CN207302961U - 500KV vacuum circuit breaker topological structures - Google Patents

Abstract

The utility model relates to a topology structure of a 500KV vacuum circuit breaker, comprising: an 80kV vacuum circuit breaker module (1) based on a double-fracture solid-sealed pole (104) and a 500kV vacuum circuit breaker; The 80kV vacuum circuit breaker module (1) of (104) consists of two 40.5kV vacuum interrupters connected in series; the 500kV vacuum circuit breaker consists of six 80kV vacuum circuit breaker modules (1) connected in series and equalized . The utility model 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 utility model relates to a circuit breaker, in particular to a topological structure of a 500KV vacuum circuit breaker.

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 utility model is to provide a 500KV vacuum circuit breaker topology structure, realize 500kV capacitive vacuum breaking without re-ignition, and effectively solve the problem of 500kV and 1100kV switching filters on the AC side of the UHV DC converter station. The problems of insufficient breaking capacity, reignition and short electrical life of the switch.

The technical solution adopted by the utility model to solve its technical problems 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 whose fracture is solid-sealed to the pole is composed of two 40.5kV vacuum interrupters 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 topology structure of the 500KV vacuum circuit breaker of the utility model 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 utility model 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 utility model 500KV vacuum circuit breaker;

Fig. 2 is the unit topological diagram of the utility model 500kV vacuum circuit breaker;

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

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is described in detail with reference to the accompanying drawings.

As shown in Fig. 1-3, the topology structure of the 500kV vacuum circuit breaker of the present invention includes: 80kV vacuum circuit breaker module 1 based on double fracture solid-sealed pole 104 and 500kV vacuum circuit breaker based on 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 equalizing capacitor 103 are connected to form a common node, and the upper ends of the second vacuum interrupter 102 and the 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 outward, 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 utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than restrictive. Under the enlightenment of the utility model, personnel can also make many forms without departing from the scope of protection of the purpose of the utility model and claims, and these all belong to the protection of the utility model.

Claims (8)

1. A 500KV vacuum circuit breaker topology, characterized in that it comprises: an 80kV vacuum circuit breaker module (1) and a 500kV vacuum circuit breaker based on double-fracture solid-sealed poles (104); The 80kV vacuum circuit breaker module (1) of the pole (104) is composed of two 40.5kV vacuum interrupters in series; the 500kV vacuum circuit breaker is composed of six 80kV vacuum circuit breaker modules (1) connected in series and equalized made. 2. The topological structure of the 500kV vacuum circuit breaker according to claim 1, characterized in that the 500kV vacuum circuit breaker has three sets of independent operating mechanisms and three insulating pillars (2). 3. The topological structure of 500KV vacuum circuit breaker according to claim 1, characterized in that two 40.5kV vacuum interrupters are connected in parallel via voltage equalizing capacitors (103), and the head and tail are connected by flexible connecting wires (108). A vacuum interrupter (101) is connected to the lower end of the voltage equalizing capacitor (103) to form a common node, and the second vacuum interrupter (102) is connected to the upper end of the voltage equalizing capacitor (103) to form a common node. 4. The topological structure of the 500KV vacuum circuit breaker according to claim 3, characterized in that, the upper ends of the first vacuum interrupter (101) and the voltage equalizing capacitor (103) are connected to form a common node, and are drawn out to form a double fracture seal The upper outgoing line (106) of the pole (104), the second vacuum interrupter (102) and the lower end of the equalizing capacitor (103) are connected to form a common node, and the lower outgoing line of the double-break solid-sealed pole (104) is formed outwardly (107). 5. The topological structure of 500KV vacuum circuit breaker according to claim 3, characterized in that, the first vacuum interrupter (101) and the lower end of the voltage equalizing capacitor (103), the second vacuum interrupter (102) and the voltage equalization The lower end of the capacitor (103) is fixed together by an insulating pull rod (105). 6. The topological structure of 500kV vacuum circuit breaker according to claim 1, characterized in that two 80kV vacuum circuit breaker modules (1) form a unit of 500kV vacuum circuit breaker after being connected in series and external pressure equalization, and two 80kV vacuum circuit breakers The lower outgoing line (107) of the vacuum circuit breaker module (1) is connected by a connecting wire, and an external voltage equalizing capacitor (3 ), the interfaces of the insulating pull rods (105) of the two 80kV vacuum circuit breaker modules (1) are jointly connected with an insulating support (2). 7. The topological structure of 500kV vacuum circuit breaker according to claim 6, characterized in that 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. 8. The topological structure of 500KV vacuum circuit breaker according to claim 6, characterized in that six 80kV vacuum circuit breaker modules (1) are arranged horizontally, and one unit is equipped with an independent operating mechanism installed on the insulation Inside the pillars (2), each operating mechanism pulls two 80kV vacuum circuit breaker modules (1), and the 500kV vacuum circuit breaker consists of three ground-insulating pillars (2).