The Physical Simulation System Design Based On AC/DC Hybrid Microgrid

The regular energy sources, such as coal and oil, have caused global energy shortage and environmental degradation, and grid connected power generation technology based on renewable energy is one of the effective ways to solve the above problems.Themicrogrid form of wind power, photovoltaic distributed power generation unit is connected to the main network, give full play to its own characteristics for new energy has obvious advantages. According to the future trend of AC / DC power supply system,design a physical simulation system of DC micro grid, including the overall design of the system, selected the distributed simulation source, energy scheduling strategy research and design. According to the future trend of AC / DC power supply system, design a physical simulation system of DC micro grid, including the overall design of the system,selected the distributed simulation source, energy scheduling strategy research and design.And the actual simulation of the converter is carried out. This paper is divided into the following three parts to carry out research:(1) The micro grid system design, proposed the AC side and DC side voltage level,and the construction of the multi-source coordination, AC / DC hybrid multi energy complementary micro grid, not only covers the typical wind, solar system, at the same time increase and develop a wave power generation system, fuel cell system, a hybrid energy storage system capacity etc., greatly enriched the type of energy system.(2) Back-to-back converter of wind within the system were optimized, comparing the commonly used wind power converter node topology structure, choose the back-to-back PWM converter as the research object; the design of the direct drive wind power converter topology, and increases the DC side unloading unit.(3) AC-DC hybrid microgrid coordinated control strategy is proposed based on the detailed structure of the energy management, design the flow chart of the software operation, software control logic, how to coordinate and control all kinds of energy.Micro grid energy coordination based on the design of power regulation when opening sequence.