A Method to Identify the Second Reverse Traveling Wave Induced by Single-phase-to-ground Fault in Transmission Line

LEI Aoyu1 DONG Xinzhou1 SHI Shenxing1

(1.State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment (Dept. of Electrical Engineering, Tsinghua University), Haidian District, Beijing, China 100084)
【Knowledge Link】traveling wave

【Abstract】Identification of the second traveling wave reflected from the fault point or the remote-end bus is the core of traveling wave based single-end fault location and distance protection with fault location. A method is proposed to identify the second reverse traveling wave based on the cross transmission phenomenon of modal traveling waves in the single-phase-to-ground fault of transmission line, which is independent of the configuration of buses at both ends. The method firstly utilizes the initial traveling wave and the second reverse traveling wave to locate the fault initially and determine the fault area. Then, the relevant characteristic traveling wave pair of the second reverse traveling wave is recognized according to the fault area. Finally, the polarity relation of second reverse traveling wave and its relevant characteristic traveling wave pair are used to identify the source of second reverse traveling wave. If the polarity of the second reverse traveling wave and the polarity of the relevant characteristic traveling wave pair is the same, the second reverse traveling wave is reflected from the fault point; otherwise, from the bus at the remote end. A large number of EMTP simulation cases are carried out, verifying the correctness and validity of the method.

【Keywords】 traveling wave; single-phase-to-ground fault; cross transmission; single-end fault location; distance protection with fault location;

【Funds】 International Cooperation and Exchange of the National Natural Science Foundation of China(51120175001)

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(Translated by LIU T)

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This Article

ISSN:0258-8013

CN: 11-2107/TM

Vol 36, No. 08, Pages 2151-2158

April 2016

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Article Outline

Knowledge

Abstract

  • 0 Introduction
  • 1 Basic principles
  • 2 Algorithm for identifying the second reverse traveling wave
  • 3 Verification of simulation
  • 4 Near-bus fault analysis
  • 5 Conclusions
  • References