New multi-ended fault-locating method utilizing incremental sequence quantities

Accurate fault location of transmission line faults is crucial to make necessary repairs swiftly and reduce outage time. In this paper, a new multi-ended fault-locating method that uses pure-fault networks and incremental sequence quantities is presented. The proposed method uses time-synchronized voltage and current samples from all remote terminals, which makes this method suitable for integration in line current differential relays. Compared with the traditional multi-ended fault-locating method that solves faulted networks, this method provides better fault location estimates for untransposed lines. This paper demonstrates the accuracy of the proposed pure-fault network method by using simulations and field cases.