Research on rotary-gas high voltage SF6 circuit breaker with novel blade nozzle Part II: Motion behavior analyses under cold flow interruption

Author

Cao, Yundong ; Wang, Shu ; Liu, Xiaoming ; Qi, Zhiming

Author_Institution

Sch. of Electr. Eng., Shenyang Univ. of Technol., Shenyang, China

fYear

2011

fDate

23-27 Oct. 2011

Firstpage

131

Lastpage

134

Abstract

A 252kV single-break SF₆ circuit breaker (CB) is taken as the investigation model in this paper, and six different nozzles with different blade contour and 3D gas flow field model are presented based on N-S equations. And the variations of the cold flow field parameters in arc-quenching chamber with different nozzles have been obtained using finite volume method (FVM) during the interrupting. The influences of blade contour on the gas flow parameters, such as velocity, pressure-temperature ratio and pressure are analyzed by changing the angle, number and the height of the blade. And the reasonable nozzle blade structure of the rotary-gas CB is obtained.

Keywords

arcs (electric); blades; circuit breakers; finite volume methods; flow; nozzles; sulphur compounds; 3D gas flow field model; SF₆; arc quenching chamber; blade contour; blade nozzle; cold flow interruption; finite volume method; flow velocity; gas flow parameter; gas pressure; nozzle blade structure; pressure-temperature ratio; rotary gas high voltage circuit breaker; single break circuit breaker; voltage 252 kV; Blades; Circuit breakers; Dielectrics; Equations; Fluid flow; Mathematical model; Sulfur hexafluoride;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Power Equipment - Switching Technology (ICEPE-ST), 2011 1st International Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4577-1273-9

Type

conf

DOI

10.1109/ICEPE-ST.2011.6122952

Filename

6122952