Analysis of the DC Bias Phenomenon by the Harmonic Balance Finite-Element Method

作者：Zhao Xiaojun^*; Lu Junwei; Li Lin; Cheng Zhiguang; Lu Tiebing

来源：IEEE Transactions on Power Delivery, 2011, 26(1): 475-485.

DOI：10.1109/TPWRD.2010.2056709

• DC bias
• harmonic domain
• harmonic-balance finite-element method (HBFEM)
• magnetic induction

An Epstein frame-like core model is set up to study the dc-biased problem of the power transformer. The harmonic phenomenon of the model under the dc bias condition is investigated by using the harmonic-balance finite-element method (HBFEM). The harmonic-balance finite element equation is coupled with the external electric circuit. Each harmonic component of the magnetizing current and magnetic field can be calculated directly in the harmonic frequency domains. Comparing the calculated results with the experimental data shows consistency. The dc bias effects on the magnetizing current and the magnetic induction are analyzed through the harmonic solutions.

• 出版日期2011-1
• 单位华北电力大学