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Erschienen in:
2014 | OriginalPaper | Buchkapitel
A Novel Method of Fault Section Locating Based on Prony Relative Entropy Theory
verfasst von : Ranyue Li, Chaoli Wang, Xiaowei Wang
Erschienen in: Intelligent Computing in Smart Grid and Electrical Vehicles
Verlag: Springer Berlin Heidelberg
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A novel fault line section locating method of non-solidly grounded system based on Prony relative entropy theory was proposed in this paper. Firstly, piecewise Prony algorithm was used to fit the transient zero-sequence current signal of each detection point in the first T/20 cycle after fault occurs; secondly, transient zero-sequence dominant components were extracted and the relative entropy values of adjacent detection points were computed; lastly, the fault section was located by use of the feature that the transient zero-sequence currents from the same side of fault point possess high similarity while the opposite side of fault point possess low similarity. Simulation results verify the validity and accuracy of the method in this paper.