Excitation network-related test cable switching device

Abstract

The utility model discloses an excitation network-related test cable switching device, which comprises an excitation voltage test wire clamp, an excitation current test wire clamp, a test wire plugging port, a test transfer cable, a disconnectable terminal, a guide rail, an insulating bottom plate, an insulating box body and an insulating cover plate, wherein the first end of the excitation voltage test wire clamp is used for being connected with a rotor side port of a generator to be tested, the second end of the excitation voltage test wire clamp is connected with the disconnectable wiring terminal through a corresponding test wire plugging port and a test transfer cable, and the disconnectable wiring terminal can be accessed to a tester excitation voltage through the test transfer cable; the first end of the excitation current test wire clamp is used for being connected with an excitation shunt port of a generator to be tested, and the second end of the excitation current test wire clamp is connected with the disconnectable wiring end through the corresponding test wire plugging port and the test transfer cable. The device can be used in a no-load or grid-connected state of a generator, test cables can be conveniently and safely dismounted, and the operation risk of a unit due to temporary test wiring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of generator grid-related tests, in particular to an excitation grid-related test cable switching device. Background Art

[0002] Generator grid-related tests refer to a series of rigorous tests and evaluations of various performance indicators, control functions, protection systems, and grid-interaction capabilities of generators when they are about to be connected to or have been connected to the grid. These tests are designed to ensure that the generator can be connected to the power system safely, stably, and efficiently, and can meet grid specifications, standards, and dispatching requirements under various operating conditions. Grid-related tests include many tests such as no-load excitation system, modeling, and PSS.

[0003] Before the generator grid-related test, the generator excitation voltage, current, machine-end voltage, current, etc. need to be connected to the test instrument. The excitation test cables are energized after the unit is started to no-load or grid-connected. Since the entire test generally lasts a long time and the unit may still be in a no-load or grid-connected state after the test, there is a great risk of electric shock to personnel or abnormal operation of the unit when removing the test cables. If the temporary test cables are not removed and the test instruments are still connected, if the excitation voltage or excitation current cables on the test instrument side accidentally fall off, the corresponding circuit may be grounded or short-circuited, seriously threatening the safe and stable operation of the generator in no-load or grid-connected states. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes an excitation grid-related test cable switching device. After the test is terminated or ended and the unit is still in a no-load or grid-connected state, the excitation voltage, current and other circuits can be disconnected in the switching device first, and then the test instrument side cable can be removed. After the unit is completely shut down, the remaining excitation side test cable can be removed, which can avoid the risk of electric shock and ensure the safe operation of the generator.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An excitation network-related test cable switching device comprises: an excitation voltage test wire clamp, an excitation current test wire clamp, a test wire plug-in port, a test transfer cable, a detachable terminal, a guide rail, an insulating bottom plate, an insulating box and an insulating cover plate, wherein:

[0007] The first end of the excitation voltage test wire clamp is used to connect to the rotor side port of the generator to be tested, and the second end is connected to the detachable terminal through the corresponding test line plug-in port and the test transfer cable. The detachable terminal can be connected to the excitation voltage of the tester through the test transfer cable.

[0008] The first end of the excitation current test clamp is used to connect the excitation shunt port of the generator to be tested, and the second end is connected to the detachable terminal through the corresponding test line plug-in port and the test transfer cable. The detachable terminal can be connected to the excitation current of the tester through the test transfer cable.

[0009] The separable terminal is arranged on a guide rail, the guide rail is arranged on an insulating bottom plate, and the insulating bottom plate, the insulating box body and the insulating cover plate are connected in sequence.

[0010] Furthermore, the rotor side port of the generator to be tested to which the first end of the excitation voltage test clamp is connected includes: positive and negative copper busbars in the excitation system cabinet of the generator to be tested.

[0011] Furthermore, the excitation shunt port of the generator to be tested to which the first end of the excitation current test clamp is connected includes: front and rear ends of the excitation shunt.

[0012] Furthermore, the test line plug port is arranged on the side of the insulation box.

[0013] Furthermore, at least two disconnectable terminals are provided.

[0014] Furthermore, the surface of the guide rail is sprayed with insulating paint.

[0015] Furthermore, the guide rail is fixed to the insulating bottom plate by screws.

[0016] Furthermore, the insulating cover plate is movably connected to the insulating box body.

[0017] Furthermore, the insulating cover is rotatably arranged on the insulating box.

[0018] Furthermore, the insulating cover is arranged on the insulating box in a push-pull manner.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model proposes an excitation grid-related test cable switching device. After the test is terminated or finished and the unit is still in a no-load or grid-connected state, the excitation voltage, current and other circuits can be disconnected in the switching device first, and then the test instrument side cable can be removed. After the unit is completely shut down, the remaining excitation side test cable can be removed, which can avoid the risk of electric shock and ensure the safe operation of the generator.

[0021] 2. The utility model can be used when the generator is unloaded or grid-connected, and the test cable can be removed conveniently and safely, reducing the operating risk of the unit due to temporary test wiring.

[0022] 3. The various components of the utility model can be freely disassembled and assembled, which is convenient for later maintenance and personalized design. It is simple, reliable and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a structural schematic diagram of an excitation grid-related test cable switching device.

[0024] Figure numerals: 1-excitation voltage test clamp, 2-excitation current test clamp, 3-test line plug port, 4-test transfer cable, 5-disconnectable terminal, 6-guide rail, 7-insulating bottom plate, 8-insulating box, 9-insulating cover plate, A-connect to the excitation voltage of the test instrument, B-connect to the excitation current of the test instrument DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model, that is, the embodiments described are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the utility model.

[0026] like Figure 1 As shown, this embodiment provides an excitation network test cable switching device, including an excitation voltage test clamp 1, an excitation current test clamp 2, a test line plug port 3, a test transfer cable 4, a detachable terminal 5, a guide rail 6, an insulating bottom plate 7, an insulating box 8 and an insulating cover 9, wherein:

[0027] The first end of the excitation voltage test clamp 1 is used to connect the positive and negative poles on the rotor side of the generator to be tested (the positive and negative copper bars in the magnetic system cabinet), and the second end is connected to the detachable terminal 5 through the corresponding test line plug-in port 3 and the test transfer cable 4. The detachable terminal 5 can be connected to the excitation voltage of the tester through the test transfer cable 4.

[0028] The first end of the excitation current test clamp 2 is used to connect the front and rear ends of the excitation shunt of the generator to be tested, and the second end is connected to the detachable terminal 5 through the corresponding test line plug-in port 3 and the test transfer cable 4. The detachable terminal 5 can be connected to the excitation current of the tester through the test transfer cable 4.

[0029] The disconnectable terminal 5 is arranged on the guide rail 6, the guide rail 6 is arranged on the insulating bottom plate 7, and the insulating bottom plate 7, the insulating box 8 and the insulating cover plate 9 are connected in sequence. Among them, the disconnectable terminal 5 is used to transfer the excitation voltage and current test cables, and the test cables are divided into the excitation voltage, the excitation current and some connecting cables; the insulating cover plate 9 can prevent foreign objects from falling in.

[0030] Based on this, the assembly method and working principle of the excitation grid-related test cable adapter of this embodiment are as follows:

[0031] 1. Fix the guide rail 6 (screws may be used) on the insulating base plate 7, and install the disconnectable terminal 5 on the guide rail 6;

[0032] 2. Fix the head of the excitation voltage test wire clamp 1 to the positive and negative poles on the generator rotor side (the positive and negative copper bars in the excitation system cabinet), and insert the tail of the excitation voltage test wire clamp 1 into the corresponding test line plug-in port 3; fix the head of the excitation current test wire clamp 2 to the front and rear ends of the excitation shunt, and insert the tail of the excitation current test wire clamp 2 into the corresponding test line plug-in port 3;

[0033] 3. Connect the front and rear ends of all test transfer cables 4 to the corresponding test line plug-in ports 3 and the detachable terminal 5 respectively;

[0034] 4. Connect all the test transfer cables 4 on the right side of the insulation box 8 to the corresponding interfaces of the test instrument;

[0035] 5. Close the insulating cover 9 of the insulating box 8 to prevent foreign matter from falling in;

[0036] 6. After the test is completed and the unit is in no-load or grid-connected state, first open the insulation cover 9, use an insulation screwdriver to cut open all the disconnectable terminals 5 (to disconnect the test instrument from the excitation equipment), pull out the test transfer cable 4 on the right side of the insulation box 8 in turn (the connection from the transfer device to the test instrument side), restore the insulation cover 9, and place the insulation box 8 in the excitation system cabinet to prevent accidental contact by personnel;

[0037] 7. After the unit is completely shut down, remove the excitation voltage test clamp 1 and the excitation current test clamp 2 in the excitation system cabinet, and move all the equipment of the transfer device away from the site.

[0038] Preferably, the test line plug-in port 3 can be arranged on the side of the insulating box 8, and at least two disconnectable terminals 5 are provided.

[0039] Preferably, the guide rail 6 is made of metal, and the surface is sprayed with insulating paint; the insulating bottom plate 7 can be made of epoxy resin insulating board, and the insulating box 8 can be made of acrylic material.

[0040] Preferably, the insulating cover plate 9 is movably connected to the insulating box body 8. More preferably, the insulating cover plate 9 is rotatably arranged on the insulating box body 8, or the insulating cover plate 9 is push-pull arranged on the insulating box body 8.

[0041] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A cable switching device for excitation grid-related test, characterized in that: include: An excitation voltage test wire clamp (1), an excitation current test wire clamp (2), a test wire plug-in port (3), a test transfer cable (4), a detachable terminal (5), a guide rail (6), an insulating base plate (7), an insulating box (8), and an insulating cover plate (9); The first end of the excitation voltage test clamp (1) is used to connect to the rotor side port of the generator to be tested, and the second end is connected to the detachable terminal (5) through the corresponding test line plug-in port (3) and the test transfer cable (4), and the detachable terminal (5) can be connected to the excitation voltage of the tester through the test transfer cable (4); The first end of the excitation current test clamp (2) is used to connect to the excitation shunt port of the generator to be tested, and the second end is connected to the detachable terminal (5) through the corresponding test line plug-in port (3) and the test transfer cable (4), and the detachable terminal (5) can be connected to the excitation current of the tester through the test transfer cable (4); The separable terminal (5) is arranged on a guide rail (6), the guide rail (6) is arranged on an insulating base plate (7), and the insulating base plate (7), the insulating box (8) and the insulating cover plate (9) are connected in sequence.

2. The excitation grid-related test cable switching device according to claim 1 is characterized in that: The rotor side port of the generator to be tested to which the first end of the excitation voltage test clamp (1) is connected comprises: positive and negative copper busbars in the excitation system cabinet of the generator to be tested.

3. The cable switching device for excitation grid-related testing according to claim 1 is characterized in that: The excitation current test clamp (2) has a first end connected to an excitation shunt port of the generator to be tested, including front and rear ends of the excitation shunt.

4. The excitation grid-related test cable switching device according to claim 1 is characterized in that: The test line plug-in port (3) is arranged on the side of the insulating box (8).

5. The cable switching device for excitation grid-related testing according to claim 1 is characterized in that: At least two disconnectable terminals (5) are provided.

6. The cable switching device for excitation grid-related testing according to claim 1 is characterized in that: The surface of the guide rail (6) is sprayed with insulating paint.

7. The excitation grid-related test cable switching device according to claim 1 is characterized in that: The guide rail (6) is fixed to the insulating bottom plate (7) by means of screws.

8. The cable switching device for excitation grid-related testing according to claim 1 is characterized in that: The insulating cover plate (9) is movably connected to the insulating box body (8).

9. The cable switching device for excitation grid-related testing according to claim 8 is characterized in that: The insulating cover plate (9) is rotatably arranged on the insulating box body (8).

10. The cable switching device for excitation grid-related testing according to claim 8, characterized in that: The insulating cover plate (9) is arranged on the insulating box body (8) in a push-pull manner.

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