Performance Evaluation of A Combined Positional and Boundary Protection Relay for Transmission Lines

摘要

This paper presents a novel relay for power transmission line systems based on a combination of positional and boundary protection principle and the simulation results to evaluate the relay. The relay installed at a substation is responsible for the protection of all the transmission lines associated with the substation and is able to offer fast trip for any fault on its protected line sections without the need for communication link. The paper presents a description to the basic principles, algorithms and designs of the combined positional and boundary protection relay. Results obtained from simulation studies prove the advantages of the proposed relay.