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| Optimization Design for Arc Nozzle of High Voltage SF6 Circuit Breaker Considering Turbulent Influence |
| Wang Erzhi, Liu Xiaoming, Cao Yundong |
| Shenyang University of Technology Shenyang 110023 China |
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Abstract The nozzle structure of high voltage SF6 circuit breaker directly affects the interruption performance. In this paper, based on the former investigation results of the turbulent flow and its influence on dielectric recovery property in arc nozzle of SF6 high voltage circuit breaker, a novel idea of fully considering the turbulent control affects to the supersonic speed flow in arc nozzle is proposed for increasing the dielectric recovery speed and the optimization design of arc nozzle structure is realized, in which the multi “expand-shrink” profile nozzle of 550kV SF6 circuit breaker is chosen as the investigation object. The structure parameters of nozzle profile are taken as the optimization variables and the POWELL algorithm is improved and adopted as optimization strategy. Simulation result of non-load breaking under optimized arc nozzle structure shows that the dielectric recovery property satisfies the cold breaking requirement.
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Received: 28 January 2008
Published: 14 February 2014
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2009, Vol. 24 
