能量分离喷口高压SF<sub>6</sub>断路器灭弧室电场分析

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摘要提出新型能量分离型喷口结构,在喷口上游引入X型导流片,以改变气流流路。为分析新型喷口对灭弧室内部电场分布的影响,采用有限元法,结合550 kV SF₆断路器绝缘型式实验要求,对有无导流片结构的高压SF₆断路器灭弧系统的绝缘特性进行数值计算与分析,得到在开断过程中导流片结构对断路器灭弧室内电场分布的影响。三维电场计算结果表明,有导流片结构的灭弧室内部最大电场强度值较无导流片结构有所降低,最大降低量为4.8%。

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	李俐莹
	刘晓明

关键词 ：能量分离, 电场, 高压SF₆断路器, 能源互联网

Abstract：A novel nozzle structure with energy separation structure,which adopts the X-type guide blade at the nozzle upstream domain,is proposed in this paper to change the gas flow path.In order to analyze the influences of the proposed structure on the electric field distribution of the arc quenching chamber,this paper utilizes the finite element method and considers the experimental requirements for testing 550 kV SF₆ circuit breaker insulation to calculate and analyze the insulation characteristics of the arc-quenching system in the circuit breaker with and without the guide blade.Therefore,the influences of the blade structure on the electric field distribution of the breaker quenching chamber during breaking process can be obtained.According to the 3D electric field calculation results,the maximum electric field strength of the arc quenching chamber with the guide blade structure is lower than that without it,and the maximum reduction percent age reaches 4.8%.

Key words： Energy separated electric field high voltage SF₆ circuit breaker InterGrid

收稿日期: 2015-02-15 出版日期: 2015-09-14

PACS:

TM561.3

基金资助:国家自然科学基金(51377106)和国家自然科学基金重点项目(51337001)资助。

通讯作者: 李俐莹女,1986年生,博士研究生,研究方向为现代电器设计与应用。

作者简介: 刘晓明女,1968年生,教授,博士生导师,研究方向为现代电器设计与应用、高电压与绝缘技术、智能电器等。

引用本文:

李俐莹,刘晓明. 能量分离喷口高压SF₆断路器灭弧室电场分析[J]. 电工技术学报, 2015, 30(13): 56-62. Li Liying ,Liu Xiaoming. Analysis on the Electrical Field of High Voltage SF₆ Arc Quenching Chamber with Energy Separation Nozzle. Transactions of China Electrotechnical Society, 2015, 30(13): 56-62.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I13/56

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