城市微电网柔性直流互联方法以提升自然灾害下的供电能力

How to achieve urban power restoration with the help of microgrid (MG) in the face of natural disasters has become a research hotspot. This paper aims to research a flexible interconnection method to enhance power supply capacity. First, a flexible DC interconnection method covering a large spatial area is proposed. Then, based on a modular modeling method for high-order systems considering interaction characteristics of Voltage Source Converter (VSC) ports, an interconnection selection method is built to compare the power supply performance of system under star structure and hand-in-hand structure. Furthermore, a dynamic adjustment strategy based on control mode is formed. Finally, the corresponding simulation and experimental verification shows that the proposed method is able to obtain optimal structure and master station to get the maximum power supply capability, while still ensuring high reliability in the face of secondary disasters.