Research on an Improved Control Strategy of Inverter Based on the Droop Control

The micro-grid inverter control strategy is analyzed,including the core strategy,droop control.The droop control based on virtual impedance is proposed,and the droop control equations are derived under resistive and inductive load.The inherent limitations of the conventional droop control are analyzed,and figure out the traditional droop control cannot realize reactive power sharing under the different impedance.To achieve accurate proportional load sharing,an improved droop control based on virtual synchronous motor is introduced.And also the control can make the output voltage more stable.At last,both Matlab/Simulink simulation and experimental results verify the validity and feasibility of the control scheme.