On site PD detection on XLPE cable accessories

Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005. Pub Date : 1900-01-01 DOI:10.1109/EEIC.2005.1566253

Wei Wang, Changyu Li, Chengrong Li, Bin Zheng, Luhua Zhang

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引用次数: 3

Abstract

On-site partial discharge detection on XLPE cables accessories is very difficult because of pulse noise interference, such as pulse interference created by automobile ignition coils on the street, etc. A suitable solution for the monitoring of cable accessories during operation is a sensitive on-site PD detection method. This can be realized in an advantageous way with combinatorial sensors, an antenna sensor, a UHF sensor, and two VHF split-core PD sensors. These sensors are not connected to the high voltage directly, a UHF sensor can be placed near the cable joint and two split-core sensors can be installed on both sides of the cable joint easily and safely. The detection making several windows in the time domain towards multiple wide-band pulse signals can achieve reliable discrimination of real internal PD and external noise under noisy on site conditions. More than twenty cases of on-site PD detection for HV XLPE cables have been proven this way. This method has high detection sensitivity and high noise recognition ability

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XLPE电缆附件现场PD检测

由于脉冲噪声的干扰，如街道上汽车点火线圈产生的脉冲干扰等，使得XLPE电缆附件现场局部放电检测非常困难。对于电缆附件在运行过程中的监控，一个合适的解决方案是采用敏感的现场PD检测方法。这可以通过组合传感器、天线传感器、UHF传感器和两个VHF分芯PD传感器以一种有利的方式实现。这些传感器不直接与高压连接，一个超高频传感器可以放置在电缆接头附近，两个分芯传感器可以安装在电缆接头两侧，方便安全地安装。对多个宽频带脉冲信号在时域上开几个窗口的检测，可以在噪声现场条件下实现对真实内部PD和外部噪声的可靠判别。20多个高压交联聚乙烯电缆现场PD检测案例证明了这种方法的有效性。该方法检测灵敏度高，噪声识别能力强

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Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.

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