CAJ | 학술논문

变压器瞬时电感参数计算是备受关注的研究内容。本文结合变压器直流偏磁问题，基于能量平衡原理计算动态电感。建立变压器电磁耦合模型，求解时变非线性磁场，利用局部线性化方法获取系统能量，从而计算动态电感；通过电路求解时域电流，并回馈磁场实现耦合。在此基础上模拟变压器直流偏磁电磁特性，分析在不同直流扰动下动态电感与非线性励磁的对应关系，并总结其规律。搭建实验平台，对比实测数据与计算结果，验证本文所采用方法的准确性。
변압기순시전감삼수계산시비수관주적연구내용。본문결합변압기직류편자문제，기우능량평형원리계산동태전감。건립변압기전자우합모형，구해시변비선성자장，이용국부선성화방법획취계통능량，종이계산동태전감；통과전로구해시역전류，병회궤자장실현우합。재차기출상모의변압기직류편자전자특성，분석재불동직류우동하동태전감여비선성려자적대응관계，병총결기규률。탑건실험평태，대비실측수거여계산결과，험증본문소채용방법적준학성。
Computation of the instant inductance in transformer is concerned as a hot topic. Considering the DC?bi?asing problem, the dynamic inductance of transformer is computed based on the energy?balanced principle. The e?lectromagnetic coupled model is built. And the time?varying electromagnetic computation of transformer is decom?posed into nonlinear magnetic and time?domain circuit. The dynamic inductance can be calculated from the system energy by magnetic solving, while the time?domain current is computed by iteration of electrical circuit. By this method, the electromagnetic characteristics of DC?biased transformer are simulated. The relationship between dy?namic inductance and nonlinear excitation is analyzed under different DC disturbances. Experiment is carried out to measure the parameters. Comparing the computed results with the experimental data shows consistency. And the proposed method is valid for the related analysis for electromagnetic devices such as transformer.