基于栈式降噪自编码的变压器“快速发展型”沿面放电状态评估  

Evaluation of"rapidly developing"creeping discharge states of transformers based on stacked denoising autoencoder

作　　者：程林 杨旭[2,3] 刘正阳 张静 聂德鑫[2,3] 张晓星 CHENG Lin;YANG Xu;LIU Zhengyang;ZHANG Jing;NIE Dexin(Hubei University of Technology,Wuhan 430068;Wuhan NARI Co Ltd.,State Grid Electric Power Research Institute,Wuhan 430074;NARI Group Corporation/State Grid Electric Power Research Institute,Nanjing 211006)

机构地区：[1]湖北工业大学,湖北武汉430068 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉4300742 [3]南瑞集团(国网电力科学研究院)有限公司,江苏南京211006

出　　处：《南昌大学学报（理科版）》2022年第2期226-231,238,共7页Journal of Nanchang University(Natural Science)

基　　金：国家电网有限公司总部管理科技项目“超、特高压变压器油纸绝缘快速发展型故障检测与诊断关键技术研究”。

摘　　要：超、特高压变压器结构紧凑、绝缘裕度低,在高电压作用下场强集中区易引发“快速发展型”放电故障。本文通过搭建基于“针-板”缺陷的变压器油纸绝缘“快速发展型”沿面放电试验平台,获取了其不同放电发展状态下的高频脉冲电流信号,根据其相位-幅值和相位-放电次数图谱的差异将其放电过程分成了“前期”(稀疏放电)、“中期”(大幅值剧烈放电)和“后期”(小幅值密集放电)三个发展阶段。在根据其PRPD图谱提取的特征参量基础上,构建了栈式降噪自编码联合支持向量机的评估方法,对变压器“快速发展型”沿面放电的发展状态进行了评估,取得了良好的效果。Ultra-high voltage transformers have compact structure and low insulation margin.The field strength concentration area was likely to cause"rapid development"discharge faults under the high voltage.In this paper,the high-frequency second impulse current signals under different discharge development stages were obtained by building a"rapid development"creeping discharge test platform for transformer oil-paper insulation based on the"pin-plate"defect.According to the difference of its phase-amplitude and phase-discharge maps,the discharge process was divided into three parts:"early stage"(sparse discharge),"middle stage"(large-value intense discharge)and"late stage"(small-amplitude dense discharge).On the basis of 18 characteristic parameters extracted from its PRPD map,an evaluation method of Stacked Denoising Autoencoder joint Support Vector Machine was constructed,and the development status of the"rapidly developing"creeping discharge of the transformer was evaluated,which shows a good effect.

关 键 词：变压器 快速发展型 沿面放电 高频脉冲电流 栈式降噪自编码 

分 类 号：TM215[一般工业技术—材料科学与工程]