【摘要】 合成绝缘子在线检测方法的研究对于提高电力系统运行的安全可靠性具有十分重要的意义。利用脉冲电流法检测系统对合成绝缘子在不同电压下的脉冲电流特性进行了研究。介绍了脉冲电流法的检测系统的组成,采用加高电压模拟老化的方法对合成绝缘子的脉冲电流特性进行了研究,实验结果表明合成绝缘子局放脉冲主要出现在工频相位的70°~140°和250°~330°之间,且随着合成绝缘子老化程度的加深脉冲电流的幅值、脉冲个数和产生相位的范围都增大。更多还原

【Abstract】 The study of on-line detecting method for composite insulator is important for improve the safety of the power system.In this paper,on-line detection for composite insulator based on pulse current method is studied.The constituent parts and the realization of the detecting system are introduced.In laboratory,using the measurement system,with the method of heightening voltage to simulate aging,the partial discharge impulse current characteristics of the composite insulators have been studied.The results indicate that partial discharge impulses mainly occur between 70°～140° and 250°～330° in power frequency phrase,and the amplitude of impulse current,the number of the impulse and the phase scope where occurs increase alongwith the development of the composite insulators aging.更多还原