Research And Design Of Small Wind-solar-biogas Complementary Power Generation Control System

In order to achieve all-round sustainable development of energy use,the use of renewable energy is becoming more and more important,and research on new energy technologies is also increasing,especially renewable energy power generation technology.Although the power generation technology of wind power generation,solar power generation,and biogas power generation is already high at home and abroad,the energy generated by these renewable energy sources is unstable and reliable due to various environmental factors.Therefore,wind energy,solar energy,and biogas can be combined to form a wind and methane complementary power generation system that can effectively solve various problems caused by the external environment and other objective factors,and achieve continuous and stable power supply.The system can be used in areas where conventional power grids are not covered or where power supply conditions are poor,improving the reliability and continuity of power supply in the area.This design is mainly to study the small wind-solar-biogas complementary power generation control system.The research contents are as follows:Firstly,the wind power generation system,concentrating solar power system,biogas power generation system,battery structure,working mode and mathematical model are introduced.The power generation characteristics of each power generation system are introduced in detail.Then,the wind power generation system,concentrating solar power system and biogas are studied.The control strategy of the power generation system and the battery pack adopts the maximum power tracking control(MPPT)for the wind power generation system,to realize the maximum power output of the wind power generation system;the light intensity tracking technology is adopted for the concentrating solar power system to perform the solar position Tracking,thereby improving the efficiency of the system receiving solar radiation intensity;the battery pack adopts a charge and discharge control strategy combining maximum power(MPPT)charging and phased charging control strategy.The simulation model of the system is built in MATLAB/Simulink.Firstly,the simulation model of wind power generation system,concentrating solar power system,biogas power generation system and battery is simulated.Secondly,the simulation experiment is carried out on the whole control system to realize the automatic coordinated control of the power generation mode under different weather conditions.According to the control strategy and simulation experiment analysis of the whole system,the hardware design and software design of the whole small wind-solar-biogas complementary power generation control system are implemented by STC8 F series single-chip microcomputer.The hardware circuit design includes light intensity tracking module,signal acquisition module,DC-DC converter module,drive module,alarm and protection module and display.The software design includes main program,wind power and MPPT control subroutine,concentrating solar power system and light intensity tracking subroutine,biogas power generation program and battery charge and discharge control program.According to the design needs,the equipment selection of each part of the system,and physical connection and experimental test;from the experimental results,the overall control method and strategy of the small wind-solar-biogas complementary power generation control system,as well as the software and hardware design method are operability and have good practical value.