Optimal Operation of AC/DC Hybrid Micro Grid Considering Night Energy Storage Constraints

With the development of micro grid technology, micro grid energy management system (EMS) has become one of the hot topics. This paper is studied in the Alternating Current/ Direct Current (AC/DC) side operation mode and energy management system of AC / DC hybrid micro grid. On the basement of that the micro grid can be implemented on a variety of control strategies, this paper proposes the operating modes of AC side and DC side of micro grid in different states and the mode interaction of AC/DC side. The energy management system also be discussed in paper, which took the minimization of operate costs as objective function and consider the night constraints of energy storage. An AC / DC hybrid micro grid simulation platform is built in Matlab/Simulink, the validity of seamless handover between micro grid operating modes and the feasibility of micro grid energy management system to ensure optimal operation of micro grid is verified by simulation.