摘要
在准赤道坐标系统下,详细讨论了光伏跟踪系统的最佳跟踪角度。给出了具有方位角和坡度偏差校正功能的最佳跟踪角度的表达式。提出了准赤道坐标系统下的Back-Tracking的跟踪算法。利用该坐标系统计算出的太阳位置与MICA水平坐标系数据对比,误差在0.7°内。基于上述最佳跟踪角度,开发了1套可适应不同地形、容积可变的电站级水平光伏跟踪系统,并详细讨论了系统的跟踪策略,在中国6个典型性气象地区对该系统进行了性能分析与讨论。相对于固定安装系统,该系统在无Back-Tracking算法情况下可平均提高21.85%,在具有Back-Tracking算法情况下可平均提高24.71%。
The optimum tracking angles for photovoltaic systems using Pseudo-equatorial coordinates were discussed in detail. Formulas were developed for the optimum tracking angles with azimuth error and gradient slope correction. A back-tracking algorithm using pseudoequatorial coordinates was also proposed. Comparing the sun position calculated by the Pseudo-equatorial coordinates with the MICA horizontal coordinates data, the error was less then 0.7°. Using this optimized tracking method, a horizontal tracking system with variable capacity and suitable for different topographies had been developed and both the system and tracking strategy were discussed in detail. Finally, the performance of this tracking system was analysed at 6 typical meteorological locations in China. Results show that this method gives an average of 21.85% gain without back-tracking and 24.71% gain with back-tracking compared to fixed systems.
出处
《中国电力》
CSCD
北大核心
2010年第7期71-76,共6页
Electric Power
