INTELLIGENT AGENT BASED LONG DISTANCE TRANSMISSION LINE PROTECTION SCHEME FOR 300KV LINE IN NIGERIA

Abstract

Most often circuit breakers which to relaying logic to protect transmission lines, trip falsely. Part of the problem may be due to incorrect relay operation sometimes associated with conventional classical-logic based protection schemes. In this paper an intelligence based protection scheme on fuzzy logic been develop. This approach is motivated by the fact that input impedance to which distance relays respond may not always be very clear and distinct. The technique cases the line operational data, fault impedance and experiences of the line operators to formulate fuzzy rules, which are their formulated, using logic toolbox in MATLAB. The proposed fuzzy set approach is well suited for the development of a strategy for tripping the breaker correctly, in an event a fault occurs.