Method for estimation of location of the asymmetrical phase‐to‐ground faults existing during an overhead line energisation.

Fast and precise location of faults in power transmission lines is essentially important for fast line restoration. Widely used fault location methods based on impedance measurement and travelling wave analysis have some drawbacks leaving a lot of room for further research. This study proposes a novel method for estimation of the location of the asymmetrical phase‐to‐ground faults that exist during line energisation. The method is based on the empirical mode decomposition and its application relies on knowing the fundamental system parameters and frequency estimation of the analysed signal. It is simple to use while providing highly accurate results for overhead lines up to 80 km length. [ABSTRACT FROM AUTHOR]