Development of a new fault location algorithm for multi-terminal two parallel transmission lines

• Published in: Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference pp. 348 - 362
• Main Authors: Nagasawa, T., Abe, M., Otsuzuki, N., Emura, T., Jikihara, Y., Takeuchi, M.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1991
• Subjects: Electrical fault detection; Fault detection; Fault location; Power transmission lines; Protective relaying; Pulse measurements; Surge protection; Transmission line measurements; Transmission lines; Voltage
• ISBN: 9780780302198; 0780302192
• DOI: 10.1109/TDC.1991.169531

Conventional fault location methods using one-terminal AC voltage and current are not applicable to multi-terminal systems. A new fault location algorithm for multi-terminal two parallel transmission lines is described. This method uses the magnitude of the differential currents at each terminal and also uses an algorithm based on a 3-terminal fault location algorithm and an equivalent conversion from an n-terminal to a 3-terminal system. For a multi-fault occurring at the same place and same time on both lines as well as a single-fault this new algorithm is reasonably accurate. EMTP simulation results are shown.< >