A New Algorithm of Phase to Ground Fault Location for Electric Power Feeder
As to power supply reliability and smart grid, it is very significant to locate feeder fault quickly and accurately for distribution network.A new method is proposed, which aims at analyzing timefrequency traveling-wave signal caused by ground fault.By decomposing the aerial mode component and zero mode component of fault current based on EMD, the method can get multi-stage stable intrinsic mode function (IMF).The first IMF contains high frequency components, which can reflect the mutation of signal. Hilbert-Huang transformation is done for the first IMF to get the instantaneous frequency of signal.And then the moment of traveling wave arrival can be detected by observing the instantaneous frequency in the figure of IMF time-frequency.The fault distance is computed based on the difference of wave arrival time between aerial mode component and zero mode component.Simulation shows that this method can accurately determine the distance of fault and doesnt be influenced by the random fault condition, such as fault transition resistance and the moment of fault.
Distribution network Hilbert-Huang Transformation feeder fault location phase to ground fault
Yan-Song Wang Yong-Chang Guan Xue-Min Liu
College of Information and Control Engineering,China University of Petroleum,Qingdao,China Dongying Power Supply Company,Shandong Province,Dongying,China
国际会议
成都
英文
426-429
2011-09-27（万方平台首次上网日期，不代表论文的发表时间）