Phase lead correction for VSI single-loop control

Voltage Source Inverters (VSIs) generally use the multi-loop control strategy, while single-loop control strategy has been proposed. In order to maintain low total harmonic distortion content in the output voltage, resonant controllers with parallel structure have also been commonly adopted. Firstly, the parameter design problems for the parallel resonant controllers are discussed. On this basis, a novel single-loop control strategy based on phase-lead correction is proposed. It can simplify the control parameters design process, and improve the performance of VSIs. The experimental results prove the validity of proposed control strategy.