Online fault location of 110kV hybrid cable line by traveling wave based on Short-Time Matrix Pencil Method

Abstract

In this paper,an online cable fault location method based on Short-Time Matrix Pencil Method is proposed. In the 110kV cross-bonded cable hybrid line with GIS, the method does not need to disassemble the GIS of the cable terminal, and extracts the transient current traveling wave from the sheath ground wire of the cable ends. The Short-Time Matrix Pencil Method is used to extract the signal abrupt point in the current traveling wave caused by the short-circuit fault occurs in the line, and achieves the purpose of fault location. The cable system model is established in PSCAD to simulate different fault types and distances. Compared with the commonly used wavelet analysis method, the results show that the method has higher feasibility and accuracy.