An Enhanced Parameter-Free Fault Locator for Untransposed Line With Unsynchronized Terminals

This letter presents a novel fault location algorithm for single circuit untransposed line, which is independent of transmission line parameters and unsynchronized measurement. The novelty of proposed algorithm is that it considers asymmetry in untransposed line while considering unequal angles of synchronism mismatch in pre-fault and fault conditions. Thus, in contrast to existing techniques the proposed algorithm can be applied to conductor configuration other than delta/flat configuration of untransposed line. Simulation results using EMTP-RV platform along with those obtained using field data are presented. The test results verify the accuracy and validity of the proposed method.