低气压下直流绝缘子串污闪过程中局部电弧发展特性_张志劲.pdf
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第29 卷 第25 期 中 国 电 机 工 程 学 报 Vol.29 No.25 Sep. 5, 2009
104 2009 年9 月5 日 Proceedings of the CSEE ©2009 Chin.Soc.for Elec.Eng.
0258-8013 (2009) 25-0104-07 TM 85 A 470 40
文章编号: 中图分类号: 文献标志码: 学科分类号: ⋅
低气压下直流绝缘子串污闪过程中
局部电弧发展特性
张志劲,蒋兴良,孙才新,胡建林,苑吉河
(输配电装备及系统安全与新技术国家重点实验室(重庆大学) ,重庆市 沙坪坝区 400044)
Propagation of Partial Arc During the DC Pollution Flashover Process for
Insulator String at Low Air Pressure
ZHANG Zhi-jin, JIANG Xing-liang, SUN Cai-xin, HU Jian-lin, YUAN Ji-he
(State Key Laboratory of Power Transmission Equipment System Security and New Technology (Chongqing University),
Shapingba District, Chongqing 400044, China)
ABSTRACT: Pollution flashover accidents of insulators may 行,目前国内外对污闪机理的研究主要是以平板模型为基础
threaten the operation safety of power system. The key of the 的,而研究污闪机理的关键是研究局部电弧形成后如何发展
research on pollution mechanism is how the partial arc 成完全闪络。开展低气压下绝缘子串直流污闪过程中局部电
propagates to flashover, and it has been based on plate model 弧发展研究,结果表明:低气压下绝缘子串直流污闪过程中
by now. The propagation of partial arc under low air pressure 局部电弧发展中存在飘弧现象,即局部电弧由沿面电弧和空
during the DC pollution flashover process of insulator is 气间隙电弧2 部分组成;低气压下局部电弧的发展主要决定
researched. The results suggest that some of the partial arcs 于静电力和热浮力,静电力和热浮力随气压变化的规律存在
may deviate from the surface of polluted insulator string and 差异,使得低气压下染污绝缘子串局部电弧的飘弧更严重;
form the air gap arc during the pollution flashover process. The 低气压下染污绝缘子串直流污闪过程中局部电弧的发展缓
partial arcs include two main parts:
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