Abstract: In this paper, the distributed power stations are connected to the power grid through the load nodes of the original power grid. According to the average distance of each load node to all generator nodes in the original power grid, two kinds of distributed power plant connection modes are put forward. In the first way, the new joining distributed power plants start from the load node of the minimum average distance to the original generator nodes, and the rest of distributed power plants are connected to load nodes according to the average distance value in ascending order, which is called mode A. In the second way, the new joining distributed power plants start from the load of the maximum average distance from the original generator nodes, and other distributed power plants are connected to load nodes according to the average distance value in descending order, which is called mode B. From the grid statistical characteristics and synchronization dynamics point of view, it is found that the network nodes are more distributed and the synchronizability of the network is better when the distributed power plants are connected to the power grid using mode B. At the same time, the diffusion rate of the grid loss synchronous wave caused by the low power disturbance is slower with mode B when the disturbed node is close to the power stations, which is beneficial to the stable control of the grid. This research has some guiding significance for improving the reliability operation of the power grid when the distributed power stations are connected to the grid.

Key words: the distributed power station connection mode, the shortest distance, synchronization dynamics, complex network