Institute of Energy Systems Energy Efficiency and Energy Economics TU Dortmund University Dortmund 44227 Germany;
College of Electrical and Information Engineering Hunan University Changsha 410082 China;
College of Electrical and Information Engineering Hunan University Changsha 410082 China;
Institute of Energy Systems Energy Efficiency and Energy Economics TU Dortmund University Dortmund 44227 Germany;
College of Electrical and Information Engineering Hunan University Changsha 410082 China;
College of Electrical Engineering Zhejiang University Hangzhou 310027 China;
DC microgrid; dynamic characteristic; virtual inertia; small-signal model;