CAJ | 학술논문

首先分析了国内外现有变压器谐波模型发展情况及其适用范围的局限性，进而提出利用 Jiles-Atherton 磁滞模型表征铁心的非线性，通过 Jiles-Atherton 磁滞模型拟合函数计算励磁电流。在此基础上，综合考虑谐波情况下集肤效应、邻近效应对绕组的影响，考虑三相变压器相与相之间、原边与副边之间的互感，提出了一种新型的时频域结合的三相变压器谐波模型，该模型具有良好的收敛速度。最后，利用该模型对电力变压器的谐波损耗进行仿真和实验研究，证明了模型的有效性和实用性。
수선분석료국내외현유변압기해파모형발전정황급기괄용범위적국한성，진이제출이용 Jiles-Atherton 자체모형표정철심적비선성，통과 Jiles-Atherton 자체모형의합함수계산려자전류。재차기출상，종합고필해파정황하집부효응、린근효응대요조적영향，고필삼상변압기상여상지간、원변여부변지간적호감，제출료일충신형적시빈역결합적삼상변압기해파모형，해모형구유량호적수렴속도。최후，이용해모형대전력변압기적해파손모진행방진화실험연구，증명료모형적유효성화실용성。
Firstly the development of existing harmonic models for the power transformer home and abroad as well as the limitation of their applicable scope are analyzed, and then it is proposed that the nonlinearity of iron core is characterized by Jiles-Atherton hysteresis model, and the excitation current is calculated by the function fitted by Jiles-Atherton hysteresis model. On this basis, synthetically considering the impacts of the skin-effect and the proximity effect on transformer windings under harmonics and taking the mutual inductance among phases of three-phase power transformer as well as that between primary winding and secondary winding in each phase into account, based on the combination of time-domain with frequency domain a novel harmonic model for three-phase power transformer, which possesses satisfied convergence performance, is proposed. Finally, using the proposed model, the experimental and simulative researches on harmonic losses in power transformer are performed, and research results show that the proposed model is effective and practicable.