| With the continuous development of the world’s solar power generation industry and the government’s constant attention to green solar power generation,tower solar thermal power generation is a green development way for green energy,with its good power quality,and its power generation is steadily adjustable,and with its long service life,with small heat loss and high efficiency,and could be complementary with other power generation approaches,tower solar thermal power generation has been gaining attention.China’s tower solar thermal power generation is currently in its infancy and has a large technical demand,and the requirements for low-cost,high-reliability,high-efficiency,high-precision,and good wind resistance of heliostat system is urgent,therefore the improvement of the traditional heliostat driving technologies and the exploration of the new heliostat driving systems have become an important research subject in tower solar thermal power generation.A multi-rope driving system for heliostat with polar axis based on the requirements of low-cost,high-efficiency,wind resistance is designed in this paper,and the three-rope driving system launched a major study.Firstly,the mechanical structure and the movement principle of the three-rope driving system are introduced.Secondly,the kinematics modeling of the three-rope driving system is performed.The mathematical relation between the angle regulation rate of the heliostat and the change rate of the driving ropes’ length is obtained,and the mathematical relation between the angle regulation rate of the heliostat and the rotation rate of the driving winch is obtained.Then,the control method of the three-rope driving system is studied,and a multi-operation mode control method can meet different working condition is designed,and the control strategies of the two different angle regulation processes of roll angle regulation and pitch angle regulation is respectively designed.Thirdly,the control system’s hardware and software design of the three-rope driving system are carried out,which provide foundation for the experimental verification of the system’s performance.Finally,a three-rope driving system’s experimental platform is built,and experimental results show that the three-rope driving system can effectively reduce the cost of heliostats,and with high driving efficiency,good stability and reliability. |
