Fast response low harmonic distortion control scheme for voltage source inverters

A fast response low harmonic distortion control scheme is proposed that combines the useful features of the sliding mode control and the repetitive control to achieve excellent transient and steady-state system performances in voltage source inverters. The principle of s domain equivalent control is adopted to integrate the two methodologies and to facilitate the design and analysis of the proposed scheme. An optional specific low-pass filter can be introduced into the system to improve the transient response of the regulation. Experimental results show that fast dynamic responses are achieved through the sliding mode control, whereas low harmonic distortions are achieved through the repetitive control.