配电网作为电能从生产到用户的最后环节，在电力系统中扮演着极为重要的角色

As the last link of electrical energy from production to users, distribution network plays an extremely important role in the power system. Efficient consumption of various distributed energy sources, flexible access to electric vehicles, and high-quality service and flexible interaction on the user side all need to be completed through the distribution network. At the same time, high attention to energy and environment makes the development of distribution networks face new pressures and challenges. In the smart distribution network, the network structure and operation mode are more flexible and changeable. Advanced distribution automation technology and advanced information and communication technology are widely used. Distributed power, energy storage, and demand-side resources have begun to participate in the optimization of the distribution network. With control. The development of smart distribution grids and the widespread application of new energy generation technologies are driving changes in the distribution and usage models and operation management mechanisms. <br>Flexible multi-state switch (FDS) is a new type of power electronic device with high operational flexibility, which can effectively solve many problems caused by the high permeability of intermittent DG. It can accurately control the power of the feeder connected to it. The access of FDS improves the flexibility and controllability of the distribution network and brings many benefits to the operation of the distribution network. <br>This article will explain the performance of FDS in the distribution network through the intelligent distribution network demonstration project with flexible multi-state switches in Foshan, Guangdong, and put forward suggestions for FDS promotion and application.

As the last link of electric power from production to user, distribution network plays an important role in power system. Efficient energy dissipation of all kinds of distributed energy, flexible access to electric vehicles, and user-side quality service and flexible interaction all need to be done through the distribution network. At the same time, the high attention to energy and environment makes the development of distribution network face new pressures and challenges. In the smart distribution network, the network structure and operation mode are more flexible, advanced power distribution automation technology, advanced information and communication technology can be widely used, distributed power supply, energy storage, demand side resources, etc. began to participate in the optimization and control of distribution network. The development of smart distribution network and the wide application of new energy generation technology are driving the change of distribution mode and operation management mechanism.<br>Flexible multi-state switch (FDS) is a new type of power electronic equipment with high operating flexibility, which can effectively solve many problems caused by the high permeability of intermittent DG. It can accurately control the power of its connected feeder, and The access of FDS improves the flexibility and controllability of the distribution network, which brings many benefits to the operation of the distribution network.<br>This paper will explain the performance of FDS in the distribution network through the smart distribution network demonstration project with flexible multi-state switch in Foshan, Guangdong Province, and put forward the suggestion of FDS promotion and application.

As the last link of electric energy from production to users, distribution network plays an extremely important role in the power system. The efficient consumption of various distributed energy, the flexible access of electric vehicles, and the high-quality service and flexible interaction on the user side need to be completed through the distribution network. At the same time, the high attention to energy and environment makes the development of distribution network face new pressure and challenges. In the intelligent distribution network, the network structure and operation mode are more flexible, advanced distribution automation technology and advanced information communication technology are widely used, and distributed power, energy storage and demand side resources are beginning to participate in the optimization and control of the distribution network. The development of intelligent distribution network and the wide application of new energy generation technology are promoting the transformation of distribution mode and operation management mechanism.<br>Flexible multi state switch (FDS) is a new type of power electronic equipment with high operating flexibility, which can effectively solve many problems caused by the high permeability of intermittent dg. It can accurately control the power of its connected feeders. The access of FDS improves the flexibility and controllability of the distribution network, and brings many benefits to the operation of the distribution network.<br>In this paper, through the demonstration project of intelligent distribution network with flexible multi state switch in Foshan, Guangdong Province, the performance of FDS in distribution network will be described, and suggestions on the promotion and application of FDS will be put forward.<br>