GIS capable of being dismounted and maintained without power failure

Abstract

The utility model belongs to the field of large power transmission and distribution, and discloses a GIS (Gas Insulated Switchgear) capable of being disassembled, assembled and maintained without power cut, which comprises a circuit breaker shell, a first isolating switch shell, a second isolating switch shell, a first connecting shell, a second connecting shell, a main bus side sleeve, an incoming and outgoing line side sleeve and a load side grounding switch, the first disconnecting switch shell and the second disconnecting switch shell are both arranged on the circuit breaker shell in a conducting mode, the first disconnecting switch shell accommodates a main bus side disconnecting switch, the second disconnecting switch shell accommodates an incoming and outgoing line side disconnecting switch, and the main bus side sleeve, the first connecting shell and the first disconnecting switch shell are sequentially coupled. The wiring module is used for wiring branch buses led out from a main bus side; the incoming and outgoing line side sleeve, the second connection shell and the second isolation switch shell are sequentially coupled and used for wiring of branch buses led out from the incoming and outgoing line side, and the load side grounding switch is used for grounding of the branch buses led out from the incoming and outgoing line side.

Description

Technical Field

[0001] The utility model belongs to the field of large-scale power transmission and distribution, and particularly relates to a GIS for disassembly, installation and maintenance without power interruption. Background Art

[0002] The GIS is encapsulated with SF6 gas insulation in a sealed shell. When it includes a circuit breaker and serves as the incoming and outgoing line interval of a large-scale power transmission and distribution system, its advantages are clear, concise and compact wiring, convenient installation, maintenance and repair, and high operation reliability.

[0003] At present, in the application of large-scale power transmission and distribution systems, multiple GISs containing circuit breakers often draw out from a group of main buses together to form multiple independent incoming and outgoing line intervals. However, in this application, when it is necessary to perform fault repair or replacement on one of the multiple GISs, the corresponding main bus needs to be powered off before repair or replacement, which makes the other several incoming and outgoing line intervals, that is, the GISs, have no current, thus affecting the operation flexibility and reliability of the power transmission and distribution system. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a GIS for disassembly, installation and maintenance without power interruption. When serving as the incoming and outgoing line interval and performing circuit breaker repair or replacement, it is not necessary to power off the corresponding main bus, thus greatly improving the operation flexibility and reliability of the power transmission and distribution system.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A GIS for disassembly, installation and maintenance without power interruption is arranged between the main bus side and the incoming and outgoing line side. It is characterized by including: a circuit breaker housing, a first disconnector housing, a second disconnector housing, a first connection housing, a second connection housing, a main bus side bushing, an incoming and outgoing line side bushing, and a load side earthing switch. The circuit breaker housing accommodates an interval circuit breaker. The first disconnector housing and the second disconnector housing are both conductively arranged on the circuit breaker housing. The first disconnector housing accommodates a main bus side disconnector, and the second disconnector housing accommodates an incoming and outgoing line side disconnector. The main bus side bushing, the first connection housing, and the first disconnector housing are sequentially coupled for the branch bus wiring led out from the main bus side; the incoming and outgoing line side bushing, the second connection housing, and the second disconnector housing are sequentially coupled for the branch bus wiring led out from the incoming and outgoing line side. The load side earthing switch is used for earthing the branch bus led out from the incoming and outgoing line side.

[0007] Preferably, both the first disconnector housing and the second disconnector housing have closed conductive ends and are conductively arranged on the circuit breaker housing through the closed conductive ends, and the closed conductive ends are pot-type insulators with plug-in conductive parts.

[0008] Preferably, the utility model further includes a bracket assembly, which includes a pair of branch busbar brackets and a pair of circuit breaker brackets that are both vertically arranged. The bottoms of the pair of branch busbar brackets are both arranged on a predetermined working surface. The first connection housing and the second connection housing are respectively arranged at the tops of the pair of branch busbar brackets. The bottoms of the pair of circuit breaker brackets are both arranged on the predetermined working surface. The opposite ends of the circuit breaker housing are respectively arranged at the tops of the pair of circuit breaker brackets.

[0009] Further, the circuit breaker bracket is shorter than the branch busbar bracket, and the circuit breaker bracket is a two-section support bracket.

[0010] Preferably, the utility model further includes a main busbar side current transformer housing, which is coupled between the circuit breaker housing and the first disconnecting switch housing. The main busbar side current transformer housing houses a main busbar side current transformer. The incoming and outgoing line side current transformer housing is coupled between the circuit breaker housing and the second disconnecting switch housing. The incoming and outgoing line side current transformer housing houses an incoming and outgoing line side current transformer.

[0011] Further, the utility model further includes two line side earthing switches, which are respectively arranged on the first disconnecting switch housing and the second disconnecting switch housing. One line side earthing switch is used for grounding the lead-out of the node between the main busbar side disconnecting switch and the main busbar side current transformer, and the other line side earthing switch is used for grounding the lead-out of the node between the incoming and outgoing line side disconnecting switch and the incoming and outgoing line side current transformer.

[0012] Preferably, the utility model further includes a first extension bushing, which is coupled between the first disconnecting switch housing and the first connection housing. The first extension bushing is used for the routing of the branch busbar led out from the main busbar side; a second extension bushing, which is coupled between the second disconnecting switch housing and the second connection housing. The second extension bushing is used for the routing of the branch busbar led out from the incoming and outgoing line side.

[0013] Preferably, the number is multiple, and they all correspond to a group of main busbars and form multiple independent incoming and outgoing line intervals.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Since the GIS for live disassembly and maintenance of the present utility model includes a circuit breaker housing, a first disconnect switch housing, a second disconnect switch housing, a first connection housing, a second connection housing, a main bus side bushing, an incoming / outgoing line side bushing, and a load side earthing switch, the circuit breaker housing houses an isolating circuit breaker. The first disconnect switch housing and the second disconnect switch housing are both conductively arranged on the circuit breaker housing. The first disconnect switch housing houses a main bus side disconnect switch, and the second disconnect switch housing houses an incoming / outgoing line side disconnect switch. The main bus side bushing, the first connection housing, and the first disconnect switch housing are sequentially coupled for the routing of the branch busbar led out from the main bus side. The incoming / outgoing line side bushing, the second connection housing, and the second disconnect switch housing are sequentially coupled for the routing of the branch busbar led out from the incoming / outgoing line side. The load side earthing switch is used for earthing the branch busbar led out from the incoming / outgoing line side. When the isolating circuit breaker is being repaired or replaced, the main bus side disconnect switch, the isolating circuit breaker, the incoming / outgoing line side disconnect switch, and the load side earthing switch are in the open state, and the insulating gas pressure within the normal insulation requirements is maintained in the first disconnect switch housing and the second disconnect switch housing. At this time, even if the insulating gas in the circuit breaker housing is bled due to repair or replacement, it has nothing to do with the current state on the main bus side, that is, the other incoming / outgoing line intervals led from this main bus side can still operate normally. Therefore, when the present utility model is used as an incoming / outgoing line interval and the isolating circuit breaker is being repaired or replaced, there is no need to power off the corresponding main bus, thus greatly improving the operation flexibility and reliability of the power transmission and distribution system.

[0016] 2. Since the circuit breaker support of the present utility model is shorter than the branch busbar support and the circuit breaker support is a two-stage support frame, the potential energy of the isolating circuit breaker of the present utility model is smaller. With the assistance of the two-stage support, it is not easy to vibrate due to external factors and is more stable, thereby prolonging the service life of the isolating circuit breaker.

[0017] 3. Since the present utility model further includes a main bus side current transformer housing and a line side current transformer housing. The main bus side current transformer housing is coupled between the circuit breaker housing and the first disconnect switch housing, and the main bus side current transformer housing houses a main bus side current transformer. The line side current transformer housing is coupled between the circuit breaker housing and the second disconnect switch housing, and the incoming / outgoing line side current transformer housing houses an incoming / outgoing line side current transformer. Therefore, the incoming and outgoing lines on both sides of the circuit breaker of the present utility model respectively correspond to pass through the main bus side current transformer and the incoming / outgoing line side current transformer, so that the current on both sides of the isolating circuit breaker can be measured more accurately through the main bus side current transformer and the incoming / outgoing line side current transformer.

[0018] 4. Since the present utility model further includes a first extension sleeve and a second extension sleeve, the first extension sleeve is coupled between the first disconnector housing and the first connection housing, and the first extension sleeve is used for the routing of the branch busbar led out from the main busbar side; the second extension sleeve is coupled between the second disconnector housing and the second connection housing, and the second extension sleeve is used for the routing of the branch busbar led out from the incoming and outgoing line side. Therefore, the present utility model can flexibly set the position of the circuit breaker housing according to the actual physical distances on the main busbar side and the incoming and outgoing line side through the auxiliary extension of the first extension sleeve and the second extension sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of a GIS for power-off disassembly, installation and maintenance according to an embodiment of the present utility model;

[0020] Figure 2 Circuit schematic diagram implemented by a GIS for power-off disassembly, installation and maintenance according to an embodiment of the present utility model;

[0021] Figure 3 Embodiment schematic diagram of multiple GISs for power-off disassembly, installation and maintenance according to an embodiment of the present utility model sharing a main busbar.

[0022] In the figures: 100, GIS for power-off disassembly, installation and maintenance; A, branch busbar led out from the main busbar side; B, branch busbar led out from the incoming and outgoing line side; 1, circuit breaker housing; 1a, sectional circuit breaker; 2, main busbar side current transformer housing; 2a, main busbar side current transformer; 3, incoming and outgoing line side current transformer housing; 3a, incoming and outgoing line side current transformer; 4, first disconnector housing; 4a, main busbar side disconnector; 41, closed conduction end; 5, second disconnector housing; 5a, incoming and outgoing line side disconnector; 6, first extension sleeve; 7, second extension sleeve; 8, first connection housing; 9, second connection housing; 10, main busbar side sleeve; 11, incoming and outgoing line side sleeve; 12, load side earthing switch; 13, line side earthing switch; 14, support assembly; 141, branch busbar support; 142, circuit breaker support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the following embodiments will specifically describe the GIS for power-off disassembly, installation and maintenance of the present utility model in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model.

[0024] As Figure 1 and Figure 2As shown, the GIS 100 for maintenance and disassembly without power interruption in this embodiment is arranged between the main bus side and the incoming and outgoing line sides. Specifically, the GIS 100 for maintenance and disassembly without power interruption forms an incoming and outgoing line interval. In this embodiment, the main bus side is an overhead bus.

[0025] The GIS 100 for maintenance and disassembly without power interruption includes a circuit breaker housing 1, a main bus side current transformer housing 2, an incoming and outgoing line side current transformer housing 3, a first disconnector housing 4, a second disconnector housing 5, a first extension bushing 6, a second extension bushing 7, a first connection housing 8, a second connection housing 9, a main bus side bushing 10, an incoming and outgoing line side bushing 11, and a support assembly 14.

[0026] The circuit breaker housing 1 houses an interval circuit breaker 1a. Specifically, on both sides corresponding to the interval circuit breaker 1a, the circuit breaker housing 1 has two flange openings open to the outside. In this embodiment, the circuit breaker housing 1 is a horizontal circuit breaker housing.

[0027] The main bus side current transformer housing 2 houses a main bus side current transformer 2a and an incoming and outgoing line side current transformer housing 3. The incoming and outgoing line side current transformer housing 3 houses an incoming and outgoing line side current transformer 3a. And the main bus side current transformer housing 2 and the incoming and outgoing line side current transformer housing 3 are both conductively coupled to the circuit breaker housing 1. Specifically, the main bus side current transformer housing 2 and the incoming and outgoing line side current transformer housing 3 are respectively arranged at the two flange openings of the circuit breaker housing 1. The wires on both sides of the interval circuit breaker 1a respectively pass through the main bus side current transformer 2a and the incoming and outgoing line side current transformer 3a in the main bus side current transformer housing 2 and the incoming and outgoing line side current transformer housing 3.

[0028] Both the first disconnector housing 4 and the second disconnector housing 5 are conductively arranged on the circuit breaker housing 1. The first disconnector housing 4 houses a main bus side disconnector 4a. The main bus side current transformer housing 2 is coupled between the circuit breaker housing 1 and the first disconnector housing 4. The second disconnector housing 5 houses an incoming and outgoing line side disconnector 5a. The incoming and outgoing line side current transformer housing 3 is coupled between the circuit breaker housing 1 and the second disconnector housing 5. Specifically, the main bus side current transformer housing 2, the incoming and outgoing line side current transformer housing 3, the first disconnector housing 4, and the second disconnector housing 5 all have two flange openings open to the outside. The main bus side current transformer housing 2 and the incoming and outgoing line side current transformer housing 3 are coupled to the circuit breaker housing 1 through one flange opening, and are respectively coupled to the first disconnector housing 4 and the second disconnector housing 5 through the other flange opening by flange openings. That is, the wires on both sides of the interval circuit breaker 1a are respectively connected to one side of the main bus side disconnector 4a and the incoming and outgoing line side disconnector 5a after passing through the main bus side current transformer 2a and the incoming and outgoing line side current transformer 3a.

[0029] Both the first disconnector housing 4 and the second disconnector housing 5 have a closed conduction end 41, and are conductively arranged on the circuit breaker housing 1 through the closed conduction end 41. The closed conduction end 1 is a pot-type insulator with a plug-in conduction component (not shown in the annex). Specifically, the pot-type insulator completely closes the corresponding flange opening, and the plug-in conduction component is a static contact seat mechanism plugged thereon.

[0030] The main bus side bushing 10, the first connection housing 8, the first extension bushing 6, and the first disconnector housing 4 are sequentially coupled in order for the branch bus A routed from the main bus side; the incoming and outgoing line side bushing 11, the second connection housing 9, the second extension bushing 7, and the second disconnector housing 5 are sequentially coupled in order for the branch bus B routed from the incoming and outgoing line side. In this embodiment, the branch bus A routed from the main bus side first runs vertically downward through the main bus side bushing 10, then is converted to a horizontal run through the first connection housing 8, and finally is connected to the other side of the main bus side disconnector 4a through the first extension bushing 6; the branch bus B routed from the incoming and outgoing line side led out from the other side of the incoming and outgoing line side disconnector 5a first runs horizontally through the second extension bushing 7, then is converted to a vertically upward run through the second connection housing 9 and is sent out to the incoming and outgoing line side.

[0031] The load side earthing switch 12 is connected in series on the branch bus B routed from the incoming and outgoing line side for earthing of the branch bus B routed from the incoming and outgoing line side.

[0032] The number of line side earthing switches 13 is two, which are respectively arranged on the first disconnector housing 4 and the second disconnector housing 5. One line side earthing switch 13 is used for earthing of the node between the main bus side disconnector 4a and the main bus side current transformer 2a, and the other line side earthing switch 13 is used for earthing of the node between the incoming and outgoing line side disconnector 5a and the incoming and outgoing line side current transformer 3a.

[0033] The support assembly 14 includes a pair of branch bus supports 141 and a pair of circuit breaker supports 142 that are all vertically arranged.

[0034] The bottoms of the pair of branch bus supports 141 are all arranged on a predetermined working surface, and the first connection housing 8 and the second connection housing 9 are respectively arranged corresponding to the tops of the pair of branch bus supports 141; the bottoms of the pair of circuit breaker supports 142 are all arranged on a predetermined working surface, and the opposite ends of the circuit breaker housing 1 are respectively arranged corresponding to the tops of the pair of circuit breaker supports 142. And the circuit breaker support 142 is shorter than the branch bus support 141, and the circuit breaker support 142 is a two-section support frame, that is, the circuit breaker housing 1 is lower than the first connection housing 8 and the second connection housing 9.

[0035] Such as Figure 3As shown, during application, the number of GIS 100s that can be disassembled, maintained, and serviced without power outage is multiple, all corresponding to a set of main busbars, and multiple independent incoming and outgoing line intervals are formed.

[0036] The following describes the disassembly process of the GIS 100 that can be disassembled, maintained, and serviced without power outage in conjunction with the embodiments:

[0037] First, make the main busbar side disconnector 4a, the interval circuit breaker 1a, the incoming and outgoing line side disconnector 5a, and the load side earthing switch 12 in the open state. Then, release the insulating gas in the circuit breaker housing 1 until the internal pressure of the circuit breaker housing 1 is 1 atmospheric pressure. Next, while maintaining the supporting force on the circuit breaker housing 1, remove a section of the frame body of a pair of circuit breaker brackets 142 that is supported by the predetermined working surface. Finally, remove the circuit breaker housing 1, the main busbar side current transformer housing 2, and the incoming and outgoing line side current transformer housing 3.

[0038] The above embodiments are the preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by those of ordinary skill in the art without creative labor within the scope of the appended claims still fall within the protection scope of this patent.

Claims

1. A GIS for disassembly, maintenance and repair without power interruption, which is arranged between the main bus side and the incoming and outgoing line sides, is characterized in that Comprising: A circuit breaker housing, a first disconnector housing, a second disconnector housing, a first connection housing, a second connection housing, a main busbar side bushing, an incoming / outgoing line side bushing, and a load side earthing switch. The circuit breaker housing houses an isolating circuit breaker. The first disconnector housing and the second disconnector housing are both conductively arranged on the circuit breaker housing. The first disconnector housing houses a main busbar side disconnector, and the second disconnector housing houses an incoming / outgoing line side disconnector. The main busbar side bushing, the first connection housing, and the first disconnector housing are sequentially coupled for the routing of the branch busbar led out from the main busbar side; the incoming / outgoing line side bushing, the second connection housing, and the second disconnector housing are sequentially coupled for the routing of the branch busbar led out from the incoming / outgoing line side. The load side earthing switch is used for earthing the branch busbar led out from the incoming / outgoing line side.

2. The GIS for power-off disassembly, installation and maintenance according to claim 1, characterized in that: Among them, The first disconnector housing and the second disconnector housing both have a closed conductive end, and are conductively arranged on the circuit breaker housing through this closed conductive end, and this closed conductive end is a pot-type insulator with a plug-in conductive component.

3. The GIS for power-offless disassembly, installation and maintenance according to claim 1, wherein Further comprising: A support assembly, including a pair of branch busbar supports and a pair of circuit breaker supports that are both vertically arranged. The bottoms of the pair of branch busbar supports are both arranged on a predetermined working surface, and the first connection housing and the second connection housing are respectively arranged corresponding to the tops of the pair of branch busbar supports. The bottoms of the pair of circuit breaker supports are both arranged on the predetermined working surface, and the opposite ends of the circuit breaker housing are respectively arranged corresponding to the tops of the pair of circuit breaker supports.

4. The GIS for power-off disassembly, installation and maintenance according to claim 3, characterized in that: Among them, The circuit breaker support is shorter than the branch busbar support, and the circuit breaker support is a two-section support frame.

5. The GIS for power-offless disassembly, assembly and maintenance according to claim 1, wherein Further comprising: A main busbar side current transformer housing, coupled between the circuit breaker housing and the first disconnector housing, and the main busbar side current transformer housing houses a main busbar side current transformer. An incoming / outgoing line side current transformer housing, coupled between the circuit breaker housing and the second disconnector housing, and the incoming / outgoing line side current transformer housing houses an incoming / outgoing line side current transformer.

6. The GIS for power-offless disassembly, assembly and maintenance according to claim 5, characterized in that, Further comprising: Two line side earthing switches, respectively arranged on the first disconnector housing and the second disconnector housing. One line side earthing switch is used for earthing the lead-out of the node between the main busbar side disconnector and the main busbar side current transformer, and the other line side earthing switch is used for earthing the lead-out of the node between the incoming / outgoing line side disconnector and the incoming / outgoing line side current transformer.

7. The GIS for power-off disassembly, installation and maintenance according to claim 1, wherein Further comprising: A first extension bushing, coupled between the first disconnector housing and the first connection housing, and the first extension bushing is used for the routing of the branch busbar led out from the main busbar side. A second extension bushing, coupled between the second disconnector housing and the second connection housing, and the second extension bushing is used for the routing of the branch busbar led out from the incoming / outgoing line side.

8. The GIS for power-off disassembly and maintenance according to claim 1, wherein: There are multiple ones, all corresponding to a group of main busbars and forming multiple independent incoming and outgoing line intervals.

Images