Abstract: After experiencing unprecedented rapid development, new energy projects represented by wind and solar power have gradually emerged as wind and solar complementary comprehensive power plants, influenced by factors such as grid electricity pricing policies, power grid construction, government policies, and construction land. The wind and solar complementary power generation system fully utilizes the complementary advantages of wind and light resources to achieve maximum integration of resources, forming a complementary new energy source. Wind and solar complementary stations generally connect wind farms to the grid first, and photovoltaic power stations are connected to the low-voltage side busbar of the main transformer of the wind farm. The wind farm and photovoltaic power station belong to two independent dispatch stations. This article introduces how to set the most economical and reliable control strategy for wind and light complementary stations while maintaining their respective grid connection voltage to meet the requirements of dispatching voltage qualification rate。