JP5901989B2 - Protection relay system and test method thereof - Google Patents

Description

  Embodiments described herein relate generally to a protection relay system to which a process bus is applied and a test method thereof.

  In the protection relay system, when a grid fault occurs in the power equipment, the power supply is stabilized by quickly disconnecting the equipment from the power system. In recent years, with the development of communication technology and digital protection control technology, a protection relay system incorporating a process bus has been proposed.

  In a protection relay system in which a process bus is introduced, an integrated unit and a protection unit are provided, and these two types of units are connected to the process bus via a communication interface unit. The integrated unit is a unit that converts the amount of electricity in the power system into digital data. In many cases, the integrated unit is arranged in the vicinity of the transformer device in order to take in the amount of electricity from the system. The protection unit is the main part of the system, takes digital data from the integrated unit, executes a relay operation, and makes an external determination within the protection section. The protection unit is generally arranged in a central monitoring room or the like.

  In such a protection relay system, since information is transmitted and received using a process bus, real-time information communication and high-accuracy time synchronization are possible, and advanced information system of the power system can be promoted. Further, in a protection relay system using a process bus, information can be collected from a plurality of integrated units into one protection unit to improve protection performance.

  By the way, in the protective relay system, an operation value test of a relay element built in each unit is performed in performing regular maintenance and inspection. For example, the protection unit performs a relay calculation test, and it is necessary to input electrical quantity information from the integrated unit using a tester. Electricity information is treated as system information regardless of whether it is input from the power system or from other than the power system.

  In addition to the relay calculation test described above, tests performed by the protection unit include a device display confirmation and a control test for confirming whether or not the information on the substation device is normally displayed on the protection unit. Operational information is required to perform device display confirmation and control tests. The operation information is information related to external devices such as circuit breakers and disconnectors, or information from devices other than the integrated unit. Since both the system information and the operation information are information used for testing, these information are defined as test information here.

Japanese Patent No. 3907998

  The following issues have been pointed out when testing a protection relay system using a process bus. That is, when the integrated unit is disposed near the substation equipment and the protection unit is disposed in a centralized management room or the like, these units are physically separated. For this reason, it was troublesome for the person in charge of the test to confirm which unit is conducting the test. Therefore, a lot of labor is required at the time of the test, and the work burden on the person in charge of the test has been increased.

  The protection relay system of this embodiment is for solving said subject. The object of the present embodiment is to improve the work efficiency of the test and improve the maintenance and inspection by making the person in charge of the test recognize the unit under test setting.

In order to achieve the above object, the protection relay system of the embodiment is characterized in that the following (a) to (j) are provided.
(A) An integrated unit that converts the amount of electricity in the power system into digital data.
(B) A protection unit that performs a relay operation based on the digital data and makes an external determination within the protection section.
(C) A process bus connecting the integrated unit and the protection unit.
(D) An integrated unit setting device that sets the integrated unit to a testable state.
(E) A test setting unit that generates test setting information indicating that the integrated unit setting device has set the integrated unit in a testable state.

(F) A test information input unit for inputting test information used for testing the protection unit to the integrated unit.
(G) A transmission unit that takes in the test setting information from the test setting unit and the test information from the test information input unit, and transmits the information to the process bus.
(H) A receiving unit that receives the test setting information and the test information from the process bus.
(I) A test execution unit that receives a combination of the test setting information and the test information from the reception unit and executes a test of the protection unit.
(J) A protection unit display device that displays that the protection unit is under test setting.

The block diagram of 1st Embodiment. The block diagram of 2nd Embodiment. The block diagram of 3rd Embodiment. The block diagram of 4th Embodiment. The block diagram of 5th Embodiment. The block diagram of 6th Embodiment. The block diagram of 7th Embodiment. The block diagram of 8th Embodiment. The block diagram of 9th Embodiment. The block diagram of 10th Embodiment.

  Hereinafter, an embodiment of a protection relay system will be described with reference to the drawings. The following embodiment is a technology applied to a protection relay system in which a protection unit and an integrated unit are connected using a process bus.

[First Embodiment]
The first embodiment will be described with reference to FIG.
(Overview of protection relay system)
Before describing the characteristic configuration of the first embodiment, an outline of a protection relay system to which a process bus is applied will be described with reference to FIG.

  As shown in FIG. 1, a circuit breaker 3 and a power transmission line 4 are connected to the bus 1 via an instrument current transformer 2. An instrument transformer 5 is connected to the bus 1. An integrated unit 6 of a protection relay system is arranged in the vicinity of the circuit breaker 3. In the protection relay system, a protection unit 17 and a circuit breaker control unit 98 are provided in addition to the integrated unit 6. The circuit breaker control unit 98 may be included in the integrated unit 6.

  The integrated unit 6, the protection unit 17, and the circuit breaker control unit 98 are provided with communication interface units 11, 18, and 99, respectively, through which the units 6, 17, and 98 are mutually connected to the process bus 16. It is connected. In the integrated unit 6, an A / D conversion unit 9 is connected to the communication interface unit 11, and an input converter 8 is connected to the A / D conversion unit 9.

  In the protection unit 17, a relay calculation unit 23 and a circuit breaker information display processing unit 24 are arranged. The circuit breaker control unit 98 is provided with a contact driving unit 100 that outputs a trip command to the circuit breaker 3.

(Normal operation of protection relay system)
The above protection relay system normally operates as follows. The instrument current transformer 2 measures the current waveform signal α of the system, and the instrument transformer 5 measures the voltage waveform signal β of the system. The input converter 8 of the integrated unit 6 receives the current waveform signal α from the instrument current transformer 2 and the voltage waveform signal β from the instrument transformer 5, and these signals α and β are input to the A / D converter 9. Send to. The A / D conversion unit 9 converts the waveform signals α and β into electrical quantity information which is digital data, and sends it to the communication interface unit 11. The communication interface unit 11 transmits the electric quantity information A to the process bus 16.

  In the protection unit 17, the communication interface unit 18 receives the electrical quantity information A from the process bus 16 and transmits this information to the relay calculation unit 23. The relay calculation unit 23 performs an accident determination calculation process based on the received electrical quantity information A. If the relay computing unit 23 determines that tripping of the circuit breaker 3 is necessary, a trip output signal is transmitted to the process bus 16 via the communication interface 18.

  In the circuit breaker control unit 98, when the communication interface unit 99 receives the trip signal from the process bus 16, the contact driving unit 100 operates to output a trip command to the circuit breaker 3. The circuit breaker 3 performs a tripping operation based on this tripping command. The above is the normal operation of the protection relay system.

(Constitution)
A characteristic configuration of the first embodiment will be described. The integrated unit 6 is provided with test terminals 7a and 7b, an input unit 10 for circuit breaker information B that is operation information, and a test setting unit 15 that generates information C during test setting. The test setting information C is information indicating that the integrated unit setting and display device 25 described later has set the integrated unit 6 to a testable state.

  Further, the communication interface unit 11 is provided with a transmission unit 12 for circuit breaker information B, a transmission unit 13 for electrical quantity information A as system information, and a transmission unit 14 for information C during test setting. The test terminals 7a and 7b are terminals for inputting an AC input electric quantity of the power system using a tester. The circuit breaker information B input unit 10 is connected to the circuit breaker 3 and is configured to input the circuit breaker information B from the circuit breaker 3. Note that the transmission units 12 to 14 are parts that realize a transmission function of each information by controlling the computer with software.

  An integrated unit setting and display device 25 is connected to the process bus 16 and the integrated unit 6. The integrated unit setting and display device 25 includes a first integrated unit setting unit 26 for setting a relay calculation test and a second integrated unit setting unit 27 for setting a circuit breaker information display test. ing. These integrated unit setting units 26 and 27 have both a setting function for receiving an operation from a person in charge of testing and setting the integrated unit 6 to a testable state and a display function for displaying the set test.

  The first integrated unit setting unit 26 has portions displayed as “test setting”, “setting”, and “cancellation”. The second integrated unit setting section 27 has a portion displaying “breaker“ ON ””, “SET”, and “RELEASE” indicating the state of the breaker 3. Among these, “test setting” in the integrated unit setting unit 26 and “breaker“ on ”” in the integrated unit setting unit 27 can be switched between a display state and a display off state. Further, “setting” and “cancellation” in the integrated unit setting units 26 and 27 are portions for receiving input operations from the person in charge of the test.

  The communication interface unit 18 on the protection unit 17 side is provided with a reception unit 19 for the electrical quantity information A, a reception unit 20 for the circuit breaker information B, and a reception unit 21 for the test setting information C. An AND circuit 22 a is connected to the receiving units 19 and 21, and an AND circuit 22 b is connected to the receiving units 20 and 21. A relay operation unit 23 is connected to the AND circuit 22a, and a circuit breaker information display processing unit 24 is connected to the AND circuit 22b. Note that the receiving units 19 to 21 are parts that realize a receiving function of each information by controlling the computer with software.

  A protection unit display device 28 is connected to the process bus 16 and the protection unit 17. The protection unit display device 28 is provided with a relay operation display unit 29 indicating the calculation result of the relay calculation unit 23, a circuit breaker information display unit 30, and a test setting information display unit 31.

(Test method)
In the first embodiment, a relay operation test and a circuit breaker information display test are performed on the protection unit 17. The execution unit of the relay calculation test is the relay calculation unit 23 of the protection unit 17 and uses electricity quantity information which is system information as test information. Moreover, the execution unit of the circuit breaker information display test is the circuit breaker information display processing unit 24 of the protection unit 17 and the circuit breaker information display unit 30 of the protection unit display device 28. The test information includes circuit breaker information which is operation information. Is used.

  When performing the relay operation test, based on the “setting” operation of the first integrated unit setting unit 26, the first integrated unit setting unit 26 sets the integrated unit 6 to a state in which the relay operation test can be performed, Display “Setting”. In response to the setting of the first integrated unit setting unit 26, in the integrated unit 6, the test terminal 7 a uses the tester to capture the current waveform signal α measured by the current transformer 2, and converts it into the input converter 8. Send to.

  Further, the test terminal 7 b takes in the voltage waveform signal β measured by the instrument transformer 5 using the tester and sends it to the input converter 8. The input converter 8 sends the current waveform signal α and the voltage waveform signal β to the A / D converter 9, and the A / D converter 9 converts these signals α and β into electrical quantity information A to convert the communication interface unit 11. Send to. When releasing the test state, based on the “release” operation of the first integrated unit setting unit 26, the first integrated unit setting unit 26 releases the relay calculation test possible state in the integrated unit 6, Turn off “Test Settings”.

  When the circuit breaker information display test is performed, based on the “setting” operation of the second integrated unit setting unit 27, the second integrated unit setting unit 27 puts the integrated unit 6 into a state in which the circuit breaker information display test is possible. Set. In response to the setting of the second integrated unit setting unit 27, in the integrated unit 6, the circuit breaker information input unit 10 inputs the circuit breaker information B from the circuit breaker 3.

  The circuit breaker information input unit 10 sends the circuit breaker information B to the communication interface unit 11 and the second integrated unit setting unit 27. The second integrated unit setting unit 27 receives the circuit breaker information B from the circuit breaker information input unit 10 and displays, for example, “circuit breaker“ ON ”” as the circuit breaker information B. The second integrated unit setting unit 27 cancels the breaker information display test possible state in the integrated unit 6 and the breaker information B by the operation of “cancel” by the second integrated unit setting unit 27. Turn off the circuit breaker “ON”.

  When at least one of the first and second integrated unit setting units 26 and 27 sets the integrated unit 6 to a testable state, the test setting unit 15 generates test setting information C and sends this to the communication interface unit 11. . In the communication interface unit 11, the transmission units 13, 12, and 14 transmit the electrical quantity information A, the circuit breaker information B, and the test setting information C to the process bus 16, respectively.

  On the protection unit 17 side, the receiving units 19, 20, and 21 of the communication interface unit 18 receive the electrical quantity information A, the circuit breaker information B, and the test setting information C from the process bus 16, respectively. The test setting in-progress display unit 31 of the protection unit display device 28 takes in the test setting in-progress information C from the protection unit 17 side and displays it.

  The receiving units 19 and 21 send the electric quantity information A and the test setting information C received from the process bus 16 to the AND circuit 22a, and the AND circuit 22a combines these information A and C and outputs them to the relay calculation unit 23. . When receiving the electrical quantity information A and the test setting information C, the relay calculation unit 23 recognizes that the test is being set and performs a relay calculation. The relay calculation unit 23 sends the calculation result to the relay operation display unit 29 of the protection unit display device 28. The relay operation display unit 29 presents the test result by displaying the operation of the relay element.

  The receiving units 20 and 21 send the circuit breaker information B and the test setting information C received from the process bus 16 to the AND circuit 22b. The AND circuit 22b combines the information B and C and outputs the combined information to the circuit breaker information display processing unit 24. When the circuit breaker information display processing unit 24 receives the test setting information C and the circuit breaker information B, the circuit breaker information display processing unit 24 recognizes that the test setting is being performed, performs a circuit breaker information display process, and displays the processing result of the protection unit display device 28. It sends to the circuit breaker information display part 30. The circuit breaker information display unit 30 finally displays and confirms the circuit breaker information B, whereby the circuit breaker information display test is completed.

(Function and effect)
In the first embodiment, when the first integrated unit setting unit 26 in the integrated unit setting and display device 25 displays “test setting”, it is clearly understood that the integrated unit 6 is in test setting. Further, by using the process bus 16, the test setting in-progress information C generated by the test setting unit 15 of the integrated unit 6 can be transmitted from the integrated unit 6 to the protection unit 17.

  Therefore, the protection unit display device 28 connected to the protection unit 17 can display the test setting in-progress information C on the test setting display unit 31. Thereby, the person in charge of the test can accurately grasp that the test is being set for the protection unit 17 as well.

  As described above, according to the first embodiment, the person in charge of the test can surely recognize the integrated unit 6 and the protection unit 17 that are under test setting. That is, it is easy for the tester to confirm which unit is performing the test. Therefore, even if the integrated unit 6 and the protection unit 17 are physically separated, the test of the protection relay system is efficient. It can be performed well, and the maintenance and inspection work of the system can be simplified. As a result, the maintenance and inspection of the protection relay system can be improved, and excellent reliability can be obtained.

[Second Embodiment]
FIG. 2 is a block diagram of the second embodiment. The same components as those in the first embodiment are given the same reference numerals, and duplicate descriptions are omitted. The definitions of the system information and the operation information in the second embodiment are equivalent to those in the first embodiment, and the system information is described as electric quantity information and the operation information is described as circuit breaker information.

(Constitution)
As shown in FIG. 2, the second embodiment is characterized in that the integrated unit 6 includes a storage unit 32 for recording data serving as test information. The storage unit 32 is connected to the A / D conversion unit 9 and the circuit breaker information input unit 10. The storage unit 32 takes in and stores the electrical quantity information and the circuit breaker information from the A / D conversion unit 9 and the circuit breaker information input unit 10.

  An information calling unit 33 that calls recording data from the storage unit 32 is connected to the storage unit 32. The information calling unit 33 is connected to the communication interface unit 11. The communication interface unit 11 includes a first recording data D transmission unit 34 and a second recording data E transmission unit 35 that transmit recording data from the integrated unit 6 to the protection unit 17. 2 and the subsequent drawings, the first recording data D and the second recording data E are indicated as “recording data 1” and “recording data 2”.

  The integrated unit setting and display device 25 includes a recording data setting unit 39 and a test activation unit 38. The recording data setting unit 39 is a part that displays the recording data stored in the storage unit 32 and accepts an input operation of the person in charge of the test and selects arbitrary recording data. The test activation unit 38 is a part that sends the recording data selected by the recording data setting unit 39 from the communication interface unit 11 of the integrated unit 6 to the communication interface unit 18 of the protection unit 17.

  On the other hand, the communication interface unit 11 of the protection unit 17 includes a receiving unit 36 for the first recording data D and a receiving unit 37 for the second recording data E. In addition, since electric quantity information is used as the 1st recording data D received with the receiving part 36, the receiving part 19 is abbreviate | omitted in the protection unit 17 of 2nd Embodiment.

(Test method)
In the second embodiment, the relay calculation test and the circuit breaker information display test of the protection unit 17 are performed as follows. First, the recording data setting unit 39 of the integrated unit setting and display device 25 displays the recording data stored in advance in the storage unit 32, and based on the input operation of the person in charge of the test, the first recording that is the electric quantity information. Data D is selected, and second recording data E that is circuit breaker information is selected.

  In the integrated unit setting and display device 25, the integrated unit 6 is set to the relay calculation test state and the circuit breaker information display test state by the first and second integrated unit setting units 26 and 27. In response to the settings of the integrated unit setting units 26 and 27, in the integrated unit 6, the calling unit 33 calls the recording data from the storage unit 32, and the first and second recording data selected by the recording data setting unit 39 therefrom. D and E are sent to the communication interface unit 11.

  Further, when the integrated unit setting and test activation unit 38 of the display device 25 operates, the transmission units 34 and 35 transmit the first and second recording data D and E to the process bus 16, respectively. In the integrated unit 6, the input converter 8, the A / D converter 9, the circuit breaker information input unit 10, and the test setting unit 15 are set in the same manner as in the first embodiment.

  In the communication interface unit 18 of the protection unit 17, the receiving units 21, 36 and 37 receive the test setting in-progress information C and the first and second recording data D and E, respectively. The AND circuit 22 a inputs the first recording data D from the receiving unit 36 and the test setting in-progress information C from the receiving unit 21, and transmits them to the relay calculation unit 23 in combination. The relay calculation unit 23 recognizes that the test is being set by receiving the electrical quantity information and the test setting information, and performs a protection relay calculation. Further, the protection unit 17 performs a circuit breaker display process in the circuit breaker information display processing unit 24 based on the second recording data E that is circuit breaker information and the test setting information C.

(Function and effect)
According to the above-described second embodiment, by using the recording data stored in advance in the storage unit 32 as system information and operation information, the relay operation test of the protection unit 17 can be performed without newly taking in such information. And a circuit breaker information display test can be performed. Therefore, maintenance and inspection work for the integrated unit 6 and the protection unit 17 can be performed at a desired timing, and maintenance and inspection work for the system operator can be further reduced.

[Third Embodiment]
(Constitution)
FIG. 3 is a configuration diagram of the third embodiment. The same components as those of the second embodiment are denoted by the same reference numerals, and redundant description is omitted. The integration unit 6 of the third embodiment is obtained by omitting the circuit breaker information input unit 10 and the second recording data transmission unit 35 from the integration unit 6 of the second embodiment. Further, the second integrated unit setting unit 27 is omitted from the integrated unit setting and display device 25.

  A protection unit display and setting device 28 </ b> A is connected to the process bus 16 and the protection unit 17. The protection unit display and setting device 28A is provided with a protection unit setting unit 44 in addition to the relay operation display unit 29 described above. The protection unit setting unit 44 is a part that sets the protection unit 17 in a relay calculation test enabled state and displays the set test.

  Similarly to the integrated unit setting unit 26 on the integrated unit 6 side, the protection unit setting unit 44 has display portions of “test setting”, “setting”, and “cancel”, and “test setting” indicates the display state and display. The display can be switched to the off state. Further, “setting” and “cancellation” are parts that receive an operation from the person in charge of the test and realize the setting function and its cancellation function.

  The protection unit 17 according to the third embodiment includes an AND circuit 22c, OR circuits 41a and 41b, a second test setting unit 42 that generates second test setting information F, and second test setting information. A storage unit 43 that stores F is provided. The third embodiment is characterized in that the second test setting unit 42 and the protection unit setting unit 44 are provided.

  The second test setting information F generated by the second test setting unit 42 is information indicating that the protection unit setting unit 44 has set the protection unit 17 in a testable state. The second test setting information F storage unit 43 is a part that receives the second test setting information F from the second test setting unit 42 and transmits the second test setting information F to the AND circuits 22a and 22c.

  In the OR circuit 41a, the receiving units 19 and 36 are connected to the input side, and the AND circuit 22a is connected to the output side. The OR circuit 41b has AND circuits 22a and 22b connected to the input side, and the relay operation unit 23 connected to the output side. In the AND circuit 22c, the receiving units 21 and 43 are connected to the input side, and the AND circuit 22b is connected to the output side.

(Test method)
In the third embodiment, the relay calculation test of the protection unit 17 is performed as follows. That is, the recording data setting unit 39 of the integrated unit setting and display device 25 displays the recording data stored in advance in the storage unit 32, and based on the input operation of the person in charge of the test, the first recording data that is electric quantity information Select D.

  In the integrated unit setting and display device 25, the integrated unit 6 is set to the relay operation test state by the first integrated unit setting unit 26. In response to this setting, in the integrated unit 6, the calling unit 33 calls the recording data from the storage unit 32, and sends the first recording data D selected by the recording data setting unit 39 to the communication interface unit 11.

  When the integrated unit setting and test activation unit 38 of the display device 25 operates, the first recording data transmission unit 34 transmits the first recording data to the process bus 16. In the integrated unit 6, the setting states of the test terminal 7, the input converter 8, the A / D converter 9, the circuit breaker information input unit 10, and the test setting unit 15 are the same as those in the first embodiment.

  In the protection unit display and setting device 28A, when the tester performs an input operation on “setting”, the protection unit setting unit 44 sets the protection unit 17 to a state in which the relay arithmetic test can be performed, Display “Test Settings”. In order to cancel the test state, the person in charge of the test inputs “cancel” of the protection unit setting unit 44, so that the protection unit setting unit 44 cancels the relay calculation test possible state in the protection unit 17, Turn off “Test Settings”.

  When the protection unit setting unit 44 sets the protection unit 17 to a testable state, the second test setting unit 42 generates second test setting information indicating that the protection unit 17 is in test setting. Then, the second test setting unit 42 sends the generated second test setting information F to the storage unit 43.

  In the communication interface unit 18 of the protection unit 17, the receiving units 21 and 36 receive the test setting in-progress information C and the first recording data D, respectively. The AND circuit 22a inputs the first recording data D from the receiving unit 36 via the OR circuit 41a and also receives the second test setting information F from the receiving unit 43.

  The AND circuit 22a combines the first recording data D, which is electrical quantity information, and the second test setting information F, and transmits the combined information to the relay operation unit 23 via the OR circuit 41b. The relay calculation unit 23 receives these pieces of information D and F, recognizes that the protection unit 17 is under test setting, and performs protection relay calculation.

  The AND circuit 22c combines the test setting in-progress information C from the integrated unit 6 side via the receiving unit 21 and the second test setting in-progress information F from the storage unit 43 of the protection unit 17 and outputs the combined information to the AND circuit 22b. To do. The AND circuit 22b combines the first recording data D from the receiving unit 36 and the test setting in-progress information C and F from the AND circuit 22c and transmits them to the relay calculation unit 23. The relay calculation unit 23 can perform the protection relay calculation by receiving these pieces of information D, C, and F.

  Since the receiving units 19 and 36 are connected to the OR circuit 41a, instead of the first recording data D received by the receiving unit 36 as the electrical quantity information received from the integrating unit 6, the integrated unit 6 It is also possible to receive the test electricity quantity information A taken in from the test terminals 7a and 7b by the receiving unit 19 and perform a relay calculation using this information.

(Function and effect)
In the third embodiment, recording data D and test setting information C, which are electrical quantity information transmitted from the integrated unit 6 to the protection unit 17, and second test setting information F generated by the protection unit 17, Are combined, and the relay calculation unit 23 performs a relay calculation test. According to the third embodiment as described above, it is possible to make the person in charge of the test recognize that the units 6 and 17 are under test setting only by setting either the integrated unit 6 or the protection unit 17. This further improves system maintenance and checkability.

  Further, in the third embodiment, since the test setting information C and F is generated independently on the integrated unit 6 side and the protection unit 17 side, the integrated unit 6 and the protection unit can be protected by collating them. Compared with the case where the test setting information is generated in only one of the units 17, the tester's alerting power to the test target unit is increased, and the efficiency of the test can be further increased.

[Fourth Embodiment]
(Constitution)
FIG. 4 is a configuration diagram of the fourth embodiment. The same components as those of the third embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the fourth embodiment, the integrated unit setting and display device 25 includes a target protection unit display and selection unit 47. The target protection unit display and selection unit 47 displays a plurality of protection units 17 and selects an arbitrary protection unit in response to an operation of the person in charge of the test from the displayed one. The target protection unit display and selection unit 47 sends information G regarding the selected target protection unit to the communication interface unit 11 of the integrated unit 6. Further, the communication interface unit 11 of the integrated unit 6 is provided with a transmission unit 45 for target protection unit information G. The transmission unit 45 transmits the target protection unit information G selected by the display and selection unit 47 to the process bus 16.

  On the other hand, the communication interface unit 18 of the protection unit 17 is provided with a receiving unit 46 for the target protection unit information G. Further, in the protection unit 17 of the fourth embodiment, the AND circuit 22c, the OR circuit 41b, and the second test setting unit 42 are omitted. Furthermore, the protection unit display device 28 of the fourth embodiment omits the circuit breaker information display unit 30 from the display device 28 of the first embodiment.

(Test method)
In the fourth embodiment, when the relay operation test of the protection unit 17 is performed, the first recording data D as the electrical quantity information is selected by the recording data setting unit 39 of the integrated unit setting and display device 25. Further, the protection unit 17 to be tested is selected by the target protection unit display and selection unit 47.

  Then, in the communication interface unit 11 of the integrated unit 6, the transmission units 14, 34, 45 respectively send the test setting in-progress information C, the first recording data D, and the test target protection unit information G via the process bus 16. The data is transmitted to the communication interface unit 18 of the protection unit 17. In the communication interface unit 18, the receiving units 21, 46, and 36 receive the test setting in-progress information C, the target protection unit information G, and the first recording data D, respectively.

  The AND circuit 22b receives the test setting in-progress information C from the receiving unit 21 and the target protection unit information G from the receiving unit 46, and sends the two pieces of information C and G to the AND circuit 22a in combination. The AND circuit 22a further takes in the first recording data D from the receiving unit 36, and transmits a total of three pieces of information C, D, and G to the relay calculation unit 23.

  The relay computing unit 23 recognizes that the target protection unit selected by combining the test setting in-progress information C and the target protection unit information G is in the test setting, and further stores the first recording data D as the electric quantity information. Combined to perform protection relay calculations. In the fourth embodiment, the receiving units 19 and 36 are connected to the OR circuit 41a as in the third embodiment, so that the receiving unit replaces the first recording data received by the receiving unit 36. It is also possible to use the electrical quantity information A received at 19.

(Function and effect)
According to the fourth embodiment, there are the following unique effects. That is, the test can be performed after the protection unit 17 to be tested is selected in advance by the target protection unit display and selection unit 47. Therefore, the tester does not mistake the unit to be tested, and the work efficiency of the test is further improved.

[Fifth Embodiment]
(Constitution)
FIG. 5 is a configuration diagram of the fifth embodiment. The same components as those of the third embodiment are denoted by the same reference numerals, and description of overlapping portions is omitted.

  The fifth embodiment is characterized in that the protection unit 17 includes a trip output permission unit 48 and a trip output prohibition unit 49. The trip output permission unit 48 outputs a “use” command for the circuit breaker 3 to the AND circuit 22c. The trip output prohibiting unit 49 outputs a “not used” command for the circuit breaker 3 to the AND circuit 22d.

(Test method)
The fifth embodiment is characterized in that when a relay calculation test of the relay calculation unit 23 is performed, a trip output signal to the circuit breaker 3 is permitted or prohibited. In the protection unit 17, the first recording data D received from the integrated unit 6 and the test setting information C are combined by the AND circuit 22 a and taken into the relay operation unit 23. The relay calculation unit 23 performs a relay calculation test based on the information C and D. Here, the test result of the relay calculation is H. The relay operation test result H and the test setting in-progress information C are combined in the AND circuit 22b and sent to the AND circuits 22c and 22d.

  If the relay calculation test result H satisfies a predetermined condition, a trip output signal for the circuit breaker 3 is permitted. In this case, the AND circuit 22c combines the test setting information C and the “use” command from the trip output permission unit 48 to output the trip output permission 50.

  If the relay calculation test result H does not satisfy the predetermined condition, the trip output signal to the circuit breaker 3 is prohibited. In this case, the trip output lock 51 is output by combining the test setting in-progress information C and the “not used” command 49 from the trip output prohibiting section 49 in the AND circuit 22d. As in the third and fourth embodiments, since the receivers 19 and 36 are connected to the OR circuit 41a, the test terminals 7a and 7a of the integrated unit 6 are replaced with the first recording data D. It is also possible to take in the electric quantity information A for test from 7b and use it.

(Function and effect)
In the fifth embodiment as described above, the protection unit 17 that performs the relay calculation test can permit or prohibit the trip output signal to the circuit breaker 3 to increase the attention of the tester for the test. it can. Even if the relay calculation unit 23 operates during test setting, if the relay calculation test result H does not satisfy the predetermined condition, the trip output signal to the circuit breaker 3 is prohibited, so that the protection unit 17 malfunctions. Can be reliably prevented. Therefore, according to the fifth embodiment, it is possible to safely perform a test in which the circuit breaker 3, the integrated unit 6, and the protection unit 17 are combined.

[Sixth Embodiment]
(Constitution)
FIG. 6 is a configuration diagram of the sixth embodiment. The same components as those of the fifth embodiment are denoted by the same reference numerals and redundant description is omitted.

  In the sixth embodiment, the integrated unit 6 is provided with a recording activation relay 52 capable of recording setting, a recording time unit 53, a recording manual activation unit 54, and a recording trigger 63. In addition, the communication interface unit 11 of the integrated unit 6 includes a receiving unit 55 that receives the recording activation signal L from the protection unit 17 side.

  Further, in the integrated unit 6, the OR circuit 41c includes a recording time signal I from the recording activation relay 52, a recording manual activation signal J from the recording time unit 53, a recording setting signal K from the recording manual activation unit 54, The recording start signal L received by the receiving unit 55 is input. The OR circuit 41 c outputs any of these signals I to L to the recording trigger 63. In addition, the integrated unit setting and display device 25 includes a recording time setting unit 56 that sets a recording time in the recording time unit 53 on the integrated unit 6 side, and a recording manual activation unit 54 or a recording activation relay 52 on the integrated unit 6 side. A recording start unit 57 for outputting a recording start command is provided.

  Further, the protection unit 17 is provided with a recording time section 58 and a recording manual activation section 59. The communication interface unit 18 of the protection unit 17 includes a transmission unit 60 for transmitting the recording activation signal L. The transmission unit 60 inputs the recording time signal J from the recording time unit 58 and the recording manual activation signal K from the recording manual activation unit 59 from the OR circuit 41d, and uses these signals J and K as the recording activation signal L. Send. The protection unit display and setting device 28A outputs a recording manual start command to the recording time setting unit 61 for setting the recording time in the recording time unit 58 on the protection unit 17 side, and to the recording manual starting unit 59 on the protection unit 17 side. A recording starter 62 is provided.

(Record data storage)
The integrated unit 6 of the sixth embodiment is characterized in that the recording data that is test information is stored as follows. In the integrated unit 6, the signal I from the recording activation relay 52, the recording time signal J from the recording time unit 53, the recording manual activation signal K from the recording manual activation unit 54, and the recording activation received by the receiving unit 55. The recording trigger 63 is executed by one of the signals L. Thereby, the electrical quantity data can be stored in the storage unit 32 as the system information input to the integrated unit 6.

  In the sixth embodiment, the test recording data adopted by the protection unit 17 can be sent to the integrated unit 6 and stored. That is, the conditions for operating in the relay calculation unit 23 based on the information on the amount of electricity received by the protection unit 17 from the integrated unit 6, the conditions for the trip output permission 50, the conditions derived from the recording time unit 58 or the recording manual activation unit 59 are as follows. Then, the recording start signal L is transmitted from the transmission unit 60 to the integrated unit 6 side.

  The integrated unit 6 performs the recording trigger 63 by receiving the recording start signal L at the receiving unit 55, and with respect to the electrical quantity information under various conditions on the protection unit 17 side with respect to the storage unit 32, the electrical quantity for testing. It can be saved as information. In addition, instead of the reception condition of the electrical quantity information received by the protection unit 17 from the integrated unit 6, it is also possible to save the electrical quantity information for testing by using the recording data transmission / reception function by the transmission unit 34 and the reception unit 36. It is.

(Function and effect)
According to the sixth embodiment as described above, when the maintenance and inspection of the integrated unit 6 and the protection unit 17 are performed, the amount of electricity for testing is determined by a manual function by a human system when a power system fault occurs or at an arbitrary time. Information can be saved. In addition, by using the stored electrical quantity information, it is possible to easily perform a confirmation test of the relay calculation unit 23 of the protection unit 17 and further simplify the maintenance and inspection work of the system operator. .

[Seventh Embodiment]
(Constitution)
FIG. 7 is a block diagram of the seventh embodiment. The same reference numerals are given to the same components as those of the sixth embodiment, and a duplicate description is omitted. The communication interface unit 11 of the integrated unit 6 according to the seventh embodiment includes a recording activation signal L transmission unit 64.

(Record data storage)
In the seventh embodiment, the process bus 16 connects a plurality of integrated units 6. In the seventh embodiment, when the recording trigger 63 is executed, the transmission unit 64 of the integrated unit 6 other than the execution of the recording trigger 63 sends a recording start signal to all the integrated units 6 connected to the process bus 16. L is transmitted.

  Since the communication interface unit 11 of the integration unit 6 includes the reception unit 55 of the recording activation signal L in addition to the transmission unit 64, the subsequent operation is equivalent to that of the sixth embodiment. Record data of test information can be saved. As in the sixth embodiment, the recording trigger 63 includes a recording activation relay 52, a recording time unit 53, a recording manual activation unit 54, and a recording activation signal L receiving unit from the protection unit 17 included in the integrated unit 6. This is performed by signals I to L from any of 55.

(Function and effect)
According to the seventh embodiment described above, the test recording data can be stored in the integrated unit 6 other than the recording trigger 63. Therefore, the recording data of the integrated unit 6 and the protection unit 17 other than the protection facility target can be stored in the plurality of integrated units 6 connected to the process bus 16 and can be shared. For this reason, the recorded data can be used more effectively, and the test of the relay computing unit 23 of the protection unit 17 and the information display test of the substation equipment can be easily performed. It can be further enhanced.

[Eighth Embodiment]
(Constitution)
FIG. 8 is a configuration diagram of the eighth embodiment. The system information defined in the eighth embodiment will be described as electric quantity data input from the power system or other than the power system.

  In the eighth embodiment, the protection unit 17 is one device, and the integrated units 64 and 68 are two devices. The system information and the operation information of each integrated unit 64 and 68 are the same current transformer 2 and meter. The input is from the transformer 5. In addition to the input converter 8a, the A / D conversion unit 9a and the communication interface unit 11a, the integration unit 64 includes a storage unit 32a, a calling unit 33a, test terminals 7a and 7b, a test setting unit 15a, and an electrical quantity information transmission unit. 66, a recording data transmission unit 34a, and a test setting in-progress information C transmission unit 67.

  In addition to the input converter 8b, the A / D conversion unit 9b, and the communication interface unit 11b, the integration unit 68 includes a storage unit 32b, a calling unit 33b, test terminals 71a and 71b, a test setting unit 15b, an electric quantity information A transmission unit 69, a recording data transmission unit 70, and a test setting in-progress information C transmission unit 71 are provided.

  On the other hand, the protection unit 17 is connected to the integrated unit 64 and the integrated unit 68 via the process bus 16, and in addition to the communication interface unit 18, an electric quantity reception 72, a recording data reception 74, a test setting reception 74, an electric quantity reception. Unit 75, fourth recording data receiving unit 76, test setting receiving unit 77, and reception first arrival determination processing unit 75.

(Test method)
In the eighth embodiment, when the test of the relay operation unit 23 is performed, the integrated unit setting and the test setting of the integrated unit 64 are performed from the display device 25, and then the AC input electric quantity is input from the test terminals 7a and 7b. Thereby, the transmission units 66 and 67 of the integrated unit 64 take in the electrical quantity information A and the test setting information C.

  Then, the transmission units 66 and 67 transmit the electrical quantity information A and the test setting in progress information C to the communication interface unit 18 of the protection unit 17 via the process bus 16. The receiving units 72 and 74 of the protection unit 17 receive the electrical quantity information A and the test setting information C as information from the integrated unit 64 via the communication interface unit 18, and the electrical quantity information A and the test setting information C Are input to the reception first arrival determination processing unit 75.

  Further, the test setting of the other integrated unit 68 is performed from the integrated unit setting and display device 25, and then the AC input electric quantity is input from the test terminals 71a and 71b. Thereby, the transmission units 69 and 71 of the integrated unit 68 take in the electrical quantity information A and the test setting information C. Then, the transmission units 69 and 71 transmit the electrical quantity information A and the test setting in progress information C to the communication interface unit 18 of the protection unit 17 via the process bus 16.

  The receiving units 75 and 77 of the protection unit 17 receive the electric quantity information A and the test setting in-progress information C as information from the integrated unit 68 via the communication interface unit 18, and receive the electric quantity information A and the test setting in-progress information C. In combination, the data is input to the reception first arrival determination processing unit 75. The reception first arrival determination processing unit 75 recognizes the arrival of data on the first arrival, and sends the first arrival electric quantity information A and test setting in progress information C to the relay calculation unit 23. The relay calculation unit 23 performs a relay calculation test using the electrical quantity information A and the test setting information C. Note that the recording data may be transmitted to the protection unit 17 side instead of the electrical quantity information A by using the transmission units 34a and 70 of the integrated units 64 and 68.

(Function and effect)
In the eighth embodiment, by providing the reception first arrival determination processing unit 75 on the protection unit 17 side, the following operational effects can be obtained. That is, since the reception first arrival determination processing unit 75 performs reception first arrival determination, even when a plurality of integrated units 64 and 68 are connected in the process 16, the person in charge of the test is unaware of the arrival order of the system information and the operation information. Test, maintenance and inspection can be easily performed. Therefore, the burden on the person in charge of the test can be reduced.

[Ninth Embodiment]
(Constitution)
FIG. 9 is a configuration diagram of the ninth embodiment. The same components as those in the sixth embodiment are given the same reference numerals, and redundant description is omitted.

  In the integrated unit 6 of the ninth embodiment, the AND circuit 22e sends the test setting in-progress information C from the test setting unit 15 and the recording data from the calling unit 33 to the recording start relay 52. Yes. The protection unit 17 includes a test setting unit 42a, a recording trigger 82, a storage unit 84, and a calling unit 85.

  Further, in the protection unit 17, the AND circuit 22f sends the test setting information G from the test setting unit 42a and the recording data from the calling unit 85 to the relay operation unit 23. The protection unit display and setting device 28A connected to the process bus 16 and the protection unit 17 includes a recording data setting unit 39 in addition to the protection unit setting unit 44, the recording time setting unit 61, and the recording activation unit 62. Is provided. The recording data setting unit 39 is a part that displays the recording data stored in the storage unit 84 and accepts an input operation of the person in charge of the test and selects arbitrary recording data.

  In such a ninth embodiment, in the integrated unit 6, when performing maintenance inspection of the built-in recording activation relay 52, the test setting in-progress information C from the test setting unit 15 and the recording data 81 are combined, The operation of the recording start relay 52 can be confirmed. In the protection unit 17, the test setting unit 42 a generates test setting in-progress information G in response to the protection unit setting and the setting from the display device 28 </ b> A.

  The recording data stored in the storage unit 84 by the recording trigger 82 can be selected through the protection unit setting and recording data setting unit 39 of the display device 28A. The relay calculation unit 23 can take in the combination of the test setting information G and the recording data from the calling unit 85 and perform the relay calculation of the relay calculation unit 23.

(Function and effect)
According to said 9th Embodiment, the protection relay element built in the integrated unit 6 using the test setting conditions of the integrated unit 6 or the protection unit 17, and the recording data preserve | saved by each unit 6 and 17 is used. It is possible to perform the test of the system, and it is possible to further improve the maintenance and checkability of the system.

[Tenth embodiment]
(Constitution)
FIG. 10 is a configuration diagram of the tenth embodiment. The same reference numerals are given to the same components as those of the first embodiment, and duplicate descriptions are omitted.

  In the tenth embodiment, the relay operation of the protection unit 17 is performed using a plurality of integrated units 6c, 6d, and 6e. The integrated units 6c, 6d, and 6e of the tenth embodiment use input converters 8c, 8d, and 8e, A / D converters 9c, 9d, and 9e, communication interface units 11c, 11d, and 11e, and a tester, respectively. Test terminals 7c, 7d, and 7e capable of inputting system information are provided. The communication interface units 11c, 11d, and 11e of the integrated units 6c, 6d, and 6e are provided with transmission units 86, 87, and 88 of electrical quantity information.

  The integrated unit 6e has a test setting unit 15e. In addition, a test electricity quantity information output unit that outputs test electricity quantity information is connected to the test terminal 7e of the integrated unit 6e. Furthermore, the communication interface unit 11e of the integrated unit 6e includes a test setting in-progress transmission unit 89.

  Further, the integrated unit setting and display device 25a is connected to the process bus 16 and the integrated unit 6e. The integrated unit setting and display device 25 a includes a test setting and display unit 26. On the other hand, the protection unit 17 includes, in addition to the relay calculation unit 23, receiving units 90, 91, and 92 for the electrical quantity information A from the integrated units 6c, 6d, and 6e, and a receiving unit 93 for the test setting in-progress information C. .

  The protection unit 17 is provided with a test relay calculation unit 94 separately from the relay calculation unit 23. The test relay calculation unit 94 may be either the same relay element housed in the relay calculation unit of the protection unit 17 or the minimum relay element for confirmation test. The protection unit display device 28 that can be connected to the process bus 16 and the protection unit 17 includes a test relay display unit 95 that displays the calculation result of the test relay calculation unit 94.

(Test method)
The protection unit 17 receives the electrical quantity information A from the integrated unit 6c by the receiving unit 90, receives the electrical quantity information from the integrated unit 6d by the receiving unit 91, and receives the electrical quantity information A and the test from the integrated unit 6e. In-setting information C is received by the receiving units 92 and 93. The electrical quantity information A and the test setting information C are combined and sent to the test relay calculation unit 94, and the test relay calculation unit 94 performs a relay calculation test.

  The test relay display unit 95 of the protection unit display device 28 displays the calculation result of the test relay calculation unit 94. Thereby, it is possible to confirm the relay operation during the test setting. It should be noted that the electric quantity information A received by the receiving unit 92 is a combination of the electric quantity reception 1, the electric quantity reception 2, and the electric quantity reception 3 when the test setting is not performed by the protection unit 17. At 23, it is possible to perform normal relay calculations.

(Function and effect)
According to the tenth embodiment as described above, the relay arithmetic test can be performed by the test relay arithmetic unit 94 while the normal protective relay calculation is continued by the relay arithmetic unit 23. For this reason, normal protection relay calculation can be continued in parallel with the execution of the test.

  Therefore, when it is necessary to newly add the integrated unit 6 to the process bus 16, the function of the integrated unit 6 and the protection unit 17 in operation can be obtained by combining the test setting condition, the electrical quantity information, and the test relay. It is possible to maintain the protection function without affecting it. As a result, there is no fear that the protection unit is stopped until the expansion operation of the integrated unit is completed, and the protection relay system can maintain an excellent protection function.

[Other Embodiments]
In addition, said embodiment is shown as an example in this specification, Comprising: It does not intend limiting the range of invention. In other words, the present invention can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof in the same manner as included in the scope and gist of the invention.

  For example, the target device for the device information display test is not limited to the circuit breaker but may be a disconnector. In addition, the display indicating the test setting information indicating that the unit is in the test setting can be selected as appropriate, such as “setting”, “setting”, “test setting”, and the display mode can also be changed. It is. Further, various settings and processes of the system can be realized by controlling a computer including a peripheral device with a program, and the implementation mode is appropriately selected.

6, 6c, 6d, 6e, 64, 68 ... integrated units 7a, 7b, 7c, 7d, 7e ... test terminals 8, 8a, 8b, 8c, 8d, 8e ... input conversion units 9, 9a, 9b, 9c, 9d, 9e ... A / D converter 10 ... Circuit breaker information input unit 11, 18 ... Communication interface unit 12 ... Circuit breaker information transmission unit 13 ... Electric quantity information transmission unit 14 ... Test setting in-progress information transmission unit 15, 15b, 15e ... Test setting unit 16 ... Process bus 17 ... Protection units 19, 86, 87, 88 ... Electric quantity information receiving unit 20 ... Breaker information receiving unit 21 ... Test setting in-progress information receiving unit 23 ... Relay calculation Unit 24 ... Circuit breaker information display processing unit 25 ... Integrated unit setting and display device 26 ... First integrated unit setting unit 27 ... Second integrated unit setting unit 28 ... Protection unit display device 28A ... Protection unit display and setting 32, 32a, 32b, 84 ... storage units 33, 33a, 33b, 85 ... calling unit 34 ... first recording data transmission unit 35 ... second recording data transmission unit 36 ... first recording data reception Unit 37 ... Second recording data receiving unit 38 ... Test starting unit 39 ... Recording data setting unit 44 ... Protection unit setting unit 47 ... Target protection unit display and selection unit 48 ... Trip output permission unit 49 ... Trip output prohibition unit 75. Reception first arrival determination processing unit

Claims (16)

An integrated unit that converts the amount of electricity in the power system into digital data;
A protection unit that performs a relay operation based on the digital data and makes an external determination within the protection section; and
A process bus connecting the integrated unit and the protection unit;
An integrated unit setting device for setting the integrated unit to a testable state ;
A test setting unit that generates test setting information indicating that the integrated unit setting device has set the integrated unit in a testable state;
A test information input unit that inputs test information used for testing the protection unit to the integrated unit;
The test setting information from the test setting unit, the test information from the test information input unit, respectively, and a transmission unit for transmitting these information to the process bus,
A receiving unit for receiving the test setting information and the test information from the process bus;
A test execution unit that receives a combination of the test setting information and the test information from the reception unit, and executes a test of the protection unit;
A protection relay system comprising: a protection unit display device that displays that the protection unit is under test setting.   The protection relay system according to claim 1, further comprising an integrated unit display device that displays that the integrated unit is under test setting. The integrated unit includes a storage unit for storing the test information, and a calling unit for calling predetermined test information from the test information stored in the storage unit,
The transmitting unit transmits the test information called by the calling unit to the process bus,
The protection relay system according to claim 1, wherein the receiving unit receives the test information called by the calling unit from the process bus. A protection unit setting section for setting the protection unit in a testable state;
A second test setting unit for generating second test setting information indicating that the protection unit setting unit has set the protection unit in a testable state; and
The said test execution part receives combining said 2nd test setting information and the said information for a test, and performs the test of the said protection unit, The any one of Claims 1-3 characterized by the above-mentioned. Protection relay system.   The protection relay system according to claim 1, wherein the transmission unit transmits the test setting information and the test information to a protection unit to be protected.   2. The protection unit outputs a circuit breaker trip command when a protection section internal determination is made, and locks a trip output signal to the circuit breaker when the test is being set. The protection relay system of any one of -5.   The protection unit outputs a circuit breaker trip command when the internal determination of the protection section is made, and if the test is being set and the test result by the test execution unit is within a predetermined threshold, the protection unit A trip signal output is output, and the trip signal output to the circuit breaker is locked when the test is being set and the test result by the test execution unit deviates from a predetermined threshold. The protection relay system of any one of -5.   The integrated unit includes at least one of a recording start relay capable of recording setting, a recording start manual unit, a recording time setting unit, and a recording start signal receiving unit from the protection unit. The protection relay system according to any one of claims 1 to 7, wherein the test information is stored using a signal from either as a trigger.   The protection unit includes a recording setting unit by activation of a protective relay built in the unit, a recording manual activation unit, a recording time setting unit, a recording activation signal output unit, and a trip command signal output unit to a circuit breaker. The information for testing employed at the protection unit side is stored using at least one as a trigger from a signal from any one of these components. The protection relay system described in.   When the protection unit requires a plurality of the integrated units, the system information in all the integrated units is stored based on a storage command signal for the test information in any integrated unit. The protection relay system according to any one of 1 to 9. The protection unit is installed in one series for the target protection section, and the integrated unit is installed in a plurality of series for the target protection section,
By receiving the test information and the test set in the information from the arbitrary integration units, according to claim 10, wherein the test setup portion of the integrated unit and generates the test setup during the information Protection relay system. The protection unit is installed in one series for the target protection section, and the integrated unit is installed in a plurality of series for the target protection section,
When the transmission of the plurality of the integrated unit to transmit the test information and the test setup during the information includes a determination unit of the fastest reception reception arrival time for the receiver of the protection unit to determine the fastest of the integrated unit The protection relay system according to any one of claims 1 to 11, wherein   The protection relay system according to any one of claims 1 to 12, wherein the protection unit tests the protection unit using only the test setting information and the test information.   The said integrated unit performs the test setting of the protection relay element built in the said integrated unit using only the said information during a test setting, and the said information for a test, The any one of Claims 1-13 characterized by the above-mentioned. The protection relay system described in. The said protection unit is provided with the protection relay calculating part, and was provided with the protection relay calculating part for a test separately from the said protection relay calculating part . Protection relay system. An integrated unit for converting the amount of electricity in the power system into digital data, a protection unit for executing a relay operation based on the digital data and making an external determination within a protection section, and a process bus connecting the integrated unit and the protection unit A test method for a protection relay system comprising:
An integrated unit setting step for setting the integrated unit to a testable state ;
A test setting step for generating test setting information indicating that the integrated unit is set in a testable state in the integrated unit setting step;
A test information input step for inputting test information used for testing the protection unit to the integrated unit;
The test setting information generated in the test setting step, and the test information input in the test information input step, respectively, and transmitting the information to the process bus,
Receiving the test setting information and the test information from the process bus; and
A test execution step of receiving a combination of the test setting information and the test information and executing a test of the protection unit;
A test setting display step for displaying that the protection unit is in test setting.

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