过电压下电气设备局部放电特性研究现状
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摘要
电气设备局部放电往往是由过电压所激发的,研究过电压下电气设备局部放电特性对电气设备过电压防护和故障诊断具有重要的意义。相同的绝缘缺陷在不同电压波形作用下局部放电特性明显不同;相同电压波形作用下不同绝缘缺陷局部放电特征也存在明显的差异。从过电压的产生原因出发,对不同类型过电压的特点和不同类型过电压下SF_6气体绝缘和油纸绝缘典型绝缘缺陷的局部放电特性进行了归纳总结。指出多电压联合下的局部放电特性研究更能描述电气设备的实际运行情况。
Electrical equipment partial discharge is often stimulated by overvoltage. The research on partial discharge characteristics of electrical equipment under overvoltage is of great significance for overvoltage protection andfault diagnosis of electrical equipment. The partial discharge characteristics of the same insulation defects are obvi-ously different under the actions of different voltage waveforms,and the partial discharge characteristics of differentinsulation defects are obviously different under the same voltage waveform. Based on the causes of overvoltage,thispaper summarizes the characteristics of different types of overvoltage as well as the partial discharge characteristicsof typical defects of SF_6 gas insulation and oil-paper insulation under different types of overvoltage. It is pointed outthat the researches of partial discharge characteristics under multi-voltage combination can better describe the actual operation of electrical equipment.
Electrical equipment partial discharge is often stimulated by overvoltage. The research on partial discharge characteristics of electrical equipment under overvoltage is of great significance for overvoltage protection andfault diagnosis of electrical equipment. The partial discharge characteristics of the same insulation defects are obvi-ously different under the actions of different voltage waveforms,and the partial discharge characteristics of differentinsulation defects are obviously different under the same voltage waveform. Based on the causes of overvoltage,thispaper summarizes the characteristics of different types of overvoltage as well as the partial discharge characteristicsof typical defects of SF_6 gas insulation and oil-paper insulation under different types of overvoltage. It is pointed outthat the researches of partial discharge characteristics under multi-voltage combination can better describe the actual operation of electrical equipment.
引文
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[8]李军浩,韩旭涛,刘泽辉,等.电气设备局部放电检测技术述评[J].高电压技术,2015,41(8):2583-2601.LI Junhao,HAN Xutao,LIU Zehui,et al. Review on partial discharge measurement technology of electrical equipment[J].High Voltage Engineering,2015,41(8):2583-2601.
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