An Efficient Algorithm for Fault Location on Mixed Line-Cable Transmission Corridors

This paper presents a fault location algorithm that can be used to accurately locate the fault at any place along mixed line-cable transmission corridors. The algorithm is an impedance based line/cable parameter dependent algorithm. The fault location algorithm is derived using distributed line model, modal transformation theory and Discrete Fourier Transform. The algorithm can be used as an on-line, or off-line application in practice. The proposed solution has the ability to locate the fault whether it is on the overhead line or on the underground power cable. The paper presents the results of the initial algorithm testing through the use of ATP simulations. Some results are validated by experimental measurements