CN203466436U

CN203466436U - Novel semi-closed combined electrical apparatus equipped with electronic voltage transformers

Info

Publication number: CN203466436U
Application number: CN201320461824.XU
Authority: CN
Inventors: 秦政敏; 李建征; 刘源; 陈平均; 张猛
Original assignee: Henan Pinggao Toshiba High Voltage Switchgear Co Ltd
Current assignee: Henan Pingzhi High Voltage Switchgear Co ltd
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-03-05
Anticipated expiration: 2023-07-31

Abstract

The utility model discloses a novel semi-closed combined electrical apparatus equipped with electronic voltage transformers, which comprises three groups of switch units and sleeves, wherein the first group of switch units is connected between the first sleeve and the second sleeve, the second group of switch units is connected between the second sleeve and the third sleeve, and the third group of switch units is connected with the third sleeve and the fourth sleeve. The novel semi-closed combined electrical apparatus further comprises two electronic voltage transformers, wherein the first electronic voltage transformer is arranged between the second sleeve and the second group of switch units, and the second electronic voltage transformer is arranged between the third sleeve and the second group of switch units. The novel semi-closed combined electrical apparatus disclosed by the utility model avoids a phenomenon of ferromagnetic resonance by using the electronic voltage transformers, is low in price, reduces the cost of a substation, and improves the economic benefits. The novel semi-closed combined electrical apparatus occupies small area, is compact in structure, and provides a solid foundation for intellectualization of the substation by using the electronic voltage transformers.

Description

A kind of novel semi-enclosed combined electrical apparatus that electronic type voltage transformer is housed

Technical field

The utility model relates to high-voltage switch gear field, relates in particular to a kind of novel semi-enclosed combined electrical apparatus that electronic type voltage transformer is housed for 55KV.

Background technology

Semi-enclosed combined electrical apparatus HGIS (Hybrid Gas insulated metal-enclosed Switchgear) is at the sulfur hexafluoride gas-insulating and fully-enclosed power distribution equipment of conventional GIS() a kind of novel electric equipment of development on basis, it is combined plurality of devices to form single-phase combined electrical apparatus, it utilizes outlet casing tube to be connected with open type (air insulation) main bus bar without main bus bar.HGIS is than the air-insulated ordinary distribution device of conventional AIS() compact conformation, with the price advantage of AIS and the space advantage of GIS.

In actual applications, user generally need to arrange mutual induction of voltage VT (Voltage Transformer) in high voltage switchgear, realizes the measurement of magnitude of voltage and route protection etc.GIS VT used mostly is electromagnetic type VT, and AIS VT used mostly is insulator type condenser type VT, and these two kinds of VT feature dimensions are all larger.So in HGIS, do not adopt electromagnetic type VT, but the VT of open type be installed to HGIS equipment to realize its function, lost the due advantage of HGIS.

Utility model content

The purpose of this utility model is to provide a kind of novel semi-enclosed combined electrical apparatus that electronic type voltage transformer is housed, compact conformation, easy to use, economical and practical.

The technical solution adopted in the utility model is:

A kind of novel semi-enclosed combined electrical apparatus that electronic type voltage transformer is housed, comprise three groups of switch elements and sleeve pipe, first group of switch element is connected between the first sleeve pipe and the second sleeve pipe, second group of switch element is connected between the second sleeve pipe and the 3rd sleeve pipe, the 3rd group of switch element is connected between the 3rd sleeve pipe and Quadruplet pipe, also comprise two electronic type voltage transformers, the first electronic type voltage transformer is located between the second sleeve pipe and second group of switch element, and the second electronic type voltage transformer is located between the 3rd sleeve pipe and second group of switch element.

The utility model utilizes electronic type voltage transformer, avoids ferro resonance phenomenon, and low price reduces transformer station's cost, increases economic efficiency; This plant area area is little, and compact conformation utilizes the intellectuality of electronic type voltage transformer ，Wei transformer station that solid foundation is provided.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is capacitor voltage divider circuit theory diagrams.

Embodiment

As shown in Figure 1, the utility model comprises three groups of switch elements and sleeve pipe, first group of switch element 1 is connected between the first sleeve pipe 4 and the second sleeve pipe 5, second group of switch element 2 is connected between the second sleeve pipe 5 and the 3rd sleeve pipe 6, the 3rd group of switch element 3 is connected between the 3rd sleeve pipe 6 and Quadruplet pipe 7, also comprise two electronic type voltage transformer EVT, the first electronic type voltage transformer EVT is located between the second sleeve pipe 5 and second group of switch element 2, and the second electronic type voltage transformer EVT is located between the 3rd sleeve pipe 6 and second group of switch element 2.

When semi-enclosed combined electrical apparatus normally moves, the fracture of circuit breaker is in "on" position, running current by conductor flow through electronic type voltage transformer EVT, the electric capacity ring that electronic type voltage transformer EVT installs by inside collects voltage signal, the principle of capacitance partial pressure of utilizing electric capacity ring realizes the novel voltage transformer of voltage measurement, and its capacitor voltage divider is comprised of high-voltage arm capacitor C 1 and low-voltage arm capacitor C 2./ C1 as shown in Figure 2: U2=U1C1/(C1+C2)=U1/K, voltage ratio K=(C1+C2).Voltage signal arrives backstage by optical cable transmission, for measuring electric energy etc.When breaking down; electronic type voltage transformer EVT can collect voltage alarm signal; and alarm signal is sent to backstage; so that relaying protection system is sent separating brake instruction; order circuit breaker carries out sub-switching operation; fault is cut off, in order to avoid fault coverage further expands, reduced economic loss.It is large that described electronic type voltage transformer EVT has electric field strength nargin, and the reliable and dividing potential drop electric capacity of insulation property can double as coupling capacitor for there will not be the advantages such as ferro resonance in radio frequency carrier channel, use.

Claims

1. the novel semi-enclosed combined electrical apparatus that electronic type voltage transformer is housed, comprise three groups of switch elements and sleeve pipe, first group of switch element is connected between the first sleeve pipe and the second sleeve pipe, second group of switch element is connected between the second sleeve pipe and the 3rd sleeve pipe, the 3rd group of switch element is connected between the 3rd sleeve pipe and Quadruplet pipe, it is characterized in that: also comprise two electronic type voltage transformers, the first electronic type voltage transformer is located between the second sleeve pipe and second group of switch element, the second electronic type voltage transformer is located between the 3rd sleeve pipe and second group of switch element.