CN205646613U - Gas -insulated metal enclosed switchgear and GIS power station of using this equipment - Google Patents

Abstract

The utility model relates to a gas-insulated metal-enclosed switchgear and a GIS power station using the switchgear. The gas-insulated metal-enclosed switchgear includes a horizontal circuit breaker, a current transformer and a combined isolation and grounding switch. The right outlet, the left outlet and the right outlet are respectively docked with the current transformer, and the interface of the combined isolating grounding switch is in an L-shaped distribution. The interface is composed of the first interface part and the It is composed of the second interface part for connecting with the bus bar, and the second interface part is arranged horizontally. The overall GIS has a U-shaped layout structure, which greatly reduces the occupied space in the horizontal direction and effectively reduces the equipment footprint. The interface of the combined isolation and grounding switch is distributed in an L shape, so that the vertical upward main conductive circuit is turned horizontally, which can save the usage of the busbar and the cylinder, and reduce the cost.

Description

Gas-insulated metal-enclosed switchgear and GIS power station using it

technical field

The utility model relates to a gas-insulated metal-enclosed switchgear and a GIS power station using the switchgear.

Background technique

Gas-insulated metal-enclosed switchgear (GIS) is a common device in the field of power equipment, including circuit breakers, current transformers, isolating earthing switches and other main components. As shown in Fig. 1, the existing gas-insulated metal-enclosed switchgear includes a horizontal circuit breaker 10, the left and right ends of the cylinder of the circuit breaker 10 are respectively connected to current transformers 20, and each current transformer 20 is connected to a combined isolation grounding The switch 30, the combined isolating and grounding switch 30 is connected to the horizontal busbar on the left or right, and the interfaces of the combined isolating and grounding switch 30 are distributed in a Z shape. The interfaces of each component in this gas-insulated metal-enclosed switchgear are arranged horizontally, and the whole is arranged in a straight line structure, which has the problem of occupying a large area.

Utility model content

The purpose of the utility model is to provide a gas-insulated metal-enclosed switchgear with reduced floor space and a GIS power station using the switchgear.

In order to achieve the above purpose, the technical solution of the gas-insulated metal-enclosed switchgear of the utility model is: the gas-insulated metal-enclosed switchgear includes a horizontal circuit breaker, a current transformer and a combined isolation grounding switch, and the circuit breaker includes a circuit breaker cylinder, The upper side of the circuit breaker cylinder is provided with a left outlet and a right outlet arranged at intervals from left to right, and the left outlet and the right outlet are respectively connected with the current transformer, and the interface of the combined isolation grounding switch is arranged in an L shape. , the interface is composed of a first interface part for installation on the current transformer and a second interface part for connecting with the busbar, and the second interface part is arranged horizontally.

The main circuit between the circuit breaker and the current transformer includes a conductive structure turning horizontally upward from the circuit breaker to the current transformer.

The conductive structure of each current transformer is installed in the corresponding outlet through pot insulators.

Between the left and right outlets of the circuit breaker and the cylinder body of the circuit breaker are respectively provided reinforcing ribs surrounding the outlets.

The technical scheme of the utility model GIS power station is: the GIS power station includes gas-insulated metal-enclosed switchgear, the gas-insulated metal-enclosed switchgear includes a horizontal circuit breaker, a current transformer and a combined isolation grounding switch, and the circuit breaker includes a circuit breaker cylinder , the upper side of the circuit breaker cylinder is provided with left and right outlets arranged at intervals from left to right, the left outlet and the right outlet are respectively connected with the current transformer, and the interface of the combined isolation grounding switch is L-shaped Distribution, the interface is composed of a first interface part for installation on the current transformer and a second interface part connected with the busbar, and the second interface part is arranged horizontally.

The GIS power station adopts 3/2 wiring, including three left and right gas-insulated metal-enclosed switchgears connected sequentially through busbars, and the second interface part of the combined isolation grounding switch of the gas-insulated metal-enclosed The end of the tee opposite to the second interface part is connected to the bus bar, the tee is connected downward to the first bus bar outlet interface, and the first line of the combined isolating grounding switch connected to the right outlet of the gas-insulated metal-enclosed switchgear on the left The second interface part is connected to the busbar. The second interface part of the combined isolating earthing switch connected to the left outlet of the gas-insulated metal-enclosed switchgear on the left side is connected downwards with the second busbar outlet interface through a tee. The gas-insulated metal-enclosed switchgear on the right The second interface of the combined isolating and earthing switch connected to the left outlet of the insulated metal-enclosed switchgear is connected to the busbar, and the second interface of the combined isolating and earthing switch connected to the right outlet of the gas-insulated metal-enclosed switchgear on the right is connected to the busbar. The right connection has the second busbar outlet interface.

The left end of the gas-insulated metal-enclosed switchgear on the left and the right end of the gas-insulated metal-enclosed switchgear on the right are provided with support structures.

The standard interval incoming and outgoing lines of each 3/2 string are connected to the casing through the first bus outlet interface, and the standard intervals of each 3/2 string are butted through the second bus outlet interface.

The beneficial effect of the utility model is: by setting the left and right outlets on the upper side of the circuit breaker cylinder to connect with the current transformer, the combined isolation grounding switch is installed on the current transformer, so that the gas-insulated metal-enclosed switchgear as a whole has a U shape. Compared with the horizontal butt joint arrangement of various components in the existing gas-insulated metal-enclosed switchgear, the type layout structure greatly reduces the occupied space in the horizontal direction and effectively reduces the equipment footprint. At the same time, the interface of the combined isolation and grounding switch is distributed in an L shape, so that the vertical main conductive circuit turns horizontal. Compared with the existing Z-shaped distribution interface, it can save the use of busbars and cylinders and reduce costs.

Description of drawings

Fig. 1 is a schematic diagram of an existing gas-insulated metal-enclosed switchgear;

Fig. 2 is a schematic diagram of the utility model gas-insulated metal-enclosed switchgear;

Fig. 3 is a schematic diagram of a 3/2 wiring example of the GIS power station of the present invention.

detailed description

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

A specific embodiment of the gas-insulated metal-enclosed switchgear of the present invention is shown in FIG. 2 . The gas-insulated metal-enclosed switchgear includes a horizontal circuit breaker 1 , a current transformer 2 and a combined isolation grounding switch 3 . The circuit breaker 1 includes a circuit breaker cylinder. The upper side of the circuit breaker cylinder is provided with a left outlet 11 and a right outlet 12 arranged at intervals from left to right. The lower ends of the two current transformers 2 are respectively butted and installed on the left side of the circuit breaker cylinder. On the outlet 11 and the right outlet 12. The interface of the combined isolation and grounding switch is distributed in an L shape. The interface is composed of a first interface part 31 which is docked with the upper end of the current transformer 2 and a second interface part 32 for connecting to the busbar. The opening of the first interface part 31 faces Down, set vertically; second interface part 32 opens to the right, set horizontally. The use of the L-type combined isolation grounding switch can turn the vertical upward main conductive circuit to the level so as to connect with the busbar, which can effectively save the usage of the busbar cylinder. The main circuit between the circuit breaker 1 and the current transformer 2 includes a conductive structure 13 that turns horizontally upward from the circuit breaker 1 to the current transformer 2. The two conductive structures 13 are respectively installed in the left outlet and the right outlet through pot insulators. inside the outlet. Between the left outlet 11 and the right outlet 13 of the circuit breaker and the cylinder body of the circuit breaker, reinforcing ribs 14 surrounding the outlets are respectively provided.

In this embodiment, the circuit breaker cylinder is tailor-welded with high-strength stainless steel and special steel, and reinforcing ribs are provided at the outlet to solve the problems of eddy current and cylinder strength.

The specific embodiment of the GIS power station of the present utility model, as shown in Figure 3, the GIS power station adopts 3/2 wiring, and the 3/2 wiring is connected by three circuit breakers to the lead wires of two components (lines or generator-transformer groups). Composed of two sets of busbars, each circuit is connected to the busbar through a circuit breaker, and the two circuits are separated by a connecting circuit breaker to form a string. In this embodiment, the GIS power station includes three left and right gas-insulated metal-enclosed switchgears connected sequentially through bus bars. same. The second interface parts of the two combined isolating and grounding switches of the gas-insulated metal-enclosed switchgear 100 located in the middle are connected with a tee. Bus outlet interface 5. The second interface part of the combined isolating earthing switch connected to the right outlet of the gas-insulated metal-enclosed switchgear 200 on the left is connected to the bus bar 4, and the combined isolator connected to the left outlet of the gas-insulated metal-enclosed switchgear 200 on the left The second interface part of the grounding switch is downwardly connected with the second bus outlet interface 6 through a tee. The second interface part of the combined isolating earthing switch connected to the left outlet of the gas-insulated metal-enclosed switchgear 300 on the right is connected to the bus bar 4, and the combined isolator connected to the right outlet of the gas-insulated metal-enclosed switchgear 300 on the right The second interface part of the grounding switch is connected to the right with the second bus outlet interface 6 . The left end of the gas-insulated metal-enclosed switchgear 200 on the left and the right end of the gas-insulated metal-enclosed switchgear 300 on the right are both provided with supporting structures. Each gas-insulated metal-enclosed switchgear is connected through the busbar 4, and the standard interval of each 3/2 series of incoming and outgoing lines is connected to the bushing through the first bus outlet connection 5, and the standard interval of each 3/2 series is connected through the second busbar Outlet interface 6 for docking.

In the utility model, the gas-insulated metal-enclosed switchgear adopts a U-shaped layout structure, which can save floor area and usage of bus bars. The main wiring of the 800kV GIS power station mainly adopts the 3/2 wiring form, which can save 130 meters of busbar and 2600kg of SF ₆ gas for each standard 3/2 interval in practical engineering.

Claims (8)

1. Gas-insulated metal-enclosed switchgear, including a horizontal circuit breaker, a current transformer and a combined isolation grounding switch, the circuit breaker includes a circuit breaker cylinder, and it is characterized in that: the upper side of the circuit breaker cylinder is equipped with left and right The left outlet and the right outlet are arranged at intervals, the left outlet and the right outlet are respectively connected with the current transformer, and the interface of the combined isolation grounding switch is L-shaped, and the interface is used to be installed on the current transformer. It is composed of the first interface part on the upper part and the second interface part for connecting with the bus bar, and the second interface part is arranged horizontally. 2. The gas-insulated metal-enclosed switchgear according to claim 1, wherein the main circuit between the circuit breaker and the current transformer comprises a conductive structure that turns horizontally upward from the circuit breaker to the current transformer. 3. The gas-insulated metal-enclosed switchgear according to claim 2, characterized in that: the conductive structure of each current transformer is installed in the corresponding outlet through pot insulators. 4. The gas-insulated metal-enclosed switchgear according to claim 1, 2 or 3, characterized in that: between the left and right outlets of the circuit breaker and the cylinder body of the circuit breaker, there are reinforcements surrounding the outlets. ribs. 5. GIS power station, including gas-insulated metal-enclosed switchgear, gas-insulated metal-enclosed switchgear includes a horizontal circuit breaker, a current transformer and a combined isolating earthing switch, and the circuit breaker includes a circuit breaker cylinder, which is characterized in that: The upper side of the circuit breaker cylinder is provided with left and right outlets at left and right intervals. The left and right outlets are respectively connected with the current transformers. The interface of the combined isolation grounding switch is L-shaped. The interface is composed of a first interface part for installation on the current transformer and a second interface part connected with the bus bar, and the second interface part is arranged horizontally. 6. The GIS power station according to claim 5, characterized in that: the GIS power station adopts 3/2 wiring, including three left and right gas-insulated metal-enclosed switchgears connected sequentially through bus bars, and the gas-insulated metal-enclosed switchgear located in the middle The second interface of the combined isolating and grounding switch of the closed switchgear is connected with a tee, and the end of the tee opposite to the second interface is connected to the bus bar, and the tee is connected downward with the first bus outlet interface, and the gas insulation on the left side The second interface of the combined isolating and earthing switch connected to the right outlet of the metal-enclosed switchgear is connected to the busbar, and the second interface of the combined isolating and earthing switch connected to the left outlet of the gas-insulated metal-enclosed switchgear on the left is connected to the bus through three The outlet of the second busbar is connected to the bottom of the passage. The second interface of the combined isolating earthing switch connected to the left outlet of the gas-insulated metal-enclosed switchgear on the right is connected to the busbar. The gas-insulated metal-enclosed switchgear on the right The second interface part of the combined isolating earthing switch connected to the right outlet is connected to the right with the second busbar outlet interface. 7. The GIS power station according to claim 6, characterized in that: the left end of the gas-insulated metal-enclosed switchgear on the left and the right end of the gas-insulated metal-enclosed switchgear on the right are provided with support structures. 8. The GIS power station according to claim 6, characterized in that: each 3/2 string of standard interval incoming and outgoing lines is connected to the bushing through the first bus outlet interface, and each 3/2 string of standard intervals is connected through the second The bus outlet interface is connected.