Errors analysis of dish solar auto-tracking system

Wang Linjun;Shao Lei;Men Jing;Zhang Dong;Xu Lixiao;Liu Wei;Gao Zhangwei;College of Mechano-Electronic Engineering, Lanzhou University of Technology;Research Center of Solar Energy and Gas Hydrate, Lanzhou University of Technology;

dish solar thermal electric power generation;;tracking system;;control segment;;transmission part;;error analysis

Dish solar thermal electric power generation is one of the main utilization forms of the solar energy, which has the advantages of great exploiting potential and high heat-electricity conversion efficiency etc. Higher tracking accuracy is required for dish solar thermal equipment, as the sun's rays need to be converged. Due to the influence of the existing manufacturing technology level, the auto-tracking system is affected by different sorts of errors during the production process. Through the serious analysis of the control segment, transmission part and other parts of the dish solar auto-tracking system, a conclusion was drawn: some software system error, the transmission error, the installation error and other errors can be shown quantifiably, and appropriate measures can be taken to avoid or decrease them; however, the errors of the hardware system and the working platform, the errors caused by the lubrication and the seal, the wind load error and some other errors cannot be quantitative expressed or avoided. This conclusion lays a theoretical foundation for the study of improving the precision of the auto-tracking system.