Method and system for testing 35kV large partition relay protection scheme of urban rail transit power supply

Abstract

The invention provides a method and a system for testing an urban rail transit power supply 35kV large partition relay protection scheme, and the method comprises the steps: determining a to-be-tested relay protection device, filling a corresponding relay protection program for the to-be-tested relay protection device, importing a test table corresponding to the to-be-tested relay protection device into test management software, and testing the to-be-tested relay protection device according to the test table. The test table comprises a protection action opening and intertripping locking test table, a switch position signal test table and the like; during testing, a protection action and intertripping locking testing step, a switch position signal switching-in testing step, a switching-on and switching-off command testing step, an alarm signal switching-in testing step and the like are executed respectively. Therefore, the test platform of the relay protection device is firstly built, the test platform is used for carrying out protection action and inter-tripping locking test, switch position signal test, opening and closing command test, alarm signal opening and closing test and the like, and software and hardware combined test strategies are used for testing the relay protection device. Various function tests of the relay protection device can be realized without experienced workers, and the test efficiency and quality are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection testing, and in particular to a testing method and system for a 35kV large-area relay protection scheme for urban rail transit power supply. Background Art

[0002] Relay protection devices refer to important equipment that sends out alarm signals or cuts off faults when a fault or abnormality occurs during the operation of the power system. The 35kV large-area relay protection scheme for urban rail transit power supply is a complex and sophisticated system that includes multiple relay protection devices. Through a precisely designed relay protection device network, comprehensive monitoring and protection of the power supply system is achieved, providing a solid guarantee for the safe operation of urban rail transit.

[0003] It should be noted that with the rapid development of urban rail transit systems, the power supply system is the "heart" of the entire rail transit system, and its stability and reliability are directly related to the safe and efficient operation of trains. The 35kV large-area power supply system is a key component of it, and relay protection is an important safety guarantee mechanism in this system, so its performance and reliability testing is particularly important.

[0004] Therefore, functional testing of the 35kV large-area relay protection scheme for urban rail transit power supply is an important measure to ensure safe and stable operation of the system, improve the efficiency of fault detection and repair, support technology upgrades and optimization, and meet the requirements of specifications and standards. It is also an important measure to verify whether the relay protection device and its network can operate reliably. The test results can be used as an important basis for technical evaluation in subsequent fault repairs and medium and major repairs.

[0005] For example, the Chinese patent with application number 202321298828.0 discloses a 35kV full-station real relay protection experimental platform for urban rail transit power supply. The signal input is opened through a button or a relay protection tester, and the signal output is fed back through an audible and visual alarm device. The relay protection test is realized by pure hardware equipment. The structure is complex and experienced staff are required to operate the test button and analyze the audible and visual alarm content to complete the test.

[0006] Therefore, it is very necessary to design a testing method and system that does not rely on the experience of the staff and has high testing efficiency.

[0007] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0008] Based on this, it is necessary to provide a testing method and system for a 35kV large-area relay protection scheme for urban rail transit power supply in response to the above technical problems.

[0009] In order to achieve the above-mentioned object, the first aspect of the present invention provides a testing method for a 35kV large-area relay protection scheme for urban rail transit power supply, comprising:

[0010] A test platform for relay protection devices is constructed, wherein the test platform includes a test terminal pre-installed with test management software, a measurement and control device, a relay protection tester, a simulated switch device for simulating a circuit breaker, and an adjustable power supply; wherein the test terminal is respectively connected in communication with each relay protection device to be tested, each relay protection device to be tested is respectively connected in communication with the measurement and control device, the relay protection tester, the simulated switch device, and the adjustable power supply, and the measurement and control device is also respectively connected in communication with the test terminal and the simulated switch device;

[0011] When performing relay protection testing based on the test platform, execute:

[0012] Determine the relay protection device to be tested, install the corresponding relay protection program for the relay protection device to be tested, and import the test table corresponding to the relay protection device to be tested into the test management software; wherein the test table includes a protection action opening and interlocking test table, a switch position signal test table, a closing and opening command test table, and an alarm signal opening and input test table;

[0013] During the protection action and inter-tripping and locking test, the relay protection tester is used to apply a first simulated fault current to the corresponding relay protection device in the relay protection network to be tested, so that the corresponding relay protection device outputs a protection action signal, a locking signal, an inter-tripping signal and a tripping information; the corresponding relay protection device in the relay protection network to be tested transmits the protection action signal, the locking signal, the inter-tripping signal and the tripping information to the test terminal respectively, so that the test management software determines whether the inter-tripping and locking function of the relay protection network to be tested is normal according to the protection action opening and inter-tripping and locking test table;

[0014] During the switch position signal input test, the test terminal sends a switch position signal test instruction to the analog switch device through the measurement and control device. After receiving the switch position signal test instruction, the analog switch device performs corresponding opening and closing operations and outputs a corresponding switch position signal; the relay protection device to be tested receives the switch position signal output from the analog switch device and transmits it to the test terminal, so that the test management software determines the switch position signal input test result according to the switch position signal test table;

[0015] During the opening and closing command test, the test terminal sends an opening and closing control instruction to the analog switch device via the relay protection device to be tested, and the analog switch device performs the opening and closing operation according to the received opening and closing control instruction; the analog switch device transmits the position state after the opening and closing operation to the test terminal via the relay protection device to be tested, so that the test management software determines the opening and closing command test result according to the opening and closing command test table;

[0016] During the alarm signal input test, the test terminal sends a simulated alarm instruction to the relay protection device to be tested through the measurement and control device. After receiving the simulated alarm instruction, the relay protection device to be tested outputs an alarm signal and uploads it to the test terminal, so that the test management software determines the alarm signal input test result according to the alarm signal input test table.

[0017] In order to achieve the above-mentioned purpose, the second aspect of the present invention provides a test system for a 35kV large-area relay protection scheme for urban rail transit power supply, which includes a test terminal pre-installed with test management software, a measurement and control device, a relay protection tester, a simulation switch device for simulating a circuit breaker, and an adjustable power supply; wherein the test terminal is respectively connected to each relay protection device to be tested in communication, and each relay protection device to be tested is respectively connected to the measurement and control device, the relay protection tester, the simulation switch device and the adjustable power supply in communication, and the measurement and control device is also respectively connected to the test terminal and the simulation switch device in communication;

[0018] The test management software includes a protection program management module, a protection action and interlocking test module, a switch position signal input test module, a switch opening and closing command test module, and an alarm signal input test module;

[0019] The protection program management module is used to determine the relay protection device to be tested and to install the corresponding relay protection program for the relay protection device to be tested; it is also used to receive the test table corresponding to the relay protection device to be tested; wherein the test table includes the protection action opening and interlocking test table, the switch position signal test table, the opening and closing command test table and the alarm signal opening and input test table;

[0020] The protection action and inter-tripping and interlocking test module is used to receive the protection action signal, inter-tripping signal, inter-tripping signal and tripping information uploaded by the corresponding relay protection device in the relay protection network to be tested; it is also used to judge whether the inter-tripping and inter-tripping function of the relay protection network to be tested is normal according to the protection action opening and inter-tripping and inter-locking test table; wherein the protection action signal, the inter-tripping signal, the inter-tripping signal and the tripping information are the feedback information output by the corresponding relay protection device after the relay protection tester applies the first simulated fault current to the corresponding relay protection device in the relay protection network to be tested;

[0021] The switch position signal input test module is used to send a switch position signal test instruction to the analog switch device via the measurement and control device, so that the analog switch device performs corresponding opening and closing operations and outputs corresponding switch position signals after receiving the switch position signal test instruction; it is also used to receive the switch position signal uploaded by the analog switch device via the relay protection device to be tested, so as to perform switch position input monitoring according to the switch position signal test table, and determine the switch position signal input test result;

[0022] The opening and closing command test module is used to send opening and closing control instructions to the analog switch device via the relay protection device to be tested, so that the analog switch device performs opening and closing operations according to the received opening and closing control instructions, and outputs the position state after the opening and closing operations; and is also used to receive the position state of the analog switch device uploaded by the relay protection device to be tested, so as to determine the opening and closing command test result according to the opening and closing command test table;

[0023] The alarm signal input test module is used to send a simulated alarm instruction to the relay protection device under test via the measurement and control device, so that the relay protection device under test outputs an alarm signal corresponding to the simulated alarm instruction; it is also used to receive the alarm signal uploaded by the relay protection device under test, so as to determine the alarm signal input test result according to the alarm signal input test table.

[0024] The beneficial effects of the present invention are:

[0025] The present invention first builds a test platform for the relay protection device, and uses the test platform to perform protection action and interlocking tests, switch position signal tests, opening and closing command tests, and alarm signal input tests, etc. By using a test strategy that combines software and hardware, various functional tests of the relay protection device can be implemented without the need for experienced staff, effectively improving test efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a test system for a 35kV large-area relay protection solution for urban rail transit power supply according to the present invention;

[0027] Figure 2 It is a structural schematic diagram of the test platform of the present invention;

[0028] FIG3( a ) is a schematic flow chart of the protection action and interlocking test steps of the present invention;

[0029] FIG3( b ) is a schematic flow chart of the protection action test steps of the present invention;

[0030] Figure 3(c) is a schematic diagram of a 35kV large-area power supply mode (part of the 35kV large-area relay protection scheme for urban rail transit power supply);

[0031] Figure 4 It is a schematic flow chart of the switch position signal input test steps of the present invention;

[0032] Figure 5 It is a schematic flow chart of the opening and closing command test steps of the present invention;

[0033] Figure 6 It is a flow chart of the alarm signal input test step of the present invention;

[0034] Figure 7 It is a schematic flow chart of the circuit breaker failure function test steps of the present invention;

[0035] Figure 8 It is a signal flow diagram of the reserved function test of the present invention;

[0036] Fig. 9 It is a flow chart of 35kV system GOOSE communication working condition monitoring of the present invention;

[0037] Fig.10 is a schematic diagram of the structure of a test system in a specific embodiment of the present invention;

[0038] In the figure: 1. Relay protection device to be tested; 2. Mobile test terminal; 3. Fixed test terminal; 4. QR code scanner; 5. Analog switch device; 6. Measurement and control device; 7. GOOSE monitoring device; 8. IP KVM; 9. Switch; 10. Communication management machine; 11. Adjustable power supply; 12. Relay protection tester. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0040] For ease of understanding, the interactive parties and / or terms and / or custom words involved in the present invention are first described in conjunction with the technical solution of the present invention:

[0041] Relay protection device: with opening and closing functions, locking and tripping functions, and failure protection functions, etc.

[0042] It should be noted that the present invention can perform switch position signal tests, opening and closing command tests, and alarm signal input tests on a single relay protection device, and can also perform protection action and interlocking tests on a relay protection network composed of multiple relay protection devices.

[0043] Test terminal: includes a mobile test terminal 2 and a fixed test terminal 3, which are pre-installed with test management software. The test management software is used to receive the test table corresponding to the relay protection device 1 to be tested, and respectively execute the protection action and interlocking test, switch position signal test, opening and closing command test and alarm signal input test and other test steps to realize integrated testing.

[0044] Measurement and control device 6: When the switch position signal is turned on for testing, the switch position signal test instruction issued by the test terminal is sent through the measurement and control device 6; it can also be used to collect protection action signals and switch position signals and send them to the test terminal for judgment.

[0045] Relay protection tester 12: It is an instrument that simulates fault current and outputs it to the relay protection device. It is used in the protection action signal and interlocking test of the protection device. It automatically outputs at the same time when it is turned on and can be used as a protection power supply without software settings and adjustments.

[0046] Analog switches 5: devices that receive the opening and closing commands issued by the relay protection device and simulate the opening and closing position change of the switch. They are used in switch position signal testing and protection failure testing, and are used to simulate the circuit breakers, disconnectors, grounding switches and other switches in the 35kV large-area relay protection scheme for urban rail transit power supply.

[0047] Adjustable power supply 11: The voltage level can be adjusted to meet the working voltage index of the test protection device by adjusting the voltage.

[0048] Example 1

[0049] This embodiment provides a specific implementation method of a test method for a 35kV large-area relay protection scheme for urban rail transit power supply; the test method includes:

[0050] Build a test platform for relay protection devices, as shown in the attached Figure 2 As shown, the test platform includes a test terminal pre-installed with test management software, a measurement and control device 6, a relay protection tester 12, a simulation switch device 5 for simulating a circuit breaker, and an adjustable power supply 11; wherein the test terminal is respectively connected to each relay protection device 1 to be tested in communication, each relay protection device 1 to be tested is respectively connected to the measurement and control device 6, the relay protection tester 12, the simulation switch device 5 and the adjustable power supply 11 in communication, the measurement and control device 6 is also connected to the test terminal in communication, and the measurement and control device 6 is also connected to the test terminal and the simulation switch device 5 in communication;

[0051] When performing relay protection testing based on the test platform, execute:

[0052] Determine the relay protection device 1 to be tested, install the corresponding relay protection program for the relay protection device 1 to be tested, and import the test table corresponding to the relay protection device 1 to be tested into the test management software; wherein the test table includes a protection action opening and interlocking test table, a switch position signal test table, a closing and opening command test table, and an alarm signal opening and input test table;

[0053] As shown in Figures 3(a) and 3(b), during the protection action and inter-tripping and interlocking test, the relay protection tester 12 is used to apply a first simulated fault current to the corresponding relay protection device in the relay protection network to be tested, so that the corresponding relay protection device outputs a protection action signal, a locking signal, an inter-tripping signal and a tripping information; the corresponding relay protection device in the relay protection network to be tested transmits the protection action signal, the locking signal, the inter-tripping signal and the tripping information to the test terminal, respectively, so that the test management software determines whether the inter-tripping and inter-locking function of the relay protection network to be tested is normal according to the protection action opening and inter-tripping and interlocking test table;

[0054] As attached Figure 4 As shown, during the switch position signal input test, the test terminal sends a switch position signal test instruction to the analog switch device 5 via the measurement and control device 6. After receiving the switch position signal test instruction, the analog switch device 5 performs corresponding opening and closing operations and outputs a switch position signal corresponding to the switch position signal test instruction; the relay protection device to be tested receives the switch position signal output from the analog switch device 5 and transmits it to the test terminal, so that the test management software determines the switch position signal input test result according to the switch position signal test table;

[0055] As attached Figure 5 As shown, during the opening and closing command test, the test terminal sends an opening and closing control instruction to the analog switch device 5 via the relay protection device 1 to be tested, and the analog switch device 5 performs the opening and closing operation according to the received opening and closing control instruction; the analog switch device 5 transmits the position state after the opening and closing operation to the test terminal via the relay protection device 1 to be tested, so that the test management software determines the opening and closing command test result according to the opening and closing command test table;

[0056] As attached Figure 6 As shown, during the alarm signal input test, the test terminal sends a simulated alarm instruction to the relay protection device 1 to be tested via the measurement and control device 6. After receiving the simulated alarm instruction, the relay protection device 1 to be tested outputs an alarm signal and uploads it to the test terminal, so that the test management software determines the alarm signal input test result according to the alarm signal input test table.

[0057] It should be noted that the present invention first builds a test platform for the relay protection device, and uses the test platform to perform protection action and interlocking tests, switch position signal tests, opening and closing command tests, and alarm signal input tests, etc., and uses a test strategy that combines software and hardware. Various functional tests of the relay protection device can be implemented without experienced staff, which effectively improves the test efficiency and quality.

[0058] It can be understood that the characteristic of a short-circuit fault is the presence of an abnormally large current, which is detected by the relay protection device;

[0059] It should be noted that during the protection action and interlocking test, the relay protection network to be tested may include multiple relay protection devices. In this case, it is necessary to input simulated fault currents to the multiple relay protection devices through the relay protection tester 12.

[0060] In a specific implementation, a 35kV busbar C point short circuit fault and a 35kV large partition protection system function detection scheme under normal power supply mode are taken as an example for description, and the protection action opening and interlocking lockout test table is shown in the following table:

[0061]

[0062]

[0063] It should be noted that, as shown in Figure 3(c), the relay protection network to be tested includes multiple relay protection devices in a zone A, B and C; under normal power supply mode, 35kV current flows from A to C, and the 35kV busbars of A, B and C operate separately; when the 35kV busbar C point short-circuit fault occurs, the fault current flows in the following direction: from the first incoming switch of A (incoming line 1 in the figure) to the 35kV I-section busbar of A, through the second outgoing switch of A (outgoing line 2 in the figure) to the ring network cable between A and B, and then from the fifth incoming switch of B (incoming line 5 in the figure) to the busbar of B, through the sixth outgoing switch of B (outgoing line 6 in the figure) to the ring network cable between B and C, and finally from the ninth incoming switch of C (incoming line 9 in the figure) to the short-circuit point of the busbar of C. The fault point is at the busbar of C station. According to the 35kV large-area power supply mode and the flow of fault current, the ninth incoming switch of C station (incoming line 9 in the figure), the fifth incoming switch of B station (incoming line 5 in the figure), the sixth outgoing switch (outgoing line 6 in the figure), the first incoming switch of A station (incoming line 1 in the figure) and the second outgoing switch (outgoing line 2 in the figure) will have fault short-circuit current flowing at the same time. In order to achieve the reliability and selectivity of system protection under the 35kV large-area power supply mode, the protection scheme is pre-configured as follows:

[0064] 1) Fault point C: ① The relay protection device of the ninth incoming switch (incoming line 9 in the figure) detects the fault current, the bus current protection of the relay protection device is activated, the ninth incoming switch (incoming line 9 in the figure) trips, and the fault is cleared. ② After the bus current protection of the relay protection device of the ninth incoming switch (incoming line 9 in the figure) is activated, the bus current protection lockout signal is sent to the tenth outgoing switch (outgoing line 10 in the figure) of this station. ③ After the bus current protection of the relay protection device of the ninth incoming switch (incoming line 9 in the figure) is activated, the bus current protection action trip signal is sent to the tenth outgoing switch (outgoing line 10 in the figure) of this station, and the tenth outgoing switch (outgoing line 10 in the figure) trips;

[0065] 2) Station B outside the fault zone: ① The relay protection devices of the fifth incoming switch (incoming line 5 in the figure) and the sixth outgoing switch (outgoing line 6 in the figure) of Station B detect the fault current at the same time, and their relay protection devices respectively send out bus current start-up signals at the same time. ② After the bus current start-up signal is sent out by the relay protection devices of the fifth incoming switch (incoming line 5 in the figure) and the sixth outgoing switch (outgoing line 6 in the figure) of Station B, a bus current protection lockout signal is sent to the other party at the same time. ③ Because the relay protection devices of the fifth incoming switch (incoming line 5 in the figure) and the sixth outgoing switch (outgoing line 6 in the figure) of Station B receive the bus current protection lockout signal from the other party at the same time, the protection is locked by the other party, and the fifth incoming switch (incoming line 5 in the figure) and the sixth outgoing switch (outgoing line 6 in the figure) of Station B do not trip;

[0066] 3) Station A outside the fault area: The protection scheme is the same as that of Station B.

[0067] It should also be noted that the relay protection tester 12 is connected to the first incoming switch of station A (incoming line 1 in the figure), the second outgoing switch of station A (outgoing line 2 in the figure), the fifth incoming switch of station B (incoming line 5 in the figure), the sixth outgoing switch of station B (outgoing line 6 in the figure), and the ninth incoming switch of station C (incoming line 9 in the figure) through the analog input terminal. Different protection devices in the 35kV station or large sub-area are connected through hard wires or GOOSE according to the protection scheme and the logical relationship of the design;

[0068] When the protection action and interlocking test are performed on the relay protection network to be tested, the relay protection tester 12 is used to simultaneously apply a first simulated fault current to the relay protection devices of the first incoming switch of the A station (incoming line 1 in the figure), the second outgoing switch of the A station (outgoing line 2 in the figure), the fifth incoming switch of the B station (incoming line 5 in the figure), the sixth outgoing switch of the B station (outgoing line 6 in the figure), and the ninth incoming switch of the C station (incoming line 9 in the figure), simulating a short-circuit fault of the 35kV busbar C point in a partition;

[0069] The normal protection action, interlocking signal, switch tripping condition and qualified standard test table are shown in the table above. Therefore, the test management software can compare the actual measured results with the normal conditions in the test table to determine whether the protection device action and interlocking function are normally opened according to the design requirements, and then determine whether the interlocking function of the relay protection network to be tested is normal (if the actual measured results match the normal conditions in the test table, the interlocking function of the relay protection network to be tested is normal, otherwise it means that the interlocking function of the relay protection network to be tested is abnormal).

[0070] Under normal circumstances, each relay protection device in the relay protection network to be tested will respectively execute the above protection schemes 1), 2) and 3) to provide power supply protection for stations A, B and C; at this time, the protection and action phenomena corresponding to the relay protection devices of the first incoming switch of station A (incoming line 1 in the figure), the second outgoing switch of station A (outgoing line 2 in the figure), the fifth incoming switch of station B (incoming line 5 in the figure), the sixth outgoing switch of station B (outgoing line 6 in the figure), and the ninth incoming switch of station C (incoming line 9 in the figure) are consistent with the above table, indicating that the interlocking function of the relay protection network to be tested is normal;

[0071] It should also be noted that if the protection and action phenomena of one or more of the relay protection devices of the first incoming switch of A (incoming line 1 in the figure), the second outgoing switch of A (outgoing line 2 in the figure), the fifth incoming switch of B (incoming line 5 in the figure), the sixth outgoing switch of B (outgoing line 6 in the figure), and the ninth incoming switch of C (incoming line 9 in the figure) are inconsistent with the above table, it is determined that the interlocking function of the relay protection network to be tested is abnormal.

[0072] It can be understood that input and output are two functions of the relay protection device. The "point type DI" is the protection input table, and the "point type DO" is the protection output table. In another specific implementation, the protection action output and interlocking test table is shown in the following figure:

[0073]

[0074]

[0075] It should be noted that, in this embodiment, when the switch position signal is turned on for testing, position remote control tripping can be achieved; at this time, the switch position signal test instruction (remote control tripping instruction) is issued by the test terminal and sent to the analog switch device 5 via the measurement and control device 6. Under normal circumstances, the analog switch device 5 will trip upon receiving the switch position signal test instruction (remote control tripping instruction); therefore, remote opening and closing control of the analog switch device 5 can be achieved through the test terminal.

[0076] In another specific implementation, the switch position signal test table is shown in the following table:

[0077]

[0078]

[0079] It should be noted that the test result column in the above table corresponds to the switch position signal input test result, specifically referring to whether it is normal (if the switch position signal output by the analog switch device is consistent with the status description, it is normal, otherwise it is abnormal).

[0080] As attached Figure 4 As shown, the simulated switch device 5 is used to simulate switches such as circuit breakers, disconnectors, and earthing switches. The switch position signal output by the simulated switch device 5 is input into each relay protection device via the position input terminal; each relay protection device is connected to the test terminal through a communication line, and the open and closed dual-point input monitoring of the switch position is realized through the test management software; the test management software automatically completes the test output, monitoring and result judgment according to the switch position signal test table shown in the above table.

[0081] In another specific implementation, the opening and closing command test table is shown in the following table:

[0082]

[0083]

[0084] As attached Figure 5 As shown, the relay protection device 1 to be tested is interconnected with the test terminal through the communication management machine 10, and the relay protection device 1 to be tested is also connected to the analog switch device 5 through the signal output terminal for sending the opening and closing control instructions to the analog switch device 5 to control the analog switch device 5 to complete the opening and closing operation; the analog switch device 5 is also connected to the relay protection device 1 to be tested through the position input terminal for transmitting the position state after the opening and closing operation to the relay protection device 1 to be tested; the relay protection device 1 to be tested uploads the position state after the opening and closing operation to the test terminal, realizing the closed-loop management of the issuance and feedback of the opening and closing commands, so that the test management software realizes the test result evaluation function (when the position state after the opening and closing operation matches the corresponding instruction in the "Attribute Description" column of the above table, it means that the opening and closing command test of the relay protection device to be tested has passed, otherwise it means that it has failed).

[0085] It should be noted that when the alarm signal is turned on for testing, the communication connection relationship between the test terminal, the measurement and control device 6, and the relay protection device 1 to be tested is as shown in the attached figure. Figure 6As shown; various simulated alarm instructions are automatically simulated through the test management software. After receiving the simulated alarm instruction, the relay protection device 1 under test outputs an alarm signal and feeds back the alarm signal to the test terminal. The test management software determines whether the issued simulated alarm instruction matches the alarm signal fed back by the relay protection device 1 under test, thereby realizing the automatic discrimination function of the test signal.

[0086] In another specific implementation, the alarm signal is input into the test table as shown in the following table:

[0087]

[0088]

[0089]

[0090] It should be noted that, under normal circumstances, the simulated alarm instruction is consistent with the alarm signal fed back by the relay protection device 1 to be tested. The "Test Result" column in the above table indicates the result of comparing the alarm signal fed back by the relay protection device with the simulated alarm instruction issued by the test terminal. If the two results are consistent, "the test result is passed", otherwise, "the test result is failed".

[0091] It should also be noted that the "Attribute Description" column and the "Alarm Status" column together constitute the simulated alarm instruction. The alarm signal refers to the result after the relay protection device executes the instruction issued by the test terminal. The simulated alarm instruction and the alarm signal are describing the same alarm.

[0092] Example 2

[0093] Based on Example 1, this example provides another specific implementation method of a test method for a 35kV large-area relay protection scheme for urban rail transit power supply;

[0094] The testing method further comprises a protection failure function testing step, wherein the protection failure function testing step comprises:

[0095] As attached Figure 7 As shown, the relay protection tester 12 is used to apply a second simulated fault current to the corresponding relay protection device 1 to be tested. After receiving the second simulated fault current, the relay protection device 1 to be tested outputs a corresponding protection action signal and transmits it to the simulated switch device 5 to simulate the tripping of the protection action circuit breaker (the relay protection device 1 to be tested issues a protection action command to open the simulated switch device 5);

[0096] The test terminal sends a simulated switch failure instruction to the simulated switch device 5 via the measurement and control device 6 to control the opening and closing of the opening circuit of the simulated switch device 5 to make the protection action fail (so that the simulated switch device 5 does not open);

[0097] After receiving the protection action and the simulated switch failure instruction, the simulated switch device 5 transmits the output circuit breaker position signal to the relay protection device 1 to be tested;

[0098] The relay protection device 1 to be tested uploads the output protection action signal and the received circuit breaker position signal to the test terminal, so that the test management software determines the switch failure refusal test result after the protection action according to the protection failure function test table; wherein the circuit breaker position signal refers to the position signal output by the simulation switch device after receiving the protection action signal and the simulation switch failure instruction.

[0099] It should be noted that under normal circumstances, the relay protection device sends a tripping command to the analog switch, and the analog switch trips. However, in the case of protection failure, it is necessary to control the analog switch not to trip in order to complete the protection failure test project. Therefore, when testing the protection failure function, a failure control needs to be added to achieve the purpose of preventing the analog switch from tripping in the case of failure.

[0100] It should also be noted that the second simulated fault current is used to make the relay protection device 1 to be tested output a protection action signal, and the protection action signal is originally used to make the simulated switch device 5 actuate to simulate the tripping phenomenon of a real circuit breaker, see part of the protection action opening and inter-tripping and locking test table, which will not be repeated here;

[0101] The simulated switch failure instruction is used to make the simulated switch device 5 inoperative. After receiving the protection action and the simulated switch failure instruction, the simulated switch device 5 outputs a circuit breaker position signal when the simulated switch device 5 is inoperative, so as to simulate the failure and refusal to operate phenomenon of a real circuit breaker; the circuit breaker position signal refers to part of the switch position signal test table, which will not be repeated here.

[0102] It should also be noted that during the protection failure function test, the communication connection relationship between the relay protection tester 12, the relay protection device to be tested 1, the analog switch device 5 and the measurement and control device 6 is as shown in the attached figure. Figure 7 shown.

[0103] Example 3

[0104] Based on the above embodiment, this embodiment provides another specific implementation method of a test method for a 35kV large-area relay protection scheme for urban rail transit power supply;

[0105] In some embodiments, before the corresponding relay protection program is installed in the relay protection device 1 to be tested, the following steps are also included:

[0106] Obtain the relay protection program corresponding to the relay protection device 1 to be tested, determine the QR code corresponding to each relay protection program, and establish a binding relationship between each relay protection program and the QR code;

[0107] The device code of the relay protection device 1 to be tested is determined, and an association relationship between the device code and the two-dimensional code corresponding to each relay protection program is established.

[0108] It should be noted that the test terminal classifies and codes different relay protection devices according to the application line type of the relay protection device (referring to which subway line, such as Line 1 or Line 2), switch cabinet type, protection device model and version and other data, and determines the device code of different relay protection devices 1 to be tested (such as "XX station 35kV I section incoming line switch 301A switch cabinet protection device").

[0109] It should also be noted that the relay protection programs are uniformly uploaded to the test terminal, and the QR codes corresponding to each relay protection program are paired with the device code of the relay protection device to be tested; therefore, after the QR code on the relay protection device is recognized by the QR code scanner 4, the test terminal automatically jumps to the corresponding folder where the relay protection program is stored, and then the recognized relay protection program is imported into the relay protection device through the corresponding software.

[0110] Example 4

[0111] Based on the same inventive concept, this embodiment provides a test device for a 35kV large-area relay protection scheme for urban rail transit power supply. The implementation scheme for solving the problem provided by the test device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more test device embodiments provided below can refer to the limitations on the test method above, and will not be repeated here.

[0112] In some embodiments, the test system of the 35kV large-area relay protection scheme for urban rail transit power supply includes a test terminal pre-installed with test management software, a measurement and control device 6, a relay protection tester 12, a simulation switch device 5 for simulating a circuit breaker, and an adjustable power supply 11; wherein the test terminal is respectively communicated with each relay protection device 1 to be tested, and each relay protection device 1 to be tested is respectively communicated with the measurement and control device 6, the relay protection tester 12, the simulation switch device 5 and the adjustable power supply 11, and the measurement and control device 6 is also respectively communicated with the test terminal and the simulation switch device 5, as shown in the attached figure. Fig.10 As shown;

[0113] The test management software includes a protection program management module, a protection action and interlocking test module, a switch position signal input test module, a switch opening and closing command test module, and an alarm signal input test module, as shown in the attached Figure 1 As shown;

[0114] The protection program management module is used to determine the relay protection device 1 to be tested and to load the corresponding relay protection program into the relay protection device 1 to be tested; it is also used to receive the test table corresponding to the relay protection device 1 to be tested; wherein the test table includes the protection action opening and interlocking test table, the switch position signal test table, the opening and closing command test table and the alarm signal opening test table;

[0115] The protection action and inter-tripping and interlocking test module is used to receive the protection action signal, inter-tripping signal, inter-tripping signal and tripping information uploaded by the corresponding relay protection device in the relay protection network to be tested; it is also used to judge whether the inter-tripping and inter-tripping function of the relay protection network to be tested is normal according to the protection action opening and inter-tripping and inter-locking test table; wherein the protection action signal, the inter-tripping signal, the inter-tripping signal and the tripping information are the feedback information output by the corresponding relay protection device after the relay protection tester 12 applies the first simulated fault current to the corresponding relay protection device in the relay protection network to be tested;

[0116] The switch position signal input test module is used to send a switch position signal test instruction to the analog switch device 5 via the measurement and control device 6, so that the analog switch device 5 performs the corresponding opening and closing operation and outputs the corresponding switch position signal after receiving the switch position signal test instruction; it is also used to receive the switch position signal uploaded by the analog switch device 5 via the relay protection device to be tested, so as to perform switch position input monitoring according to the switch position signal test table, and determine the switch position signal input test result;

[0117] The opening and closing command test module is used to send opening and closing control instructions to the analog switch device 5 via the relay protection device 1 to be tested, so that the analog switch device 5 performs opening and closing operations according to the received opening and closing control instructions, and outputs the position state after the opening and closing operations; it is also used to receive the position state of the analog switch device 5 uploaded by the relay protection device 1 to be tested, so as to determine the opening and closing command test result according to the opening and closing command test table;

[0118] The alarm signal input test module is used to send a simulated alarm instruction to the relay protection device 1 under test via the measurement and control device 6, so that the relay protection device 1 under test outputs an alarm signal corresponding to the simulated alarm instruction; it is also used to receive the alarm signal uploaded by the relay protection device 1 under test, so as to determine the alarm signal input test result according to the alarm signal input test table.

[0119] It should be noted that the test system further includes a switch 9 and a communication management machine 10, which are used to realize communication interaction between various devices. For specific connection relationships, please refer to the various drawings.

[0120] In some embodiments, the test management software further includes a protection failure function test module.

[0121] The protection failure function test module is used to apply a second simulated fault current to the corresponding relay protection device 1 to be tested by using the relay protection tester 12, and the second simulated fault current is used to make the relay protection device 1 to be tested output a protection action signal to the simulated switch device 5 to simulate the tripping of the protection action circuit breaker;

[0122] It is also used to send a simulated switch failure instruction to the simulated switch device 5 via the measurement and control device 6; wherein the simulated switch failure instruction is used to control the opening and closing of the opening circuit of the simulated switch device 5 to make the protection action fail;

[0123] It is also used to receive the protection action signal and the circuit breaker position signal from the relay protection device 1 to be tested, so that the test management software can determine the switch failure refusal test result after the protection action according to the protection failure function test table; wherein the circuit breaker position signal refers to the position signal output by the simulation switch device 5 after receiving the protection action signal and the simulation switch failure instruction.

[0124] In some embodiments, the test management software further includes a relay protection device management module.

[0125] The relay protection device management module is used to obtain the relay protection program corresponding to the relay protection device to be tested, determine the QR code corresponding to each relay protection program, and establish a binding relationship between each relay protection program and the QR code; it is also used to determine the device code of the relay protection device to be tested, and establish an association relationship between the device code and the QR code corresponding to each relay protection program.

[0126] Since the relay protection devices have different brands, the designed input and switch ports are not uniform, so in order to enhance the compatibility of the platform, redundancy is designed. Therefore, in some embodiments, the test system also reserves a spare test channel, which is as shown in the attached Figure 8 As shown, other outputs of the relay protection device 1 to be tested are transmitted to the measurement and control device 6 via the signal output terminal, and then uploaded to the test management software via the measurement and control device 6 and the communication management machine 10.

[0127] In some embodiments, the test system further comprises a remote monitoring terminal, which is connected to the test terminal through IPKVM (KVM OVER IP) 8 and a wireless router. Figure 2 shown.

[0128] It should be noted that the test system is equipped with a remote monitoring system. The test platform establishes a connection channel between the test platform and the remote management device through IP KVM8 and a wireless router, and realizes remote monitoring and control functions for the test platform test, which is convenient for guiding on-site testing and realizing intelligent operation and maintenance of experimental testing.

[0129] In some embodiments, the test system further comprises a GOOSE monitoring device 7, wherein the GOOSE monitoring device 7 is respectively connected to the relay protection device 1 to be tested and the test terminal in communication. Fig. 9 shown.

[0130] It should be noted that with the application of digital communication current protection, the interlocking function is realized between 35kV medium voltage ring network systems through GOOSE (Generic Object Oriented Substation Event). The test platform monitors the operating conditions of the GOOSE system through the GOOSE monitoring device 7 to determine the influencing factors of the test results and the reliability of the operation of the protection device and the GOOSE communication interface. When the test result is abnormal, it can be determined by the alarm information content whether the abnormal test result is caused by the abnormal relay protection device or the abnormal GOOSE.

[0131] It should also be noted that the present invention also monitors the input and output functions of the protection device through the test management software and the measurement and control device 6. The command is output to the relay protection device, the relay protection device receives the output signal (equivalent to the external input for the relay protection device), the relay protection device outputs to the measurement and control device, and then to the management software of the test terminal for monitoring and judgment (the input and output of the relay protection device are in a one-to-one correspondence).

[0132] It should also be noted that the test management software can edit the test process according to the test requirements, automatically complete the test and result judgment and generate reports.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A test method for a 35kV large-area relay protection scheme for urban rail transit power supply, characterized in that: include: A test platform for relay protection devices is constructed, wherein the test platform includes a test terminal pre-installed with test management software, a measurement and control device, a relay protection tester, a simulated switch device for simulating a circuit breaker, and an adjustable power supply; wherein the test terminal is respectively connected in communication with each relay protection device to be tested, each relay protection device to be tested is respectively connected in communication with the measurement and control device, the relay protection tester, the simulated switch device, and the adjustable power supply, and the measurement and control device is also respectively connected in communication with the test terminal and the simulated switch device; When performing relay protection testing based on the test platform, execute: Determine the relay protection device to be tested, install the corresponding relay protection program for the relay protection device to be tested, and import the test table corresponding to the relay protection device to be tested into the test management software; wherein the test table includes a protection action opening and interlocking test table, a switch position signal test table, a closing and opening command test table, and an alarm signal opening and input test table; During the protection action and inter-tripping and locking test, the relay protection tester is used to apply a first simulated fault current to the corresponding relay protection device in the relay protection network to be tested, so that the corresponding relay protection device outputs a protection action signal, a locking signal, an inter-tripping signal and a tripping information; the corresponding relay protection device in the relay protection network to be tested transmits the protection action signal, the locking signal, the inter-tripping signal and the tripping information to the test terminal respectively, so that the test management software determines whether the inter-tripping and locking function of the relay protection network to be tested is normal according to the protection action opening and inter-tripping and locking test table; During the switch position signal input test, the test terminal sends a switch position signal test instruction to the analog switch device through the measurement and control device. After receiving the switch position signal test instruction, the analog switch device performs corresponding opening and closing operations and outputs a corresponding switch position signal; the relay protection device to be tested receives the switch position signal output from the analog switch device and transmits it to the test terminal, so that the test management software determines the switch position signal input test result according to the switch position signal test table; During the opening and closing command test, the test terminal sends an opening and closing control instruction to the analog switch device via the relay protection device to be tested, and the analog switch device performs the opening and closing operation according to the received opening and closing control instruction; the analog switch device transmits the position state after the opening and closing operation to the test terminal via the relay protection device to be tested, so that the test management software determines the opening and closing command test result according to the opening and closing command test table; During the alarm signal input test, the test terminal sends a simulated alarm instruction to the relay protection device to be tested through the measurement and control device. After receiving the simulated alarm instruction, the relay protection device to be tested outputs an alarm signal and uploads it to the test terminal, so that the test management software determines the alarm signal input test result according to the alarm signal input test table.

2. The testing method of the 35kV large-area relay protection scheme for urban rail transit power supply according to claim 1 is characterized in that: It also includes a protection failure function test step, which includes: The relay protection tester is used to apply a second simulated fault current to the corresponding relay protection device to be tested. After receiving the second simulated fault current, the relay protection device to be tested outputs a corresponding protection action signal and transmits it to the simulated switch device to simulate the tripping of the protection action circuit breaker; The test terminal sends a simulated switch failure instruction to the simulated switch device through the measurement and control device to control the opening and closing of the opening circuit of the simulated switch device to make the protection action fail; After receiving the protection action and the simulated switch failure instruction, the simulated switch device transmits the output circuit breaker position signal to the relay protection device to be tested; The relay protection device to be tested uploads the output protection action signal and the received circuit breaker position signal to the test terminal, so that the test management software determines the switch failure refusal test result after the protection action according to the protection failure function test table; wherein the circuit breaker position signal refers to the position signal output by the simulation switch device after receiving the protection action signal and the simulation switch failure instruction.

3. The testing method of the 35kV large-area relay protection scheme for urban rail transit power supply according to claim 1 is characterized in that: Before filling the corresponding relay protection program for the relay protection device to be tested, it also includes: Obtain the relay protection program corresponding to the relay protection device to be tested, determine the QR code corresponding to each relay protection program, and establish a binding relationship between each relay protection program and the QR code; Determine the device code of the relay protection device to be tested, and establish an association relationship between the device code and the QR code corresponding to each relay protection program.

4. A test system for a 35kV large-area relay protection scheme for urban rail transit power supply, characterized in that: It comprises a test terminal pre-installed with test management software, a measurement and control device, a relay protection tester, a simulated switch device for simulating a circuit breaker, and an adjustable power supply; wherein the test terminal is respectively connected to each relay protection device to be tested in communication, each relay protection device to be tested is respectively connected to the measurement and control device, the relay protection tester, the simulated switch device, and the adjustable power supply in communication, and the measurement and control device is also respectively connected to the test terminal and the simulated switch device in communication; The test management software includes a protection program management module, a protection action and interlocking test module, a switch position signal input test module, a switch opening and closing command test module, and an alarm signal input test module; The protection program management module is used to determine the relay protection device to be tested and to install the corresponding relay protection program for the relay protection device to be tested; it is also used to receive the test table corresponding to the relay protection device to be tested; wherein the test table includes the protection action opening and interlocking test table, the switch position signal test table, the opening and closing command test table and the alarm signal opening and input test table; The protection action and inter-tripping and interlocking test module is used to receive the protection action signal, inter-tripping signal, inter-tripping signal and tripping information uploaded by the corresponding relay protection device in the relay protection network to be tested; it is also used to judge whether the inter-tripping and inter-tripping function of the relay protection network to be tested is normal according to the protection action opening and inter-tripping and inter-locking test table; wherein the protection action signal, the inter-tripping signal, the inter-tripping signal and the tripping information are the feedback information output by the corresponding relay protection device after the relay protection tester applies the first simulated fault current to the corresponding relay protection device in the relay protection network to be tested; The switch position signal input test module is used to send a switch position signal test instruction to the analog switch device via the measurement and control device, so that the analog switch device performs corresponding opening and closing operations and outputs corresponding switch position signals after receiving the switch position signal test instruction; it is also used to receive the switch position signal uploaded by the analog switch device via the relay protection device to be tested, so as to perform switch position input monitoring according to the switch position signal test table, and determine the switch position signal input test result; The opening and closing command test module is used to send opening and closing control instructions to the analog switch device via the relay protection device to be tested, so that the analog switch device performs opening and closing operations according to the received opening and closing control instructions, and outputs the position state after the opening and closing operations; and is also used to receive the position state of the analog switch device uploaded by the relay protection device to be tested, so as to determine the opening and closing command test result according to the opening and closing command test table; The alarm signal input test module is used to send a simulated alarm instruction to the relay protection device under test via the measurement and control device, so that the relay protection device under test outputs an alarm signal corresponding to the simulated alarm instruction; it is also used to receive the alarm signal uploaded by the relay protection device under test, so as to determine the alarm signal input test result according to the alarm signal input test table.

5. The test system for the 35kV large-area relay protection scheme for urban rail transit power supply according to claim 4 is characterized in that: The test management software also includes a protection failure function test module, The protection failure function test module is used to apply a second simulated fault current to the corresponding relay protection device to be tested by using the relay protection tester, and the second simulated fault current is used to make the relay protection device to be tested output a protection action signal to the simulated switch device to simulate the tripping of the protection action circuit breaker; It is also used to send a simulated switch failure instruction to the simulated switch device through the measurement and control device; wherein the simulated switch failure instruction is used to control the opening and closing of the opening circuit of the simulated switch device to make the protection action fail; It is also used to receive a protection action signal and a circuit breaker position signal from the relay protection device to be tested, so that the test management software can determine the switch failure refusal test result after the protection action according to the protection failure function test table; wherein the circuit breaker position signal refers to the position signal output by the simulation switch device after receiving the protection action signal and the simulation switch failure instruction.

6. The test system for the 35kV large-area relay protection scheme for urban rail transit power supply according to claim 4 is characterized in that: The test management software also includes a relay protection device management module, The relay protection device management module is used to obtain the relay protection program corresponding to the relay protection device to be tested, determine the QR code corresponding to each relay protection program, and establish a binding relationship between each relay protection program and the QR code; it is also used to determine the device code of the relay protection device to be tested, and establish an association relationship between the device code and the QR code corresponding to each relay protection program.

7. The test system for the 35kV large-area relay protection scheme for urban rail transit power supply according to claim 4 is characterized in that: The test system also reserves a spare test channel.

8. The test system for the urban rail transit power supply 35kV large-area relay protection scheme according to any one of claims 4 to 7, characterized in that: It also includes a remote monitoring terminal, which is interconnected with the test terminal through IP KVM and a wireless router.

9. The test system for the 35kV large-area relay protection scheme for urban rail transit power supply according to claim 8 is characterized in that: It also includes a GOOSE monitoring device, which is communicated and interconnected with the relay protection device to be tested and the test terminal respectively.

Images