Modelling and identifying of transformer faults

Ozgonenel O., Thomas D., Christopoulos C.

2005 IEEE Russia Power Tech, PowerTech, St. Petersburg, Russia, 27 - 30 June 2005 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/ptc.2005.4524425
  • City: St. Petersburg
  • Country: Russia
  • Keywords: DWT, TLM, Transformer internal faults
  • Ondokuz Mayıs University Affiliated: No

Abstract

This paper introduces a novel modelling and identifying technique for the transformer internal faults. Transmission line method (TLM) is used for the modelling transformer internal faults with a linear and non-linear inductor model. Discrete wavelet transform (DWT) is used for identifying fault currents. The proposed techniques are simple to implement and provides a reliable and computationally efficient tool. Results for a range of simulated faults are used to compare the efficiency of DWT with conventional Fouier Transforms. It is shown that it provides a more reliable fault discrimination algorithm than conventional methods.