基于光敏二极管传感器三维阵列的光伏跟踪误差检测研究

PV TRACKING ERROR DETECTION BASED ON 3D ARRAY OF PHOTODIODE SENSORS

光伏跟踪系统可提高光伏发电系统的发电效率,但由于光伏跟踪系统的运行机构及运动控制算法等存在不稳定性,常会导致其运行效果不理想,跟踪精度难以保障。为实现光伏跟踪系统跟踪误差的现场检测,设计了一种基于光敏二极管传感器三维阵列的光伏跟踪误差检测装置,该装置主要包括1个由多个光敏二极管传感器以三维阵列规则镶嵌构造的圆球体和主控制系统等;并设计了基于激光水平仪的传感器标定方案,实现传感器初始值偏差校正,提升检测装置一致性,实现对单轴或双轴光伏跟踪系统跟踪误差的自动检测。经设备试制及测试验证,结果表明:该检测装置可满足光伏跟踪系统跟踪误差检测精度需求,能够准确在线检测单轴、双轴光伏跟踪系统在不同情况下的跟踪误差。

PV tracking system can improve the power generation efficiency of PV power generation system.However,due to the instability of the operating mechanism and motion control algorithm of the PV tracking system,its operation effect is often not ideal,and the tracking accuracy is difficult to guarantee.In order to realize the on-site detection of the tracking error of the PV tracking system,this paper designs a PV tracking error detection device based on the 3D array of photodiode sensors.The device mainly includes a spherical body composed of multiple photodiode sensors reqularly inlaid in a 3D array and the main control system;A sensor calibration scheme based on the laser level is designed to realize the correction of the initial value deviation of the sensor,improve the consistency of the detection device,and realize the automatic detection of the tracking error of the single-axis or doute-axis PV tracking system.After the trial production and test verification of the equipment,the results show that the detection device can meet the tracking error detection accuracy requirements of the PV tracking system,and can accurately detect the tracking error of the single-axis or double-axis PV tracking system under different conditions online.