时控算法下聚光光伏双轴逐日系统追踪静差分析与消除

Analysis and elimination of tracking error for concentrating dual-axis solar tracker using the time control algorithm

为了提高光伏组件的发电效率,在当前的光伏发电领域中引入了光伏逐日系统。该系统可对太阳运行轨迹进行实时追踪,可极大地提高光伏组件的发电效率。以往的研究侧重于追踪算法的优化与追踪精度的提高,忽略了逐日追踪系统因时间精度、经纬度定位、水平校准等因素所带来的系统追踪静差。文章以太阳运行轨迹数学模型为基础,在利用传统时控算法追踪太阳运行轨迹的基础上,分析逐日追踪装置产生系统追踪静差的主要因素,并设计一种在追踪太阳运行轨迹的过程中,可修正逐日系统追踪静差的静差消除方法。研究结果表明,文章对光伏逐日系统追踪静差来源的分析正确、可靠,所设计的方法亦可有效地消除追踪静差。

In order to improve the efficiency of the photovoltaic panel, the dual-axis solar tracking system has been introduced to the photovoltaic field in recent years. This system can track the sun in real-time, so the efficiency of the PV panel has been greatly improved. In the past study, the researchers paid more attention on the optimization and tracking accuracy of the tracking algorithm,but most of them ignored the system error brought by the time accuracy, the latitude and longitude error, the installation position error and other factors. The sun trajectory mathematical model and the time control algorithm were used as the basis of this research, and the major factors of system error were taken into account. It also designed a tracking error elimination method which can correct the static tacking error. The experiment has showed that this method has good practicability and can eliminate the system error effectively.