塔式光热电站定日镜跟踪精度校正技术研究

Research on Tracking Accuracy Correction Technology of Heliostat in Tower Solar Thermal Power Station

为提高光热电站定日镜校正合格率,从定日镜跟踪精度校正的必要性出发,结合塔式光热电站定日镜控制系统及光斑校正系统对校正的理论依据、校正策略等进行了研究,分析了风速、云层及太阳直接辐射(DNI)、镜面清洁系数、校正系统及临时局域网的稳定性等因素对校正结果的影响,并提出了具体的应对策略。研究表明,当风速小于5 m/s、DNI值大于800 W/m^(2)、镜面清洁系数超过0.7时定日镜跟踪精度的校正合格率能够达到60%以上。

In order to improve the qualification rate of heliostat correction in tower solar thermal power station, starting from the necessity of heliostat tracking accuracy correction, combined with heliostat control system and spot correction system of tower solar thermal power station, this paper studied the theoretical basis and correction strategy of correction, analyzed the influence of wind speed, cloud and solar direct radiation(DNI), mirror cleanliness coefficient, the stability of correction system and temporary LAN on the correction results, and put forward specific countermeasures.The research results show that when the wind speed is less than 5 m/s, the DNI value is more than 800 W/m^(2), and the mirror cleaning coefficient is more than 0.7, the calibration pass rate of heliostat tracking accuracy can reach more than 60%.