The Control Strategy And Control System Researching On Hydroelectric Wind And Solar Complementary Power Generation

The impact of the energy crisis has led many countries to develop and utilize renewable energy in recent years.The use of renewable energy is mainly to convert them into electricity.At present,the main use of renewable energy for power generation is mainly hydroelectric,wind and solar energy.However,all three kinds of energy sources are affected by natural conditions: hydroelectric can exist during the high and low flow periods,and wind and light energy are random and intermittent.These characteristics will affect the stability of the system and the quality of the power.Hydropower,wind power and photovoltaic power generation exhibit complementary characteristics in both the short and long term.Therefore,to establish a microgrid system composed of three renewable energy sources,hydroelectric,wind and solor power must solve the problem of multi-source supply control and coordination and real-time scheduling between multiple power sources.This paper starts with the characteristics of hydroelectric,wind and solar power generation,combined with the working characteristics of the battery,analyzes the development status and current problems of the micro-grid system composed of four kinds of power sources.The operation control strategy of the hydroelectric-wind-light micro-grid system is studied.The micro-power supply is controlled by PQ control,and the control strategy combining PQ control and VF control is proposed for the energy storage system.Based on the three-layer typical control architecture of microgrid,a coordinated control strategy for microgrid based on energy storage state assessment is proposed.Based on the idea of the tie line,the energy storage system is used to quickly balance the power of the tie line to realize the grid connection and off-grid operation of the microgrid system.Based on hydropower,wind power,photovoltaic power generation and energy storage system,this paper designs a microgrid system with four power supplies.Based on Matlab/Simulink simulation software,a water and wind hybrid power generation microgrid system model is established.The typical days of hydropower,wind power,and photovoltaic power generation data were simulated.The simulation results show that the power generation by the micro-grid system composed of hydroelectric and wind power can effectively suppress the power fluctuation caused by wind and light random power supply,improve the stability and power quality of the system,and further confirm the water-wind scenery proposed in this paper.The science and effectiveness of the control strategy of the microgrid system.