CN214506557U

CN214506557U - Alternating current filter bank arrangement system

Info

Publication number: CN214506557U
Application number: CN202120300775.6U
Authority: CN
Inventors: 冯川; 张映桢; 朱大鹏; 吴怡敏; 胡晓; 李龙才; 邢毅; 丁晓飞; 曾捷; 牟婷婷; 樊艳; 李珊珊; 谈东林; 魏晓斌; 骆玲; 唐浩龙; 张朝煜
Original assignee: Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
Current assignee: Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-10-26
Anticipated expiration: 2031-02-02

Abstract

The utility model discloses an alternating current filter bank arrangement system, which comprises a resistor, a capacitor, a grounding switch and a reactor; the lower wiring terminal of the resistor is connected with the capacitor through the lower wiring terminal of the reactor, and the upper wiring terminal of the resistor is connected with the grounding switch through the upper wiring terminal of the reactor; the utility model discloses area can be reduced, engineering cost is saved.

Description

Alternating current filter bank arrangement system

Technical Field

The utility model relates to an alternating current filter bank arrangement system.

Background

China is one of the most serious countries in the world with ice coating of power transmission lines, and with the rapid development of power grids, high-voltage and ultrahigh-voltage power transmission lines crossing ice coating areas are more and more, and the possibility of power grid disaster caused by extreme weather disasters is higher and more. Particularly, with the global warming and the construction of extra-high voltage transmission projects, the ice-coating range of the transmission line caused by freezing rain in winter is wider and wider, the possibility of large-area ice coating of the transmission line in winter is higher and higher, and the ice coating of the transmission line leads to the galloping accident of the ice-coated lead, the ice flashover accident of an insulator, the large tension of the lead and even the dangers of wire breakage, tower collapse and the like.

In 2008, 1-2 months, the low-temperature rain, snow and ice weather attacks the southern, Chinese and eastern China in a large area, so that the transmission lines in Guizhou, Hunan, Guangdong, Yunnan, Guangxi, Jiangxi and other provinces stop running for a large area and a long time, and huge losses are caused to national economy and people's life.

In order to build a safe power grid for people, domestic electric power enterprises and scientific research units actively start the research of a power grid ice melting technology while taking emergency measures to cope with the large-scale ice coating disaster. After many years of efforts, the research and development of the power grid ice melting technology have made breakthrough, and at present, hundreds of substations and converter stations are provided with direct-current ice melting devices. The line direct-current deicing technology has become a main means for coping with icing disasters of high-voltage and ultrahigh-voltage power transmission lines of power grids in China and southwest at present.

At present, a thyristor converter valve is mostly adopted in direct-current ice melting devices installed in domestic transformer substations and converter stations, due to the switching characteristics of thyristors, a large amount of harmonic waves are generated when a valve bank is put into operation, the harmonic overvoltage generated when electrical equipment operates due to the overlarge harmonic waves can possibly cause the equipment to be damaged, meanwhile, the harmonic waves can generate interference on communication equipment, and a special type 35kV alternating-current filter bank needs to be configured to filter the harmonic waves of the ice melting device. However, the arrangement scheme of the alternating current filter bank generally has the problems of large floor area, high engineering cost and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide an exchange filter bank arrangement system, reduced area effectively, saved engineering cost.

The utility model aims at realizing through the following scheme:

an alternating current filter bank arrangement system includes a resistor, a capacitor, a ground switch, and a reactor; the lower wiring terminal of the resistor is connected with the capacitor through the lower wiring terminal of the reactor, and the upper wiring terminal of the resistor is connected with the grounding switch through the upper wiring terminal of the reactor.

Further, a current transformer is included, and the current transformer is connected with the capacitor.

Further, the reactor includes a multiphase reactor.

Further, a flexible wire is included, each of the upper terminals of the multiphase reactor is connected in series with the flexible wire, and the flexible wire is connected with the grounding switch.

Further, the multiphase reactor includes a three-phase reactor.

Further, a power distribution device is included, the power distribution device being connected to the capacitor.

The utility model has the advantages that:

the utility model effectively reduces the occupied area and saves the construction cost; specifically, the parallel connection of the reactor and the resistor is realized by using the connecting terminals of the reactor and the resistor: the lower terminal of the resistor is connected with the capacitor through the lower terminal of the reactor; the upper terminal of the resistor is connected with the grounding switch through the upper terminal of the reactor; through the wiring, the scheme that parallel connection wires of the reactor and the resistor can be realized by replacing a post insulator and an upper-layer pipe bus and a lower-layer pipe bus in a conventional arrangement scheme is replaced, and after the post insulator and the pipe bus are eliminated, the interphase distance of three-phase equipment can be compressed, so that the size of the 35kV alternating current filter bank in the width direction is correspondingly compressed.

Drawings

The drawings in the following description are only some embodiments of the invention, and other drawings can be obtained by those skilled in the art without inventive exercise.

Fig. 1 is a schematic structural diagram of a 35kV ac filter bank arrangement system according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of an embodiment of the present invention;

in the figure, 1-resistor, 2-post insulator, 3-capacitor, 4-current transformer, 5-post insulator, 6-grounding switch and 7-reactor.

Detailed Description

All of the features disclosed in all of the embodiments in this specification, or all of the steps in all of the methods or processes implicitly disclosed, may be combined or substituted in any way, except where mutually exclusive features and/or steps are present.

As shown in fig. 1 to 3, an ac filter bank arrangement system includes a resistor 1, a capacitor 3, a ground switch 6, and a reactor 7; the lower connection terminal of the resistor 1 is connected to the capacitor 3 through the lower connection terminal of the reactor 7, and the upper connection terminal of the resistor 1 is connected to the ground switch 6 through the upper connection terminal of the reactor 7.

Further, a current transformer 4 is included, said current transformer 4 being connected to the capacitor 3.

Further, the reactor 7 includes a multiphase reactor.

Further, a flexible wire is included, each upper terminal of the multiphase reactor is connected in series with the flexible wire, and the flexible wire is connected with the ground switch 6.

Further, the multiphase reactor includes a three-phase reactor.

Further, a power distribution device is included, which is connected to the capacitor 3.

The utility model discloses an in the embodiment, 35kV distribution device is chooseed for use to distribution device, and the three-phase reactor is selected to the reactor. According to the scheme of analyzing the conventional 35kV alternating current filter bank arrangement system, in order to realize parallel connection of the reactor and the resistor, a post insulator and upper and lower layer tube buses are required to be arranged in the conventional scheme; meanwhile, in order to prevent the heating condition of nearby iron components caused by the operation of the reactor, the post insulators and the tube buses are arranged outside the antimagnetic range of the reactor as much as possible, and the interphase distance of the three-phase equipment in the arrangement scheme is large, so that the size of the 35kV alternating current filter bank fence in the width direction is large.

As shown in fig. 1-3, the embodiment of the utility model provides an utilize the binding post of reactor, resistor ingeniously to realize the parallel connection line of reactor, resistor: 1) the lower terminal of the resistor is connected with the capacitor through the lower terminal of the reactor; 2) the upper terminal of the resistor is connected with the grounding switch through the upper terminal of the reactor; through the wiring, the parallel connection of the reactor and the resistor can be realized by canceling the post insulator and the upper and lower layer tube buses in the conventional arrangement scheme, and after the post insulator and the tube buses are cancelled, the interphase distance of three-phase equipment can be compressed, so that the size of the 35kV alternating current filter bank fence in the width direction is correspondingly compressed.

Meanwhile, the upper terminals of the three-phase reactors are connected in series by using the flexible wires and then are led out to the grounding switch from the flexible wires, compared with the conventional arrangement scheme, the three-phase bus post insulators and the tube bus can be saved, and the longitudinal size of the 35kV alternating current filter bank fence is correspondingly compressed.

The 35kV alternating current filter bank usually adopts a passive filter, and is composed of a capacitor, a reactor and a resistor which are used as basic elements in series and parallel connection. A conventional 35kV ac filter bank arrangement enclosure size is 18m x 14.5 m. The embodiment of the utility model provides an in the 35kV alternating current filter group arrangement system that proposes can compress the rail size to 13m 12.7m, as shown in fig. 1 ~ 3, has reduced area effectively, has saved engineering cost, accords with the national policy of saving the area of taking up an area.

In addition to the above examples, those skilled in the art can derive other embodiments from the above disclosure or utilize the knowledge or skill of the relevant art to modify and obtain other embodiments, and the features of the various embodiments can be interchanged or substituted, and such modifications and variations that may be made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the following claims.

Claims

1. An alternating current filter bank arrangement system, characterized by comprising a resistor (1), a capacitor (3), a grounding switch (6) and a reactor (7); the lower wiring terminal of the resistor (1) is connected with the capacitor (3) through the lower wiring terminal of the reactor (7), and the upper wiring terminal of the resistor (1) is connected with the grounding switch (6) through the upper wiring terminal of the reactor (7).

2. An alternating current filter bank arrangement according to claim 1, characterized by a current transformer (4), said current transformer (4) being connected to a capacitor (3).

3. An alternating current filter bank arrangement according to any of claims 1 or 2, characterized in that the reactor (7) comprises a polyphase reactor.

4. An ac filter bank arrangement according to claim 3, comprising a pigtail by means of which each upper terminal of the polyphase reactor is connected in series and which pigtail is connected to the earthing switch (6).

5. An ac filter bank arrangement according to claim 4, wherein the polyphase reactor comprises a three-phase reactor.

6. An AC filter bank arrangement as claimed in claim 5, comprising a power distribution device connected to the capacitor (3).