A Travelling Wave based Single-Ended Fault Location Using Multi-resolution Morphological Gradient

Accurate identification of fault reflected waves is a big problem of single-ended travelling wave based fault location methods. Regarding wave propagation characteristics, this paper proposes a single-ended fault location approach using multiresolution morphological gradient. Fault branch is determined according to the similarity between the time-frequency energy spectrum of the fault signal and each branch. Then wave propagation information along the line is mapped into energy discontinuity points. The multi-resolution morphological gradient is used to extract the break points in order to identify the fault location. Simulation results demonstrate the feasibility and accuracy of the proposed method.