testing the operation of the protection relay device 100 . remember

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

The display 38 is, for example, a liquid crystal display or the like. The input interface 39 is typically various buttons or the like, and receives various operations from a user (eg, a system operator).

In addition, at least a part of the protection relay device 100 may be configured using circuits such as an FPGA (Field Programmable Gate Array) and an ASIC (Application Specific Integrated Circuit). In addition, at least a part of the protection relay device 100 may be configured by an analog circuit.

Moreover, the structure in which the protection relay device 100 is connected with a personal computer may be sufficient. In this case, the display of the personal computer functions as the display 38 , and the keyboard, mouse, and the like of the personal computer function as the input interface 39 . In the case of the configuration, typically, the protective relay device 100 has a simple display device (eg, a fluorescent display tube, a 7-segment light emitting diode (LED), an indicator light such as a lamp).

The test device 110 is a device used for an operation test of the protection relay device 100 , and provides an input simulating an amount of electricity (eg, current, voltage) at the time of a system accident to the protection relay device 100 . In the operation test of the protective relay device 100 , the operator opens the circuit breaker 6 in order to isolate the protective relay device 100 from the power system. Thereby, since the supply of electric power from the power supply side to the load side is interrupted|blocked, the electric power system (for example, the power transmission line L) which is the protection object of the protection relay device 100 will be in a blackout state.

After putting the power system into a blackout state, an external test is performed on a terminal provided in the protective relay device 100 (eg, a terminal used to obtain an amount of electricity from the instrument current transformer 2 and the instrument transformer 4 ). The device 110 is connected, and the electric quantity (for example, a voltage or a current) for a test is input with respect to the protection relay device 100 from the test device 110 . In addition, when the protective relay device 100 is mounted on a panel, the external test device 110 may be connected to the terminal for a test mounted on the panel front side. For example, the amount of electricity for a test is input to the auxiliary transformer 10 .

The power supply device 120 is a device for supplying power to the protection relay device 100 . Typically, at the time of operation, the power from the power system (eg, the power transmission line L) is step-down through a transformer and supplied to the power supply device 120, so that the protection relay device 100 Power is supplied. In addition, as a countermeasure against temporary power failure, a battery may be provided between the transformer and the power supply device 120 . On the other hand, since the power system is completely in a blackout state at the time of the operation test, power is supplied to the power supply device 120 from the external power supply 130 (eg, a generator), thereby providing power to the protection relay device 100 . this is supplied

<Setting data>

It is a figure which shows an example of the setting data at the time of operation|use and an operation test. Fig. 2(a) shows the setting data 210 at the time of operation, and Fig. 2(b) shows the setting data 220 at the time of the operation test. For example, the setting data 210 is stored in the operation data storage area of the auxiliary storage device 35 , and the setting data 220 is stored in the test data storage area of the auxiliary storage device 35 .

The setting data 210 and 220 include a plurality of setting values respectively corresponding to a plurality of setting items. Specifically, the setting data 210 and 220 are the setting items, the operation value and operation time of the overcurrent relay element (corresponding to the "overcurrent element" in the drawing), and the overvoltage relay element (corresponding to the "overvoltage element" in the drawing). includes the operating value and operating time of , and the operating value and operating time of the undervoltage relay element (corresponding to the "undervoltage element" in the drawing). A corresponding setting value is set for each setting item. For example, the operating value of the overcurrent relay element and the setting value of the operating time included in the operating setting data 210 are "10.0A" and "0.10s", respectively. On the other hand, the setting values of the operating value and operating time of the overcurrent relay element included in the setting data 220 at the time of the operation test are "0.5A" and "0.01s", respectively. Thus, the setting value at the time of an operation test is set to the value smaller than the setting value at the time of operation in many cases.

The reasons are mainly two. The first reason is the limitation by the output performance of the test apparatus. Specifically, since the test apparatus is used only at the time of an operation test, portability and economical efficiency are calculated|required. Therefore, since a test apparatus is typically small and designed with low output, it may not be able to output the voltage and current equivalent to the amount of input electricity at the time of a system fault. In this case, it is necessary to change the setting value to a small value and perform an operation test.

The second reason is to check the precision of the protective relay device. Specifically, as described in FIG. 1 , the voltage and current input to the protection relay device are converted into discrete values (ie, digital data) by the AD converter. The resolution of the discrete value is proportional to the full scale (ie, the maximum voltage and current that the protective relay device can recognize) divided by the number of bits of the AD converter. Typically, since the resolution is uniform over the entire region from no input to full scale, the smaller the voltage and current input is, the larger the error in AD conversion due to the resolution becomes. Therefore, at the time of an operation test, assuming the case where the error of a protective relay device becomes largest, a setting value is set to the vicinity of the minimum value of a settable range, and the operation precision in the setting value is confirmed. Thereby, the operation test is performed under the strictest conditions.

In addition, also in settings other than a numerical value (that is, a setting value), an operation test may be performed under the setting conditions different from the time of operation. For example, when the contact output of the protection relay device is performed under the AND condition of the two protection relay elements during operation, in order to test the two protection relay elements separately during the operation test, the AND condition of the logic part is canceled. There are cases.

<Setting process of setting value>

As mentioned above, the setting value at the time of an operation test and the setting value at the time of operation are different in many cases. Therefore, after completion of an operation test, it is necessary to return the setting value applied to a protective relay device to the setting value at the time of operation from the setting value at the time of a test. This is because, when operation is resumed with the setting value at the time of the operation test set as the setting value applied to the protection relay device, the protection relay device is There is a possibility that the power system may be blacked out due to operation. Alternatively, even though an accident has occurred in the electric power system, the protective relay device does not operate, and there is a possibility that the equipment on the electric power system is lost and the accident is spread.

Therefore, in this embodiment, the structure which automatically sets the setting value at the time of operation|use after completion|finish of an operation test is demonstrated. It is a flowchart which shows an example of the setting process of a setting value.

Referring to Fig. 3, the CPU 32 determines whether or not to start the operation test of the protective relay device 100 (step S10). Specifically, when the CPU 32 receives an instruction to start the operation test from the user via the input interface 39 , the CPU 32 starts the operation test.

When the operation test is not started (NO in step S10), the CPU 32 executes the processing of step S10. When the operation test is started (YES in step S10), the CPU 32 sets the setting data at the time of the operation test as the setting data used for the relay operation (that is, applied to the protective relay device 100). (Step S12). Specifically, the CPU 32 reads setting data (eg, setting data 220) at the time of the operation test from the internal memory (eg, the auxiliary storage device 35), and sets the setting at the time of the operation test. Data is set as setting data including each setting value used for relay calculation. In addition, the CPU 32 may generate|generate the setting data at the time of an operation test newly instead of the setting data 220 according to the instruction|indication from a user. In this case, the CPU 32 may store the generated setting data in the test data storage area of the auxiliary storage device 35 as new setting data 220 during the operation test.

The CPU 32 determines whether or not to end the operation test (step S14). Specifically, the CPU 32 terminates the operation test when the end flag of the operation test is set to "on", and starts the operation test when the end flag of the operation test is set to "off". Continue (i.e., do not end the motion test). When the operation test is continued (NO in step S14), the CPU 32 determines whether or not a reference period of time (for example, 12 hours) or more has elapsed since the operation test was started (step S16). The reference time may be set arbitrarily by the user or may be a predetermined fixed value.

When more than the reference time has not elapsed (NO in step S16), the CPU 32 executes the processing of step S14. When more than the reference time has elapsed (YES in step S16), the CPU 32 sets the end flag of the operation test to "ON" (step S18), and executes the process of step S14.

When the end flag of the operation test is set to "ON" in step S18, the CPU 32 determines to end the operation test in step S14 (YES in step S14). In this case, the CPU 32 sets the setting data at the time of operation as the setting data used for the relay calculation (step S20). Specifically, the CPU 32 reads the setting data at the time of operation (eg, setting data 210) from the internal memory, and the setting data at the time of operation includes each setting value used for the relay operation. It is set as setting data to

According to the above, when the operation test is started, the setting data 220 is set as the setting data for the relay operation, and when the operation test is finished, the setting data 210 at the time of operation is the setting data for the relay operation. It is set automatically. Therefore, it is possible to avoid a situation in which the setting data 220 at the time of the operation test is being applied to the protective relay device 100 despite the operation test being completed.

In addition, in the flowchart of FIG. 3, although the structure in which the motion test is terminated after reference elapses after the motion test is started, it is not limited to this structure. For example, when there is an operation to cut off the power supply from the external power supply 130 to the protection relay device 100 during the operation test, the operation test is finished.

The reason for this is as follows. During normal operation, the protective relay device 100 is installed in the panel, and is connected to an input-side device such as an instrument current transformer 2 and an instrument transformer 4, and an output-side device such as a circuit breaker 6 . During the operation test of the protective relay device 100, the circuit inside the panel is turned off to exclude the influence of the input-side device, and to prevent malfunction of the output-side device and the occurrence of an electric shock accident of the worker due to live wire work. Separate the input-side and output-side devices from the protective relay. At this time, since the power supplied to the protection relay device 100 from the power system is also blackout, power is supplied from the external power source 130 prepared separately during the operation test. After the operation test is over, the power supply circuit is returned to the state before the operation test, so it is necessary to turn off the external power supply 130 again (that is, cut off the power from the external power supply 130). Therefore, if the power supply from the external power supply 130 is cut off during the operation test, it is considered that the operation test has been completed.

Then, after the power supply to the protection relay device 100 is resumed and the protection relay device 100 is restarted, the CPU 32 executes the processing of step S20 (that is, the setting data at the time of operation is transferred to the relay calculation). set as the setting data to be used).

In addition, when receiving an instruction to end the motion test from the user through the input interface 39 during the motion test, the CPU 32 may determine that the motion test has ended and execute the processing of step S20 .

<Change of setting value during operation>

In the event that the user changes the setting value included in the setting data during operation and wants to return the setting value before the change due to some circumstances, if there is no data recorded with the past setting value, it is recommended to return it to the original state. It is likely to become difficult. Therefore, in this embodiment, the structure which stores the setting data at the time of operation in association with time information is demonstrated.

It is a figure for demonstrating the flow of the change of setting data. With reference to Fig. 4, the setting data 310 at the time of operation is a period from 12:00 on January 1, 2020 to 11:59 on February 1, 2020 (hereinafter also referred to as "application period P1"). ) in the setting data applied to the protection relay device 100 . The setting data 320 at the time of operation is protected during the period from 12:00 on February 1, 2020 to 11:59 on March 1, 2020 (hereinafter also referred to as "application period P2"). It is setting data applied to the relay device 100 . The setting data 330 at the time of operation is the setting applied to the protection relay device 100 in the period from 12:00 of March 1, 2020 to the present (hereinafter also referred to as "application period P3"). It is data.

A flow in which the setting data 310 to 330 is stored will be described. Here, the setting data 310 will be described from the state in which it is stored in advance in the internal memory (for example, the auxiliary storage device 35). Since the power consumption (current) has increased due to the addition of new equipment (for example, a motor for belt conveyors) to the power system, the user can read the overcurrent relay of the setting data 310 at 12:00 on February 1, 2020. A change operation was performed to increase the operating value "10.0A" of the element to the operating value "20.0A". According to the change, the setting data 310 before the change is stored in association with the application period P1, and the setting data 320 is stored as new setting data after 12:00 on February 1, 2020.

Subsequently, since the consumption current of the added equipment is larger than expected, the user sets the operating value "20.0A" of the overcurrent relay element in the setting data 320 at 12:00 on March 1, 2020 to the operating value " A change operation was performed to increase to 25.0 A". In addition, since the amount of heat generated per unit time increases due to the large current, a change operation was performed to shorten the operation time “0.10s” of the overcurrent relay element of the setting data 320 to “0.05s” to prevent the loss of equipment in an accident. . According to the change, the setting data 320 before the change is stored in association with the application period P2, and the setting data 330 is stored as new setting data after 12:00 on March 1, 2020.

In this way, each of the setting data before and after the change is stored in association with time information (eg, application periods P1 to P3 ) indicating the period in which the setting data is applied to the protection relay device 100 . Thereby, when a user wants to return to the setting value before a change after a change of a setting value (that is, it wants to restore|restore), a past setting value can be referred.

Fig. 5 is a diagram showing an example of a screen for restoring a setting value. Referring to FIG. 5 , the CPU 32 displays a screen 510 on the display 38 upon receiving an instruction to restore the setting value through the input interface 39 . The screen 510 includes a selection area 512 for setting data in each of the application periods P1 to P3. For example, when the user selects the application period P2 , the CPU 32 displays the screen 520 on the display 38 . The screen 520 includes a display area 514 containing the setting data 320 in the application period P2 , a restore button 516 , and a return button 518 .

The user selects "operation value of overcurrent relay element" and "operation time of overcurrent relay element" as setting items to restore, and presses the restore button 516 . In this case, the setting value of the setting item "operation value of the overcurrent relay element" of the current setting data 330 is changed to 20.0A, and the setting value of the setting item "operation time of the overcurrent relay element" of the setting data 330 This is changed to 0.10s. In this way, by selecting a setting item to be restored (eg, the operation value of an overcurrent relay element), the user selects a setting value (eg, 25.0A) corresponding to the currently operated setting item, It can be restored to a setting value (eg, 20.0A) corresponding to the corresponding setting item in the period (eg, application period P2). In addition, the setting data 330 before the change and the new setting data after the change are stored in association with the time information at the time of the change.

6 is a diagram showing another example of a screen for restoring a setting value. The screen 530 shown in FIG. 6 is displayed instead of the screen 520 when the user selects the application period P2 on the screen 510 of FIG. 5 . The screen 530 is different from the screen 520 in that the "current setting value" is further displayed in the display area 532 . In the case of the screen 530 , since the user can easily grasp the difference between the setting value of the setting data 320 of the application period P2 and the current setting value, the restoration operation can be performed more quickly.

In the above, although the application period was illustrated and demonstrated as time information associated with setting data, it is not limited to the said structure. For example, it is good also considering the application start time to the protection relay device 100 of setting data as time information. In this case, the setting data 310 is associated with the application start time "12:00 on January 1, 2020", and the setting data 320 is the application start time "12: 00 on February 1, 2020" , and the setting data 330 is associated with the application start time “12:00 on March 1, 2020”.

Moreover, it is good also considering the application end time to the protection relay device 100 of setting data as time information. In this case, the setting data 310 is associated with the application end time "11:59 on February 1, 2020", and the setting data 320 is the application end time "11:59 on March 1, 2020" is associated with Setting data 330 is associated with information indicating what is currently being applied.

<Function Configuration>

7 is a block diagram showing an example of a functional configuration of the protection relay device 100 . Referring to FIG. 7 , the protection relay device 100 includes an electric quantity input unit 402 , a relay calculation unit 404 , a test execution unit 406 , a setting data setting unit 408 , and a setting data changing unit 410 . ) and a display control unit 412 . Typically, these functions are realized by processing circuitry. The processing circuit may be dedicated hardware or a CPU 32 that executes a program stored in the ROM 33 of the arithmetic processing unit 30 of FIG. 3 . When the processing circuit is dedicated hardware, the processing circuit is constituted by, for example, an FPGA, an ASIC, or a combination thereof. The protective relay device 100 further includes, for example, a storage unit 414 realized by the auxiliary storage device 35 .

The electric quantity input unit 402 receives input of current and voltage data (ie, electric quantity data) through the AD converter 27 . At the time of normal operation, electricity quantity data is input by the instrument current transformer 2 and the instrument transformer 4 provided in the electric power system (for example, the power transmission line L). At the time of the operation test, electric quantity data is input from the test apparatus 110 .

The relay calculation unit 404 performs a relay calculation based on the amount of electricity data and the setting data. Specifically, the relay calculation unit 404 performs relay calculation using electric quantity data input from an external device (eg, the instrument current transformer 2 , the instrument transformer 4 , and the test device 110 ). In detail, the relay calculation unit 404 performs calculations such as digital filter processing and calculation of the effective value on the electric quantity data, compares the calculation result with the setting data, and determines whether to operate the protection relay device 100 . do. When the relay operation unit 404 determines that the protection relay device 100 is operated, the relay operation unit 404 gives the operation determination result to the DO circuit 36, and sends an open signal from the DO circuit 36 to the circuit breaker 6 (for example, , trip signal).

The test execution unit 406 starts or ends the operation test of the protective relay device 100 based on a predetermined condition. Typically, when the test execution part 406 receives the instruction|indication input of the operation test start from a user, the operation test of the protective relay device 100 is started. In this case, for example, the control mode of the protective relay device 100 shifts from the operation mode to the test mode. In addition, the test execution unit 406 may output a notification of the start of the operation test to the setting data setting unit 408 .

In a certain situation, the test execution unit 406 ends the motion test when more than a reference time has elapsed since the motion test was started. In this case, for example, the control mode of the protective relay device 100 shifts from the test mode to the operation mode. On another situation, when the test execution part 406 receives the instruction|indication input of the operation test completion|finish from a user, the operation test of the protective relay device 100 is complete|finished. In addition, the test execution unit 406 may output a notification of the end of the operation test to the setting data setting unit 408 .

In another aspect, when the power supply to the protective relay device 100 is cut off during the operation test, the test mode is considered to be ended. Therefore, when the power supply to the protection relay device 100 is restarted and the protection relay device 100 is restarted, the control mode of the protection relay device 100 becomes the operation mode.

The setting data setting unit 408 sets setting data applied to the protection relay device 100 (ie, used for relay operation). Specifically, when the operation test of the protective relay device 100 is started (for example, when a notification of the operation test start is received from the test execution unit 406 ), the setting data setting unit 408 performs an operation test. The setting data (for example, setting data 220) of is set as setting data used for the relay calculation in the relay calculation part 404. Thereby, the relay calculation part 404 performs relay calculation using the setting data 220 for a test at the time of an operation test.

On the other hand, the setting data setting unit 408 is based on the completion of the operation test (eg, when receiving a notice of the operation test end from the test execution unit 406 , the power supply to the protection relay device 100 is block), the setting data used for the relay operation is changed from the setting data at the time of the operation test to the setting data at the time of operation (for example, the setting data 210).

The storage unit 414 includes an operating data storage area 451 and a test data storage area 452 . In the operation data storage area 451, various data used during operation (eg, setting data 210, etc.) are stored. In the test data storage area 452, various data (for example, setting data 220 and the like) used in the operation test are stored.

The setting data changing part 410 changes setting data (for example, setting data 210 at the time of operation) according to an operation instruction from a user. Specifically, the setting data change unit 410 is at least one of each setting value included in the setting data (eg, the setting data 210) currently in operation (eg, the operation value of the overcurrent relay element) setting value) is changed, setting data after the change is stored in the operation data storage area 451 of the storage unit 414 in association with the time information at the time of the change.

Thereby, in the operation data storage area 451, the setting data associated with the time information at the time of change is sequentially stored. For example, the setting data 310 of FIG. 4 is stored in association with time information at the time of change (for example, 12:00 on January 1, 2020), and the setting data 320 is the time at the time of change It is stored in association with information (for example, 12:00 on February 1, 2020), and the setting data 330 is time information at the time of change (for example, 12:00 on March 1, 2020) remembered in connection with Accordingly, the CPU 32 can easily determine the period in which each setting data is applied to the relay operation.

The display control unit 412 displays the screens 510 and 520 shown in FIG. 5 , the screen 530 shown in FIG. 6 , and the like on the display 38 . Specifically, the display control unit 412 is a first area (eg, setting data 310 ) indicating setting data (eg, setting data 310 ) at the time of operation in the first period (eg, application period P1 ). , an area in the application period P1 of the selection area 512), and a second indicating setting data (eg, setting data 320) at the time of operation in the second period (eg, application period P2) A display screen (eg, screen 510 ) including a region (eg, region of application period P2 of selection region 512 ) is displayed. Moreover, when the 2nd area|region is selected by the user, the display control part 412 displays each setting value contained in the setting data at the time of operation in the 2nd period on the display 38 (for example, the screen 520) ) or the screen 530 is displayed).

A setting item (for example, of the overcurrent relay element) corresponding to the setting value X (for example, 20.0A) among the respective set values included in the setting data at the time of operation in the second period displayed on the display 38 operation value) is selected by the user as the restoration target, the setting data changing unit 410 sets the setting value (for example, 25.0A) corresponding to the currently operated setting item, the setting in the second period Restore to the value X.

<Advantage>

According to this embodiment, after the operation test is finished, the setting data applied to the protective relay device 100 is automatically set from the setting data at the time of the operation test to the setting data at the time of operation. Therefore, it is possible to avoid a situation in which the setting value for the operation test by the user is used during operation. In addition, the setting data at the time of operation is stored in the internal memory in association with time information at the time of the change. Therefore, the user does not need to memorize the setting data before the change, nor does it need to separately record the setting data on an external recording medium or the like.

other embodiments.

The configuration exemplified as the above-described embodiment is an example of the configuration of the present embodiment, can be combined with other known techniques, and is configured by changing such as omitting a part without departing from the gist of the present disclosure It is also possible to

Although embodiment of this invention was described, it should be thought that embodiment disclosed this time is an illustration in every point and is not restrictive. The scope of the present invention is indicated by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Claims (6)

A protective relay device for protecting a power system, comprising:
A relay operation unit that performs a relay operation based on the electric quantity data and the setting data;
and a setting unit for setting the setting data,
the setting unit
When the operation test of the protection relay device is started, first setting data at the time of the operation test is set as the setting data used for the relay operation;
Protection relay which changes the said setting data used for the said relay calculation to the 2nd setting data at the time of operation for monitoring the said electric power system from the said 1st setting data based on the completion of the said operation test Device. The method according to claim 1,
When more than a reference time has elapsed since the operation test was started, the operation test is terminated. The method according to claim 1 or 2,
When the power supply to the protective relay device is cut off during the operation test, the operation test is terminated, the protective relay device. The method according to claim 1 or 2,
The setting data includes a plurality of setting values respectively corresponding to a plurality of setting items,
Further comprising a change unit for changing the setting data according to an operation instruction from a user,
When the change unit changes at least one of the respective setting values included in the second setting data currently being operated, the second setting data after the change is related to time information at the time of the change and stored in a memory, protective relay. 5. The method of claim 4,
A display control unit further comprising: a display control unit configured to display a display screen including a first region indicating the second setting data in the first period and a second region indicating the second setting data in the second period, ,
The protection relay device in which the said display control part displays each setting value contained in the said 2nd setting data in the said 2nd period on the said display, when the said 2nd area|region is selected by a user. 6. The method of claim 5,
When a setting item corresponding to a first setting value among respective setting values included in the second setting data in the second period is selected as a restoration object by the user, the change unit corresponds to the setting item currently in operation. The protective relay device which restore|restores a setting value to the said 1st setting value in the said 2nd period.

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