棒形悬式复合绝缘子陡波试验影响因素研究

Study on the Influence Factors of Composite Rod Insulator Steep Front Impulse Test

为研究试验回路参数、陡波波形对棒形悬式复合绝缘子陡波试验的影响,利用一支110kV棒形悬式复合绝缘子,在不同冲击电压发生器充电电压、不同陡化球隙距离下开展了陡波试验,对不同回路参数下的陡波电压幅值、陡波电压陡度进行了分析,根据试验中出现的陡波波形特点,对不同类型陡波波形的有效性进行了讨论。研究结果表明,棒形悬式复合绝缘子陡波试验中陡波电压陡度、陡波电压幅值随冲击电压发生器每级充电电压的升高而上升,陡波电压陡度随陡化球隙距离增加呈现先增加后减小的趋势。陡波波形峰值附近的震荡会造成陡度的大幅变化,建议考虑波形第一个峰值及以此峰值计算获得的陡度来判断形有效性。

In order to research the influences of test circuit perimeters and the voltage waveform on composite rod insulators steep front impulse test,tests were carried out on a 110kV composite rod insulator with different generator charging voltage and different steepening sphere distance.The peak value and steepness of voltage were analyzed.According to the waveform characteristics in the tests,the test effectiveness was discussed.It was indicated that the peak value and steepness of voltage would rise with the increasing of the generator charging voltage.The voltage steepness would increase first,then decrease with the longing of the steepening sphere distance.The shock near the peak of the voltage could induce apparent change of the steepness,it is advised that the first peak of the voltage waveform could be used to judge the effectiveness of the test.