Evaluation of DG bearing ratio of distribution networks with flexible interconnection of medium and low voltage levels

With the widespread access of distributed power sources, flexible distribution network technology is an important solution to the volatility of distributed energy. Firstly, considering the operating constraints of soft open point (SOP) and AC distribution network, based on the time-series production model, the distributed energy carrying capacity operation optimization model of medium and low voltage flexible interconnected distribution network is presented. Then the efficient cone programming algorithm is used to solve and obtain the optimal power flow. Finally, based on the example of low and medium voltage flexible interconnection system, the distributed energy bearing ratio is evaluated. The results showed that flexible interconnection can improve the bearing ratio of distributed energy, and the access location of distributed energy also has a significant impact on its bearing ratio.