Enhanced Fault Location Algorithm for Short Faults of Transmission Line

- Journal title : The Transactions of The Korean Institute of Electrical Engineers
- Volume 65, Issue 6, 2016, pp.955-961
- Publisher : The Korean Institute of Electrical Engineers
- DOI : 10.5370/KIEE.2016.65.6.955

Title & Authors

Enhanced Fault Location Algorithm for Short Faults of Transmission Line

Lee, Kyung-Min; Park, Chul-Won;

Lee, Kyung-Min; Park, Chul-Won;

Abstract

Fault location estimation is an important element for rapid recovery of power system when fault occur in transmission line. In order to calculate line impedance, most of fault location algorithm uses by measuring relaying waveform using DFT. So if there is a calculation error due to the influence of phasor by DC offset component, due to large vibration by line impedance computation, abnormal and non-operation of fault locator can be issue. It is very important to implement the robust fault location algorithm that is not affected by DC offset component. This paper describes an enhanced fault location algorithm based on the DC offset elimination filter to minimize the effects of DC offset on a long transmission line. The proposed DC offset elimination filter has not need any erstwhile information. The phase angle delay of the proposed DC offset filter did not occurred and the gain error was not found. The enhanced fault location algorithm uses DFT filter as well as the proposed DC offset filter. The behavior of the proposed fault location algorithm using off-line simulation has been verified by data about several fault conditions generated by the ATP simulation program.

Keywords

ATP;DC offset component;DC offset elimination filter;DFT;Fault location estimation;Line impedance;Phasor;Relaying signal;Transmission line;

Language

Korean

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