220 kV bus lengthened type single-row GIS equipment

Abstract

The invention relates to a transformer substation combined electric appliance power distribution device, and particularly relates to a 220 kV bus lengthened type single-row GIS equipment. The 220 kV bus lengthened type single-row GIS equipment is structurally characterized in that the line-side voltage transformers of two groups of buses are upwardly arranged above a line-side outgoing branch bus.The group B of buses is arranged below the line-side voltage transformer of its own group and the line-side voltage transformer of the group A of buses. Between the current transformer of the group Bof buses and the circuit breaker of the group B of buses, a long sleeve internally provided with a branch bus is arranged to connect the current transformer with the circuit breaker. The group A of buses is arranged to be tightly attached to the circuit breaker of the group A of buses. The group A of buses and the line outgoing equipment of the group B of buses are located in the lower space of the long sleeve connected between the current transformer of the group B of buses and the circuit breaker of the group B of buses. In this way, the group A of buses is equal to the group B of buses inlength. The group A of buses and the group B of buses are parallel and are in the lower-order arrangement of the same plane. The 220 kV bus lengthened type single-row GIS equipment is simple and convenient in construction, and the overall layout of the power distribution device is not changed at all. Meanwhile, the double-layer wire outlet is not needed and the construction cost is effectively reduced. The line wiring is clear and simple, and the operation reliability is improved. Meanwhile, the operation and maintenance difficulty is reduced.

Description

technical field [0001] The invention relates to a substation combined electric power distribution device, in particular to a 220kV bus lengthened single-row arrangement GIS equipment. Background technique [0002] In the electrical field, GIS (Gas Insulated Substation) is the abbreviation of the English name of a gas-insulated substation, which refers to an equipment assembly that uses sulfur hexafluoride (SF6) gas as the insulating medium to combine multiple equipment and group busbars, namely SF6 fully enclosed combined electrical appliances. It combines the primary equipment in a substation except the transformer, including circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, lightning arresters, busbars, cable terminals, inlet and outlet bushings, etc. A whole. [0003] In the standard design, when the number of incoming and outgoing circuits is greater than or equal to 15 or required by the system, double-busbar double-secti...

AI Technical Summary

Problems solved by technology

[0005] 1. Adopt the cable crossing scheme: since the lines with the same name are generally arranged in adjacent intervals (see attached figure 1 And attached image 3 , such as Quanzhou I and Quanzhou II), often can only be connected to the same group of busbars, so it is necessary to connect the cables from another group of busbars in terms of layout, resulting in cable crossing. Considering the safety issues between cables, it is necessary to pull Large power distribution size, so this solution will cause problems such as increasing land use and increasing costs, and the construction is complicated, and the reliability of line operation may be reduced

[0006] 2. Two sets of busbars are arranged side by side directly, such as the technical solutions described in Chinese patents CN201120492033 and CN201610888753. The two sets of busbars are directly arranged side by side according to the equipment, which can be regarded as rotating the III / IVM busbar by 180 degrees, and then connecting with I / IIM The busbars are arranged in parallel, and the problems are: 1) Since the length of the busbars remains unchanged, the width of each interval remains unchanged, so although the length of the entire power distribution device area is reduced, the width is increased more; 2) Because the length of the busbars No change, most lines need to be arranged in double rows accordingly: in order to realize the arrangement of lines with the same name on different busbars, or the lines with the same name need to be distributed outside the two sets of busbars, and the lines with the same name should be elevated to achieve the same direction. Can refer to CN201120492033 attached figure 2 1A and 1B in and image 3 Elevated outgoing lines 9 and 10), or adopt double-layer GIS, such as the technical solution described in CN201610888753, both of which need to set up a double-layer outgoing line structure, so not only greatly changes the overall layout of the power distribution device, but also increases construction Layout workload and structure cost

Images