荒山荒坡光伏组件特性的建模与分析

Modeling and analysis of PV characteristics on barren hillslopes

青海省东部地区具备良好的光资源及自然环境条件,适宜大型光伏电站的建设。然而,荒山荒坡光照环境复杂,日温差大,增大光伏组件控制难度,影响系统运行效率,制约了光伏发电技术的发展。基于青海省东部地区自然环境及太阳运动轨迹,提出荒山荒坡光照环境及温度变化随机模型和光伏组件输出模型,对荒山荒坡不同海拔高度及山势的光伏组件输出特性进行计算,并根据计算结果得出荒山荒坡光伏系统的发电规律,越靠近山底,遮挡越多,光照复杂性增大,温度略微上升,发电效率降低,波动性增强。

Eastern of Qinghai province is suitable for large PV power station construction, which has good lighting resource and environmental conditions. However, complex lighting environment and day temperature changes greatly in barren hillslopes increase the control difficulty of PV module, affect the system operating efficiency, and restrict the development of PV power generation technology. Based on natural environment and solar trajectory in eastern of Qinghai province, the stochastic variation model of light environment and temperature and the output module of PV module were put forward to calculate the output characteristics of PV modules at different altitudes and mountains in barren hillslopes. According to the calculation results, summarized the PV module power generation rules in barren hillslopes, the closer to the bottom, light is more and more complex, temperature raised, in the same time, power generation efficiency decreased and fluctuation increased.