PD characteristics in an air-filled void at room temperature under superimposed sinusoidal voltages
PD characteristics in an air-filled void at room temperature under superimposed sinusoidal voltages
复制标题
叠加正弦电压下室温下充满空气的空隙中的局放特性
DOI：
10.1109/94.919953
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发表时间：
2001
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;S. Tsuru;K. Imasaka;J. Suehiro;M. Hara
为了阐明电压叠加的影响，在室温下研究了正弦叠加电压作用下人工充气腔内的局部放电。所施加的电压波形由60 Hz的基波正弦波和300 Hz至1.2 kHz的高频正弦波组成。结果表明，在60 Hz正弦电压下，叠加电压峰值达到PD起始电压时，PD开始发生。在60 Hz正弦电压下，当高频分量的峰值超过临界值时，PD发生频率显著增加，临界值小于PD起始电压。讨论了在这种条件下的局部放电特性，以及由先前的局部放电沉积在空隙中的表面电荷引起的残余电压的影响。实验结果表明，高频成分的叠加加速了含空穴缺陷固体绝缘子的降解。
Partial discharge in an artificial air-filled void under superimposed sinusoidal voltages is investigated at room temperature in order to clarify the effect of voltage superposition. The applied voltage waveform is composed of a 60 Hz fundamental sinusoidal wave and a high frequency sinusoidal wave of 300 Hz to 1.2 kHz. It was found that PD started when the peak value of the superimposed voltage reached the PD inception voltage under 60 Hz sinusoidal voltage. Also, PD occurrence frequency increased remarkably when the peak value of the high frequency component exceeded a critical value, which is smaller than the PD inception voltage under 60 Hz sinusoidal voltage. PD characteristics under such conditions were discussed as the effect of the residual voltage, caused by the surface charge deposited in the void by the preceding PD. The obtained experimental results suggest that the superposition of high frequency component accelerates the degradation of the solid insulator containing void defects.