A method for suppressing secondary voltage ripple of a dc side of an inverter

Abstract

The application relates to a method for suppressing secondary voltage ripple of an inverter DC side. The method comprises the following steps: obtaining a voltage error signal between a DC bus voltage signal and a preset voltage signal; determining a base frequency orthogonal component signal corresponding to the voltage error signal according to the voltage error signal, and generating an AC reference signal according to the base frequency orthogonal component signal; generating a current inner loop reference signal according to the AC reference signal; and the current inner loop reference signal is used for suppressing secondary voltage ripple in the DC bus voltage signal. The method can effectively suppress the secondary voltage ripple of the inverter DC side.

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