Power Transformer Modeling and Transient Analysis using PSCAD

PSCAD를 이용한 전력용 변압기 모델링과 과도 해석

  • Received : 2016.05.13
  • Accepted : 2016.05.27
  • Published : 2016.06.01


Current differential protection relaying with second harmonic restraint is the main protection for large capacity power transformer. PSCAD simulation program is widely used for modeling of dynamic varying transients phenomena. This paper deals with a power transformer model and transients analysis using PSCAD software to develop IED for power transformer. Simulation was carried out using a three phase 40MVA, 154/22.9kV, 60Hz, two-winding transformer with Y-Y connection used in actual fields. The paper analyzed transformer magnetizing inrush, external fault, and internal fault conditions with this model in the time domain. In addition, we performed an analysis in the frequency domain using FFT during several conditions.


Current differential protection;FFT;Internal fault;Magnetizing inrush;PSCAD;Transients phenomena


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Supported by : ENTEC Co., Ltd.