Abstract—A more stable grid is achieved by storage systems, with Alternating Current (AC) microgrids providing more continuous grid operation by supplying energy to electrical loads from distributed energy sources and energy sources from the old distribution grid. The article provides specific content of a three-port converter that connects distributed energy sources (renewable energy sources), storage systems to the AC microgrid. The converter uses Direct Current (DC) Sinusoidal Pulse-Width Modulation (SPWM) with the design foundation of Direct Current/Direct Current (DC/DC) energy converters such as H-bridge and Buck-Boost. It aims to realize the operation of a microgrid system that provides more continuous and stable power to the system when operating independently and connected to the main grid. The results of the whole project are verified by simulation and experiment with the power value of 2-5.5kW achieving an average efficiency of each case together close to 97% and are compared with some reference documents.