CN215340152U - Withstand voltage test device that GIS transformer substation cable compartment was arranged outdoors - Google Patents
Withstand voltage test device that GIS transformer substation cable compartment was arranged outdoors Download PDFInfo
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- CN215340152U CN215340152U CN202120688538.1U CN202120688538U CN215340152U CN 215340152 U CN215340152 U CN 215340152U CN 202120688538 U CN202120688538 U CN 202120688538U CN 215340152 U CN215340152 U CN 215340152U
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Abstract
The utility model relates to a withstand voltage test device for outdoor arrangement of a GIS (gas insulated switchgear) substation cable cabin, which comprises an internal switch and a bus structure positioned in a GIS room and an external outgoing line structure positioned outside the GIS room, wherein the external outgoing line structure comprises an outgoing cable cabin, a cable trench and a withstand voltage test sleeve, the withstand voltage test sleeve and the outgoing cable cabin are connected with the internal outgoing line structure of the GIS room through a branch bus, the lower end of the outgoing cable cabin is connected with one end of the cable, the other end of the cable is connected into the cable trench positioned below the outgoing cable cabin, and the withstand voltage test sleeve is installed at the top of the branch bus. Compared with a single-layer indoor pressure resistance test scheme, the layout structure can reduce the construction cost of the building, shorten the construction period and ensure the integral consistency of the building.
Description
Technical Field
The utility model relates to the technical field of transformer substation power transmission, in particular to a withstand voltage test device for outdoor arrangement of a GIS transformer substation cable compartment.
Background
Gas Insulated metal enclosed Switchgear (GIS) adopts SF6 Gas as an insulating medium, and high-voltage electric appliances such as a circuit breaker, a bus, an isolating switch, a voltage transformer, a current transformer, a lightning arrester, a sleeve and the like are sealed in a grounded metal cylinder, so that the GIS has the characteristics of high reliability, less maintenance workload and long overhaul period.
GIS cable alternating current withstand voltage test is through applying the high voltage of certain time to GIS power cable, appraises GIS power cable's dielectric strength, and then can in time discover cable and annex in making, transportation, installation and the quality problems of operation in-process, avoid breaking down after the delivery, be the test of guaranteeing reliable delivery and safe operation of alternating current cable, including retrieving cable under-deck SF6 gas, nitrogen washes, open the cable cabin, installation test sleeve pipe, connect inside pressure line, close the cable cabin, evacuation, gas injection, a plurality of steps such as stewing.
In a single-floor indoor GIS substation, the building floor height needs to be increased in order to perform a withstand voltage test. The safety distance of the pressure-resistant test sleeve is usually 1.8m, and when the pressure-resistant test of the bus cable compartment is carried out, the maximum indoor clearance height is required to be 8.5m by adding the height of the sleeve. Increasing the height of the GIS equipment room not only increases the construction cost, but also causes the height of the single-layer parallel 10kV room and the GIS room to be inconsistent, and influences the overall urban planning.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a withstand voltage test device for outdoor arrangement of a cable compartment of a GIS substation, so as to solve the problem that the overall urban planning is affected by increasing the height of a GIS equipment room, which increases the construction cost, and also by the height of a single-layer parallel 10kV room and a GIS room, which are not coordinated.
The technical scheme of the utility model provides a withstand voltage test device for outdoor arrangement of a GIS substation cable cabin, which comprises an internal switch and a bus structure positioned in a GIS room and an external outgoing line structure positioned outside the GIS room, wherein the external outgoing line structure comprises an outgoing cable cabin, a cable trench and a withstand voltage test sleeve, the withstand voltage test sleeve and the outgoing cable cabin are connected with the internal switch and the bus structure of the GIS room through branch buses, the withstand voltage test sleeve is detachably connected with the top of a cable terminal positioned in the outgoing cable cabin through a pressurizing lead, the bottom of the cable terminal is connected with one end of the cable, and the other end of the cable is connected into the cable trench positioned below the outgoing cable cabin.
Further, the pressure-resistant test sleeve is installed at the top of the outgoing cable cabin.
Furthermore, the pressure-resistant test sleeve is installed on the branch bus and is positioned on one side of the outgoing cable compartment.
Furthermore, the external outlet structure further comprises a PT, and the PT is installed on the branch bus and is connected with the internal switch and the bus structure in the GIS room through the branch bus.
Furthermore, the external outlet structure further comprises a lightning arrester, wherein the lightning arrester is installed on the branch bus and is connected with the internal switch and the bus structure in the GIS room through the branch bus.
Further, the lightning arrester is installed on the top of the branch bus and sleeved outside the voltage withstand test sleeve.
Further, the GIS indoor switch and the bus structure comprise a bent pipe and an expansion joint connected with a branch bus, a disconnecting switch, a current transformer and a circuit breaker, wherein the bent pipe and the expansion joint, the outgoing line disconnecting switch, the current transformer and the circuit breaker are sequentially connected.
Furthermore, the GIS indoor switch and bus structure further comprises a bus isolating switch and a main bus, and the other end of the breaker is sequentially connected with the bus isolating switch and the main bus.
Furthermore, one side of the circuit breaker is also provided with a control cubicle.
Furthermore, the cable terminal comprises a three-phase cable terminal consisting of an A phase, a B phase and a C phase, the number of the pressure-resistant test sleeves is three, and the three pressure-resistant test sleeves are respectively connected with the tops of the A phase, the B phase and the C phase of the cable terminal in a one-to-one correspondence mode through a pressurizing lead.
Further, the branch bus bar is a GIL branch bus bar.
Compared with the prior art, the utility model can achieve the following technical effects:
1. according to the outdoor arrangement structure of the GIS substation cable compartment, provided by the utility model, the cable compartment, the cable trench, the pressure test sleeve and other mechanical motion parts and electronic components are arranged outdoors, so that the earth excavation amount is reduced because the cable compartment is arranged outdoors. In addition, when the outdoor high-voltage cable is laid by adopting the cable trench, the cable planning and the mechanical construction are facilitated, the cross interference with other indoor facilities is avoided, and the outdoor cable facility interface is simplified. Because the high-voltage cable is arranged outdoors, the indoor part is not influenced when the cable fails, the accident range is reduced, and the operation safety of the high-voltage cable is improved.
2. According to the utility model, the outgoing cable cabin is arranged outside the GIS room enclosing wall, a GIS voltage withstand test aiming at the outgoing cable cabin can be carried out outdoors, and the voltage withstand test is carried out on the single interval through the GIL branch bus wall, so that the same test as the indoor voltage withstand test is completed. As the GIS indoor equipment arrangement does not need to consider the safety distance of the withstand voltage test, the height of the GIS room is still 5.5m, and the height is consistent with the height of a 10kV room. Compared with a single-layer indoor pressure resistance test scheme, the scheme can reduce the construction cost of the building, shorten the construction period and ensure the integral consistency of the building.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a withstand voltage test device arranged outdoors in a GIS substation cable compartment according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the withstand voltage test device arranged outdoors in the GIS substation cable compartment provided by the utility model;
101-GIS room, 1-internal switch and bus structure, 2-external outlet structure, 21-outlet cable cabin, 22-cable trench, 23-withstand voltage test casing, 24-arrester, 25-PT, 26-cable, 3-branch bus, 11-elbow and expansion joint, 12-outlet isolating switch, 17-current transformer, 13-breaker, 14-control cubicle, 15-bus isolating switch and 16-main bus.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the utility model and together with the description, serve to explain the principles of the utility model and not to limit the scope of the utility model.
As shown in fig. 1, an embodiment of the present invention provides a withstand voltage test device for outdoor arrangement of a GIS substation cable compartment, including an internal switch and bus structure 1 located in a GIS room 101, and an external outgoing line structure 2 located outside the GIS room 101, where the external outgoing line structure 2 includes an outgoing cable compartment 21, a cable 26, a cable trench 22, and a withstand voltage test bushing 23, where the withstand voltage test bushing 23 and the outgoing cable compartment 21 are connected to the internal switch and bus structure 1 in the GIS room 101 through a branch bus 3, the withstand voltage test bushing 23 is detachably connected to a top of a cable terminal located in the outgoing cable compartment 21 through a pressurization lead, a bottom of the cable terminal is connected to one end of the cable 26, and another end of the cable 26 is connected to the cable trench 22 located below the outgoing cable compartment 21.
According to the utility model, the outgoing cable cabin 21 is arranged outdoors, and no cable interlayer or cable interlayer is required to be arranged indoors, so that the construction of auxiliary facilities and underground related facilities is reduced, and particularly the earth excavation amount is reduced. In addition, when the outdoor high-voltage cable is laid by adopting a cable tunnel or a cable trench, the cable is convenient to plan and mechanically construct, the cross interference with other indoor facilities is avoided, and the outdoor cable facility interface is simplified. Because the high-voltage cable is arranged outdoors, the indoor part is not influenced when the cable fails, the accident range is reduced, and the operation safety of the high-voltage cable is improved.
A pressurizing lead (not shown in the figure) is arranged in the pressure test sleeve 23, and the pressurizing lead is connected with a cable terminal in the outgoing cable compartment 21 and is disconnected with the electric connection between the outgoing cable compartment and a switch and a bus in a GIS room to perform a pressurizing test, so that the insulation strength of the cable is determined, and the reliable operation and the safe operation of the alternating current cable are ensured.
According to the utility model, the outgoing cable compartment 21 and the pressure test sleeve 23 are both arranged outside the GIS room 101, the GIS pressure test can be carried out outdoors, and the pressure test can be carried out at an individual interval by the wall penetration of the branch bus, so that the same test as the indoor pressure test is completed. Since the equipment layout in the GIS room 101 does not need to consider the safety distance of the withstand voltage test, the height of the GIS room is still 5.5m, which is consistent with the height of the 10kV room, and the height of the withstand voltage test bushing 23 is 1.8 m. Compared with a single-layer indoor pressure resistance test scheme, the scheme can reduce the construction cost of the building, shorten the construction period and ensure the integral consistency of the building.
Preferably, the branch bus is a gas insulated transmission line (GIL) branch bus, the GIL branch bus is an electric energy transmission device which adopts a metal shell to seal a conducting rod, adopts compressed gas (such as SF6, SF6/N2 mixed gas, environment-friendly gas and the like) to insulate, and has the advantages of large transmission capacity, low unit loss, small environmental influence, high operation reliability, land occupation saving and the like, and the shell and the conducting rod are coaxially arranged.
More specifically, the pressure-resistant test sleeve 23 may be fixedly installed on one side of the outgoing cable compartment 21 or on the top of the outgoing cable compartment 21. However, in order to reduce the length of the branch bus bar 3 and thus reduce the cost, and also to facilitate the pressure test of the outgoing cable compartment 21, it is preferable that the pressure test bushing 23 is fixedly mounted on the outgoing cable compartment 21.
In order to improve the test efficiency and reduce the times of dismounting and mounting in the cable voltage-withstand test process, the cable terminal comprises a three-phase cable terminal including an A phase, a B phase and a C phase, the voltage-withstand test sleeve 23 comprises three voltage-withstand test sleeves 23 which are detachably connected with the tops of the A phase, the B phase and the C phase through a pressurizing lead respectively in a one-to-one correspondence manner. Through setting up withstand voltage test sleeve pipe 23 to include three, and once be connected with A looks, B looks and C looks cable terminal respectively, need not open cable hold 21 during the commutation test just can tear open the wiring operation on the three-phase sleeve pipe of drawing forth, reduced the number of times of opening the cabin, shortened greatly and opened the consuming time of cabin tearing open the wiring.
As shown in fig. 2, further, the outgoing line voltage transformer (PT)25, the lightning arrester 24 and the outgoing line cable compartment 21 can be arranged outdoors for easy disassembly and testing. More specifically, the PT25 is mounted on the branch busbar 3 and is connected to the internal switch and busbar arrangement 1 via the branch busbar 3. The surge arrester 24 is mounted on the branch busbar 3 and is connected to the switch and busbar arrangement 1 via the branch busbar 3.
The GIS indoor switch and bus structure 1 comprises a bent pipe and a telescopic joint 11 connected with a branch bus 3, an outgoing line isolating switch 12, a current transformer 17 and a circuit breaker 13, wherein the bent pipe and the telescopic joint 11, the outgoing line isolating switch 12, the current transformer 17 and the circuit breaker 13 are sequentially connected.
The switch and bus structure 1 in the GIS room 101 further comprises a bus isolating switch 15 and a main bus 16, and the other end of the breaker 13 is sequentially connected with the bus isolating switch 15 and the main bus 16. And a control cubicle is also arranged on one side of the breaker 13.
In the internal switch and bus structure 1 of the GIS room 101, the circuit breaker 13, the outgoing line isolating switch 12 and the bus isolating switch 15 are all provided with external movable parts such as an operating mechanism box, a connecting rod and the like, and are easily corroded by the influence of outdoor environment to cause movement failure; due to the fact that the air chambers are connected and separated more, the main bus is longer, the air inflation amount is large and the like, if the external arrangement is easily affected by the outdoor environment, sealing aging is accelerated, and air leakage is caused; the operation part and the online detection probes are more, the control cubicle is frequently operated, and the outdoor arrangement environment has a larger influence on the operation; and therefore should be disposed inside the GIS equipment room.
By arranging the outgoing cable compartment 21, the cable 26, the cable trench 22 and the voltage withstand test sleeve 23 outside the GIS room 101, the outgoing cable compartment 21 is outside the wall of the GIS room 101, the GIS voltage withstand test can be carried out outdoors, and the height of the GIS room 101 is still 5.5m and is consistent with the height of the 10kV room because the equipment arrangement in the GIS room 101 does not need to consider the safety distance of the voltage withstand test. Compared with a single-layer indoor pressure resistance test scheme, the scheme can reduce the construction cost of the building, shorten the construction period and ensure the integral consistency of the building.
It should be noted that, because PT25, arrester 24, outgoing line cable compartment 21 arrange in the open air, the probability that equipment components will break down due to the influence of weather environment increases, in addition, because PT25, arrester 24 equipment arrange in the open air directly, the abrupt appearance is not harmonious with surrounding residential area, factory building, cause certain influence to the municipal planning of whole, central area that the requirement for environment beauty is higher needs to adopt entity enclosure and rail etc. to shelter from. Therefore, the GIS substation cable compartment outdoor arrangement structure provided by the utility model is mainly suitable for suburban areas with less severe environmental conditions and relatively low urban attractiveness.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a withstand voltage test device that GIS cable compartment of transformer substation was arranged outdoors, its characterized in that, including being located the indoor internal switch of GIS and bus structure, and being located the outdoor outside outlet structure of GIS, outside outlet structure is including being qualified for the next round of competitions cable compartment, cable conductor, cable pit and withstand voltage test sleeve pipe, withstand voltage test sleeve pipe and the cable compartment of being qualified for the next round of competitions are connected with the internal switch and the bus structure of GIS room through branch generating line, withstand voltage test sleeve pipe through the pressurization lead wire with be located the detachable connection in top of the cable terminal of the cable compartment of being qualified for the next round of competitions, the bottom of cable terminal with the one end of cable conductor is connected, the other end of cable conductor is connected to and is located in the cable pit of the cable compartment below of being qualified for the next round of competitions.
2. The outdoor arranged voltage withstand test device of the GIS substation cable compartment of claim 1, wherein the voltage withstand test bushing is installed on the top of the outgoing cable compartment.
3. The outdoor-arranged voltage withstand test device for the GIS substation cable compartment according to claim 1, wherein the voltage withstand test sleeve is installed on the branch bus and located on one side of the outgoing cable compartment.
4. The outdoor withstand voltage test device of GIS transformer substation cable compartment of claim 1, characterized in that, the outside outlet structure still includes PT, PT install on branch's generating line, and through branch's generating line with indoor internal switch of GIS and the busbar structure connection.
5. The outdoor withstand voltage test device of GIS transformer substation cable compartment of claim 1, characterized in that, the outside outlet structure still includes the arrester, the arrester is installed on the branch bus-bar, and through branch bus-bar with indoor internal switch of GIS and busbar configuration connection.
6. The outdoor withstand voltage test device who arranges of GIS transformer substation cable compartment of claim 1, characterized in that, the indoor switch of GIS and bus structure include return bend and telescopic joint, the isolator of being qualified for the next round of competitions, current transformer and the circuit breaker of being connected with branch bus, return bend and telescopic joint, the isolator of being qualified for the next round of competitions, current transformer and circuit breaker connect gradually.
7. The outdoor withstand voltage test device of GIS transformer substation cable compartment of claim 6, characterized in that, the inside switch of GIS room and bus structure still include busbar isolator and main bus, busbar isolator and main bus are being connected in proper order to the other end of circuit breaker.
8. The outdoor withstand voltage test device of arranging of GIS transformer substation cable compartment of claim 6, characterized in that, one side of circuit breaker still is provided with the collection accuse cabinet.
9. The GIS substation cable compartment outdoor layout withstand voltage test device of claim 1, characterized in that, the cable terminal includes three phase cable terminals including phase A, phase B and phase C, withstand voltage test sleeve pipe includes three, three withstand voltage test sleeve pipe respectively through a pressurization lead with the top one-to-one detachable connection of phase A, phase B and phase C cable terminal.
10. The outdoor arranged voltage withstand test device of the GIS substation cable compartment of claim 1, wherein the branch bus is a GIL branch bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120688538.1U CN215340152U (en) | 2021-04-02 | 2021-04-02 | Withstand voltage test device that GIS transformer substation cable compartment was arranged outdoors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120688538.1U CN215340152U (en) | 2021-04-02 | 2021-04-02 | Withstand voltage test device that GIS transformer substation cable compartment was arranged outdoors |
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| CN215340152U true CN215340152U (en) | 2021-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400514A (en) * | 2021-12-31 | 2022-04-26 | 广东顺德电力设计院有限公司 | GIS power distribution unit's outlet structure and GIS transformer substation |
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2021
- 2021-04-02 CN CN202120688538.1U patent/CN215340152U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400514A (en) * | 2021-12-31 | 2022-04-26 | 广东顺德电力设计院有限公司 | GIS power distribution unit's outlet structure and GIS transformer substation |
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