A FUZZY LOGIC-BASED LONG DISTANCE HIGH TENSION POWER SYSTEM PROTECTION SCHEME

Authors

  • SAMUEL N. NDUBUISI Electrical and Electronic Engineering Department, State University of Science and Technology, Enugu, Nigeria. Author
  • GODWIN U. OMINI New Haven Transmission Substation, Enugu Power Holding Company of Nigeria Plc, Enugu. Author

Keywords:

Fuzzy-set, Fuzzy rules, Expert system, Artificial neural network, Genetic algorithm, Evolutional computing

Abstract

Some times circuit breakers, which respond to relaying logic protect transmission lines, trip falsely. Part of the problem may be due to incorrect operation often associated with conventional protection schemes. In this paper, a fuzzy logic based distance protection scheme has been developed. The approach needs only the line impedance to formulate rules, which are simulation using fuzzy logic toolbox in MATLAB. The proposed fuzzy-set approach is well suited for the development of a strategy for tripping line breakers correctly, in an event of fault occurring. The result of simulation shows that the scheme can take care of the vagueness between time settings of one protective zone from the other during fault conditions. The sensitivity of the relay tripping can also be observed.

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Published

2008-06-30

Issue

Vol. 43 No. 2 (2008): NSE TECHNICAL TRANSACTION JOURNAL (NSE TT-J)

Section

Articles