CN217427474U - Gas insulation switch cabinet - Google Patents
Gas insulation switch cabinet Download PDFInfo
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- CN217427474U CN217427474U CN202122479713.9U CN202122479713U CN217427474U CN 217427474 U CN217427474 U CN 217427474U CN 202122479713 U CN202122479713 U CN 202122479713U CN 217427474 U CN217427474 U CN 217427474U
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- insulated switchgear
- cabinet
- bus
- position switch
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Abstract
The utility model provides a gas insulated switchgear, which comprises a switchgear body, wherein the switchgear body comprises a first side cabinet and a second side cabinet along the width direction of the switchgear body; the first side cabinet comprises a relay chamber, an operating mechanism and a secondary cable chamber which are arranged from top to bottom along the height direction; the second side cabinet comprises a pressure relief channel, an insulating gas box, an overhaul area and secondary cable channels positioned on two sides of the overhaul area, wherein the pressure relief channel, the insulating gas box and the overhaul area are arranged from top to bottom along the height direction; a bus bar, a bus, a vacuum circuit breaker, a first three-position switch and a second three-position switch which are positioned on two sides of the vacuum circuit breaker are electrically connected with each other and arranged in the insulating gas box; the pressure relief channel is located above the bus and parallel to the bus. The technical scheme has simple and compact structure, is favorable for space optimization and is convenient to overhaul.
Description
Technical Field
The utility model relates to a gas insulated switchgear.
Background
The larger the single-machine capacity of the fan is, the more obvious the economical efficiency of adopting a 66kV voltage grade for a current collection circuit is. The offshore booster station is a heart of alternating-current offshore wind power, wherein a 66kV gas insulated switchgear is one of key electrical equipment of the offshore booster station, and no mature 66kV gas insulated switchgear for the offshore booster station exists at present. The 35kV gas insulated switch cabinet used in the existing offshore booster station has the following defects: only the incoming line cabinet under the cable is applicable to the condition of large incoming current; the incoming line side of the circuit breaker is not provided with a three-station switch, so that the incoming line terminal and the incoming line are not easy to overhaul; an independent bus overhaul grounding switch is not arranged, so that the bus has an electrified risk during overhaul; a cabinet rear maintenance space needs to be reserved, so that the area of a switch cabinet chamber is large; it is impossible to perform an integrated withstand voltage test on the cable, the cable terminal and the cable socket as a whole.
The switch cabinet is used as important equipment of the offshore booster station, and can be safely overhauled and maintained without electricity, so that the switch cabinet is of great importance. In addition, with the price flattening of offshore wind power, the area of the compression switch cabinet chamber can effectively reduce the manufacturing cost of the offshore booster station, and the offshore wind power generation system has high economic benefit.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to overcome the defects existing in the prior art, and provide a gas insulated switchgear which has simple and compact structure, is favorable for space optimization and convenient maintenance.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a gas insulated switchgear comprises a switchgear body, wherein the switchgear body comprises a first side cabinet and a second side cabinet along the width direction of the switchgear body; the first side cabinet comprises a relay chamber, an operating mechanism and a secondary cable chamber which are arranged from top to bottom along the height direction; the second side cabinet comprises a pressure relief channel, an insulating gas box, an overhaul area and secondary cable channels positioned on two sides of the overhaul area, wherein the pressure relief channel, the insulating gas box and the overhaul area are arranged from top to bottom along the height direction; a bus bar, a bus, a vacuum circuit breaker, a first three-position switch and a second three-position switch which are electrically connected with each other are arranged in the insulating gas box; the pressure relief channel is located above the bus and parallel to the bus.
Further, still be equipped with current transformer in the insulating gas tank, busbar's top sets gradually first three station switches current transformer, vacuum circuit breaker the three station switches of second, the three station switches of second are connected to the side at last the generating line.
Furthermore, the bottom of the busbar is connected with a plug-in arrester and a plug-in cable terminal spliced by three phases or a plug-in cable terminal spliced by four phases.
Furthermore, the gas insulation switch cabinet is a cable lower incoming line gas insulation switch cabinet.
Furthermore, the second side cabinet is also provided with an incoming hard bare conductor; the hard naked conductor of inlet wire passes through the sleeve pipe access of second side cabinet top the lower guide body in the insulating gas tank and finally access busbar converges.
Furthermore, the gas insulation switch cabinet is a hard bare conductor upper wire inlet gas insulation switch cabinet.
Further, the busbar is connected with a plug-in arrester and a plug-in fuse connected with a bus voltage transformer; and a bus maintenance grounding switch is also arranged on the bus.
Further, the gas insulation switch cabinet is a mother gas insulation switch cabinet.
Further, the bus bar is arranged on one side in the cabinet along the height direction of the second side cabinet; the first three-position switch is connected to the bus through the bus bar.
Further, the gas-insulated switchgear is a sectionalized isolated gas-insulated switchgear.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) elements such as a bus, a circuit breaker, a current transformer and a three-position switch are completely arranged in the insulating gas box, so that the size of the cabinet body is effectively reduced;
(2) the gas insulation switch cabinet for the upper wiring of the hard bare conductor for the offshore booster station can break through the limitation of the current-carrying capacity of the cable, is used for the condition of larger current of the incoming wire, and does not need to consider the requirement of the turning radius of the cable, thereby reducing the requirement on space;
(3) three-station switches are arranged on the wire inlet sides of the vacuum circuit breakers of the cable lower inlet wire gas insulation switch cabinet and the hard bare conductor upper inlet wire gas insulation switch cabinet, so that the operation steps of wire inlet terminal and wire inlet grounding maintenance can be simplified;
(4) the bus-arranged gas insulation switch cabinet is provided with an independent bus maintenance grounding switch, so that grounding is facilitated during bus maintenance;
(5) the gas insulation switch cabinet with the lower incoming cable, the bus gas insulation switch cabinet and the sectionalized isolation gas insulation switch cabinet are maintained and connected in front of the cabinet and can be installed by the wall, so that the area of a switch cabinet chamber can be reduced to the maximum extent;
(6) the grounding end of a three-station switch at the wire inlet side of a vacuum circuit breaker of the cable lower inlet wire gas-insulated switch cabinet can be used as an access point of a withstand voltage test of an inlet wire cable, so that the integrated withstand voltage test of the cable, a cable terminal and a cable socket as a whole is realized.
Drawings
Fig. 1 is a view of the cable lower inlet wire gas insulated switchgear of the present invention, wherein, (a) is a left side view, and (b) is a front view.
Fig. 2 is the utility model discloses inlet wire gas insulated switchgear's wiring diagram under the cable.
Fig. 3 is a view of the hard bare conductor upper inlet wire gas insulated switchgear of the present invention, wherein, (a) is a left side view, and (b) is a front view.
Fig. 4 is a wiring diagram of the hard bare conductor upper inlet wire gas insulation switch cabinet of the present invention.
Fig. 5 is a view of the parent gas insulated switchgear of the present invention, wherein (a) is a left side view and (b) is a front view.
Fig. 6 is a wiring diagram of the female gas insulated switchgear of the present invention.
Fig. 7 is a view of the sectionalized gas insulated switchgear of the present invention, wherein, (a) is a left side view, and (b) is a right side view.
Fig. 8 is a front view of the sectionalized gas insulated switchgear of the present invention.
Fig. 9 is a wiring diagram of the sectionalized isolated gas insulated switchgear of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 and fig. 2 show a first embodiment of the gas insulated switchgear of the present invention. The gas insulated switchgear of the present embodiment includes a cabinet body including a first side cabinet 100 and a second side cabinet 200 along a width direction thereof. First side cabinet 100 includes relay room 9, operating device 8 and secondary cable chamber 11 from last to setting up down along the direction of height, and is concrete, and relay room 9 is located the top of first side cabinet 100, and operating device 8 sets up at first side cabinet 100's first half and main part, and secondary cable chamber 11 is located the lower part of first side cabinet 100. The second side cabinet 200 includes a pressure relief passage 6, an insulating gas box, an overhaul region 10 and secondary cable passages 16 located at both sides of the overhaul region 10, which are arranged from top to bottom in the height direction, and the secondary cables are led up to the secondary cable chamber 11 through the secondary cable passages 16 at both sides. Specifically, the maintenance area 10 is located at a position where the lower portion of the second side cabinet 200 corresponds to the secondary cable chamber 11, so that the cabinet body can be installed against a wall without reserving a maintenance space.
The insulating gas box is internally provided with a busbar 7, a current transformer 4, a bus 1, a vacuum circuit breaker 3, a first three-position switch 2-1 and a second three-position switch 2-2 which are electrically connected with each other, and the first three-position switch 2-1 and the second three-position switch 2-2 are positioned on two sides of the vacuum circuit breaker 3. Specifically, a first three-position switch 2-1, a current transformer 4, a vacuum circuit breaker 3 and a second three-position switch 2-2 are sequentially arranged above the busbar 7, and the second three-position switch 2-2 is finally connected to the bus 1 on the side edge. Therefore, the grounding end of the three-station switch on the wire inlet side of the vacuum circuit breaker 3 can be used as an access point for the voltage withstand test of the wire inlet cable 13, and the integrated voltage withstand test of the cable, the cable terminal and the cable socket as a whole is realized through the grounding end of the first three-station switch 2-1. And because vacuum circuit breaker 3 both sides all set up three station switches, consequently when inlet wire side or circuit breaker 3 need ground connection to overhaul, break off circuit breaker 3 earlier and close earthing switch again, do not need five to prevent the unblock, simplify the operation flow and avoid live-line operation, accord with the operation personnel operation custom.
The positions of the vacuum circuit breaker 3, the first three-position switch 2-1 and the second three-position switch 2-2 correspond to the operating mechanism 8. The internal combustion arc pressure relief channel 6 is arranged above the bus 1, is arranged in parallel with the bus 1 and is made of an explosion-proof material. The pressure relief mode is safe and reliable, and can realize the safety protection of operation and maintenance personnel.
The bottom of the busbar 7 can be plugged with a one-phase four-spliced plug-in cable terminal or can be plugged with a one-phase three-spliced plug-in cable terminal 15 and a plug-in lightning arrester 5 at most. Each cable terminal 15 socket can be plugged with a medium-voltage cable of 800mm2 to the maximum extent, so that the capacity requirement of wind power plant access is met to the maximum extent. Specifically, the incoming cables 13 in fig. 1 (a) are three cables of a certain phase a/B/C, and the incoming cables 13 in fig. 1 (B) represent A, B, C three-phase cables, and A, B, C three-phase cables pass through the zero-sequence current transformer 14. The plug-in arrester 5 is arranged directly behind the plug-in cable terminal 15. In particular, the current transformer 4 is disposed between the cable terminal 15 and the circuit breaker 3, and the protection range covers the cable terminal 15 with a high failure rate.
The insulating gas in the insulating gas box can be SF6, dry air and other insulating environment-friendly gases.
This embodiment one can regard as inlet wire gas insulated switchgear under the cable.
Fig. 3 and 4 are attached to a second embodiment of the gas insulated switchgear of the present invention. The arrangement of the electrical components of the second embodiment is substantially the same as that of the first embodiment, except that: the second side cabinet 200 of the second embodiment is further provided with an incoming hard bare conductor 12. The hard bare conductor 12 of incoming line inserts the interior lower guide body 17 of cabinet and finally inserts busbar 7 through the sleeve pipe 21 at the top of second side cabinet 200. Specifically, the busbar 7, the first three-position switch 2-1, the current transformer 4, the vacuum circuit breaker 3, the second three-position switch 2-2, the bus 1, and the lower guide body 17 in this embodiment are all located in the insulating gas tank. The incoming hard bare conductor 12 is accessed from a rear position of the second side cabinet 200.
The busbar 7 is connected with the plug-in arrester 5. The plug-in type arrestor 5 represents a certain phase a/B/C, and the plug-in type arrestors 5 shown in fig. 3 (a) represent A, B, C three phases, respectively. The quantity and the arrangement sequence of other electrical components are basically consistent with those of the cable lower inlet cabinet.
This second embodiment can be as the last inlet wire gas insulated switchgear of hard bare conductor. The hard bare conductor is converted into a cabinet type similar to a cable lower inlet wire cabinet by the hard bare conductor through the lower guide body in the cabinet, so that the cabinet type is beneficial to batch production.
Fig. 5 and fig. 6 show a third embodiment of the gas insulated switchgear of the present invention. The arrangement of the electrical components of the third embodiment is substantially the same as that of the first embodiment, except that: 1. the busbar 7 is connected with the plug-in type arrester 5 and the plug-in type fuse 19, and the bus voltage transformer 20 is connected with the plug-in type fuse 19; 2. the bus 1 is also provided with a bus maintenance grounding switch 18, and the grounding switch 18 is positioned in the insulating gas box and can be used for power failure maintenance of the bus 1; 3. the secondary cable compartment 11 occupies a larger space in the lower, middle or even middle upper part of the first side cabinet 100, and the corresponding service area 10 correspondingly occupies a larger space in the second side cabinet 200. The bus 1 is connected with a bus bar 7 through a three-position switch.
The third embodiment can be used as a bus-mounted gas insulated switchgear.
The fourth embodiment of the gas insulated switchgear of the present invention refers to fig. 7, fig. 8 and fig. 9. The electrical component arrangement of the fourth embodiment is substantially the same as that of the first embodiment, except that: 1. the busbar 7 is arranged on one side in the second side cabinet 200 along the height direction, and the first three-position switch 2-1 is connected to the busbar 1 through the busbar 7; 2. the bus bar 7 is not plugged with other electrical appliances.
The fourth specific embodiment can be used as a sectional isolation gas insulation switch cabinet, and the sectional breaker cabinet and the isolation switch cabinet are combined into a whole.
It should be noted that the above describes exemplifying embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and the changes and modifications are intended to fall within the scope of the present invention as claimed.
Claims (10)
1. A gas insulated switchgear comprises a switchgear body, and is characterized in that the switchgear body comprises a first side cabinet and a second side cabinet along the width direction of the switchgear body; the first side cabinet comprises a relay chamber, an operating mechanism and a secondary cable chamber which are arranged from top to bottom along the height direction; the second side cabinet comprises a pressure relief channel, an insulating gas box, an overhaul area and secondary cable channels positioned on two sides of the overhaul area, wherein the pressure relief channel, the insulating gas box and the overhaul area are arranged from top to bottom along the height direction; a bus bar, a bus, a vacuum circuit breaker, a first three-position switch and a second three-position switch which are electrically connected with each other are arranged in the insulating gas box; the pressure relief channel is located above the bus and parallel to the bus.
2. The gas insulated switchgear of claim 1, wherein a current transformer is further disposed in the insulating gas box, the first three-position switch, the current transformer, the vacuum circuit breaker, and the second three-position switch are sequentially disposed above the busbar, and the second three-position switch is finally connected to the bus bar on the side.
3. A gas-insulated switchgear cabinet as claimed in claim 2, characterized in that the busbar bottom is connected to a plug-in arrester and a three-phase plug-in cable terminal, or to a four-phase plug-in cable terminal.
4. A gas-insulated switchgear cabinet as claimed in any of claims 1 to 3, characterized in that the gas-insulated switchgear cabinet is a cable down-conductor gas-insulated switchgear cabinet.
5. A gas insulated switchgear, as claimed in any of claims 1 to 3, characterized in that said second side cabinet is further provided with hard bare conductor of incoming line; and the hard bare conductor of the incoming line is connected into the lower guide body in the insulating gas box through the sleeve above the second side cabinet and is finally connected into the busbar.
6. The gas-insulated switchgear as claimed in claim 5, wherein said gas-insulated switchgear is a hard bare conductor top-wired gas-insulated switchgear.
7. A gas-insulated switchgear cabinet as claimed in claim 1 or 2, characterized in that the busbar is connected to a plug-in arrester and a plug-in fuse connected to a busbar potential transformer; and a bus maintenance grounding switch is also arranged on the bus.
8. A gas-insulated switchgear as claimed in claim 7, characterized in that the gas-insulated switchgear is a switchgear cabinet.
9. A gas insulated switchgear as claimed in claim 1, characterized in that said busbar is arranged on one side of the inside of the second side cabinet in the direction of height; the first three-position switch is connected to the bus through the bus bar.
10. A gas-insulated switchgear cabinet as claimed in claim 9, characterized in that the gas-insulated switchgear cabinet is a sectionalized gas-insulated switchgear cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122479713.9U CN217427474U (en) | 2021-10-14 | 2021-10-14 | Gas insulation switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122479713.9U CN217427474U (en) | 2021-10-14 | 2021-10-14 | Gas insulation switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217427474U true CN217427474U (en) | 2022-09-13 |
Family
ID=83168715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122479713.9U Active CN217427474U (en) | 2021-10-14 | 2021-10-14 | Gas insulation switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217427474U (en) |
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2021
- 2021-10-14 CN CN202122479713.9U patent/CN217427474U/en active Active
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