油浸式配电变压器局部放电检测技术及模式识别综述

Review of Partial Discharge Detection Technology and Pattern Recognition of Oil-immersed Distribution Transformer

绝缘性能的稳定性是保证油浸式配电变压器正常运行的重要因素,不同绝缘劣化产生的局部放电特征存在差异。为此首先分析油浸式配电变压器绝缘结构、局部放电类型,在此基础上,进一步分析脉冲电流法、超声波检测法、特高频检测法、溶解气体分析法等4类局部放电常用检测方法,以及常见局部放电类型的模式构造、特征参数提取与不同局部放电检测方法的模式识别方法。最后从检测方法、模式识别、传感技术、新兴技术等方面展望了后续研究思路。

The stability of insulation performance is an important factor to ensure the normal operation of the oil-immersed distribution transformers,and there are differences in the characteristics of partial discharge generated by different insulation degradation.This paper firstly analyzes the insulation structure and partial discharge types of the oil-immersed distribution transformer.On this basis,it further analyzes four common detection methods of partial discharge,such as pulse current method,ultrasonic detection method,ultra-high frequency detection method and dissolved gas analysis method,as well as the pattern construction,feature parameter extraction and pattern identification methods of different partial discharge detection methods for common partial discharge types.Finally,the paper prospects the subsequent research ideas of detection methods,pattern recognition,sensing technology and emerging technologies.