BEHROOZ SHEYKHLOEI

  Abstract :

  The main purpose of this research is introducing an effective technique for determination of fault location of overhead lines. The proposed method is based on the frequency and time decomposition of voltage signals that traveling waves theory and wavelet transform are used. Application of CVT for providing data samples of transient voltages is another subject that is mentioned. Two significant methods wich have been broadly classified are:

  1)frequency approach has very complicated transmission line equation, and Selection of logic answers are very difficult for them.

  2) High frequency Traveling wave approach) has very rapid responses, with enough accuracy, though it has inherent problems. In this research EMTP/ATP for overhead line simulation and MATLAB capability for signal analyses are used. At the end of the thesis a useful algorithm for fault location is described and defined. Comparison of estimated results of this algorithm, different types and resistance faults, and real locations is accurate and acceptable. Reducing errors and costs because of measurement devices reduction, is another advantage of this method.

  Defense Date: Monday 5 July 2010 Tim: 8.30-10.30

  Location :Electrical Engineering Department