电测与仪表2018，Vol.55Issue(3)：123-128,136,7.
辐射电场特征能量提取法在评估GIS状态中的应用研究
Research on extraction of characteristic energy of radiated E-field method in evaluating GIS status
摘要
Abstract
Switching operations of a disconnecting switch (DS) or a circuit breaker (CB) in a gas insulated substation (GIS) can stimulate outside GIS strong radiated electromagnetic fields.In order to assess the health status of GIS through its measured characteristic parameters,a method of extracting the characteristic frequency-band energy of the electric field (E-field) based on wavelet packet analysis is proposed.The radiated E-field signals of CB in good condition and those of CB in which insulation fault happens are separately decomposed into 4 layers by using the bior5.5 wavelet basis function,and the normalized energies of different frequency bands are extracted;then,it's found that the frequency band below 31.25 MHz is the characteristic frequency band of radiated E-field.By comparing the energies in the characteristic frequency bands after a random CB operation with that of the typical radiated E-field obtained when GIS totally is in good condition,insulation faults of CB can be detected and the operating state of GIS could be evaluated.关键词
小波包分解/特征提取/辐射电场/GIS/CB/状态评估Key words
wavelet packet decomposition/feature extraction/radiated E-field/GIS/CB/state assessment分类
信息技术与安全科学引用本文复制引用
郝金鹏,张鸿业,郭飞,郭俊,李秀广,吴旭涛..辐射电场特征能量提取法在评估GIS状态中的应用研究[J].电测与仪表,2018,55(3):123-128,136,7.基金项目
国家自然科学基金资助项目(51277148) （51277148）
国家国际科技合作专项资助(2013DFR70610) （2013DFR70610）
国网宁夏电力公司科技项目(5229DK150018) （5229DK150018）
