Abstract: Voltage Source Inverters（VSI） commonly use the double loop control strategy,while new single loop control strategies have been proposed.In order to suppress the low-order harmonics,parallel resonant controllers are also introduced.This paper firstly makes a comparison of single loop and double loop control strategies,as viewed from transfer functions,and concludes that these two control strategies have almost the same dynamic response under low switching frequencies.Then deep analysis is carried out on problems existing in the present parallel resonant controllers design.On this basis,a novel single loop control strategy based on phase lead correction is proposed.It can simplify the control parameters designing,and dramatically improves the performance of VSI by adjusting the magnitude-phase characteristics of the controlled object.The analysis and experimental results show that the novel single-loop controller maintains low total harmonic distortion content and fast transient response.