Study on Complementation Characteristics of Wind-solar-water Complementation System Based on Small Hydropower Station
For the grid-connected wind-solar-water complementary power generation system,the wind power sub-system,photovoltaic power generation subsystem and hydroelectric power generation subsystem with complementary characteristics are established when the system load is assigned.According to the characteristics of power supply,the wind-solar-water cooperative control strategy is proposed,and the characteristics of wind-solar-water comple-mentary power generation are analyzed.By defining the peak load capacity ratio of the system,the complementary characteristics of the system are analyzed.The results show that compared with a single power generation subsystem,using grid-connected wind-solar-water complementary power generation system,the peak load capacity is greatly reduced,and the peak load capacity ratio is less than 50%throughout the year,which indicates that the complemen-tary system can solve the fluctuation of hydropower,wind and light power generation,reduce the required peak load capacity of the system,and achieve stable power output.