温度对屋顶分布式光伏系统发电效率的影响分析

提高发电效率是光伏模块进一步大规模应用的关键。温度是影响光伏模块发电效率的重要因素之一,尤其对屋顶分布式光伏系统而言。基于某屋顶分布式光伏电站运行数据,分析了温度对光伏模块发电效率的影响。通过建立多元线性回归模型探讨了环境温度与电池板发电效率的关系,并提出了一种拟合度较高的理论发电量计算模型。该模型可用于计算电站的应发电量和相应的损失发电量,以便综合考虑收益与成本,判断是否采取适当的降温措施。

Effect of temperature on power generation efficiency of roof-distributed photovoltaic system

Improving the power generation efficiency is the key to further large-scale application of photovoltaic (PV) modules. Temperature is one of the factors affecting its efficiency, especially for the roof-distributed photovoltaic system. The influence of temperature on the power generation efficiency of photovoltaic modules was analyzed on the basis of operation data of a roof-mounted PV power plant. The relationship between ambient temperature and power generation efficiency was discussed by establishing a multiple linear regression model. A theoretical calculation model with higher goodness of fit was proposed, which could be used to calculate the electrical output of a power station and its corresponding loss of the output by taking into account both the benefits and costs. The model also could help to determine whether to take appropriate cooling measures.