Research Of The Adaptive Control On The Heliostat In Tower Solar Thermal Power Station

Tower solar power generation is an important form of solar thermal utilization. In tower solar thermal power generation, the focusing accuracy of heliostat plays a decisive role in work efficiency of generation station. This paper studies on the closed-loop adaptive control strategy of heliostat. By combining the model reference adaptive control theory with heliostat tracking system, form a closed-loop adaptive heliostat tracking system to enhance the accuracy of altitude-azimuth tracking angle. When heliostat tracking model is created, for the sake of constructing a more accurate simulation model which is closer to the actual system, this paper takes the geometric errors of the heliostat into account in modeling. In this paper, Hartley-Meyer algorithm is introduced to identify the geometric errors of heliostat. The results of the identification are precise. The closed-loop adaptive heliostat tracking system is simulated via MATLAB/SIMULINK platform. Simulation results show that the introduction of adaptive control brings positive effects on heliostat tracking system. The accuracy of the altitude-azimuth tracking angle is promoted, and moreover, the capability of anti-interference is enhanced.