基于局部放电信息融合的变压器状态监测与评估技术  

Transformer Condition Monitoring and Evaluation Technology Based on Partial Discharge Information Fusion

作　　者：江相伟 叶尚兴 陈博 朱浩 吴一庆[4] 江友华 JIANG Xiangwei;YE Shangxing;CHEN Bo;ZHU Hao;WU Yiqing;JIANG Youhua(Anqing Power Supply Company of State Grid,Anhui Electric Power Co.,Ltd.,Anqing 246000,China;Lishui Power Supply Company of State Grid,Zhejiang Electric Power Co.,Ltd.,Lishui 323000,China;EHV Branch of State Grid Shanghai Electric Power Company,Shanghai 200063,China;Hangzhou Qianjiang Electric Group Co.,Ltd.,Hangzhou 311241,China;School of Electronic and Information Engineering,Shanghai Electric Power University,Shanghai 201306,China)

机构地区：[1]国网安徽省电力有限公司安庆供电公司,安徽安庆246000 [2]国网浙江省电力有限公司丽水供电公司,浙江丽水323000 [3]国网上海市电力公司超高压分公司,上海200063 [4]杭州钱江电气集团股份有限公司,浙江杭州311241 [5]上海电力大学电子与信息工程学院,上海201306

出　　处：《仪表技术》2023年第4期47-50,共4页Instrumentation Technology

基　　金：上海市科技创新行动计划(21ZR14248006)。

摘　　要：目前在研究变压器局部放电过程中,通常采用单一局部放电检测方式对变压器进行状态监测与评估。对于结构相对复杂的变压器,此类检测技术及算法存在误检、漏检等缺陷,造成变压器状态评估不合理、工程应用不佳等问题。提出了一种基于局部放电信息融合的变压器状态监测与评估策略,针对同一放电源通过超声波、特高频、高频3种局部放电检测方式的信息融合评估变压器的运行状态。为了克服主客观因素对评估结果的决定性影响,采用主观赋权和客观赋权的组合赋权方式得到综合权重,并运用可拓学中的物元分析法建立变压器状态评估模型和关联度矩阵,确定变压器运行状态所隶属的评价等级。实例计算表明,基于局部放电信息融合的方法能够减少评估过程中不确定性和主观性等问题,从而得到更为合理、客观的评估结果。At present,during the study of partial discharge of transformer,a single partial discharge detection method is usually used to monitor and evaluate the condition of transformer.For the transformer with relatively complex structure,the false or missing detection will occur by using this method,which results in unreasonable transformer condition evaluation and poor engineering application.Therefore,a transformer condition monitoring and evaluation strategy based on partial discharge information fusion is proposed in this paper.For the same discharge power supply,the transformer operation state is evaluated through the information fusion of three partial discharge detection methods:ultrasonic,UHF and high-frequency current.At the same time,in order to overcome the decisive influence of subjective or objective factors on the evaluation results,this paper uses the combined weighting method of subjective weighting and objective weighting to obtain the comprehensive weight,and uses the matter-element analysis method in Extenics to establish the transformer state evaluation model and correlation matrix to determine the evaluation level of transformer operation state.The example calculation shows that the method based on partial discharge information fusion can reduce the uncertainty and subjectivity in the evaluation process,so as to obtain more reasonable and objective evaluation results.

关 键 词：变压器 局部放电 信息融合 状态监测 评估 

分 类 号：TM933[电气工程—电力电子与电力传动]