Parallel Control Strategy of Multiple Inverters Based on Improved Droop
In view of such problems as not consideration the influence of line impedance of the line under the traditional decoupling droop control strategy,the uneven reactive power distribution and circulating current of multiple inverters in parallel operation in the case of isolated island operation of micro grid,a kind of improved droop control strategy based on adaptive voltage compensation is proposed in this paper. Firstly,aiming at the voltage drop caused by different line impedance,the line voltage drop compensation link is added. On this basis,considering the consistency between the voltage at the outlet of the inverter and the bus voltage,the droop control type is improved,the output power information of each inverter is obtained by using low bandwidth communication technology,and the adaptive voltage compensation link is introduced to improve the accuracy of reactive power sharing between inverters. Finally,the simulation model of the proposed control strategy is set up based on Matlab platform,and the the correctness and effectiveness of the proposed control strategy is verified.
万方数据
维普
