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电网技术  2015 

直流电压下环氧绝缘材料电气性能对电荷积聚的影响

DOI: 10.13335/j.1000-3673.pst.2015.05.044, PP. 1463-1468

Keywords: 直流电压,环氧绝缘材料,电气性能,表面电荷,积聚

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Abstract:

为研究环氧绝缘材料电荷积聚过程的影响因素,减少材料表面电荷积聚效应,采用高阻计对直流电压下环氧绝缘材料不同时间点的体积电阻率和表面电阻率等关键电气性能进行测量,并采用直流试验装置,借助电容探头法进行直流高压下的表面电荷测量。通过相关理论研究,获得了环氧绝缘材料电阻率随直流电压作用时间的关系,建立了环氧绝缘材料电气性能与电荷积聚的关系,并明确了环氧绝缘材料电气性能的改进措施,对于减少直流电压下,环氧绝缘材料的表面电荷积聚,提高输变电设备直流绝缘子运行可靠性具有实际意义。

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