一种基于小交流信号注入的孤岛微电网不平衡与谐波功率分配自适应虚拟阻抗控制方案

To address the unbalanced and harmonic power sharing issue among parallel inverters caused by feeder impedance mismatch in islanded microgrids, an adaptive virtual impedance control method is proposed based on the injection of an extra small ac signal (SACS) in the output voltage of each inverter. Similar to the principle of active power-frequency droop, the frequency of the injected signal droops...