Influence of Nozzle Expansion Angle on the Breaking Performance of Ultra-high Voltage SF6 Circuit Breaker

Hao Zhang, Yongqi Yao, Yujing Guo, Zhijun Wang, Bo Zhang, Yapei Liu, Yingqian Du
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引用次数: 1

Abstract

In order to ensure that the ultra-high voltage SF6 circuit breaker has good breaking performance, the two nozzle structures respectively using one expansion angle and two expansion angles are designed. The flow field distribution during the breaker breaking process is obtained by numerical simulation, and the influence of the two kinds of expansion angle design structures on the breaking performance are compared and analyzed. The several different design structures of one expansion angle are also researched, and the recommended interrupter structure is verified by short-circuit breaking test. The results of simulation and test show that, compared with the two expansion angle structure, the interrupter using one expansion angle structure has better breaking performance, which is of great significance to the design of ultra-high voltage SF6 circuit breaker nozzle.
喷嘴膨胀角对超高压SF6断路器开断性能的影响
为了保证超高压SF6断路器具有良好的分断性能,设计了分别采用一个膨胀角和两个膨胀角的两种喷嘴结构。通过数值模拟得到了破碎机破碎过程中的流场分布,对比分析了两种膨胀角设计结构对破碎性能的影响。研究了同一膨胀角的几种不同设计结构,并通过短路开断试验验证了所推荐的断流器结构。仿真和试验结果表明,与两种膨胀角结构相比,采用一种膨胀角结构的断流器具有更好的断流性能,这对超高压SF6断路器喷嘴的设计具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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