CN219829960U - Test system for gas-insulated switchgear - Google Patents
Test system for gas-insulated switchgear Download PDFInfo
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- CN219829960U CN219829960U CN202320489021.9U CN202320489021U CN219829960U CN 219829960 U CN219829960 U CN 219829960U CN 202320489021 U CN202320489021 U CN 202320489021U CN 219829960 U CN219829960 U CN 219829960U
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- 238000012360 testing method Methods 0.000 title claims abstract description 152
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims description 7
- 230000003449 preventive effect Effects 0.000 abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 5
- 239000010935 stainless steel Substances 0.000 abstract description 5
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- 238000000034 method Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model provides a test system of a gas-insulated switchgear. The first gas-insulated switchgear and the second gas-insulated switchgear are both electrically connected to the bus bar, and the first gas-insulated switchgear is electrically connected to the bus bar as a conductor in the case of the first gas-insulated switchgear being a lead of the second gas-insulated switchgear. The gas-insulated switchgear is metal-sealed switchgear, all high-voltage components are sealed in a gas chamber welded by stainless steel, SF6 gas is filled in each separated gas chamber, except for a cable connection position, other components have no bare dew point, and preventive tests can be completed by connecting two ends, so that the gas-insulated switchgear is used as a group, the gas-insulated switchgear is used as a conductor (lead) of a second gas-insulated switchgear, the cable connection positions of the two gas-insulated switchgears are used as the head end and the tail end of a test connection, and the corresponding tests can be completed by avoiding air suction and removing the components.
Description
Technical Field
The utility model relates to the technical field of gas cabinets, in particular to a test system of a gas-insulated switchgear.
Background
35kV SF6 gas-insulated switchgear is a metal-sealed switchgear, all high-voltage components are sealed in a gas chamber welded by stainless steel with good air tightness, and SF6 gas is filled in each separated gas chamber. Because all high-voltage components are completely sealed, the safety is high, and the high-voltage power supply system is widely applied to power supply systems of various industries. The preventive test items of the gas-insulated switchgear mainly include an ac withstand voltage test, a breaker characteristic test, a conductive loop resistance test, a current transformer test, and the like, according to the regulations of DL/T596. At present, a preventive test is to be completed on a gas cabinet, generally, the test is completed before the installation of the gas insulated switchgear, or after SF6 gas in a gas chamber of the gas insulated switchgear is pumped and recovered, the corresponding part is removed for testing, or the test is not performed because of difficult delivery, if the corresponding part of the gas insulated switchgear is removed for testing, the test cost and the test time are increased, or equipment accidents are easily caused because of improper installation, and if the test is not performed, the operation risk of the gas insulated switchgear is increased (the requirement of preventive test rules is not met).
Disclosure of Invention
The utility model mainly aims to provide a test system of a gas-insulated switchgear, which at least solves the problem of low test efficiency of the gas-insulated switchgear in the prior art.
In order to achieve the above object, according to one aspect of the present utility model, there is provided a test system for a gas insulated switchgear comprising: the gas-insulated switch cabinets at least comprise a first gas-insulated switch cabinet and a second gas-insulated switch cabinet, and the first gas-insulated switch cabinet is adjacent to the second gas-insulated switch cabinet; the test instrument is electrically connected with any two adjacent gas-insulated switch cabinets and is used for testing the gas-insulated switch cabinets, and the test instrument is used for detecting the functions of the gas-insulated switch cabinets; the first gas-insulated switch cabinet and the second gas-insulated switch cabinet are electrically connected with the bus, and the first gas-insulated switch cabinet is electrically connected with the bus as a conductor under the condition that the first gas-insulated switch cabinet is used as a lead of the second gas-insulated switch cabinet.
Optionally, each of the gas-insulated switchgear further comprises: the three-position switch comprises a first end and a second end, wherein the first end of the three-position switch is electrically connected with the bus, the three-position switch is provided with a closing state, an isolation state and a grounding state, a circuit where the gas-insulated switch cabinet is located is closed under the condition that the three-position switch is in the closing state, the circuit where the gas-insulated switch cabinet is located is disconnected under the condition that the three-position switch is in the isolation state, and the gas-insulated switch cabinet is grounded under the condition that the three-position switch is in the grounding state.
Optionally, each of the gas-insulated switchgear further comprises: the circuit breaker comprises a first end and a second end, wherein the first end of the circuit breaker is electrically connected with the second end of the three-position switch, the circuit breaker is provided with a closing state and an opening state, the circuit breaker of the first gas-insulated switch cabinet is in the closing state, the three-position switch of the first gas-insulated switch cabinet is in the closing state, the first gas-insulated switch cabinet is electrically connected with the bus as a conductor, the circuit breaker of the second gas-insulated switch cabinet is in the closing state, and the second gas-insulated switch cabinet is electrically connected with the bus as a conductor under the condition that the three-position switch of the second gas-insulated switch cabinet is in the closing state.
Optionally, each of the gas-insulated switchgear further comprises: a plug including a first end and a second end, the first end of the plug being electrically connected to the second end of the circuit breaker; and the second end of the plug is electrically connected with the test instrument through the lead.
Optionally, each of the gas-insulated switchgear further comprises: the current transformer comprises a first end and a second end, wherein the first end of the current transformer is electrically connected with the second end of the circuit breaker, and the second end of the current transformer is electrically connected with the first end of the plug.
Optionally, each of the gas-insulated switchgear further comprises: the capacitive module comprises a first end and a second end, and the first end of the capacitive module is electrically connected with the first end of the plug.
Optionally, each of the gas-insulated switchgear further comprises: and the indicator light loop is connected with the position node of the circuit breaker and used for indicating the state of the circuit breaker.
Optionally, the test instrument comprises at least one of: vacuum circuit breaker tester, current transformer tester, loop resistance measuring instrument and withstand voltage tester.
Optionally, a plurality of the gas-insulated switchgear cabinets are 35kv SF6 gas-insulated switchgear cabinets.
Optionally, a plurality of gas-insulated switchgear cabinets each include a plurality of gas chambers, each of the gas chambers being configured to store SF6 gas.
By applying the technical scheme of the utility model, the gas-insulated switchgear is a metal-sealed switchgear, all high-voltage components are sealed in a gas chamber welded by stainless steel with good gas tightness, SF6 gas is filled in each separated gas chamber, other components except for a cable connection position are not exposed at dew points, and a preventive test can be completed by connecting two ends, so that two gas-insulated switchgears are used as a group, wherein the gas-insulated switchgears are used as conductors (leads) of a second gas-insulated switchgear, and the cable connection positions of the two gas-insulated switchgears are used as the head and tail ends of test connections, so that the corresponding test can be completed by avoiding air extraction and removing the components.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic diagram of a test system of a gas-insulated switchgear according to an embodiment of the utility model;
fig. 2 shows a schematic diagram of the structure of a gas-insulated switchgear.
Wherein the above figures include the following reference numerals:
10. a first gas insulated switchgear; 11. a second gas-insulated switchgear cabinet; 12. a test instrument; 13. a bus; 14. a three-station switch; 15. a circuit breaker; 16. a plug; 17. a lead wire; 18. a current transformer; 19. a capacitance module; 20. an indicator light loop; 21. a third gas-insulated switchgear cabinet; 22. a fourth gas-insulated switchgear cabinet; 23. a voltage transformer module; 24. a capacitor; 25. a voltage indicator light; 26. a first fuse; 27. a second fuse; 28. a varistor.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and in the claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
At present, a preventive test is to be completed on a gas cabinet, and the test is generally completed before the installation of the gas-insulated switchgear, or after SF6 gas in a gas chamber of the gas-insulated switchgear is pumped and recovered, the corresponding part is removed for testing, or the test is not completed because of difficult delivery, so that the electrical equipment can be placed in an irregular running state.
Therefore, in some schemes, the gas-insulated switchgear is difficult to deliver and does not perform preventive tests, in other schemes, the part of the gas-insulated switchgear, which needs to be subjected to air extraction, is removed and then tested, SF6 gas of the gas-insulated switchgear is required to be pumped and recovered after the part is removed, and then the removed part is tested, so that the test cost and the test time are increased, and equipment accidents are easily caused due to improper installation, so that the operation risk is increased.
As described in the background art, the test efficiency of the gas-insulated switchgear in the prior art is low, and in order to solve the problems, the utility model provides a gas-insulated switchgear and a test system of the gas-insulated switchgear.
The utility model provides a test system of a gas-insulated switchgear, as shown in fig. 1, the test system of the gas-insulated switchgear comprises:
a plurality of gas-insulated switchgear cabinets, wherein the plurality of gas-insulated switchgear cabinets at least comprise a first gas-insulated switchgear cabinet 10 and a second gas-insulated switchgear cabinet 11, and the first gas-insulated switchgear cabinet 10 is adjacent to the second gas-insulated switchgear cabinet 11;
a test instrument 12 electrically connected to any two adjacent gas-insulated switchgear cabinets, for testing the gas-insulated switchgear cabinets, the test being for detecting the function of the gas-insulated switchgear cabinets;
specifically, the test is mainly a preventive test in a gas-insulated switchgear, and mainly comprises an alternating-current withstand voltage test, a breaker characteristic test, a conductive loop resistance test, a current transformer test and the like.
Wherein, the first gas-insulated switchgear 10 and the second gas-insulated switchgear 11 are electrically connected to the bus bar 13, and the first gas-insulated switchgear 10 is electrically connected to the bus bar 13 as a conductor when the first gas-insulated switchgear 10 is used as a lead of the second gas-insulated switchgear 11.
In order to further ensure that the gas-insulated switchgear of this scheme can test comparatively high-efficiently, shorten the test degree of difficulty simultaneously, further improve the test efficiency of gas-insulated switchgear, under the circumstances that has two gas-insulated switchgear, first gas-insulated switchgear can be as the lead wire of second gas-insulated switchgear, first gas-insulated switchgear and second gas-insulated switchgear are adjacent, can adopt two adjacent gas-insulated switchgear like this, according to the principle that two adjacent gas-insulated switchgear are the lead wire each other, further accomplish the preventive test of gas-insulated switchgear with high efficiency.
According to the test system of the gas-insulated switchgear, the gas-insulated switchgear is a metal-sealed switchgear, all high-voltage components are sealed in a gas chamber formed by welding stainless steel with good air tightness, SF6 gas is filled in each separated gas chamber, except for a cable connection position, bare dew points are not formed among other components, and a preventive test can be completed by connecting two ends, so that two gas-insulated switchgears are used as a group, the gas-insulated switchgears are used as conductors (leads) of a second gas-insulated switchgear, the cable connection positions of the two gas-insulated switchgears are used as the head and tail ends of the test connection, and the corresponding test can be completed by avoiding air suction and removing the components.
In one embodiment of the present utility model, as shown in fig. 1 and 2, each of the gas-insulated switchgear further includes a three-position switch 14, the three-position switch 14 includes a first end and a second end, the first end of the three-position switch 14 is electrically connected to the bus bar, the three-position switch 14 has a closed state, an isolated state, and a grounded state, when the three-position switch 14 is in the closed state, a circuit in which the gas-insulated switchgear is located is closed, when the three-position switch 14 is in the isolated state, a circuit in which the gas-insulated switchgear is located is opened, and when the three-position switch 14 is in the grounded state, the gas-insulated switchgear is grounded. In the embodiment, as the three-position switch has different working states, on the premise that the gas-insulated switchgear does not need to be pumped and recovered, the related test of the gas-insulated switchgear can be completed according to different switching modes by adopting a loop in the existing gas-insulated switchgear and the different working states of the three-position switch.
In another embodiment of the present utility model, as shown in fig. 1 and 2, each of the gas-insulated switchgear further includes a breaker 15, the breaker 15 includes a first end and a second end, the first end of the breaker 15 is electrically connected to the second end of the three-position switch 14, the breaker 15 has a closed state and an open state, wherein the breaker 15 of the first gas-insulated switchgear 10 is in the closed state, and the three-position switch 14 of the first gas-insulated switchgear 10 is electrically connected as a conductor to the bus bar 13 in the closed state, the breaker 15 of the second gas-insulated switchgear 11 is in the closed state, and the three-position switch 14 of the second gas-insulated switchgear 11 is electrically connected as a conductor to the bus bar 13 in the closed state. In the embodiment, as the circuit breaker has different working states, the related test of the gas-insulated switchgear can be completed according to different switching modes by adopting the circuit in the existing gas-insulated switchgear and the different working states of the circuit breaker on the premise that the gas-insulated switchgear does not need to be pumped and recovered.
In the actual test process, on the basis that the first gas insulated switchgear and the second gas insulated switchgear are mutually lead wires, the bus connected with the first gas insulated switchgear and the second gas insulated switchgear can be intersected in a power failure mode, on the basis that the first gas insulated switchgear is used as the lead wire of the second gas insulated switchgear, the circuit breaker of the first gas insulated switchgear is in a closing state, the three-station switch is in a closing state, and the rest gas insulated switchgears are not connected with the bus.
Specifically, the process of the gas insulated switchgear of the present solution for testing is as follows: the first gas insulated switch cabinets and the second gas insulated switch cabinets which are adjacent to each other in pairs are regarded as a group, the first gas insulated switch cabinets can be used as leads of the second gas insulated switch cabinets, the second gas insulated switch cabinets can also be used as leads of the first gas insulated switch cabinets, the bus is cut out in a power failure mode, primary cables of the first gas insulated switch cabinets and the second gas insulated switch cabinets are removed, special plugs and leads are installed, test equipment is connected, and corresponding tests are completed by changing states of the three-station switch and the circuit breaker.
In this scheme, need not bleed and can accomplish the test, regard two-sided switch cabinet as a whole, the two-sided switch cabinet of test is connected with the generating line, other switch cabinets disconnection, two-sided switch cabinet cable junction department is bare dew point, draw forth through plug and lead wire and connect test equipment, when first gas insulated switchgear is as the lead wire of second gas insulated switchgear, the circuit breaker of first gas insulated switchgear is in the close position state, three station switch is in operating position (closed state), the relevant test of second gas insulated switchgear just can be accomplished through the circuit breaker and the three station switch that close second gas insulated switchgear this moment, otherwise can accomplish the relevant test of first gas insulated switchgear.
Specifically, need not to bleed and need not to demolish gas-insulated switchgear in this scheme and can accomplish preventative test, can protect gas-insulated switchgear's structure, extension gas-insulated switchgear's life. The gas-insulated switchgear in this scheme includes three station switch and circuit breaker, and the maneuverability is strong, can reduce preventive test's degree of difficulty, shortens test time, improves gas-insulated switchgear's test efficiency.
In this scheme, the gas-insulated switchgear need not to take out and only retrieve SF6 gas and also can test, not only can avoid SF6 gas to take out the influence of pollution to equipment in the dress process repeatedly, has also avoided SF6 gas to reveal the influence to the testers simultaneously, ensures experimental security and reliability.
In order to further ensure that the gas-insulated switchgear of the present solution can be directly connected to a test instrument, and further ensure that the present solution can be tested without dismantling the gas-insulated switchgear, as shown in fig. 1 and 2, in still another embodiment of the present utility model, each of the gas-insulated switchgear further includes a plug 16 and a lead 17, the plug 16 includes a first end and a second end, and the first end of the plug 16 is electrically connected to the second end of the circuit breaker; the second end of the plug 16 is electrically connected to the test instrument 12 via the lead 17. In the embodiment, the cable connection part of the gas-insulated switchgear can be connected and fixed in a matching way through the plug and the lead wire, so that the connection in the test process is convenient to test.
In practical applications, the current transformer is one of the components in the gas-insulated switchgear, and it is also necessary to test the performance of the current transformer in the gas-insulated switchgear, and in a specific embodiment of the present utility model, as shown in fig. 1 and 2, each of the gas-insulated switchgear further includes a current transformer 18, where the current transformer 18 includes a first end and a second end, and the first end of the current transformer 18 is electrically connected to the second end of the circuit breaker 15, and the second end of the current transformer 18 is electrically connected to the first end of the plug 16. In this scheme, including current transformer in the gas-insulated switchgear, can use the test instrument to do the test to current transformer in the gas-insulated switchgear to need not demolish the gas-insulated switchgear can do the test to current transformer.
In the circuit of the gas-insulated switchgear, there are in fact many devices, the operation of which will interfere with each other, and the current in the gas-insulated switchgear is also required to be stable, in a further embodiment of the utility model, as shown in fig. 1 and 2, each of the gas-insulated switchgear further comprises a capacitive module 19, the capacitive module 19 comprising a first end and a second end, the first end of the capacitive module 19 being electrically connected to the first end of the plug 16. In this scheme, the electric capacity module is in fact part in the gas-insulated switchgear, can carry out the wave filtering to the electric current in the gas-insulated switchgear through the electric capacity module to guarantee the stability of electric current in the gas-insulated switchgear.
Specifically, the capacitor module may further include a capacitor, and of course, other devices may also be included.
In order to facilitate the operator to check the state of the circuit breaker, in a specific implementation manner of the present utility model, as shown in fig. 1 and 2, each of the gas-insulated switchgear further includes an indicator light loop 20, where the indicator light loop 20 is connected to a position node of the circuit breaker 15, so as to indicate the state of the circuit breaker 15. In this scheme, have the pilot lamp that electrified shows in the pilot lamp return circuit, belong to some in the gas insulated switchgear, can show the position state of circuit breaker, show on the panel of pilot lamp, through switching in the pilot lamp return circuit with circuit breaker position node, can the direct display circuit breaker's state to make things convenient for the staff to look over the state of circuit breaker.
Of course, the pilot lamp can also be connected with three station switch electricity, can show three station switch's position state, shows on the panel of pilot lamp, through switching in the pilot lamp with three station switch, can the direct display three station switch's state to make things convenient for the staff to look over three station switch's state.
Optionally, as shown in fig. 1, in addition to the first gas-insulated switchgear 10 and the second gas-insulated switchgear 11, the test system further includes a plurality of gas-insulated switchgear such as a third gas-insulated switchgear 21, a fourth gas-insulated switchgear 22, a fifth gas-insulated switchgear (not shown in fig. 1 and 2), and of course, the number is not limited to the above, and may be other numbers of gas-insulated switchgears.
In yet another specific embodiment of the present utility model, the test device comprises at least one of the following: vacuum circuit breaker tester, current transformer tester, loop resistance measuring instrument and withstand voltage tester. Of course, the test apparatus is not limited to the above, and other test apparatuses corresponding to the tests may be provided when other preventive tests are required.
The following description is made for different test procedures:
breaker characteristics test: the method comprises the steps that a first gas insulated switchgear and a second gas insulated switchgear are used as a group, three-station switches of the first gas insulated switchgear are in working positions, a circuit breaker is in a closed state, the first gas insulated switchgear is used as a lead of the second gas insulated switchgear, a test instrument is connected to cable outgoing positions of the first gas insulated switchgear and the second gas insulated switchgear, a test plug and a test wire are installed at the cable outgoing positions, and the circuit breaker for opening and closing the second gas insulated switchgear is used for completing a vacuum circuit breaker characteristic test. The test instrument is a high-voltage switch dynamic characteristic tester or a vacuum circuit breaker tester.
Current transformer test: the method comprises the steps that a first gas insulated switchgear and a second gas insulated switchgear are used as a group, three-station switches of the two-sided cabinet are in working positions, a circuit breaker is in a combined state, when a second gas insulated switchgear mutual inductor is tested, a first gas insulated switchgear mutual inductor secondary winding is short-circuited, a test instrument primary wiring is connected to cable outgoing positions of the first gas insulated switchgear and the second gas insulated switchgear, a test plug and a test wire are installed at the cable outgoing positions, and a test instrument secondary wiring is connected to the mutual inductor secondary winding. The test instrument is a current transformer tester.
Conductive loop resistance test: the method comprises the steps that a first gas insulated switchgear and a second gas insulated switchgear are taken as a group, three-station switches of two-sided cabinets are in working positions, a circuit breaker is in a combined state, a test instrument is connected to cable outgoing positions of the first gas insulated switchgear and the second gas insulated switchgear, a test plug and a test wire are installed at the cable outgoing positions, and main loop conductive resistances of the two-sided cabinets are tested together. The test instrument is a circuit breaker conductive loop resistance tester, and the rated current of the test line is not less than 100A (of course, the rated current is not limited to 100A, and can be any other feasible rated current, and the rated currents corresponding to different test instruments can be different, for example, 200A and 300A).
First withstand voltage test: the whole section of bus is taken as a group, all three-station switches of the switch cabinet on the bus are in working positions, the circuit breaker is in a closing state, a test instrument is connected to a cable outlet, a test plug and a test wire are arranged at the cable outlet, and the voltage withstand test of the circuit breaker and the three-station switches can be realized; the three stations are in an isolation state, the circuit breaker is in a split state (a disconnection state), and the wiring is unchanged, so that a fracture withstand voltage test under the circuit breaker can be completed; the three-station is in an isolation state, the circuit breaker is in a combination state, and the wiring is unchanged, so that the fracture withstand voltage test under the three-station switch can be realized.
Second withstand voltage test: taking the whole section of bus as a group, dismantling the bus voltage transformer, wherein all three-station switches of a switch cabinet on the bus are in a working state, the circuit breaker is in a closing state, a test instrument is connected to an outgoing line of the bus voltage transformer, and a test plug and a test wire are arranged at the outgoing line, so that a withstand voltage test of the circuit breaker and the three-station switches can be realized; the three stations are in a working state, the circuit breaker is in a separated state (a disconnected state), and the break withstand voltage test on the circuit breaker can be completed without changing the wiring; the three-station switch is in an isolation position, the circuit breaker is in a separated state (a disconnection state), and the wiring is unchanged, so that the break withstand voltage test on the three-station switch can be realized. The test instrument is a series resonance voltage-withstanding instrument, the rated voltage of the wiring is not less than 120kV (of course, the rated voltage is not limited to 120kV, and can be any other feasible rated voltage, and the rated voltages corresponding to different test instruments can be different, for example 220kV and 150 kV).
In an alternative embodiment of the utility model, a plurality of the gas-insulated switchgear cabinets are 35kv SF6 gas-insulated switchgear cabinets. The gas-insulated switchgear of the utility model is a 35kV SF6 gas-insulated switchgear, and the test system can be used for preventive tests on the 35kV SF6 gas-insulated switchgear.
In a specific application, the plurality of gas-insulated switchgear cabinets of the present utility model comprise a plurality of gas chambers, each of which is used for storing SF6 gas. In this scheme, because the test of gas insulated switchgear can be accomplished in the test system need not bleed, SF6 gas in the gas insulated switchgear still can remain in the gas insulated switchgear when testing.
Specifically, as shown in fig. 1, the test system further includes a voltage transformer module 23, and when a withstand voltage test is performed, the voltage transformer module 23 may be disconnected, and the voltage transformer module 23 includes a capacitor 24, a plurality of voltage indicator lamps 25, a first fuse 26, a second fuse 27, and a varistor 28.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:
according to the test system of the gas-insulated switchgear, the gas-insulated switchgear is a metal-sealed switchgear, all high-voltage components are sealed in a gas chamber welded by stainless steel with good air tightness, SF6 gas is filled in each separated gas chamber, except for a cable connection position, bare dew points are not arranged among other components, and a preventive test can be completed by connecting two ends, so that two gas-insulated switchgears are used as a group, wherein the gas-insulated switchgears are used as conductors (leads) of a second gas-insulated switchgear, the cable connection positions of the two gas-insulated switchgears are used as the head and tail ends of the test connection, and the corresponding test can be completed by avoiding air suction and removing the components.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A test system for a gas insulated switchgear comprising:
the gas-insulated switch cabinets at least comprise a first gas-insulated switch cabinet and a second gas-insulated switch cabinet, and the first gas-insulated switch cabinet is adjacent to the second gas-insulated switch cabinet;
the test instrument is electrically connected with any two adjacent gas-insulated switch cabinets and is used for testing the gas-insulated switch cabinets, and the test instrument is used for detecting the functions of the gas-insulated switch cabinets;
the first gas-insulated switch cabinet and the second gas-insulated switch cabinet are electrically connected with the bus, and the first gas-insulated switch cabinet is electrically connected with the bus as a conductor under the condition that the first gas-insulated switch cabinet is used as a lead of the second gas-insulated switch cabinet.
2. The test system of gas insulated switchgear according to claim 1, wherein each of the gas insulated switchgear further comprises:
the three-position switch comprises a first end and a second end, wherein the first end of the three-position switch is electrically connected with the bus, the three-position switch is provided with a closing state, an isolation state and a grounding state, a circuit where the gas-insulated switch cabinet is located is closed under the condition that the three-position switch is in the closing state, the circuit where the gas-insulated switch cabinet is located is disconnected under the condition that the three-position switch is in the isolation state, and the gas-insulated switch cabinet is grounded under the condition that the three-position switch is in the grounding state.
3. The test system of gas insulated switchgear according to claim 2, wherein each of the gas insulated switchgear further comprises:
the circuit breaker comprises a first end and a second end, wherein the first end of the circuit breaker is electrically connected with the second end of the three-position switch, the circuit breaker is provided with a closing state and an opening state, the circuit breaker of the first gas-insulated switch cabinet is in the closing state, the three-position switch of the first gas-insulated switch cabinet is in the closing state, the first gas-insulated switch cabinet is electrically connected with the bus as a conductor, the circuit breaker of the second gas-insulated switch cabinet is in the closing state, and the second gas-insulated switch cabinet is electrically connected with the bus as a conductor under the condition that the three-position switch of the second gas-insulated switch cabinet is in the closing state.
4. A test system for gas insulated switchgear as claimed in claim 3, wherein each of the gas insulated switchgear further comprises:
a plug including a first end and a second end, the first end of the plug being electrically connected to the second end of the circuit breaker;
and the second end of the plug is electrically connected with the test instrument through the lead.
5. The test system of gas insulated switchgear according to claim 4, wherein each of the gas insulated switchgear further comprises:
the current transformer comprises a first end and a second end, wherein the first end of the current transformer is electrically connected with the second end of the circuit breaker, and the second end of the current transformer is electrically connected with the first end of the plug.
6. The test system of gas insulated switchgear according to claim 4, wherein each of the gas insulated switchgear further comprises:
the capacitive module comprises a first end and a second end, and the first end of the capacitive module is electrically connected with the first end of the plug.
7. The test system of gas insulated switchgear according to claim 6, wherein each of the gas insulated switchgear further comprises:
and the indicator light loop is connected with the position node of the circuit breaker and used for indicating the state of the circuit breaker.
8. The test system of a gas insulated switchgear as claimed in claim 1, wherein the test apparatus comprises at least one of: vacuum circuit breaker tester, current transformer tester, loop resistance measuring instrument and withstand voltage tester.
9. The test system of gas insulated switchgear according to claim 1, wherein a plurality of said gas insulated switchgears are 35kv SF6 gas insulated switchgears.
10. The system of claim 9, wherein a plurality of gas cells are included in each of the plurality of gas cells, each of the plurality of gas cells being configured to store SF6 gas.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147708A (en) * | 2023-03-14 | 2023-05-23 | 国家能源集团宁夏煤业有限责任公司 | Test system for gas insulated switchgear |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147708A (en) * | 2023-03-14 | 2023-05-23 | 国家能源集团宁夏煤业有限责任公司 | Test system for gas insulated switchgear |
| CN116147708B (en) * | 2023-03-14 | 2025-06-20 | 国家能源集团宁夏煤业有限责任公司 | Test system for gas-insulated switchgear |
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