| 覆冰绝缘子直流闪络特性研究现状 |
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| 引用本文： | 谢述教,蒋兴良,王强,刘仲全,何平安. 覆冰绝缘子直流闪络特性研究现状[J]. 高电压技术, 2004, 30(1): 16-18 |
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| 作者姓名： | 谢述教 蒋兴良 王强 刘仲全 何平安 |
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| 作者单位： | 重庆大学电气工程学院高电压与电工新技术教育部重点实验室,重庆,400044;西南电力设计院,成都,610061;湖南省娄底电业局,娄底,417000 |
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| 摘 要： | 在总结大量文献研究成果基础上 ,从闪络特性和机理等方面分析了覆冰绝缘子直流闪络的各种影响因素。结果表明 :闪络电压与覆冰类型、覆冰水电导率、覆冰量及气压等有关 ;长串的直流闪络梯度较短串小 ,闪络频率与电压梯度成正比 ;闪络是由持续、高幅值的泄漏电流融化冰层所致。并提出了覆冰绝缘子闪络特性方面亟待研究的课题。
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| 关 键 词： | 高压输电 绝缘子 闪络电压 外绝缘 |
| 修稿时间： | 2003-05-08 |
State-of-the-Art of DC Flashover Characteristics of Iced Insulators |
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| Xie Shujiao ,Jiang Xingliang ,Wang Qiang ,Liu Zhongquan ,He Ping'an. State-of-the-Art of DC Flashover Characteristics of Iced Insulators[J]. High Voltage Engineering, 2004, 30(1): 16-18 |
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| Authors: | Xie Shujiao Jiang Xingliang Wang Qiang Liu Zhongquan He Ping'an |
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| Affiliation: | Xie Shujiao 1,Jiang Xingliang 1,Wang Qiang 2,Liu Zhongquan 2,He Ping'an 3 |
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| Abstract: | Based on references, the flashover performance and mechanism of external insulation of high voltage transmission lines in special conditions are analyzed and summarized in this paper. It analyzes the factors which affect the flashover voltage of iced insulators, and summarizes its flashover mechanism systematically. It is indicated that the flashover voltage of iced insulators is related to icing type, the conductivity of icing water, the ice amount, the air pressure and so on; and the DC flashover voltage gradient of a longer insulator string is lower than shorter one, the flashover frequency is linear with voltage gradient; and the flashover of iced insulators is caused by melted ice with the continuous and high amplitude leakage current. Finally it puts forward the problems in flashover performance of iced insulator which have to be studied at present. |
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| Keywords: | HV transmission insulator flashover voltage external insulation |
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