光伏系统设计中太阳辐射强度影响的分析

摘要

太阳辐射强度影响光伏系统的发电量,根据工程上常用的晶体硅太阳电池的数学模型,利用典型气象年逐时数据,考虑太阳辐射强度的影响,利用Visual Basic语言编程分别计算了一天和一年中的光伏电池组件的发电量,并与不考虑辐射强度影响的峰值日照时数方法计算结果进行比较.结果表明:昆明地区考虑辐射强度的逐时计算结果与不考虑辐射强度的计算结果相差7.05％,光伏系统设计中必须考虑当地的太阳辐射强度分布情况.%The solar radiation intensity affects the capacity of electricity which the photovoltaic ( PV ) system produces. According to the commonly used mathematical module of crystal - silicon solar cell in engineering , the capacity of electricity that the PV module produces in one day and all over the year were calculated respectively with the hourly data in a typical year in Kunming in Visual Basic programing. The influence of solar radiation has been taken into account in the calculation. Comparing with the result without considering the influence of solar radiation, it is shown that difference between the two results is 7. 05% , and the distribution of the local solar radiation must be taken into account in the design of PV system.