It is difficult to fully extract the features in partial discharge type identification,so a method to march the wave-form similarity between the sampled partial discharge pulse information and classical partial discharge type information directly, which can recognize the partial discharge type by means of the cross-approximate entropy presenting the waveform similarity. In this paper,the different distribution characteristics and styles of various partial discharge type pulses are discussed,and five pulse waveforms of classical partial discharge are summarized. The principle method,identification system and implementation procedure for partial discharge signal identification based on cross-approximate entropy are studied. The experimental result proves that the partial discharge type identification method based on cross-approximate entropy is accurate and effective.%针对局部放电类型识别中不易全面提取特征等问题,提出将采集到的局部放电脉冲信息与经典的局部放电类型信息直接进行波形相识度匹配的方法,该方法只需通过表征波形相似性的互近似熵值便可识别出局部放电类型.首先讨论不同局部放电类脉冲所具有的不同分布特点和样式,归纳分析五种典型局部放电的脉冲波形.具体研究基于互近似熵进行局部放电信号识别的原理方法、识别系统和实现流程.实验结果证实了基于互近似熵的局部放电识别方法的准确性和高效性.
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