Layout Planning of Medium-voltage Switching Station Based on Demand-side Grid Division

Grid division can transform a complex physical model into several simple entities, and is an effective method for power distribution system planning and the whole process management. It also provides a new perspective for the optimal layout planning of switching stations as well as the development of computer-aided planning software packages. This paper first defines the demand grid for low-voltage electricity access demand. Then, an optimization model of switching station layout planning based on grid division is proposed, with the objectives of maximizing the average equipment utilization rate and minimizing the total number of switching stations, and with five constraints including the block boundary, crossing, power supply radius, planned capacity of the site, and the maximum load rate of the equipment. Besides, this paper further describes the algorithm flowchart developed based on this method and the application in the layout planning of actual medium-voltage switchyards.