Laboratory ferroresonance measurements in power transformers


Pejic M., Tokic A., Kasumovic M., Akıncı T. Ç.

ELEKTROTEHNISKI VESTNIK-ELECTROCHEMICAL REVIEW, cilt.84, ss.195-199, 2017 (ESCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 84 Konu: 4
  • Basım Tarihi: 2017
  • Dergi Adı: ELEKTROTEHNISKI VESTNIK-ELECTROCHEMICAL REVIEW
  • Sayfa Sayıları: ss.195-199

Özet

The paper analyzes laboratory ferroresonance measurements taken on an example of a three-phase three-legged power transformer. Ferroresonance occurrs due to a nonlinear inductance, capacitance and periodic voltage source in the network. A transformer becomes ferroresonant during an irregular circuit-breaker operation, when the interaction between the transformer nonlinear magnetizing inductances and phase-to-ground capacitances generate sustained distorted overvoltages. The measurement results and voltage waveforms show the presence of high and sustained ferroresonant overvoltages and a harmonic spectrum containing higher harmonics.