A New Algorithm of Phase to Ground Fault Location for Electric Power Feeder

Abstract:

t is a great significance for power supply reliability and smart grid to locate feeder fault quickly and accurately for distribution network. A new ground fault traveling-wave signal time-frequency analysis method is proposed, which decomposes the aerial mode component and zero mode component of fault current based on EMD to 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 check the moment of traveling wave arrival by the instantaneous frequency in the figure of IMF time-frequency. The fault distance is computed based on the time difference between the moments of wave arrived of aerial mode component and zero mode components. Simulation shows that this method is able to accurately give the distance of fault without the influence of the random fault condition such as fault transition resistance and the moment of fault.

• Periodical: Applied Mechanics and Materials (Volumes 313-314)
• Pages: 1304-1310
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.313-314.1304
• Online since: March 2013
• Authors: Yan Song Wang, Xue Min Liu
• Keywords: Distribution Network, Fault Location, Feeder, Hilbert-Huang Transformation, Phase to Ground Fault

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