Simulation of Breaking Characteristics of a 550kV Single-Break Tank Circuit Breaker

Hongfei ZHAO; Xiaohua WANG; Zhiying MA; Mingzhe RONG; Yan LI

doi:10.1587/transele.E94.C.1402

Special Section on Recent Development of Electro-Mechanical Devices — Papers selected from International Session on Electro-Mechanical Devices (IS-EMD2010) and other research results —

Simulation of Breaking Characteristics of a 550kV Single-Break Tank Circuit Breaker

Hongfei ZHAO, Xiaohua WANG, Zhiying MA, Mingzhe RONG, Yan LI

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Keywords: capacitive current switching, short-circuit current breaking, tank circuit breaker, FVM, gas flow field

JOURNAL RESTRICTED ACCESS

2011 Volume E94.C Issue 9 Pages 1402-1408

DOI https://doi.org/10.1587/transele.E94.C.1402

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Abstract

An arc model has been applied in this paper to study the fundamental interruption environment of a 550kV SF₆ single-break tank circuit breaker. The full differential model takes into account of all important physical mechanisms and is implemented into a commercial Computational Fluid Dynamics (CFD) package, PHOENICS. The model takes a magneto-hydro-dynamics (MHD) approach and the governing equations are solved using the Finite Volume Method (FVM). Through the simulation, the flow velocity vector and mach number for capacitive current switching and short-circuit current breaking are analyzed, and flow dynamic characteristics are obtained. The simulation can provide helpful reference for the design of 550kV SF₆ single-break tank circuit breaker.

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