CN-224233209-U - Gas-insulated switchgear

Abstract

A gas-insulated switchgear includes a first spacer unit and a second spacer unit, each including a corresponding first accommodating case, a second accommodating case, and a third accommodating case having at least partially the same structure, the first accommodating case including a circuit breaker control mechanism, the second accommodating case being filled with an insulating gas and including a circuit breaker and an isolating ground switch, the third accommodating case including a cable terminal for connecting a cable, the first accommodating case being disposed above the second accommodating case, the third accommodating case being disposed adjacent to the second accommodating case on at least one side thereof, the first spacer unit being detachably connected to the second spacer unit. The design is favorable for installation and maintenance, can realize the interchange and the reuse of parts, is convenient for design verification and production and manufacture, and reduces the research and development and production cost.

Inventors

• WU JIEYUE
• ZHANG SHENGLAN

Assignees

• 伊顿电力设备有限公司

Dates

Publication Date

20260512

Application Date

20250604

Claims (10)

1. 1. A gas-insulated switchgear, characterized by comprising: a first spacer unit including a first accommodating case, a second accommodating case, and a third accommodating case; a second spacer unit including a first accommodating case, a second accommodating case, and a third accommodating case; Wherein the first, second and third accommodation cases of the first spacing unit have at least partially the same structures as the first, second and third accommodation cases of the second spacing unit, respectively; The first accommodating case includes a circuit breaker control mechanism, the second accommodating case is filled with an insulating gas and includes a circuit breaker and an isolating ground switch, wherein the circuit breaker and the isolating ground switch in the first interval unit are connected in series between a cable terminal and a first intermediate node, the circuit breaker in the second interval unit is connected in series between two cable terminals with the isolating ground switch via a second intermediate node, and the third accommodating case includes a cable terminal for connecting a cable; The first accommodating case is disposed above the second accommodating case, the third accommodating case is disposed adjacent to the second accommodating case on at least one side of the second accommodating case, and the first spacing unit is detachably connected with the second spacing unit by connecting the first intermediate node with the second intermediate node.
2. 2. The gas-insulated switchgear device according to claim 1, wherein the first, second and third accommodation cases of the first spacing unit have the same structure as the first, second and third accommodation cases of the second spacing unit, respectively.
3. 3. The gas-insulated switchgear device according to claim 1, wherein the number of the third accommodation cases is at least one and corresponds to the number of the outgoing line directions of the cables one by one.
4. 4. The gas-insulated switchgear device according to claim 1, characterized in that the first spacer unit further comprises a fourth housing shell comprising control means for the gas-insulated switchgear device, the fourth housing shell being arranged on one side of the second housing shell of the first spacer unit, the fourth housing shell having at least partially the same structure as the third housing shell at the corresponding position of the second spacer unit.
5. 5. The gas-insulated switchgear device according to claim 1, wherein the third accommodation case is provided with a connection port, the first spacing unit and the second spacing unit are connected by a cable, and the connection port of the third accommodation case of the first spacing unit is connected with the connection port of the third accommodation case of the second spacing unit by the cable.
6. 6. The gas-insulated switchgear device according to claim 1, characterized in that the first intermediate node and the second intermediate node are configured as the cable terminals, the first spacing unit and the second spacing unit are connected by cables, the number of the third accommodation cases of the first spacing unit is two, and the number of the third accommodation cases of the second spacing unit is three.
7. 7. The gas-insulated switchgear device according to claim 6, wherein two third accommodation cases of the first spacing unit are disposed adjacently up and down on the same side of the second accommodation case, two third accommodation cases of the second spacing unit are disposed adjacently up and down on the same side of the second accommodation case, and another third accommodation case of the second spacing unit is disposed on the other side of the second accommodation case.
8. 8. A gas-insulated switchgear device as claimed in claim 1, wherein one of the second accommodation casing of the first spacer unit and the second accommodation casing of the second spacer unit is further provided with a connection flange, the other one being further provided with a connection conductor, the connection flange serving as one of the first intermediate node and the second intermediate node, the connection conductor serving as the other one of the first intermediate node and the second intermediate node.
9. 9. The gas-insulated switchgear device according to claim 8, wherein the number of the third accommodation cases of the first spacing unit is one, the number of the third accommodation cases of the second spacing unit is two, the third accommodation case of the first spacing unit is provided in a first partial space of one side of the second accommodation case of the first spacing unit, and one third accommodation case of the second spacing unit is provided in a second partial space of one side of the second accommodation case of the second spacing unit, so that the first partial space and the second partial space can be provided in combination on one side of the second accommodation case when the first spacing unit and the second spacing unit are connected.
10. 10. The gas-insulated switchgear device according to claim 1, wherein the second containing case is filled with clean air.

Description

Gas-insulated switchgear Technical Field The utility model relates to the technical field of current collection system switch configuration, in particular to a gas-insulated switch device. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art to aid in the understanding of the present disclosure. At the moment of the vigorous development of offshore wind power, the switch configuration of a current collection system of an offshore wind turbine tower is of great importance. Currently, there are three schemes of a traditional switch configuration, a partial switch configuration and a complete switch configuration for the current collecting system switch configuration. In the partial switching arrangement and the complete switching arrangement, the switching device can be either a circuit breaker or a load switch or a remotely controllable disconnector. The load switch or the isolating switch is widely applied to the market due to the relatively low manufacturing cost. However, when the submarine cable fails, the load switch or the disconnecting switch is used as a switch on the collector line, and after the breaker at the head end of the collector line is disconnected, the load switch or the disconnecting switch before the failure point is remotely disconnected, and then the breaker at the head end of the collector line is closed again to restore the power supply. In the process, the fan before the fault point needs to stop power supply briefly, which not only affects the power generation efficiency of the wind power plant, but also can cause unnecessary damage to fan equipment. In addition, as the circuit breakers at the head end of the current collecting line are required to be disconnected due to faults on the current collecting submarine cable, the electric life of the circuit breakers at the head end bears larger pressure, and the maintenance difficulty and cost of the system are further increased. Disclosure of utility model It is therefore an object of the present utility model to overcome the drawbacks of the prior art described above by providing a gas insulated switchgear comprising a first compartment comprising a first, a second and a third containment housing, a second compartment comprising a first, a second and a third containment housing, wherein the first, the second and the third containment housings of the first compartment have at least partially the same structure as the first, the second and the third containment housings of the second compartment, respectively, the first compartment comprising a circuit breaker control mechanism, the second compartment being filled with an insulating gas and comprising a circuit breaker and an isolating and grounding switch, wherein the circuit breaker and the isolating and grounding switch in the first compartment are connected in series between a cable termination and a first intermediate node, the circuit breaker and the third compartment in the second compartment being connected in series between two cable terminations via a second intermediate node and an isolating and grounding switch, the second compartment comprising a second cable termination and a second compartment being arranged adjacent to the first compartment and the second compartment, the second compartment being connected in the compartment. In some embodiments, it is preferable that the first, second, and third receiving cases of the first spacer unit have the same structures as the first, second, and third receiving cases of the second spacer unit, respectively. In some embodiments, preferably, the number of the third accommodating cases is at least one, and corresponds to the number of the cable outgoing directions one by one. In some embodiments, preferably, the first spacing unit further includes a fourth accommodating case including a control device for the gas-insulated switchgear device, the fourth accommodating case being disposed at one side of the second accommodating case of the first spacing unit, the fourth accommodating case having at least partially the same structure as the third accommodating case at the corresponding position of the second spacing unit. In some embodiments, preferably, the third accommodating case is provided with a connection port, the first spacer unit and the second spacer unit are connected by a cable, and the connection port of the third accommodating case of the first spacer unit is connected with the connection port of the third accommodating case of the second spacer unit by the cable. In some embodiments, preferably, the first intermediate node and the second intermediate node are configured as the cable terminals, the first spacing unit and the second spacing unit are connected by cables, the number of the third accommodating cases of the first spacing unit is two, and the number of the third accommodating cases of the second spacing uni