In the parallel operation system of low-voltage microgrid inverters,the equivalent output impedance of inverters is generally resistive or inductive.The conventional droop control method will couple the power and make it difficult to dis-tribute the reactive power reasonably.In order to solve this problem,a virtual impedance-based power droop control strat-egy was proposed.By adjusting the equivalent output impedance of the inverter to be inductive,the power decoupling con-trol was realized,which was adequate for droop control and improved the voltage drop during load switching.The parallel operation system of two inverters was built in MATLAB/Simulink for simulation.The results showed that the strategy realized the reasonable distribution of power and exhibited good dynamic performance.
关键词
逆变器/下垂控制/虚拟阻抗/电压跌落
Key words
inverter/droop control/virtual impedance/voltage drop
维普
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