提出基于光斑螺旋运动轨迹的定日镜跟踪误差测量方法,该方法通过控制定日镜转动,使定日镜光斑按照螺旋线轨迹运动,使用相机采集定日镜的光斑图像并进行图像处理,最终获得定日镜的跟踪误差。阐述螺旋轨迹法测量定日镜跟踪误差的原理,搭建定日镜跟踪误差测量实验平台,使用相机光靶法对螺旋轨迹测量方法的正确性进行验证,结果表明螺旋轨迹法与相机标靶法的测量结果基本一致,两种方法测量的定日镜方位和俯仰跟踪误差的偏差值均方根分别为0.016°和0.018°。
Abstract
This paper proposes a heliostat tracking error measurement method based on the spiral motion trajectory of the light spot. This method involves controlling the rotation of the heliostat to make its reflected light spot follow a spiral trajectory. The spot images are captured by a camera and processed to ultimately determine the heliostat’s tracking error. The principle of the spiral trajectory method for measuring heliostat tracking error is elaborated. An experimental platform for measuring heliostat tracking error is established, and the camera light-target method is used to verify the correctness of the spiral trajectory measurement method. The results show that the measurements from the spiral trajectory method are largely consistent with those from the camera target method. The root mean square deviations of the measured azimuth and elevation tracking errors between the two methods are 0.016° and 0.018°, respectively.
关键词
定日镜 /
太阳能热发电 /
跟踪误差 /
图像处理 /
螺旋线 /
纠偏算法
Key words
solar thermal power generation /
heliostat /
tracking error /
image processing /
spiral trajectory /
correction algorithm
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参考文献
[1] 许芬. 塔式太阳能定日镜聚光成像建模及仿真[J]. 太阳能学报, 2010, 31(10): 1304-1310.XU F. Modeling and simulation of sun image formed by CSP heliostat[J]. Acta energiae solaris sinica, 2010, 31(10): 1304-1310.
[2] 孙飞虎, 郭明焕, 白凤武, 等. 定日镜跟踪纠偏策略综合应用研究[J]. 太阳能学报, 2014, 35(7): 1272-1279.SUN F H, GUO M H, BAI F W, et al. Integrated application of heliostat tracking correction strategies[J]. Acta energiae solaris sinica, 2014, 35(7): 1272-1279.
[3] 程松, 谢文韬, 王魏, 等. 定日镜跟踪的误差源分析及其算法改进[J]. 太阳能学报, 2020, 41(9): 248-256.CHENG S, XIE W T, WANG W, et al. Error component analysis of heliostat tracking and its improved algorithm[J]. Acta energiae solaris sinica, 2020, 41(9): 248-256.
[4] 孙飞虎, 王志峰, 郭明焕, 等. 基于跟踪轴参考位错位法的定日镜自动纠偏系统[J]. 太阳能学报, 2016, 37(4): 877-883.SUN F H, WANG Z F, GUO M H, et al. Automatic heliostat tracking correction system based on a tracking angle bias strategy[J]. Acta energiae solaris sinica, 2016, 37(4): 877-883.
[5] SATTLER J C, RÖGER M, SCHWARZBÖZL P, et al. Review of heliostat calibration and tracking control methods[J]. Solar energy, 2020, 207: 110-132.
[6] BAHETI R, SCOTT P.Design of self-calibrating controllers for heliostats in a solar power plant[J]. IEEE transactions on automatic control, 1980, 25(6): 1091-1097.
[7] ANDRAKA C E, HO C K, KHALSA S S S. An automated method to correct heliostat tracking errors[R]. Sandia National Lab.(SNL-NM), Albuquerque, NM(United States), 2011.
[8] SMITH E J, HO C K.Field demonstration of an automated heliostat tracking correction method[J]. Energy procedia, 2014, 49: 2201-2210.
[9] GUO M H, WANG Z F, ZHANG J H, et al.Study on the general accurate azimuth-elevation tracking angle formula for heliostat and its applications[J]. Advances in energy and power engineering, 2015, 3(5): 123-138.
[10] GUO M H, WANG Z F, ZHANG J H, et al.Determination of the angular parameters in the general altitude-azimuth tracking angle formulas for a heliostat with a mirror-pivot offset based on experimental tracking data[J]. Solar energy, 2012, 86(3): 941-950.
[11] MALAN K, GAUCHÉ P.Model based open-loop correction of heliostat tracking errors[J]. Energy procedia, 2014, 49: 2118-2124.
[12] ZAVODNY M, SLACK M, HUIBREGTSE R, et al.Tower-based CSP artificial light calibration system[J]. Energy procedia, 2015, 69: 1488-1497.
[13] 宋洋. 塔式太阳能热发电镜场摄像机系统的设计与开发[D]. 杭州: 浙江大学, 2013.SONG Y. Design and development of camera system in solar power tower plant[D]. Hangzhou: Zhejiang University, 2013.
[14] 刘崇军. 等距螺旋的原理与计算[J]. 数学的实践与认识, 2018, 48(11): 165-174.LIU C J. The theory and calculation of equidistant spiral[J]. Mathematics in practice and theory, 2018, 48(11): 165-174.
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