Double bus disconnecting switch for GIS extension

Abstract

The utility model belongs to the substation engineering technical field, concretely relates to a double bus disconnecting switch for GIS extension. Second basin type insulator, first electric connection seat, first electrically conductive connecting piece, first cross electric connector, first basin type insulator, second electric connection seat, second electrically conductive connecting piece, second cross electric connector, third basin type insulator and earthing switch static contact, along the direction L of current transformer connecting end to earthing switch connecting end two by two sequentially connected. When extending GIS, can reduce power-off time, reduce power grid load loss.

Description

Technical Field

[0001] This utility model belongs to the field of substation engineering technology, specifically relating to a double busbar disconnector for GIS expansion. Background Technology

[0002] GIS equipment refers to gas-insulated, metal-enclosed switchgear, typically including bays and busbars. Normally, only terminal blocks are pre-installed on the double busbars of a GIS, one for the first busbar and one for the second. The terminal blocks consist of a straight-through cylinder and a shielding cover; the straight-through cylinder is connected to the busbar housing and located above it; the shielding cover is connected to the busbar's basin-type insulator and located within the straight-through cylinder, with the protruding part of the basin-type insulator facing upwards. When expanding a GIS, the shielding covers on the first and second busbars need to be removed. The stationary contact of the first busbar disconnector is installed at the original shielding cover location on the first busbar, i.e., the stationary contact of the first busbar disconnector is installed on the protruding part of the basin-type insulator on the first busbar; the stationary contact of the second busbar disconnector is installed at the original shielding cover location on the second busbar, i.e., the stationary contact of the second busbar disconnector is installed on the protruding part of the basin-type insulator on the second busbar.

[0003] like Figure 1As shown, the existing double busbar disconnector includes a first four-way housing 3 and a second four-way housing 4 disposed on one side of the first four-way housing 3. Both the first four-way housing 3 and the second four-way housing 4 are arranged vertically. The right interface of the first four-way housing 3 is equipped with a protruding first basin-type insulator 15 located inside the first four-way housing 3, which also serves as a current transformer connection terminal 301. The left interface of the first four-way housing 3 is connected to the right interface of the second four-way housing 4 by a protruding second basin-type insulator 16 located inside the second four-way housing 4. The first four-way housing 3 is equipped with a first cross-shaped electrical connector 10, a primary conductive connector 17, and a primary electrical connector base 18. The four connection ends of the first cross-shaped electrical connector 10 correspond one-to-one with the four interfaces of the first four-way housing 3. The second four-way housing 4 is equipped with a second cross-shaped electrical connector 13. The four connection ends of the second cross-shaped electrical connector 13 correspond one-to-one with the four interfaces of the second four-way housing 4. The right interface of the second four-way housing 4 serves as a grounding switch connection terminal 401. The original first basin-type insulator 15, the first cross-shaped electrical connector 10, the original conductive connector 17, the original electrical connector 18, the original second basin-type insulator 16, and the second cross-shaped electrical connector 13 are connected in pairs along direction L from the current transformer connection end 301 to the grounding switch connection end 401. The upper interface of the first four-way housing 3 serves as the connection interface for the first busbar disconnecting switch operating mechanism, used to connect the first busbar disconnecting switch operating mechanism. The lower interface of the first four-way housing 3 serves as the first busbar interface. The upper interface of the second four-way housing 4 serves as the connection interface for the second busbar disconnecting switch operating mechanism, used to connect the second busbar disconnecting switch operating mechanism. The lower interface of the second four-way housing 4 serves as the second busbar interface. The current transformer connection end 301 is used to connect the current transformer. The grounding switch connection end 401 is used to connect the grounding switch.

[0004] In the existing double busbar disconnector, the protrusions of the original first basin-type insulator 15 and the original second basin-type insulator 16 both face the grounding switch connection end 401. The grounding switch housing is connected to the right interface of the second four-way housing 4, and the internal components of the grounding switch are electrically connected to the right end of the second cross-shaped electrical connector 13 via a horizontal conductive rod. Therefore, during expansion, both the first and second busbars need to be de-energized simultaneously before installation can proceed. The power outage time is approximately 12 days, which is a long period and results in significant load loss for the power grid. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a double busbar disconnect switch for GIS expansion, which can reduce power outage time and reduce power grid load loss when expanding GIS.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a double busbar disconnector for GIS expansion, including a first four-way housing and a second four-way housing disposed on one side of the first four-way housing; both the first four-way housing and the second four-way housing are arranged vertically; a first basin-type insulator with a protruding part located inside the first four-way housing is connected between the left interface of the first four-way housing and the right interface of the second four-way housing; a second basin-type insulator with a protruding part located outside the first four-way housing is installed at the right interface of the first four-way housing and serves as a current transformer connection terminal; a third basin-type insulator with a protruding part located inside the second four-way housing is installed at the left interface of the second four-way housing and serves as a grounding switch connection terminal;

[0007] The upper interface of the first four-way housing serves as the connection interface for the operating mechanism of the first bus disconnect switch, and the lower interface of the first four-way housing serves as the first bus interface; the upper interface of the second four-way housing serves as the connection interface for the operating mechanism of the second bus disconnect switch, and the lower interface of the second four-way housing serves as the second bus interface.

[0008] The first four-way housing is provided with a first electrical connector, a first conductive connector, and a first cross-shaped electrical connector. The first cross-shaped electrical connector has four connecting ends, each corresponding to one of the four interfaces of the first four-way housing. The second four-way housing is provided with a second electrical connector, a second conductive connector, and a second cross-shaped electrical connector. The second cross-shaped electrical connector has four connecting ends, each corresponding to one of the four interfaces of the second four-way housing. A grounding switch stationary contact is provided outside the second four-way housing.

[0009] The second basin-type insulator, the first electrical connector, the first conductive connector, the first cross-shaped electrical connector, the first basin-type insulator, the second electrical connector, the second conductive connector, the second cross-shaped electrical connector, the third basin-type insulator, and the stationary contact of the grounding switch are connected in pairs along the direction L from the current transformer connection end to the grounding switch connection end.

[0010] Furthermore, the second four-way housing includes a four-way housing body and a horizontal connecting cylinder that are connected to each other; the four-way housing body is arranged vertically, and the horizontal connecting cylinder is located between the four-way housing body and the first basin-type insulator;

[0011] The left interface of the horizontal connecting cylinder is connected to the right interface of the four-way housing body. The right interface of the horizontal connecting cylinder, the first basin-type insulator, and the left interface of the first four-way housing are connected. The third basin-type insulator is connected to the left interface of the four-way housing body and serves as the connection terminal of the grounding switch. The protrusion of the third basin-type insulator and the second cross electrical connector are located in the four-way housing body. The four connection ends of the second cross electrical connector correspond one-to-one with the four interfaces of the four-way housing body.

[0012] Furthermore, the first conductive connector is a horizontal conductive tube.

[0013] Furthermore, the second conductive connector is a horizontal conductive rod.

[0014] Furthermore, the first electrical connector and the second electrical connector are of the same length, and the lengths of both the first electrical connector and the second electrical connector are less than the length of the stationary contact of the grounding switch.

[0015] Furthermore, both the first four-way housing and the second four-way housing are made of hard metal.

[0016] Furthermore, both the first conductive connector and the second conductive connector are made of hard conductive metal.

[0017] Furthermore, both the first conductive connector and the second conductive connector are made of copper.

[0018] Compared with the prior art, the beneficial effects of this utility model are: this utility model provides a double busbar disconnect switch for GIS expansion, which can reduce power outage time and reduce power grid load loss when expanding GIS. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an existing double busbar disconnector in the background technology;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the installation structure of this utility model;

[0022] Reference numerals: 1-First busbar; 101-Stationary contact of the first busbar disconnector; 2-Second busbar; 201-Stationary contact of the second busbar disconnector; 3-First four-way housing; 301-Current transformer connection terminal; 4-Second four-way housing; 401-Grounding switch connection terminal; 402-Four-way housing body; 403-Horizontal connecting cylinder; 5-First basin-type insulator; 6-Second basin-type insulator; 7-Third basin-type insulator; 8-First electrical connection base; 9-First conductive connector; 10-First cross electrical connector; 11-Second electrical connection base; 12-Second conductive connector; 13-Second cross electrical connector; 14-Stationary contact of the grounding switch; 15-Original first basin-type insulator; 16-Original second basin-type insulator; 17-Original conductive connector; 18-Original electrical connection base; 19-Operating mechanism of the first busbar disconnector; 20-Operating mechanism of the second busbar disconnector; 21-Current transformer; 22-Grounding switch operating mechanism. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 2 and 3 The present invention will be further illustrated by the embodiments.

[0024] The double busbar disconnector for GIS expansion includes a first four-way housing 3 and a second four-way housing 4 disposed on one side of the first four-way housing 3; both the first four-way housing 3 and the second four-way housing 4 are arranged vertically; a first basin-type insulator 5 with a protrusion located inside the first four-way housing 3 is connected between the left interface of the first four-way housing 3 and the right interface of the second four-way housing 4; a second basin-type insulator 6 with a protrusion located outside the first four-way housing 3 is installed at the right interface of the first four-way housing 3 and serves as a current transformer connection terminal 301; a third basin-type insulator 7 with a protrusion located inside the second four-way housing 4 is installed at the left interface of the second four-way housing 4 and serves as a grounding switch connection terminal 401;

[0025] The upper interface of the first four-way housing 3 serves as the connection interface for the operating mechanism of the first bus disconnect switch, and the lower interface of the first four-way housing 3 serves as the first bus interface; the upper interface of the second four-way housing 4 serves as the connection interface for the operating mechanism of the second bus disconnect switch, and the lower interface of the second four-way housing 4 serves as the second bus interface.

[0026] The first four-way housing 3 is provided with a first electrical connector 8, a first conductive connector 9, and a first cross-shaped electrical connector 10. The first cross-shaped electrical connector 10 has four connection ends, and the four connection ends of the first cross-shaped electrical connector 10 correspond one-to-one with the four interfaces of the first four-way housing 3. The second four-way housing 4 is provided with a second electrical connector 11, a second conductive connector 12, and a second cross-shaped electrical connector 13. The second cross-shaped electrical connector 13 has four connection ends, and the four connection ends of the second cross-shaped electrical connector 13 correspond one-to-one with the four interfaces of the second four-way housing 4. A grounding switch stationary contact 14 is provided outside the second four-way housing 4.

[0027] The second basin-type insulator 6, the first electrical connector 8, the first conductive connector 9, the first cross electrical connector 10, the first basin-type insulator 5, the second electrical connector 11, the second conductive connector 12, the second cross electrical connector 13, the third basin-type insulator 7, and the grounding switch stationary contact 14 are connected in pairs along the direction L from the current transformer connection end 301 to the grounding switch connection end 401.

[0028] The current transformer connection terminal 301 is used to connect the current transformer 21. The grounding switch connection terminal 401 is used to connect the grounding switch operating mechanism 22.

[0029] The first cross-shaped electrical connector 10 and the second cross-shaped electrical connector 13 both have four connection ends: top, bottom, left, and right.

[0030] The upper connection end of the first cross-shaped electrical connector 10 corresponds to the upper interface of the first four-way housing 3. The upper interface of the first four-way housing 3 is connected to the housing of the first busbar disconnector operating mechanism 19. The internal components of the first busbar disconnector operating mechanism 19 are connected to the upper connection end of the first cross-shaped electrical connector 10 via a first vertical connecting rod. The lower connection end of the first cross-shaped electrical connector 10 corresponds to the lower interface of the first four-way housing 3. The lower interface of the first four-way housing 3 is connected to the straight cylindrical body on the housing of the first busbar 1. The stationary contact 101 of the first busbar disconnector on the first busbar 1 is located below the lower connection end of the first cross-shaped electrical connector 10 and has a gap.

[0031] The upper connection end of the second cross-shaped electrical connector 13 corresponds to the upper interface of the second four-way housing 4. The upper interface of the second four-way housing 4 is connected to the housing of the second busbar disconnector operating mechanism 20. The internal components of the second busbar disconnector operating mechanism 20 are connected to the upper connection end of the second cross-shaped electrical connector 13 via the second vertical connecting rod. The lower connection end of the second cross-shaped electrical connector 13 corresponds to the lower interface of the second four-way housing 4. The lower interface of the second four-way housing 4 is connected to the straight cylindrical body on the housing of the second busbar 2. The stationary contact 201 of the second busbar disconnector on the second busbar 2 is located below the lower connection end of the second cross-shaped electrical connector 13 and has a gap.

[0032] When expanding a GIS, the following steps should be taken:

[0033] S1, de-energize the first busbar 1 for 6 days, and install the first four-way housing 3, the second basin-type insulator 6, the first electrical connection seat 8, the first conductive connector 9, the first cross electrical connector 10, the first basin-type insulator 5, the second electrical connection seat 11, and the first busbar disconnector operating mechanism 19 in sequence.

[0034] S2, after installing the current transformer 21 at the current transformer connection terminal 301, install the circuit breaker, outgoing isolation and grounding switch, and outgoing bushing.

[0035] S3, keep the first busbar 1 de-energized, and then de-energize the second busbar 2 for 6 days. That is to say, the first busbar 1 and the second busbar 2 are de-energized for 6 days at the same time. Then install the second four-way housing 4, the second conductive connector 12, the second cross electrical connector 13, the third basin-type insulator 7, and the grounding switch stationary contact 14 in sequence.

[0036] S4, install the second busbar disconnector operating mechanism 20 and the grounding switch operating mechanism 22.

[0037] It can reduce the time when the first busbar 1 and the second busbar 2 are simultaneously out of power, thereby reducing the load loss of the power grid.

[0038] To ensure electrical safety, preferably, the second four-way housing 4 includes a four-way housing body 402 and a horizontal connecting cylinder 403 connected to each other; the four-way housing body 402 is vertically arranged, and the horizontal connecting cylinder 403 is located between the four-way housing body 402 and the first basin-type insulator 5; the left interface of the horizontal connecting cylinder 403 is connected to the right interface of the four-way housing body 402, and the right interface of the horizontal connecting cylinder 403, the first basin-type insulator 5, and the left interface of the first four-way housing 3 are connected; the third basin-type insulator 7 is connected to the left interface of the four-way housing body 402 and serves as the grounding switch connection terminal 401; the protrusion of the third basin-type insulator 7 and the second cross-shaped electrical connector 13 are located in the four-way housing body 402; the four connecting ends of the second cross-shaped electrical connector 13 correspond one-to-one with the four interfaces of the four-way housing body 402. The left interface of the horizontal connecting cylinder 403 is connected to the right interface of the four-way housing body 402 by bolts. The right interface of the horizontal connecting cylinder 403, the left interface of the first basin-type insulator 5, and the left interface of the first four-way housing 3 are connected by bolts. The third basin-type insulator 7 is connected to the left interface of the four-way housing body 402 by bolts.

[0039] Preferably, the first conductive connector 9 is a horizontal conductive tube.

[0040] Preferably, the second conductive connector 12 is a horizontal conductive rod.

[0041] Preferably, both the first four-way housing 3 and the second four-way housing 4 are made of hard metal.

[0042] The first four-way housing 3 and the second four-way housing 4 can be made of stainless steel. As a further preferred option, both the first four-way housing 3 and the second four-way housing 4 are made of aluminum alloy.

[0043] Preferably, the first conductive connector 9 and the second conductive connector 12 are both hard conductive metal products.

[0044] The first conductive connector 9 and the second conductive connector 12 can be made of copper. As a further preferred embodiment, both the first conductive connector 9 and the second conductive connector 12 are made of aluminum alloy.

[0045] The specific embodiments described are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. All equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A double busbar disconnector for GIS expansion, characterized in that: The system includes a first four-way housing (3) and a second four-way housing (4) disposed on one side of the first four-way housing (3); both the first four-way housing (3) and the second four-way housing (4) are arranged vertically; a first basin-type insulator (5) with a protrusion located inside the first four-way housing (3) is connected between the left interface of the first four-way housing (3) and the right interface of the second four-way housing (4); a second basin-type insulator (6) with a protrusion located outside the first four-way housing (3) is installed at the right interface of the first four-way housing (3) and serves as a current transformer connection terminal (301); a third basin-type insulator (7) with a protrusion located inside the second four-way housing (4) is installed at the left interface of the second four-way housing (4) and serves as a grounding switch connection terminal (401). The upper interface of the first four-way housing (3) serves as the connection interface of the first bus disconnect switch operating mechanism, and the lower interface of the first four-way housing (3) serves as the first bus interface; the upper interface of the second four-way housing (4) serves as the connection interface of the second bus disconnect switch operating mechanism, and the lower interface of the second four-way housing (4) serves as the second bus interface. The first four-way housing (3) is provided with a first electrical connector (8), a first conductive connector (9) and a first cross-shaped electrical connector (10). The first cross-shaped electrical connector (10) has four connection ends, and the four connection ends of the first cross-shaped electrical connector (10) correspond one-to-one with the four interfaces of the first four-way housing (3). The second four-way housing (4) is provided with a second electrical connector (11), a second conductive connector (12) and a second cross-shaped electrical connector (13). The second cross-shaped electrical connector (13) has four connection ends, and the four connection ends of the second cross-shaped electrical connector (13) correspond one-to-one with the four interfaces of the second four-way housing (4). A grounding switch stationary contact (14) is provided outside the second four-way housing (4). The second basin-type insulator (6), the first electrical connector (8), the first conductive connector (9), the first cross electrical connector (10), the first basin-type insulator (5), the second electrical connector (11), the second conductive connector (12), the second cross electrical connector (13), the third basin-type insulator (7), and the grounding switch stationary contact (14) are connected in pairs along the direction L from the current transformer connection end (301) to the grounding switch connection end (401).

2. The double busbar disconnector for GIS expansion as described in claim 1, characterized in that: The second four-way housing (4) includes a four-way housing body (402) and a horizontal connecting cylinder (403) connected to each other; the four-way housing body (402) is arranged vertically, and the horizontal connecting cylinder (403) is located between the four-way housing body (402) and the first basin-type insulator (5); The left interface of the horizontal connecting cylinder (403) is connected to the right interface of the four-way housing body (402). The right interface of the horizontal connecting cylinder (403), the first basin-type insulator (5), and the left interface of the first four-way housing (3) are connected. The third basin-type insulator (7) is connected to the left interface of the four-way housing body (402) and serves as the grounding switch connection terminal (401). The protrusion of the third basin-type insulator (7) and the second cross electrical connector (13) are located in the four-way housing body (402). The four connection ends of the second cross electrical connector (13) correspond one-to-one with the four interfaces of the four-way housing body (402).

3. The double busbar disconnector for GIS expansion as described in claim 1 or 2, characterized in that: The first conductive connector (9) is a horizontal conductive tube.

4. The double busbar disconnector for GIS expansion as described in claim 1 or 2, characterized in that: The second conductive connector (12) is a horizontal conductive rod.

5. The double busbar disconnector for GIS expansion as described in claim 1, characterized in that: Both the first four-way housing (3) and the second four-way housing (4) are made of hard metal.

6. The double busbar disconnector for GIS expansion as described in claim 5, characterized in that: Both the first four-way housing (3) and the second four-way housing (4) are made of aluminum alloy.

7. The double busbar disconnector for GIS expansion as described in claim 1, characterized in that: Both the first conductive connector (9) and the second conductive connector (12) are hard conductive metal products.

8. The double busbar disconnector for GIS expansion as described in claim 7, characterized in that: Both the first conductive connector (9) and the second conductive connector (12) are made of aluminum alloy.

Images