This paper presents the development and implementation of algorithms for fault location in multi-terminal transmission lines. The proposed fault location system is capable of correctly identifying the fault point based on voltage and current phase components, calculated using measurements of voltage and current signals from intelligent electronic devices, located on the transmission line terminals. The algorithms, which are parte of the system, have access to the electrical parameters of the transmission lines and to information about the transformers loading and their connection type. This work also presents the development of phase component models for the power system elements used by the fault location algorithms.
Fault location; Power transmission lines; Substations
