A PRACTICAL APPROACH TO ACCURATE FAULT LOCATION ON EXTRA-HIGH-VOLTAGE TEED FEEDERS

This paper describes the basis of an alternative approach for accurately locating faults on teed feeders and the technique developed utilises fault voltages and currents at all three ends. The method is virtually independent of fault resistance and largely insensitive to variations in source impedance, teed and line configurations, including line untransposition. The paper presents the basic theory of the technique which is then extensively tested using simulated primary system voltage and current waveforms which in turn include the transducer/hardware errors encountered in practice. The performance clearly shows a high degree of accuracy attained.