Portable general testboard for relay protection device of power supply system
By designing a general test bench for relay protection devices in portable power supply system, the existing testing methods are complicated and unsafe, and flexible, safe and efficient full-function testing of relay protection devices is achieved.
Patent Information
- Application Number
- CN202420682605.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-03
AI Technical Summary
The testing methods of the relay protection devices of the existing power supply system are cumbersome and unsafe. The platform replacement method affects the safety of the equipment. The temporary wiring method is inefficient, relies on personal skills and has great risks.
A common test bench for relay protection devices for portable power supply systems is designed. It uses 220V AC input and combines 24V and 110V power modules to build two analog quantity acquisition loops of AC and DC. The closing conditions are defined through the dial switch to achieve the purpose of each Full-functional test of relay protection devices.
It improves the flexibility and safety of relay protection device testing, avoids the equipment safety risks of platform replacement method, inefficiency and personal skills dependence of temporary wiring method, and achieves convenient and efficient full-function testing.
Smart Images
Figure CN222506466U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of testing instruments, in particular to a universal testing platform for a portable power supply system relay protection device. Background Art
[0002] Relay protection device is a set of automated measures and equipment that can send warning signals to operating personnel on duty in a timely manner, or directly send tripping commands to the controlled circuit breakers to terminate the development of these events when power components (such as generators, lines, etc.) in the power system or the power system itself fail and endanger the safe operation of the power system.
[0003] With the continuous expansion of the scale of modern power systems and the continuous improvement of the reliability and efficiency requirements for power system operation and management, the safety of relay protection devices has become more prominent. The existing power supply system relay protection devices need to undergo preliminary work such as function verification, pre-installation of programs, and parameter setting before use. The testing work of power supply professionals has become more frequent and complex.
[0004] There are two common practices at present. One is the platform replacement method, which is to remove the original relay protection device of the same type of equipment on the power supply training platform and replace it with the test device for testing;
[0005] The defects are:
[0006] The original relay protection device must be removed and the device to be tested must be installed again. Repeated disassembly and installation operations are cumbersome and affect equipment safety. The platform equipment cannot be moved.
[0007] A temporary wiring method in which a test circuit that meets the operating conditions of the device is temporarily connected on site to test the relay protection device.
[0008] The defects are: 1. Low efficiency and long time consumption, unable to meet the full function verification. 2. High reliance on the personal skills of the tester. 3. High risk to the device under test. Utility Model Content
[0009] In order to overcome the defects of the above prior art, the purpose of the utility model is to provide a portable power supply system relay protection device universal test bench, which adopts universal voltage level 220V AC input, utilizes the power output structure characteristics of two types of power modules, 24V and 110V, and combines the passive dial switch node of the test bench to manually define the actual point position to open the closing condition, and at the same time builds two types of AC and DC analog quantity acquisition loops to meet the conditions for powering on, closing permission opening, protection verification, and opening and closing of universal relay protection devices of various manufacturers of DC1500V DC system, 35kV high voltage system, and main substation 110kV system. At the same time, it has the ability to provide a stable operating environment for the relay protection device after powering on. The universal test bench introduces a reliable grounding terminal to access each power module and protection device. Through testing, it can quickly and accurately reflect the display of the protection device panel, whether each indication is normal, and whether other functional tests are normal.
[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0011] A portable universal test bench for relay protection devices of a power supply system, comprising a power circuit breaker, a power module, a power expansion terminal, an operation box for a universal test bench for protection devices, a terminal block, a switching relay, a tripping relay and a current transmitter;
[0012] The power circuit breaker introduces a 220V total AC power supply, and provides the required 110V and 24V DC power for the protection device through a power module transformer. The power circuit breaker is connected to the power module, and the power module is connected to the terminal block through the power expansion terminal. The terminal block provides stable DC power for the protection device and 24V DC power for the universal test bench operation box of the protection device. The output end of the terminal block is connected to the input end of the universal test bench operation box of the protection device, and the output end of the universal test bench operation box of the protection device is respectively connected to the input ends of the closing relay, the tripping relay and the current transmitter.
[0013] The power circuit breakers include an AC 220V main input power circuit breaker 1FU, a DC 24V power output circuit breaker 2FU, and a DC 110V power output circuit breaker 3FU.
[0014] The power module includes a 24V power module T1 and a 110V power module T2. The power module receives the total input of the external AC 220V power supply through the circuit breaker 1FU and divides it into two paths in parallel. One path, the input power module T1, converts the AC power into DC 24V, and the other path, the input power module T2, converts the AC power into DC 110V, and the power module is grounded.
[0015] The power extension terminal includes a 24V positive power supply L+, a 24V negative power supply L-, a 110V positive power supply L+ and a 110V negative power supply L-; the 24V positive power supply L+ is connected to the X01 junction box, the 24V negative power supply L- is connected to the X02 junction box, the 110V positive power supply L+ is connected to the X03 junction box and the 110V negative power supply L- is connected to the X04 junction box;
[0016] The terminal blocks include a 24V power supply X1 terminal block for each indication operation of the universal test bench operation box of the protection device, a 24V power supply X2 terminal block for the DC traction system protection device, a 110V power supply X3 terminal block for the AC high voltage system protection device, a current test terminal block XT0 for AC current transformer connection, and a current test terminal block XT1 for DC traction system input;
[0017] Among them, the X1 terminal block provides DC power for the test bench operation box; the X2 and X3 terminal blocks are reserved for providing power to the protection device; the XT0 terminal block is a connection terminal block for the AC system protection device verification; the XT1 terminal block is a connection terminal block for the DC system protection device verification;
[0018] The 24V power supply X1 terminal block provides control power for the universal test bench operation box of the protection device. The 24V protection device power X2 terminal block and the 110V protection device power X3 terminal block provide special protection power for the protection device. The AC system protection device ultimately performs AC system protection verification through terminal block XT0, and the DC system protection device ultimately performs DC system protection verification through terminal block XT1.
[0019] The opening and closing relay is a common opening and closing relay KA1 for DC traction system and AC high voltage system; the tripping relay is a tripping relay KA2 for AC high voltage system;
[0020] The current transmitter is a current type measurement transmitter U9F1 for current collection in a DC traction power supply system.
[0021] The universal test bench operation box of the relay protection device includes 12 sets of dial switches, a power indicator light, an opening and closing indicator light, a buzzer, a reset button, an opening and closing knob, and a simulated closing sound;
[0022] The 24V power supply X1 terminal block is used for the indication operation of the universal test bench operation box of the relay protection device. The X1:1, X1:2, X1:3, and X1:4 terminals are introduced with a 24V positive power supply and short-circuited at the same time, providing a stable 24V positive power supply for each component on the test bench operation box. X1:5 is the opening circuit indication and buzzer transfer terminal on the test bench operation box. X1:6 is the closing circuit indication and simulation closing sound transfer terminal on the test bench operation box. The X1:7, X1:8, X1:9, and X1:10 terminals are introduced with a 24V negative power supply and short-circuited at the same time, providing a stable 24V negative power supply for each component on the test bench operation box.
[0023] The universal test bench operation box of the relay protection device is connected to the 24VX1 terminal block through a pluggable switch indication aviation plug, and 12 groups of dip switches are connected to the 24V protection device power X2 terminal block or the 110V protection device power X3 terminal block through a pluggable dip node aviation plug, so that a common positive power supply is introduced to the dip switches, and then the dip switch nodes are changed to the opening and closing permission points of different protection devices.
[0024] The relay protection device universal test bench operation box is connected to the 24V X1 terminal block through a pluggable switch indicating aviation plug, and the 12 groups of dial switches on the test bench operation box are connected to the 24V protection device power X2 terminal block or the 110V protection device power X3 terminal block through a pluggable dial node aviation plug. A common positive power supply is introduced to the dial switch, and then the actual meaning of each dial switch is flexibly defined according to the closing permission needs of the protection device itself, and reconfigured, so as to open the protection device closing permission point, which solves the universality problem of protection device testing. The relay protection device universal test bench operation box replaces the primary high-voltage switch cabinet, and the SA knob on it is used to command the KA1 opening and closing relay and the KA2 AC protection device opening / tripping relay to be energized and de-energized, so as to simulate the opening and closing operation, indication, sound and light alarm and other functions on the prototype switch cabinet of the substation, and at the same time, the protection verification test of the protection device is realized through the DC system current transmitter U9F1 and the AC system current test terminal block, and finally the full-function test of various protection devices is realized.
[0025] The DC traction system 24V protection device uses an X2 terminal block, which uses a rail-type plug-in terminal block. The X2:1, X2:2, and X2:3 terminals are connected to a 24V positive power supply and are short-circuited at the same time. X2:1 and X2:2 provide a stable 24V positive power supply for each board of the DC traction system 24V protection device. X2:3 and X2:4 are a group of protection device opening and closing terminals, which allow the opening and closing relay KA1 to be energized and de-energized, thereby controlling the opening and closing operation on the test bench operation box. X2:5 and X2:6 are a group of current transmitter analog current output terminals, which output voltage signals to the protection device to simulate the DC current of the protection device. X2:7 and X2:8 are the opening and closing knob input terminals of the test bench operation box, through which the opening and closing commands are input to the protection device. X2:9, X2:10, X2:11, and X2:12 terminals introduce 24V negative power supply and short-circuit at the same time to provide a stable 24V negative power supply for each board of the 24V protection device of the DC traction system.
[0026] The AC high voltage system 110V protection device uses an X3 terminal block, which uses a rail-type docking plug-in terminal block. The X3:1, X3:2, X3:3, and X3:4 terminals are connected to a 110V positive power supply and short-circuited at the same time, providing a stable 110V positive power supply for each board of the AC high voltage system 110V protection device. X3:5 and X3:6 are a group of protection device closing permission node output terminals, X3:7 and X3:8 are a group of protection device protection trip node output terminals, X3:9 and X3:10 are a group of standby normally closed nodes drawn from the protection device, which are used in the closing and opening circuit of the general test bench operation box of the protection device, and the X3:11, X3:12, X3:13, and X3:14 terminals are connected to a 110V negative power supply and short-circuited at the same time, providing a stable 110V negative power supply for each board of the AC high voltage system 110V protection device.
[0027] The DC traction system input uses the XT1 current test terminal block, the outer sides of the XT1:1 and XT1:2 terminals are short-circuited, and the inner side of the terminals are connected to the current transmitter U9F1 for current collection of the DC traction power supply system. When the relay protection instrument is connected to the XT1:1 and XT1:2 terminals, the XT1 current test terminal block connector is pulled out to isolate the short-circuit point. At this time, the relay protection instrument can simulate the DC current input of the protection device by adding a millivolt voltage on the inner side, thereby performing protection verification on the protection device.
[0028] Beneficial effects of the utility model:
[0029] The utility model improves the flexibility of relay protection device testing. The universal test bench is small in size and highly flexible, meets the requirements of portability and mobility, avoids the drawback of the first platform replacement method that is fixed and cannot be moved, and meets the needs of on-site testing of relay protection devices.
[0030] The utility model solves the universality of relay protection device testing. The universal test bench integrates commonly used power supplies of various levels. The biggest feature is that it can be flexibly defined and reconfigured according to the actual meaning of the input and output points of various protection devices applied on site to meet the protection device testing requirements of voltage levels.
[0031] Ensure the safety of relay protection device testing. The circuit of this universal test bench is relatively fixed, avoiding the risks brought by the second type of temporary jumper circuit, and ensuring the safety of personnel and devices during the test process.
[0032] The utility model satisfies the determination of the function of the protection device. Through verification, the universal test bench is suitable for basic function tests of various protection devices in the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 This is the schematic diagram of the DC 24V and 110V input circuit structure.
[0034] Figure 2 It is a schematic diagram of the structure of the operating box of the universal test bench for protection devices.
[0035] Figure 3 It is the circuit structure schematic diagram of the DIP switch in the universal test bench operation box of the protection device.
[0036] Figure 4 It is the secondary schematic diagram of the operating box of the universal test bench for protection devices. DETAILED DESCRIPTION
[0037] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0038] Figure 1 This is the total power supply circuit diagram of the universal test bench for relay protection devices, which provides the required 110V and 24V DC power for the protection device, and also provides DC 24V control power for the test bench operation box; Figure 2 This is a schematic diagram of the test bench operation box structure. Figure 4 This is the secondary schematic diagram of the test bench operation box, and Figure 3 This is the schematic diagram of the circuit structure of 12 groups of DIP switches on the test bench operating box.
[0039] Reference Figure 1, the external AC 220V power supply is input through the circuit breaker 1FU, and is divided into two paths in parallel. One path is input into the power module T1 to convert the AC power into 24V, and then it is output through the DC 24V power circuit breaker 2FU. The 24V positive power supply L+ is connected to the X01 junction box expansion terminal, and the 24V negative power supply L- is connected to the X02 junction box expansion terminal. The power is led from the 24V expansion terminal block to the X1 terminal block for the universal test bench operation box of the portable power supply system relay protection device, the X2 terminal block for all 24V protection devices, and the DC traction power supply system current sampling The current type measuring transmitter U9F1 for collecting power, the relay KA1 for supplying power to the opening and closing circuit, and the relay KA2 for supplying power to the tripping output of the AC high voltage system protection device; another line is connected in parallel downward as shown by the arrow to input the power supply module T2 to convert the AC power into 110V, and after output, it passes through the DC 110V power circuit breaker 3FU, and respectively connects the 110V positive power supply L+ to the X03 junction box expansion terminal, and the 110V negative power supply L- to the X04 junction box expansion terminal, and leads the power from the 110V expansion terminal block to the X3 terminal block that supplies power to all 110V protection devices.
[0040] Reference Figure 2 , portable power supply system relay protection device universal test bench operation box, the test bench dedicated 24VX1 terminal block is connected to this operation box through the switch indication aviation plug, and it is equipped with simulated circuit breaker opening and closing function test, circuit breaker closing position, tripping position, operation power supply indication, simulated circuit breaker closing sound, circuit breaker tripping sound and light alarm and reset functions, etc., to achieve the circuit breaker simulation test with the same function as the substation switch cabinet. This operation box is also equipped with 12 groups of passive node dial switches, which can be flexibly defined according to the power supply introduced by different protection devices, and then opened through the dial node aviation plug to the protection device to close the protection device, allowing the multi-function protection device to be realized It can be tested; when testing the protection device, the universal test bench of the relay protection device is connected to the test protection device and the circuit breaker is energized. The power indicator light of the test bench operation box is on, and the defined dip switch is turned to open the closing permission point of the protection device. After the closing of the protection device is allowed, the opening and closing knob is operated to give the protection device a closing signal. The closing of the protection device closes the test bench operation box, and the closing indicator light is on. At the same time, the circuit breaker closing sound simulates the closing sound action. When the opening and closing knob is operated to open the circuit, the signal is turned into the protection device to light the opening indicator light of the test bench operation box, and the buzzer is activated at the same time, which can be reset by the reset button of the test bench operation box.
[0041] Reference Figure 3 , test the closing allowable opening points of the protection device through the DIP switch on the universal test bench operation box of the relay protection device. First, connect the DIP node aviation plug to the positive power supply of the protection device to Figure 3The common end, that is, the 24V positive power supply is introduced when testing the 24V power supply protection device, and the 110V positive power supply is introduced when testing the 110V power supply protection device. Only one protection device is tested each time, so only one corresponding power supply is introduced each time. At this time, the normally open point is closed through the dip switch to open the corresponding positive power supply point to the protection device. When all the locking points are turned on, the protection device will issue a closing permission signal, and the closing operation can be performed through the protection device.
[0042] The 24V power supply X1 terminal block for the universal test bench operation box of the relay protection device is used for various indication operations. The X1:1, X1:2, X1:3, and X1:4 terminals are short-circuited to introduce a 24V positive power supply, and the X1:7, X1:8, X1:9, and X1:10 terminals are short-circuited to introduce a 24V negative power supply, providing a stable 24V power supply for various components on the test bench operation box. X1:5 is the opening circuit indication and buzzer transfer terminal on the test bench operation box, and X1:6 is the closing circuit indication and simulation closing sound transfer terminal on the test bench operation box, which ultimately constitutes the power supply circuit on the test bench operation box; the DC traction system 24V protection device power X2 terminal block, X2:1, X2:2, The X2:3 terminal is short-circuited to introduce a 24V positive power supply, and the X2:9, X2:10, X2:11, and X2:12 terminals are short-circuited to introduce a 24V negative power supply to provide a stable 24V power supply for each board of the DC traction system protection device. In order to complete the complete test of the DC traction system protection device, it is also necessary to introduce the protection device opening and closing output terminals at points X2:3 and X2:4 to energize and de-energize the opening and closing relay KA1, thereby controlling the opening and closing operations on the universal test bench operation box of the relay protection device. X2:5 and X2:6 are current transmitter analog current output terminals, which output voltage signals to the protection device to simulate the DC current of the protection device. X2:7 and X2:8 are universal test benches for relay protection devices. The operation box's opening and closing knob input terminal is used to input the opening and closing commands to the protection device, ultimately achieving a full test of the DC traction system protection device; the AC high-voltage system 110V protection device uses the X3 terminal block, and the X3:1, X3:2, X3:3, and X3:4 terminals are short-circuited to introduce a 110V positive power supply, and the X3:11, X3:12, X3:13, and X3:14 terminals are short-circuited to introduce a 110V negative power supply, providing a stable 110V power supply for each panel of the AC high-voltage system protection device. In order to complete the complete test of the AC high-voltage system protection device, it is also necessary to introduce the points X3:5 and X3:6 protection device closing permission node opening terminals, and the X3:7 and X3:8 protection device protection trip terminals. The gate node opening terminal, X3:9 and X3:10 are drawn from the standby normally closed node of the protection device, and are used in the opening and closing circuit of the operation box of the universal test bench of the relay protection device, and finally realize the full test of the AC high-voltage system protection device; because the universal test bench of the relay protection device only tests one protection device at a time, and X2 and X3 use the guide rail type docking plug-in terminal block, the corresponding terminal block is plugged in for the protection tested; the AC high-voltage system input uses the XT0 current test terminal block, and any terminal among XT0:1, XT0:2, XT0:3, XT0:4, XT0:5, XT0:6, XT0:7, XT0:8 can be selected to connect the relay protection instrument to increase the amount of the protection device for debugging;The DC traction system input uses the XT1 current test terminal block, the outer sides of the XT1:1 and XT1:2 terminals are short-circuited, and the inner side of the terminals are connected to the current transmitter U9F1 for current collection of the DC traction power supply system. When the relay protection instrument is connected to the XT1:1 and XT1:2 terminals, the XT1 current test terminal block connector is pulled out to isolate the short-circuit point. At this time, the relay protection instrument can add a millivolt voltage on the inner side to simulate the DC current input of the protection device, thereby performing protection verification on the protection device. ;
[0043] Reference Figure 4 , the wiring circuit structure schematic diagram of the internal installation of the universal test bench for the relay protection device, when the test bench operation box is connected to the 24V power supply, the power indicator HL1 lights up, when testing the DC traction system protection device, first operate the SA switch to enter the closing command, at this time the protection device closing permission command is issued, so that the J5-1 and J8-1 nodes are turned on, the KA1 opening and closing relay is energized, and the simulated closing sound HA2 is energized to simulate the closing sound, the HL2 opening and closing indicator light closing indication lights up, and the simulation closing is successful. When the DC system protection device receives the SA opening command or the current transmitter U9F1 outputs the protection device current through the relay protection instrument to reach the protection device tripping current, the protection trips out, so that the J5-1 and J8-1 nodes are disconnected, the KA1 opening and closing relay loses power, the buzzer on the test bench operation box sounds an alarm, and the HL2 opening and closing indicator light opening indication lights up, and the buzzer alarm can be reset through the SD reset button. When testing the AC high-voltage protection device, first operate the SA switch (in the virtual box) to input the closing command, and after the protection device closes and allows the command P10 and P11 nodes, the KA1 opening and closing relay is energized, and the subsequent closing signal is the same as the DC protection device; when the AC system protection device receives the SA (in the virtual box) opening command or the protection device trips, the R7 node is opened to energize the KA2 relay, and the KA2 normally closed nodes 11 and 12 are opened, and finally the KA1 opening and closing relay is de-energized, and the subsequent opening / tripping signal is the same as the DC protection device; the SA in the virtual box : Nodes 13, 14, 23, and 24 are the same node as SA outside the virtual box. The difference is that the command of the SA node outside the virtual box is turned on the DC traction system protection device, while the command of the SA node inside the virtual box is turned on the AC high-voltage protection device, and the SA opening command inside the virtual box is connected in series to the protection device's own R1 normally closed node, and the SA closing command is connected in series to the protection device's own B05 closing permission node. Since one protection device is tested each time, it is ensured that a disconnection point is formed when personnel make a wrong connection and two sets of command signals are turned on at the same time, thereby increasing the reliability of the universal test bench for relay protection devices.
[0044] Working principle of this utility model:
[0045] The power module receives the external AC 220V power supply through the circuit breaker 1FU and divides it into two paths in parallel. One path is input to the power module T1 to convert the AC power into DC 24V, and the other path is input to the power module T2 to convert the AC power into DC 110V, providing the required stable 24V or 110V DC power for various protection devices. The universal test bench operation box of the relay protection device indicates the aviation plug and 24V through the pluggable switch At the same time, 12 groups of dip switches on the test bench operation box are connected to the 24V protection device power X2 terminal block or the 110V protection device power X3 terminal block through the pluggable dip node aviation plug, so as to introduce a common positive power supply for the dip switches, and then flexibly define the actual meaning of each dip switch according to the closing permission needs of the protection device itself, and reconfigure it, so as to open the closing permission point of the protection device, thereby solving the universality problem of the protection device test. The universal test bench operation box of the relay protection device replaces the primary high-voltage switch cabinet, and the SA knob command on it is used to open the KA1 opening and closing relay and the KA2 AC protection device opening / tripping relay to gain power and lose power, so as to simulate the opening and closing operation, indication, sound and light alarm and other functions on the prototype switch cabinet of the substation, and realize the protection verification test of the protection device through the DC system current transmitter U9F1 and the AC system current test terminal block, and finally realize the full-function test of various protection devices.
Claims
1. A portable universal test bench for relay protection devices of power supply systems, characterized in that: Including power circuit breaker, power module, power expansion terminal, protection device universal test bench operation box, terminal block, opening and closing relay, tripping relay and current transmitter; The power circuit breaker introduces a 220V total AC power supply, and provides the required 110V and 24V DC power for the protection device through a power module transformer. The power circuit breaker is connected to the power module, and the power module is connected to the terminal block through the power expansion terminal. The terminal block provides stable DC power for the protection device and 24V DC power for the universal test bench operation box of the protection device. The output end of the terminal block is connected to the input end of the universal test bench operation box of the protection device, and the output end of the universal test bench operation box of the protection device is respectively connected to the input ends of the closing relay, the tripping relay and the current transmitter.
2. A portable universal test bench for relay protection devices of power supply systems according to claim 1, characterized in that: The power circuit breakers include an AC 220V main input power circuit breaker 1FU, a DC 24V power output circuit breaker 2FU, and a DC 110V power output circuit breaker 3FU.
3. A portable universal test bench for relay protection devices of a power supply system according to claim 1, characterized in that: The power module includes a 24V power module T1 and a 110V power module T2. The power module receives the total input of the external AC 220V power supply through the circuit breaker 1FU and divides it into two paths in parallel. One path, the input power module T1, converts the AC power into DC 24V, and the other path, the input power module T2, converts the AC power into DC 110V, and the power module is grounded.
4. A portable universal test bench for relay protection devices of a power supply system according to claim 1, characterized in that: The power extension terminal includes a 24V positive power supply L+, a 24V negative power supply L-, a 110V positive power supply L+ and a 110V negative power supply L-; the 24V positive power supply L+ is connected to the X01 junction box, the 24V negative power supply L- is connected to the X02 junction box, the 110V positive power supply L+ is connected to the X03 junction box and the 110V negative power supply L- is connected to the X04 junction box; The terminal blocks include a 24V power supply X1 terminal block for each indication operation of the universal test bench operation box of the protection device, a 24V power supply X2 terminal block for the DC traction system protection device, a 110V power supply X3 terminal block for the AC high voltage system protection device, a current test terminal block XT0 for AC current transformer connection, and a current test terminal block XT1 for DC traction system input; Among them, the X1 terminal block provides DC power to the test bench operation box; the X2 and X3 terminal blocks are reserved for providing power to the protection device; the XT0 terminal block is the connection terminal block for checking the AC system protection device; and the XT1 terminal block is the connection terminal block for checking the DC system protection device.
5. The portable universal test bench for relay protection device of power supply system according to claim 1 is characterized in that: The opening and closing relay is a common opening and closing relay KA1 for DC traction system and AC high voltage system; the tripping relay is a tripping relay KA2 for AC high voltage system; The current transmitter is a current type measurement transmitter U9F1 for current collection in a DC traction power supply system.
6. A portable universal test bench for relay protection devices of a power supply system according to claim 5, characterized in that: The universal test bench operating box of the protection device includes 12 sets of DIP switches, a power indicator light, an opening and closing indicator light, a buzzer, a reset button, an opening and closing knob, and a simulated closing sound; The protection device universal test bench operation box uses a 24V power supply X1 terminal block for each indication operation, and the X1:1, X1:2, X1:3, and X1:4 terminals are introduced with a 24V positive power supply and short-circuited at the same time, providing a stable 24V positive power supply for each component on the test bench operation box, X1:5 is the opening circuit indication and buzzer transfer terminal on the test bench operation box, X1:6 is the closing circuit indication and simulation closing sound transfer terminal on the test bench operation box, and the X1:7, X1:8, X1:9, and X1:10 terminals are introduced with a 24V negative power supply and short-circuited at the same time, providing a stable 24V negative power supply for each component on the test bench operation box; The protection device universal test bench operation box is connected to the 24V X1 terminal block through a pluggable switch indication aviation plug, and 12 groups of dip switches are connected to the 24V protection device power X2 terminal block or the 110V protection device power X3 terminal block through a pluggable dip node aviation plug, so as to introduce a common positive power supply for the dip switches; The protection device universal test bench operation box is connected to the 24V X1 terminal block through a pluggable switch indication aviation plug, and at the same time, 12 groups of dip switches on the test bench operation box are connected to the 24V protection device power X2 terminal block or the 110V protection device power X3 terminal block through a pluggable dip node aviation plug.
7. A portable universal test bench for relay protection devices of a power supply system according to claim 5, characterized in that: The DC traction system 24V protection device power X2 terminal block uses a guide rail type plug-in terminal block; The AC high voltage system 110V protection device uses an electrical X3 terminal block, which uses a guide rail type docking plug-in terminal block; The DC traction system input uses the XT1 current test terminal block, the outer sides of the XT1:1 and XT1:2 terminals are short-circuited, and the inner side wiring is led to the current transmitter U9F1 for current collection of the DC traction power supply system.