Abstract:The harmonic problem is very serious in micro-grid based on distributed generation. It is one of the main ways to solve these problems if inverter has compound functions of voltage harmonics suppression and electrical energy conversion. While, the strategy of frequency divided droop control and the technology of virtual impedance are the key to achieve this goal. But, the current frequency divided droop control strategy cannot achieve power accurate distribution and with poor harmonic suppression effect, and ignored the solution that a new inverter added to the system. Based on this, the public connection point voltage feedback loop was introduced at fundamental and harmonics, avoiding the influence of harmonic suppression when a new inverter added to the system. Finally a novel frequency divided droop controller is proposed. The simulation results show that the method is effective at the improvement of harmonic suppression.