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A Novel Fault Location Method Based on Impedance Angle Analysis

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2 Author(s)
Duo Chen ; Sch. of Electr. & Inf. Eng., Changsha Univ. of Sci. & Technol., Hunan ; Zhong Chen

From the view of pattern recognition, a novel fault location method based on impedance angle analysis at different frequencies is proposed in this paper. It firstly deduces the sign change rule of the impedance angle (impedance angle reverse) at different frequency is related with the length from the sending end to the fault location. Further, from the theoretic analysis, the conclusion that the influence of transient resistance can be negligible in this method is shown. It samples the transient voltage at the sending end and the transient currents flow through the transmission line during the fault and analyzes the phase relation between voltage and current signals at different frequency with fast Fourier transforms (FFT) algorithm. As a result, the impedance angle reverse at different frequency can be used to locate the fault. The accordance of the theoretic analysis and the simulating results indicates the feasibility of the method

Published in:

TENCON 2006. 2006 IEEE Region 10 Conference

Date of Conference:

14-17 Nov. 2006

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