Partial Discharge Characteristics in an Artificial Air-filled Void under Superimposed Sinusoidal Voltages at LN2 Temperature
Partial Discharge Characteristics in an Artificial Air-filled Void under Superimposed Sinusoidal Voltages at LN2 Temperature
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液氮温度下叠加正弦电压下人造空气填充空隙中的局部放电特性
DOI：
10.1541/ieejpes.123.1280
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Hara
中科院分区：
文献类型：
--
作者：
T. Kurihara;Takanori Nishioka;J. Suehiro;M. Hara
在液氮温度（77K）下，对固体绝缘体中的人造空气填充空隙内的局部放电（PD）特性进行了实验研究，叠加了60Hz和600Hz的正弦电压，以发现畸变正弦电压波形对77K时局部放电特性的影响。结果表明，77K 时的局部放电起始电压与所施加的电压波形无关。结果还表明，当叠加电压的600Hz分量以其恒定峰值增加时，局部放电强度似乎与电压波形无关，而局部放电脉冲数增加。由于77K时的局放电荷强度和脉冲数与298K时的显着不同，因此根据在两种温度下60Hz交流电压下经受局放的空隙表面上残留的残余电荷分布的观察结果来讨论其机制。
Partial discharge (PD) characteristics within an artificial air-filled void contained in a solid insulator were experimentally investigated under superimposed sinusoidal voltages of 60 and 600Hz at liquid nitrogen temperature (77K) to find the effects of the waveforms of distorted sinusoidal voltages on PD characteristics at 77K. The results show that PD inception voltage at 77K is independent of the applied voltage waveform. The results also show that, when the 600Hz component of the superimposed voltage is increased with its constant peak value, PD intensity seems to be independent of the voltage waveform, whereas PD pulse number increases. Since PD charge magnitude and pulse number at 77K were remarkably different from those at 298K, their mechanisms are discussed based on the observation results of residual charge distributions remaining on a void surface subjected to PDs under 60Hz ac voltages at both temperatures.