【摘要】 针对大功率电力电子变流系统的谐波抑制与无功补偿要求,提出了一类新颖的自耦感应谐波屏蔽变压器及相关的感应滤波技术。分析了由变压器绕组及配套调谐装置所构成的谐波模型,并建立了相应的谐波等效电路模型。在此基础上,通过详细的理论推导阐释了变压器感应滤波技术的工作机理,得出了将谐波屏蔽于变压器二次侧绕组所需要满足的变压器阻抗条件和配套滤波装置的调谐条件。应用灵敏度函数分析了变压器及配套滤波器在谐波频率下所表征出来的阻抗参数对感应滤波效果的影响程度。最后,通过动模试验验证了上述理论分析的正确性,揭示了自耦感应谐波屏蔽变压器所具有的良好的感应滤波效果。更多还原

【Abstract】 According to the demand of harmonic suppression and reactive power compensation for large-power electrical AC/DC power converter systems,this paper presents a kind of new auto-inductive and harmonic-suppression(AIHS) transformer and a corresponding inductive filtering technology.The general model and harmonic model constructed by the transformer windings and the full-tuned circuit at the specific harmonic frequencies are proposed,and the harmonic equivalent circuit model is established.Based on this,the filtering mechanism of the new inductive filtering technology is revealed,and the necessary impedance condition for the new transformer and the tuned condition for the full-tuned circuit to suppress the main harmonic currents in the secondary windings are obtained.The analytical method of the sensitivity function is applied to analyze the influence of the impedance parameters on the inductive filtering effect.Finally,the test results verify the correctness of theoretical analysis,and present the good inductive filtering performance that the new transformer has.更多还原