College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China

The low-voltage flexible interconnection technologies based on soft open point (SOP) can realize the power mutual exchange and flexible transfer between station areas, so as to improve the load carrying capability and the accommodation capability of distributed generation. However, due to the periodic change of the power, the current fixed flexible interconnection scheme only has an obvious effect in some periods, resulting in a low utilization rate of flexible interconnection equipment in station areas. In order to solve the above problems, the flexible interconnection concept of mobile soft open point (MSOP) is put forward. Firstly, based on the engineering experience, the challenges faced by the existing low-voltage flexible interconnection technologies are summarized, and the feasibility of the mobile flexible interconnection in the low-voltage station areas is analyzed from the aspects of the construction conditions and the volume, weight and loop closing or opening strategy of SOP equipment. Secondly, the cost-benefit model of the low-voltage mobile flexible interconnection is established, the influence of relocation distance and times on mobile flexible interconnection is analyzed, and the critical conditions of mobile flexible interconnection are discussed. On this basis, the application scenarios of mobile flexible interconnection are summarized. Finally, the potential research directions of MSOP in the field of flexible interconnection of low-voltage distribution network are prospected.