| 染污绝缘子串直流污闪放电模型及验证 |
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| 引用本文： | 张志劲,蒋兴良,孙才新,胡建林,苑吉河. 染污绝缘子串直流污闪放电模型及验证[J]. 电工技术学报, 2009, 24(4) |
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| 作者姓名： | 张志劲 蒋兴良 孙才新 胡建林 苑吉河 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，重庆大学青年骨干教师创新能力培育基金 |
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| 摘 要： | 绝缘子污秽闪络事故严重威胁电力系统的安全可靠运行,目前国内外对污闪机理的研究主要是以平板模型为基础.本文以7片串XP-160绝缘子为例,开展染污绝缘子串直流污闪放电模型研究.提出染污绝缘子串直流放电过程的电路模型是由剩余污层电阻、沿面电弧和空气间隙电弧串联组成;根据模型计算所得的临界污闪电压与实测值的误差在7%以内;得到泄漏电流大于200mA时,染污绝缘子串局部电弧的综合受力中热浮力起主导作用,解释了局部电弧发展中存在飘弧现象的原因.
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| 关 键 词： | 直流 绝缘子串 污闪模型 泄漏电流 |
DC Pollution Flashover Model and Its Validation of Polluted Insulator Strings |
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| Zhang Zhijin,Jiang Xingliang,Sun Caixin,Hu Jianlin,Yuan Jihe. DC Pollution Flashover Model and Its Validation of Polluted Insulator Strings[J]. Transactions of China Electrotechnical Society, 2009, 24(4) |
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| Authors: | Zhang Zhijin Jiang Xingliang Sun Caixin Hu Jianlin Yuan Jihe |
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| Affiliation: | The Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China |
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| Abstract: | Pollution flashover accidents of insulators may threaten the operation safety of power system,whereas,the research on pollution mechanism is based on plate model by now.Take seven units of XP-160 for example,the paper studies the DC pollution flashover model of polluted insulator string.The electrical circuit model explaining the DC flashover process of polluted insulator string is put forward in this paper,which consists of a surface arc,air gap arc and residual resistance of the pollution layer.The relati... |
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| Keywords: | DC insulator string pollution flashover model leakage current |
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