Research and application of low-voltage flexible interconnection technology of distribution network

The explosive growth of DC source loads such as charging piles has created serious challenges to the load capacity and voltage safety of the existing distribution network, the flexible interconnection of low-voltage DC in multiple areas of the distribution network can realize the resource sharing and coordinated control of multiple areas or areas of the distribution network, and is an effective technical means to solve the above problems without the capacity expansion and transformation of the distribution network. This paper analyzes the application scenarios, system design, coordinated control, and overall scheme of the distribution network flexible interconnection system, and sorts out and summarizes the key technologies and core equipment of the distribution network low-voltage DC flexible interconnection system, and prospected the future development of low-voltage DC distribution network, and finally, the flexible platform project of Nanjing Lukou Airport New City and the results of the joint commissioning experiment are introduced.