Line impedance measure method for microgrid

Power sharing between inverters, microgrid modeling and stability analysis are hot research fields in microgrid research. Line impendence is an important parameter to improve accuracy of the power sharing and to improve the accuracy of the model of the microgrid system. Line impedance measure methods have been discussed in several papers. This paper summarized and analyzed each of these methods, identified their advantages and weaknesses, then described a method based on power variation to measure the line impedance in microgrid. Simulation results reveal the correctness and good accuracy of the proposed method.