Make full use of the rich and relatively stable solar energy resources in desert areas to build large-scale photovoltaic power stations, and connect to high-voltage transmission systems to supply long-distance loads. The site selection is more flexible, the stability is increased, and the positive peak-shaving characteristics of solar radiation and power load can be fully utilized to play a role in peak shaving. The operation mode is relatively flexible. Compared with distributed photovoltaics, it is more convenient to perform reactive power and voltage control, and it is also easier to participate in grid frequency regulation. The construction period is short, the environmental adaptability is strong, the operating cost is low, it is easy to centrally manage, and it is less restricted by space, so it can be easily expanded.