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电网技术  2011 

低气压下XP–160型绝缘子覆冰交直流闪络特性比较

, PP. 150-156

Keywords: 气压,绝缘子串,覆冰,交流闪络特性,直流闪络特性,染污方式

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Abstract:

低气压、污秽及覆冰共存的环境下绝缘子的电气性能将大为降低,国内外在该领域已进行了较多的研究,但是关于该环境下绝缘子在交、直流电压下闪络特性差异的研究却鲜见报道。作者在大型多功能人工气候室对7片串XP–160盘形悬式绝缘子进行人工覆冰闪络试验,研究了固体涂层法和覆冰水电导率法2种染污方式下气压和污秽对绝缘子串覆冰闪络电压的影响,得出了两者影响覆冰闪络电压的特征指数并对其进行分析。结果表明气压对50%交流冰闪电压影响的程度大于直流,且不同染污方式下气压影响冰闪电压的特征指数略有差异;气压与污秽对冰闪电压的影响互相独立;污秽对交流冰闪电压的影响程度大于直流。

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