CPV系统中太阳能转换效率分析方法的探讨

摘要

The solar energy conversion efficiency is an important indicator to evaluate the performance of the solar system. In the concentrated photovoltaic system, the relationship between solar tracking error and the solar conversion efficiency was analyzed. And an tracking-error analysis method of the solar energy conversion efficiency was proposed,which filled the gap of lacking evaluation criteria of solar energy conversion efficiency. The error analyse methold proposed in the paper was illustrated by taking the datas of whole day solar radiation in one day as example, two classical algorithms of sun position were-adopted. Through the theory analysis and verification showed that the error analysis method could be used to evaluate the solar energy conversion efficiency of the CPV system.%太阳能转换效率是评价太阳能系统优劣的重要指标.在聚光光伏系统中,太阳能转换效率受太阳跟踪误差的影响较大.文章分析了太阳跟踪误差与太阳能转换效率之间的关系,提出了基于跟踪误差的太阳能转换效率误差分析法,填补了光伏产业中缺少太阳能转换效率评定标准的空白.文章以北京地区某日全天太阳光照辐射量数据为例,采用了两种经典的太阳位置算法,对文章所提出的误差分析法进行了验证说明.理论分析和验证表明,误差分析法可以作为评价太阳能系统能量转换效率的评定依据.