CN107331569A - 500KV vacuum circuit breaker topological structures - Google Patents

Abstract

The invention relates to a topology structure of a 500KV vacuum circuit breaker, comprising: an 80kV vacuum circuit breaker module (1) based on a double-break solid-sealed pole (104) and a 500kV vacuum circuit breaker; the double-break solid-sealed pole based on ( The 80kV vacuum circuit breaker module (1) of 104) is formed by connecting two 40.5kV vacuum interrupters in series; the 500kV vacuum circuit breaker is formed by connecting six 80kV vacuum circuit breaker modules (1) in series with voltage equalization. The invention can realize 500kV capacitive vacuum breaking without restrike, and effectively solves the problems of insufficient breaking capacity, restrike and short electrical life of the 500kV and 1100kV switching filter circuit breakers on the AC side of the UHV DC converter station.

Description

500KV vacuum circuit breaker topology

technical field

The present invention relates to circuit breakers, and more particularly, to a 500KV vacuum circuit breaker topology.

Background technique

The receiving ends of the ±800kV and ±1100kV UHV DC projects are connected to the 500kV/1000kV AC power grid in layers, and the filter bank circuit breakers on the 500kV and 1100kV sides adopt a column structure. my country has successfully developed 1100kV AC GIS floor tank circuit breakers, and successfully applied to many UHV projects, but no domestic and foreign manufacturers have successfully developed 500kV, 1100kV column vacuum circuit breakers, lack of experience for reference At the same time, considering the large range and frequency of UHV power grid power adjustment, the filter bank switching is more frequent, and the capacitive load switching capacity requirements are much higher than the C2 level specified in the standard, the demand for key technology research is very urgent.

Contents of the invention

The technical problem to be solved by the present invention is to provide a 500KV vacuum circuit breaker topology, realize 500kV capacitive vacuum breaking without restrike, and effectively solve the problem of 500kV and 1100kV switching filter circuit breakers on the AC side of UHV DC converter stations Problems of insufficient breaking capacity, reignition and short electrical life.

The technical solution adopted by the present invention to solve the technical problem is: to construct a 500KV vacuum circuit breaker topology, including: an 80kV vacuum circuit breaker module and a 500kV vacuum circuit breaker based on double-fracture solid-sealed poles; The 80kV vacuum circuit breaker module with solid-sealed poles is composed of two 40.5kV vacuum interrupters connected in series; the 500kV vacuum circuit breaker is composed of six 80kV vacuum circuit breaker modules connected in series and equalized.

In the above solution, the 500kV vacuum circuit breaker has three sets of independent operating mechanisms and three insulating pillars.

In the above scheme, the two 40.5kV vacuum interrupters are connected in parallel through voltage equalizing capacitors, and the head and tail are connected by flexible connecting wires. The first vacuum interrupter and the lower end of the voltage equalizing capacitor are connected to form a common node, and the second vacuum interrupter and The upper end of the equalizing capacitor is connected to form a common node.

In the above scheme, the first vacuum interrupter and the upper end of the voltage equalizing capacitor are connected to form a common node, and the upper outlets of the double-break solid-sealed pole are drawn outwards, and the second vacuum interrupter and the lower end of the voltage equalizing capacitor are connected to form a common node. Lead outwards to form the lower outlet of the double-break solid-sealed pole.

In the above solution, the first vacuum interrupter and the lower end of the voltage equalizing capacitor, the second vacuum interrupter and the lower end of the voltage equalizing capacitor are fixed together by insulating pull rods.

In the above scheme, two 80kV vacuum circuit breaker modules form a unit of 500kV vacuum circuit breaker through series connection and external pressure equalization. The lower outgoing lines of the two 80kV vacuum circuit breaker modules are connected by connecting wires. An external voltage equalizing capacitor is connected in parallel between the upper outgoing line of the module and the connecting wire, and the insulating rod interface of the two 80kV vacuum circuit breaker modules is connected to an insulating support.

In the above scheme, three units are connected in series to form a 500kV vacuum circuit breaker, and the outgoing lines of the three units are connected end to end.

In the above scheme, the six 80kV vacuum circuit breaker modules are arranged horizontally, and one unit is equipped with an independent operating mechanism installed in the insulating support. Each operating mechanism pulls two 80kV vacuum circuit breaker modules, 500kV The vacuum circuit breaker consists of three insulated pillars to the ground.

Implementing the 500KV vacuum circuit breaker topology of the present invention has the following beneficial effects:

1. The vacuum short gap of the 40.5kV vacuum interrupter has a high breaking gain characteristic, and the breaking capacity of multiple short gap fractures connected in series is significantly greater than that of a single fracture with the same total gap length.

2. Multiple fractures are disconnected in series, and each fracture shares the arc energy in the breaking process. The probability of breakdown of all fractures is greatly reduced, thereby improving the breaking capacity as a whole and solving the problem of restarting after breaking.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the topological diagram of the topological structure of the 500KV vacuum circuit breaker of the present invention;

Fig. 2 is a topological diagram of a 500kV vacuum circuit breaker unit of the present invention;

Figure 3 is a topological diagram of an 80kV vacuum circuit breaker module based on double-break solid-sealed poles.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figures 1-3, the topological structure of the 500kV vacuum circuit breaker of the present invention includes: the 80kV vacuum circuit breaker module 1 based on the double-break solid-sealed pole 104 and the 500kV vacuum circuit breaker based on the 80kV vacuum circuit breaker module 1.

The 80kV vacuum circuit breaker module 1 based on the double-break solid-sealed pole 104 is composed of two 40.5kV vacuum interrupters connected in series. The 500kV vacuum circuit breaker is composed of six 80kV vacuum circuit breaker modules 1 connected in series and equalized. The 500kV vacuum circuit breaker has three sets of independent operating mechanisms and three insulating pillars 2 .

The 80kV vacuum circuit breaker module 1 based on the double-break solid-sealed pole 104 is composed of two 40.5kV vacuum interrupters connected in parallel via a voltage equalizing capacitor 103, and then the head and the tail are connected by a flexible connecting wire 108. The lower ends of the first vacuum interrupter 101 and the voltage equalizing capacitor 103 are connected to form a common node, and the upper ends of the second vacuum interrupter 102 and the voltage equalizing capacitor 103 are connected to form a common node. The upper end of the first vacuum interrupter 101 and the voltage equalizing capacitor 103 are connected to form a common node, and the upper outgoing line 106 of the double-break solid-sealed pole 104 is drawn outwards, and the second vacuum interrupter 102 and the lower end of the equalizing capacitor 103 are connected to form a common node. The node leads outwards to form the lower outgoing line 107 of the double-break solidified pole 104 . The lower end of the first vacuum interrupter 101 and the voltage equalizing capacitor 103 , the second vacuum interrupter 102 and the lower end of the voltage equalizing capacitor 103 are fixed together by insulating pull rods 105 . The double-fracture solid-sealed pole 104 only has the upper outgoing line 106, the lower outgoing line 107 and the insulating pull rod 105 interface externally.

The 500kV vacuum circuit breaker is composed of two 80kV vacuum circuit breaker modules 1 through series connection and external voltage equalization to form a unit of the 500kV vacuum circuit breaker. The lower outgoing lines 107 of the two 80kV vacuum circuit breaker modules 1 are connected by connecting wires, and an external voltage equalizing capacitor 3 is connected in parallel between the upper outgoing lines 106 of the two 80kV vacuum circuit breaker modules 1 and the connecting wires. The interfaces of the insulating rods 105 of the two 80kV vacuum circuit breaker modules 1 are jointly connected with an insulating support 2 .

The three units of the 500kV vacuum circuit breaker are connected in series to form a 500kV vacuum circuit breaker, and the outgoing lines of the three units are connected end to end.

The 500kV vacuum circuit breaker consists of six 80kV vacuum circuit breaker modules 1 in a horizontal arrangement. One unit is equipped with an independent operating mechanism installed in the insulating support 2, and each operating mechanism pulls two 80kV vacuum circuit breaker modules. In group 1, the 500kV vacuum circuit breaker is composed of three insulated pillars 2 to the ground.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (8)

1. a kind of 500KV vacuum circuit breakers topological structure, it is characterised in that including：Based on double-fracture pole (104) 80kV vacuum circuit breakers module (1) and 500kV vacuum circuit breakers；The 80kV vacuum based on double-fracture pole (104) Breaker module (1) is in series by two 40.5kV vacuum interrupters；The 500kV vacuum circuit breakers are by six 80kV vacuum Breaker module (1) is connected and pressure is formed.

2. 500KV vacuum circuit breakers topological structure according to claim 1, it is characterised in that the 500kV vacuum circuit breakers Device has three sets of independent operating mechanisms and three insulation columns (2).

3. 500KV vacuum circuit breakers topological structure according to claim 1, it is characterised in that two 40.5kV vacuum are gone out Arc chamber passes through the wire that is flexible coupling (108) between head and the tail after equalizing capacitance (103) parallel connection and connected, the first vacuum interrupter (101) And equalizing capacitance (103) lower end connects to form public node, the second vacuum interrupter (102) and equalizing capacitance (103) upper end connect Connect to form public node.

4. 500KV vacuum circuit breakers topological structure according to claim 3, it is characterised in that the first vacuum interrupter (101) and equalizing capacitance (103) upper end connects to form public node, outwards draw and form the upper of double-fracture pole (104) Outlet (106), the second vacuum interrupter (102) and equalizing capacitance (103) lower end connect to form public node, outwards draw and are formed The lower outlet (107) of double-fracture pole (104).

5. 500KV vacuum circuit breakers topological structure according to claim 3, it is characterised in that the first vacuum interrupter (101) and equalizing capacitance (103) lower end, the second vacuum interrupter (102) and equalizing capacitance (103) lower end pass through insulated tension pole (105) it is fixed together.

6. 500KV vacuum circuit breakers topological structure according to claim 1, it is characterised in that two 80kV vacuum circuit breakers Device module (1) passes through a unit of formation 500kV vacuum circuit breakers after series connection and outside pressure, two 80kV vacuum circuit breakers The lower outlet (107) of module (1) is connected by connecting wire, the upper outlet (106) of two 80kV vacuum circuit breakers modules (1) with One in parallel outside equalizing capacitance (3), the insulated tension pole of two 80kV vacuum circuit breakers modules (1) are distinguished between connecting wire (105) interface is connected with an insulation column (2) jointly.

7. 500KV vacuum circuit breakers topological structure according to claim 6, it is characterised in that shape after three unit series connection Into 500kV vacuum circuit breakers, joined end to end between three unit outlets.

8. 500KV vacuum circuit breakers topological structure according to claim 6, it is characterised in that six 80kV vacuum circuit breakers Device module (1) takes a word horizontal arranging mode, and a unit configures an independent operating mechanism and is installed on insulation column (2) Interior, each operating mechanism pulls two 80kV vacuum circuit breakers modules (1), and 500kV vacuum circuit breakers are altogether by three insulation against ground Pillar (2) is constituted.