Stochastic Correlation Estimator Fault Location Method on Lossy Transmission Lines with Multi Uncertain Parameters

A power transmission system is the backbone of Energy Internet and its importance in maintaining reliability cannot be ignored. The transmission lines are prone to electrical faults hence an intelligent and accurate fault localization method is necessary. One of the major challenges in locating a fault is the uncertainty associated with transmission line parameters. Recently, stochastic correlation estimator method has been reported to tackle the parameter uncertainty in univariate model of transmission system. However, this method has never been applied to a multivariate problem yet. This paper proposes a stochastic correlation estimator based fault location method for lossy transmission lines with multiple uncertain parameters. Simulation was carried out on a single conductor overhead 50 km transmission line with height and ground resistivity as random parameters. The results show that the actual fault position is within an estimated confidence fault interval even for multivariate uncertainty problem.