The paper presents a method to determine equivalent DC impedance and equivalent AC impedance of HVDC converter viewed respectively from DC side and AC side based on switching function theory.

文中提出了基于开关函数理论的HVDC换流器直流等值阻抗和交流等值阻抗计算方法。

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A proper integral filter is designed to parallel with the Fourier system Thus the influence of DC offset on impedance calculation is cancelled.

傅里叶系统并联一个适当的积分滤波器以后可以消除非周期分量对阻抗计算的影响。

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Because the clamp effect of DC voltage source, AC side output the rectangular wave voltage waveform, and it has nothing to do with the load impedance Angle.

由于直流电压源的钳位作用，交流侧输出电压波形为矩形波，并且与负载阻抗角无关。

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