Insulation fault diagnosis based on group grey relational grade analysis method for power transformers  

基于群灰色关联度分析方法的电力变压器绝缘故障诊断(英文)

作　　者：董立新[1] 肖登明[1] 刘奕路 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]弗吉尼亚理工学院计算机与电气工程系,美国弗吉尼亚州24061

出　　处：《Journal of Southeast University(English Edition)》2005年第2期175-179,共5页东南大学学报（英文版）

基　　金：TheNationalNaturalScienceFoundationofChina(No. 50128706)

摘　　要：Utilising dissolved gases analysis, a new insulation fault diagnosis methodfor power transformers is proposed. This method is based on the group grey relational grade analysismethod. First, according to the fault type and grey reference sequence structure, some typicalfault samples are divided into several sets of grey reference sequences. These sets are structuredas one grey reference sequence group. Secondly, according to a new calculation method of the greyrelational coefficient, the individual relational coefficient and grade are computed. Then accordingto the given calculation method for the group grey relation grade, the group grey relational gradeis computed and the group grey relational grade matrix is structured. Finally, according to therelational sequence, the insulation fault is identified for power transformers. The results of alarge quantity of instant analyses show that the proposed method has higher diagnosis accuracy andreliability than the three-ratio method and the traditional grey relational method. It has goodclassified diagnosis ability and reliability.基于变压器油中溶解气体分析,提出了一种基于群灰色关联度分析的变压器绝缘故障诊断新方法.首先根据故障类型与灰色参考序列构造,选择变压器典型故障样本构造多组参考序列,这些参考序列组构成一个灰色参考序列群.其次根据给出的新的关联系数计算方法,计算个体关联系数和关联度.然后根据给出的群灰色关联度计算方法,计算群灰色关联度和构造群灰色关联度矩阵.最后根据关联序识别变压器绝缘故障诊断.通过大量变压器绝缘故障诊断实例分析,所提方法诊断准确性与可靠性优于三比值法和传统的灰色关联分析方法,具有较好的分类诊断能力和可靠性.

关 键 词：dissolved gases analysis group grey relational grade fault diagnosis 

分 类 号：TM41[电气工程—电器] TM855