一种新型光伏发电系统最大功率跟踪算法  

Improved Maximum Power Point Tracking Algorithm for Stand-alone Photovoltaic System

作　　者：李鹰[1,2] 康龙云[1,2,3] 朱洪波[1,2] 孙静[3] 

机构地区：[1]华南理工大学机械与汽车学院,广东广州510640 [2]广东省绿色能源技术重点实验室,广东广州510640 [3]西安交通大学机械学院,陕西西安710049

出　　处：《电气传动》2010年第12期35-39,共5页Electric Drive

基　　金：国家"863"科研项目(2007AA05Z244)

摘　　要：光伏发电系统的功率输出呈非线性,为有效利用太阳能,对光伏发电进行最大功率追踪显得尤为重要。论述了光伏发电系统输出特性和最大功率跟踪的原理,并提出一种改进的新型最大功率点追踪控制算法,即3段变步长爬山法。通过与自适应爬山法的对比实验表明,这种算法控制特性良好,能快速稳定跟踪太阳能的最大功率点,提高能量转换效率。The photovoltaic generator exhibits a non-linear I-V characteristic,so maximum point power tracking（MPPT） algorithm is commonly used to maximize the power drown from PV modules under varying atmospheric conditions.The output characteristics of photovoltaic module and the theory of maximum power point tracking were analyzed.Then an improved MPPT control algorithm,namely three-section variable step climbing method,was proposed to improve the tracking performance.Finally,comparative experiments between adaptive hill climbing method and three-section variable step climbing method were done.The experimental results show that the improved MPPT takes on more excellent performance.It can extract more energy from PV modules smoothly and quickly.

关 键 词：最大功率跟踪 太阳能 3段变步长爬山法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]