Maximum Overlap Discrete Wavelet Based Transformer Differential Protection

Özgönenel O., Karagol S.

25th Signal Processing and Communications Applications Conference (SIU), Antalya, Türkiye, 15 - 18 Mayıs 2017 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/siu.2017.7960187
  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Anahtar Kelimeler: Transformer protection, DWT, MODWT, differential protection
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this paper, a wavelet based power transformer protection algorithm, which is one of the most important components of power system, is proposed. Traditionally, power transformers (rated power greater than 1.5MVA) are protected by differential protection scheme. Its function supported by discrete Fourier transform is fundamentally based on comparison of primary and secondary currents of the transformer and dedicated to discriminate internal faults and magnetizing inrush phenomena. In this way, the relay (differential protection relay) is ensured to be more reliable and selective. Nevertheless, the concept of transformer protection has been keeping up-to-date and several numerical protection algorithms have been suggested for this purpose.