Partial discharge measurements in dielectric liquids under impulse voltage

H. Yamashita
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引用次数: 20

Abstract

Current pulses caused by partial discharges (PDs) are measured using light-emitting diodes (LEDs) and fiber optics under impulse voltage conditions. This system has the advantage of having good isolation from the HV power supply and no effect from electromagnetic noise as compared with ordinary systems. It can detect a PD pulse having a half width of 3 ns, and has the capability of measuring PD pulse charges in the range of 1 to 2000 pC, when the optimum DC bias is applied. PD pulses and light emission or streamer formation in dielectric liquids are measured simultaneously by using an image converter camera. >
脉冲电压下介电液体的局部放电测量
在脉冲电压条件下,利用发光二极管(led)和光纤测量由局部放电(pd)引起的电流脉冲。与普通系统相比,该系统具有与高压电源隔离良好,不受电磁噪声影响的优点。它可以检测半宽3ns的PD脉冲,当施加最佳直流偏压时,具有测量1 ~ 2000pc范围内PD脉冲电荷的能力。利用图像转换相机同时测量介质液体中的PD脉冲和光发射或流光形成。>
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