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电网技术  2006 

冰凌针-板间隙直流正极性下起始电晕特性的研究

, PP. 32-36

Keywords: 冰柱冰板模型,空气间隙,电晕,起晕电压,覆冰绝缘子,高电压绝缘技术

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Abstract:

覆冰是电力系统的严重自然灾害之一。覆冰绝缘子伞裙间隙未桥接时,冰凌尖端的放电是影响绝缘子闪络电压的主要因素之一。选择冰柱–冰板间隙模型,借助于紫外线成像仪等设备,在人工气候室内研究了冰凌–冰板模型的电晕特性,提出了用紫外线成像仪确定冰凌–冰板起晕电压的方法,分析了影响冰凌起晕电压的因素。结果表明冰凌–冰板间隙起晕电压与冰凌状态有关,湿冰的起晕电压较低,干冰的起晕电压较高;间隙较长,起晕电压较高;气压较低,起晕电压较低;冰凌起晕电压与覆冰水电导率没有明显关系。

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