CAJ | 학술논문

为克服三相电压型整流器现有平均模型的局限性,提出并推导一种无须考虑电源接法和性质的统一形式的平均模型.在建立开关模型过程中,处理纯电感割集时对独立状态变量个数以及独立方程数进行了严格界定;推导平均模型时,引入了冗余变量和冗余方程,使得所得模型更加直观易用.模型直接采用电感电流作状态变量,除基尔霍夫电流定律(KCL)和基尔霍夫电压定律(KVL)外,没有依赖任何额外假设.与现有模型相比,该模型去除了对输入三相交流电压波形性质的要求,因此完全适用于非正弦、非平衡、非对称的场合.仿真结果证明了模型的有效性.进一步的讨论说明,在三相正弦输入时,该模型与现有模型兼容.
위극복삼상전압형정류기현유평균모형적국한성,제출병추도일충무수고필전원접법화성질적통일형식적평균모형.재건립개관모형과정중,처리순전감할집시대독립상태변량개수이급독립방정수진행료엄격계정;추도평균모형시,인입료용여변량화용여방정,사득소득모형경가직관역용.모형직접채용전감전류작상태변량,제기이곽부전류정률(KCL)화기이곽부전압정률(KVL)외,몰유의뢰임하액외가설.여현유모형상비,해모형거제료대수입삼상교류전압파형성질적요구,인차완전괄용우비정현、비평형、비대칭적장합.방진결과증명료모형적유효성.진일보적토논설명,재삼상정현수입시,해모형여현유모형겸용.
To remedy the defects possessed by the existing average models of three-phase boost rectifiers,a general-formed model unnecessary to consider connection mode and waveform proper-ties of AC sources is proposed.During establishing the switching model,the numbers of inde-pendent state variables and independent state equations are strictly defined to avoid redundant e-quations as dealing with circuits containing pure inductor cut set.In deriving the average model,the redundant variables and redundant equations are properly introduced to obtain an intuitive model.No extra assumptions are needed except Kirchhoff's current law(KCL)and Kirchhoff's voltage law(KVL).The requirements for waveform properties of three-phase AC voltages are removed,therefore the proposed model is suitable for any input voltage waveforms,regardless whether they are sinusoidal or non-sinusoidal,balanced or unbalanced,symmetrical or asymmetrical.Simulation examples are provided to verify the validity of the model.The further diSCUSsions show that the proposed model is compatible with the existing ones in sinusoidal situa-tions.