Introduction
As a novel and adaptable energy infrastructure, microgrids can collaborate with photovoltaic systems, wind turbines, and other renewable energy sources as well as energy storage devices. Additionally, they enable bidirectional power flow with the main grid, which has increasingly become a focal point of academic research [1]. A microgrid operating in island can effectively integrate resources, provide continuous and reliable power supply for critical loads, and enhance the power quality of local users [2]. Therefore, it is very important to ensure the stability of three-phase inverter system in island mode [3]. Modeling and stability analysis of Three-Phase Off-Grid Inverter (TPOI) are of important sense.