Open AccessFault location method for transmission grids based on time difference of arrival of wide area travelling wave
Author(s) -
Chen Rui,
Yin Xianggen,
Li Yilin
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8459
Subject(s) - traveling wave , transmission (telecommunications) , arrival time , time of arrival , fault (geology) , computer science , real time computing , telecommunications , seismology , geology , engineering , mathematics , transport engineering , mathematical analysis , wireless
In allusion to fault location failure on wide area travelling‐wave‐based fault location methods caused by the indeterminate shortest transmission path of initial travelling wave and the inaccurate travelling wave velocity, this study proposed a novel fault location method for complex transmission grids based on the time difference of arrival of wide area travelling wave. Firstly, the shortest transmission path in the loop network is determined online by using the time difference of arrival of the initial travelling wave measured at both ends of the fault line. Then, the travelling wave velocity and accurate fault distance are calculated by fusing arrival time of wide area initial travelling waves via the least‐square estimation. The phase current travelling wave is used for the proposed method, and the S transform is used for detecting the arrival time of phase current travelling wave at the Nyquist frequency. The proposed method avoids the phase‐mode transformation and the matching between the actual fault condition and the pre‐determined shortest transmission path. The proposed method can also exactly calculate the fault distance without obtaining the travelling wave velocity. The performance of the proposed method is verified by the power systems computer aided design/electro magnetic transients in DC system (PSCAD/EMTDC) simulation results.