CAJ | 학술논문

建立了一种新的直流偏磁下三相变压器组的传输线模型.模型中,将变压器电路中的微分项离散,并应用 Jiles-Atherton铁磁磁滞理论来描述铁芯的饱和以及磁滞效应.涡流损耗用含等值电阻的附加绕组替代,同时考虑绕组铜耗及漏磁等因素,从而使变压器模型得到充分完整的描述.最后利用牛顿-拉夫逊迭代方法,对直流偏磁下的三相变压器组进行了时域仿真计算,仿真结果证明所提出的计算模型能够准确的分析三相变压器组的直流偏磁现象.
건립료일충신적직류편자하삼상변압기조적전수선모형.모형중,장변압기전로중적미분항리산,병응용 Jiles-Atherton철자자체이론래묘술철심적포화이급자체효응.와류손모용함등치전조적부가요조체대,동시고필요조동모급루자등인소,종이사변압기모형득도충분완정적묘술.최후이용우돈-랍부손질대방법,대직류편자하적삼상변압기조진행료시역방진계산,방진결과증명소제출적계산모형능구준학적분석삼상변압기조적직류편자현상.
This paper proposes a novel transmission-line model (TLM) of three-phase transformer under DC bias. In the model, the differential terms in transformer circuit are discrete. The saturation characteristic and hysteresis effect are described on the basis of Jiles-Atherton ferromagnetic hysteresis theory, and the eddy-current losses resulting from the flux paths through legs are replaced by an equivalent resistance. Furthermore, the copper losses and leakage inductance of the primary and secondary windings are also included. At last, the Newton-Raphson technique is chosen to calculate the model. The results demonstrate the validity of the math models in analyzing the DC bias phenomenon of the three-phase transformer.