A previously developed method of partial discharge (PD) recognition is used to evaluate PD in HV devices. Using conventional discharge detection (bandwidth approximately 400 kHz), the PD patterns are studied. By means of unambiguous statistical operators like skewness, kurtosis, number of peaks, etc., quantitative information about the discharge source can be obtained. In the case of an unknown defect, a combination of these operators is compared to the same set of operators for a known configuration. In this way, a statement can be made on the character of a discharge source. The use of this technique in evaluating different discharges in HV cable and in 400 kV SF/sub 6/ insulation confirms the usefulness of the new approach.
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机译:先前开发的局部放电(PD)识别方法用于评估HV设备中的PD。使用常规的放电检测(带宽约为400 kHz),研究了PD模式。通过明确的统计算子,例如偏度,峰度,峰数等,可以获得有关排放源的定量信息。在未知缺陷的情况下,将这些运算符的组合与已知配置的同一组运算符进行比较。以这种方式,可以对放电源的特性做出说明。通过使用该技术评估高压电缆和400 kV SF / sub 6 /绝缘中的不同放电,证实了该新方法的实用性。
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