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电网技术  2014 

融合最大功率点追踪和寻光感知技术的太阳能智能跟踪系统设计

DOI: 10.13335/j.1000-3673.pst.2014.01.014, PP. 87-92

Keywords: 太阳能,光伏电池,最大功率点跟踪,寻光感知模块,离散式跟踪

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Abstract:

针对目前跟踪式太阳能光伏电池发电系统跟踪误差较大、抗干扰性较差、系统耗能较高等问题,融合最大功率点追踪(maximumpowerpointtracking,MPPT)和智能寻光感知技术设计了一套太阳能光伏电池跟踪系统,实现了光电转化效率的最大化。运用投影原理研制了寻光传感器,加入光强感测单元构成智能寻光感知模块,消除气候条件影响实现系统全天候的运行工作。为降低系统功耗,将跟踪方式设计为离散式,系统空闲时断电待机。对实现最大功率点跟踪的扰动观察法进行优化改进,提出差别化扰动方式避免了扰动观察法在最大功率点附近产生震荡及光强变化时的误动作。经实验验证,该系统跟踪分辨力可达到0.344?,系统误差小于2.5°,系统充电效率提高40%以上。

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