CN102255250A - High-voltage distribution device for alternating current filter field - Google Patents

Abstract

A high-voltage power distribution device for an AC filter field, which mainly includes: an AC filter group, a busbar composed of a low-level jumper and a high-level jumper, a large-group bus arrester, a large-group bus independent grounding device, and a large-group bus Auxiliary facilities such as voltage transformers, GIL pipeline busbars, frameworks, maintenance roads, etc., the AC filter group forms a large group of AC filters through a busbar composed of two sets of parallel low-level jumpers and a set of high-level jumper lines, and is connected to the GIS In the string; the isolating switch of the AC filter group adopts a single-column vertical open type, that is, an in-line arrangement; the busbar is arranged above the equipment in the fence; it can further reduce the floor area and investment Features.

Description

A high-voltage power distribution device for an AC filter field

technical field

The invention relates to a high-voltage power distribution device, in particular to a high-voltage power distribution device for an AC filter field in a converter station, and belongs to the technical field of electric power distribution.

Background technique

The AC filter is a special equipment of the converter station. Due to the large reactive power compensation capacity and the large number of AC filters and shunt capacitor banks, the area generally occupies about 30% of the total area within the enclosure wall of the station. The ±500kV converter station is generally equipped with 3 groups and 9 groups, and the ±800kV converter station is generally configured with 4 to 5 groups and 14 to 20 groups. The AC filter field accounts for about 30% of the entire UHV converter station site. The optimization of the layout of the AC filter field directly affects the layout of the general plane of the converter station. Optimizing the AC filter field will help reduce the total area of the entire converter station. Land and total investment are of great significance.

The AC filters in each group are respectively connected to an independent filter single busbar to form a large group of AC filters, and each large group is connected to the AC 3/2 circuit breaker wiring string as an electrical component.

The plane layout of the AC filter field consists of the area inside the fence of the AC filter group and the area outside the fence. The area inside the fence is mainly determined by the capacity of the AC filter group and the characteristic parameters of the filter, and the adjustable margin is not large; the outer size of the fence mainly refers to the area between the fence of the AC filter group and the isolation switch, according to the existing The layout type, the area outside the fence accounts for about 2/3 of the total area of the AC filter field, which is the decisive factor to control the area of the AC filter field. Therefore, to rationally optimize the layout of the AC filter field, the first thing is to optimize the layout of the area outside the fence of the AC filter field.

At present, the high-voltage power distribution devices in the AC filter field of the converter station mainly include the following two types, and their layout forms and characteristics:

The first type is "one" shape, referring to accompanying drawing 1, and its characteristic is that each parallel filter group in the large filter group is arranged on the same side of the large group busbar. Each large filter group needs to be connected to the bottom of the large group bus 1 through the GIL pipeline bus 10, and each filter group needs a section of the bus 1 to connect to the large filter group; only a single-column vertical isolating switch is arranged under the bus ( Cross arrangement) 6, the large group of bus surge arresters 7 and the large group of independent grounding devices 8 are arranged directly under the confluence bus frame; there are ring roads in front of the fences of each group.

The second type is "Tian" shape, referring to Fig. 2, which is characterized in that the four AC filter groups in the large group of AC filters are arranged face to face on both sides of the busbar 1 of the large group. Each large group of filters needs to be connected to the bottom of the large group of busbars through the GIL pipeline bus. Every two filter groups share a span of the busbar to connect to the large group of filters. Compared with the "one" shape layout, it saves half the size. The occupied area of the group busbar; since the filter groups on both sides must be connected from the busbar 1, only the post insulator and the large group of voltage transformers are arranged under the busbar 1, and the group isolating switch can only use double-column horizontal isolating switch 5 , to a certain extent increased the land occupation. In addition, in the "Tian"-shaped arrangement, half of the large group of GIL pipeline busbars 10 needs to be extended into the center of the filter field, and the investment for GIL pipeline busbars needs to be increased. There is a circular road in front of the fence of each group.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a high-voltage power distribution device for an AC filter field that can further reduce floor space and investment.

The technical solution of the present invention is: it mainly includes: the AC filter group, the confluence bus composed of the low-level jumper and the high-level jumper, a large group of bus surge arresters, a large group of bus independent grounding devices, a large group of bus voltage transformers, GIL pipeline busbar and auxiliary facilities such as structure and maintenance road. The AC filter group is connected to the GIS string through a confluence busbar composed of two sets of parallel low-level crossover lines and a set of high-level crossover lines.

The isolating switch of the AC filter group adopts a single-column vertical opening type, that is, an in-line arrangement.

The bus bar is arranged above the equipment in the enclosure.

The road auxiliary facilities are composed of partial alternate roads.

In the present invention, the AC filter group is connected to the GIS string to form a large group of AC filters through a busbar composed of two sets of parallel low-level cross-over lines and a set of high-level cross-over lines. The core idea is to arrange the busbars in the enclosure equipment Above, the area occupied by the AC filter field is greatly reduced. It has the characteristics of further reducing the occupied area and reducing investment.

Description of drawings

Accompanying drawing 1 is the layout diagram of the "one" shape arrangement of the AC filter field in the prior art.

Accompanying drawing 2 is the layout diagram of the "Tian" shape arrangement of the AC filter field in the prior art.

Accompanying drawing 3 is the layout diagram of the power distribution device of the AC filter field in the embodiment of the present invention.

Accompanying drawing 4 is the sectional view of the power distribution device of the AC filter field in the embodiment of the present invention.

The labels shown in the figure are: busbar 1, low-level jumper 2, high-level jumper 3, single-column vertical isolating switch 4 (inline layout), double-column horizontal isolating switch 5, single-column vertical isolating switch 6 (crossover Arrangement), large group bus surge arrester 7, large group bus independent grounding device 8, interphase road 9, GIL pipeline bus 10, fence 11, equipment in the fence 12, circuit breaker 13.

Detailed ways

The present invention will be described in detail below in conjunction with accompanying drawing: As shown in Fig. 3, 4, the present invention mainly comprises: AC filter group, busbar 1 that is made up of low-level jumper 2 and high-level jumper 3, large group bus arrester 7. Independent grounding device 8 for large group of busbars, large group of busbar voltage transformers, GIL pipeline busbar 10 and auxiliary facilities such as framework and maintenance roads. The busbar 1 composed of lines 3 forms a large group of AC filters and is connected to the GIS string.

The isolating switch 4 of the AC filter group adopts a single-column vertical opening type, that is, an in-line arrangement.

The busbar 1 is arranged above the equipment 12 in the enclosure.

The large groups of AC filters described in the present invention are all connected to the GIS string by using high-level jumper lines 3, which changes the situation in the prior art that the large groups of AC filters are mainly connected with the GIL pipeline busbar 10, and greatly reduces the length of the GIL pipeline busbar. Thereby greatly reducing investment.

The isolating switch of the AC filter group adopts a single-column vertical opening type (inline arrangement) 4, and the area between the fence 11 and the isolating switch has reached the minimum. Combined with the relative position of the fence 11 and the ring road, a local phase-to-phase Road 9 is used to meet the operation, inspection and maintenance requirements of the filtering group, and the special maintenance road in front of the fence is cancelled.

Considering the impact of noise comprehensively, the present invention arranges the main noise source in the AC filter area, the AC filter capacitor bank and the reactor in the equipment in the fence away from the fence, and the minimum distance between the noise source and the fence is increased from 20m arranged in the shape of a "field" It is about 30m away from the arrangement type provided by the present invention, which is beneficial to control the noise at the factory boundary.

Claims (4)

1. A high-voltage power distribution device for an AC filter field, which mainly includes: an AC filter group, a busbar composed of a low-level jumper and a high-level jumper, a large group of bus surge arresters, a large group of bus independent grounding devices, large Group busbar voltage transformer, GIL pipeline busbar and frame, and road auxiliary facilities, characterized in that the AC filter group is composed of two sets of parallel low-level jumpers (2) and a set of high-level jumper lines (3) to form a busbar ( 1) Form a large group of AC filters and connect them to the GIS string. 2. The high-voltage power distribution device of the AC filter field according to claim 1, characterized in that the isolating switch (4) of the AC filter group adopts a single-column vertical opening type, that is, an in-line arrangement. 3. The high-voltage power distribution device of an AC filter field according to claim 1, characterized in that the busbar (1) is arranged above the equipment (12) in the enclosure. 4. The high-voltage power distribution device of the AC filter field according to claim 1, characterized in that the road auxiliary facilities are composed of local alternate roads (9).

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