CN201402774Y

CN201402774Y - A Z-type multi-fracture modular high-voltage vacuum circuit breaker

Info

Publication number: CN201402774Y
Application number: CN2009203012221U
Authority: CN
Inventors: 邹积岩; 廖敏夫; 段雄英; 文化宾
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology; State Grid Electric Power Research Institute
Priority date: 2009-03-12
Filing date: 2009-03-12
Publication date: 2010-02-10
Anticipated expiration: 2019-03-12

Abstract

The utility model discloses a Z-shaped multi-fracture modular high-voltage vacuum circuit breaker, which belongs to the technical field of high-voltage switches. It is characterized in that the basic module of the high-voltage vacuum circuit breaker includes an outlet board, a vacuum interrupter, an operation box and an optical cable; multiple basic modules are connected in series in a Z-shape, and the module at the geometric center is fixed on the post insulator and fixed on the base through the base. On the ground, the modules on both sides are arranged horizontally; the operation boxes of each module are connected by optical cables, and there are no moving parts between modules or to the ground, and there is no electrical connection except for adjacent modules. The optical cables of each module form an optical signal path to receive the combination and separation control of the ground, and are operated synchronously within the module. The beneficial effect of the utility model is that a vacuum circuit breaker with a higher voltage level is realized by a plurality of series-connected modules, replacing the SF ₆ arc-extinguishing medium; a Z-type series structure is adopted for synchronous operation, the overall structure is simple and symmetrical, and there is no series transmission link, The operation is reliable, the service life is long, and it is not disturbed by the external environment, so it is convenient to realize.

Description

A kind of Z type multi-break modular high-pressure vacuum breaker

Technical field

The utility model is a kind of AC high voltage vacuum breaker, belongs to the high-voltage switch gear technical field, relates to a kind of Z type multi-break modular high-pressure vacuum breaker of the SF6 of replacement arc-extinguishing medium.

Background technology

Circuit breaker is the afterbody insulation blocking of short-circuit fault of power system; send the separating brake instruction when electric power system detects short trouble, can for the operating mechanism of circuit breaker; operating mechanism drives two electrode separation that are in closure state originally in the arc control device, makes system and Fault Isolation.At present, all adopt SF at 110kV and above electric pressure ₆The primary cut-out of arc-extinguishing medium is used vacuum circuit-breaker in the electric power system of medium voltate grade.Because short circuiting arc has pollution to the vacuum extinction room environmental before cut-offfing, so vacuum circuit-breaker is difficult to the voltage tolerance level that reaches high in actual applications.Generally believing reliable application at present in the world, is to use in the electric power system of 72.5kV and following electric pressure mostly.

SF ₆Circuit breaker has excellent arc quenching characteristic, but while SF ₆Also be typical greenhouse gas, can face in the near future and be completely forbidden the possibility of using.Research SF is all being made great efforts in the whole world ₆The alternative form of gas, the middle pressure vacuum interrupter composition circuit breaker of using series connection is most promising form.The type of attachment of multi-break will be considered numerous factors in the practical application, relates generally to electric field structure and mechanical structure, adopt independently light controlled vacuum switch module after, the multi-break high-pressure vacuum breaker is different fully with the conventional circuit breaker structure.

Utility model

The technical problems to be solved in the utility model provides a kind of multi-break modular high-pressure vacuum breaker structure, and it does not use SF ₆Arc-extinguishing medium, overall structure is simple, element is few, no tandem sequence link, and is reliable, the life-span is long, is not subjected to external interference, and it is convenient to realize.

In order to achieve the above object, the technical solution of the utility model is as follows: the basic module of this high-pressure vacuum breaker mainly is made up of outlet board, vacuum interrupter, control box and optical cable; A plurality of basic modules are connected in series by the Z type, the module that is in the geometric center position is fixed on the post insulator and by base and is fixed in ground, be in the geometric center position module and be arranged vertically, the both sides module level arranges that geometric center overlaps with post insulator and base.Between the control box of each module by optical cable contact, between the module, module do not have moving component over the ground, do not have the contact of electricity except that adjacent block.The optical cable formation photo-signal channel of each module is accepted the branch that closes on ground and is controlled, by inside modules simultaneous operation.

The beneficial effects of the utility model are to simplify the basic structure of primary cut-out, overcome the weakness of single vacuum interrupter operating voltage deficiency with the vacuum interrupter series system of advanced technology, realize the more vacuum circuit-breaker of voltage levels by the more module of series connection, replace a large amount of at present SF that greenhouse effect are arranged that use ₆Arc-extinguishing medium; Adopt the synchronous actuating of Z type cascaded structure, overall structure is simple, symmetrical, and no tandem sequence link is reliable, the life-span is long, is not subjected to external environmental interference, and industrial realization makes things convenient for.

Description of drawings

Fig. 1 is a high-pressure vacuum breaker basic module schematic diagram of the present utility model.

Fig. 2 is three module Z type tandem junction compositions of the present utility model.

Fig. 3 is the structural representation of four module series connection.

Fig. 4 is the structural representation of five module series connection.

Among the figure: 1 outlet board; 2 vacuum interrupters; 3 control boxs; 4 optical cables;

5 post insulators; 6 bases.

Embodiment

Be described in detail specific embodiment of the utility model below in conjunction with technical scheme and accompanying drawing.

As shown in Figure 1 and Figure 2, be basic module of the present utility model and Z type three fracture modular high-pressure vacuum breaker structural representations.This circuit breaker is a symmetrical structure, mainly forms basic module by outlet board 1, vacuum interrupter 2, control box 3, optical cable 4, and a plurality of modules are connected in series by the Z type and are fixed on the post insulator 5, and base 6 is used for the fixing of post insulator 5 and ground.Fig. 3, Fig. 4 are respectively four structural representations with five fracture modular high-pressure vacuum breakers.

The module that the utility model is in the geometric center position is arranged vertically, and is fixed on the post insulator and by base and is fixed in ground, and the both sides module weight equates, horizontal arrangement; Both sides module gravity basic neutralisation, the electric field structure symmetry, distributed capacitance is less over the ground; By optical cable contact, control the synchronous actuating in inside of each module between the control box of each module, between the module, module do not have the contact of moving component over the ground, do not have the contact of electricity except that adjacent block by light signal.

When electric power system detects short trouble, operating mechanism in the control box 3 of each module of circuit breaker obtains the separating brake instruction simultaneously, drive in the vacuum interrupter 2 and be in the moving contact of closure state originally to two end motions, rely on scattering nature, the electric arc of vacuum to extinguish and open circuit, make system and Fault Isolation at alternating current natural zero-crossing point.The operating voltage of N series connection arc control device is at least N times of single arc control device, therefore can form the primary cut-out of 110kV and above electric pressure.

Vacuum interrupter 2 rated voltages of typical case's application examples are 40.5kV; Three modules are composed in series the primary cut-out of 110kV electric pressure.

Claims

1. A Z-type multi-fracture modular high-voltage vacuum circuit breaker, characterized in that:

The basic module of the high-voltage vacuum circuit breaker includes an outlet plate (1), a vacuum interrupter (2), an operation box (3) and an optical cable (4);

A plurality of basic modules are connected in series in a Z-shape, and the modules at the geometric center are fixed on the post insulator (5) and fixed on the ground through the base (6); the optical cables (4) of each module form an optical signal path to receive the ground control. , operated synchronously within the module.

2. A Z-type multi-fracture modular high-voltage vacuum circuit breaker according to claim 1, further characterized in that: the modules at the geometric center are arranged vertically, the modules on both sides are arranged horizontally, and the geometric center is connected to the post insulator (5) and The base (6) overlaps.

3. A Z-type multi-fracture modular high-voltage vacuum circuit breaker according to claim 1, further characterized in that: the operation boxes (3) of each module are connected by optical cables (4), between modules, between modules The ground has no moving parts and no electrical connection other than adjacent modules.