Accurate Ranging of Hybrid Transmission Lines in Distribution Networks

doi:10.23940/ijpe.20.11.p6.17411752

Abstract

Abstract: There exists a complicated and variable feature of fault transient traveling wave in the hybrid transmission line. This paper proposed a ranging method by combining the single-terminal traveling wave method and two-terminal traveling wave method based on the polarity of the traveling wave. First, the two-terminal traveling wave method was used to calculate the approximate fault distance. Based on the approximate fault distance, and combined with the parameters of the line and the law of traveling wave polarity in the fault section, the reflection wave from the fault point and the reflection wave from the junction of the hybrid line could be accurately identified. The precise distance of the fault was finally calculated based on the time of the reflected wave and the initial traveling wave. The method not only evades errors caused by the synchronization system of global position system (GPS) in the two-terminal traveling wave method, but also overcomes the difficulty in recognizing the traveling-wave head in the single-terminal traveling wave method. Simulation results show that the method is suitable for accurate fault location of hybrid lines with different fault distances, fault types, and grounding resistance.

Key words: fault location, hybrid line, modulus maximum, traveling wave polarity, PSCAD

Shu Tian, Qixiang Yang and Yao Xu. Accurate Ranging of Hybrid Transmission Lines in Distribution Networks [J]. Int J Performability Eng, 2020, 16(11): 1741-1752.

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