局部阴影下光伏阵列呈多波峰特性的MPPT算法研究  

The MPPT algorithm study of PV array with multi-peak characteristics in partial shadow

作　　者：高金辉[1] 马高峰[1] 杨艳茜 

机构地区：[1]河南师范大学物理与电子工程学院 河南省光伏材料重点实验室,河南新乡453007

出　　处：《电子技术应用》2013年第12期61-63,67,共4页Application of Electronic Technique

基　　金：河南省重点科技攻关项目(102102310041)

摘　　要：带有旁路二极管的光伏组件在局部阴影的遮蔽下,其输出的P-U特性是由多个局部峰值构成的非线性曲线,使传统的单峰MPPT算法无法准确跟踪最大功率点。通过建立并分析局部阴影下光伏组件的数学模型可避免陷入局部峰值。在传统电导增量法寻找峰值的基础上,应用聚拢峰值扫描判别法,分别从短路电流和开路电压处向中间聚拢扫描峰值并比较大小,直到找出真正的最大功率点。仿真结果表明,该算法在局部阴影下不会陷于局部峰值,能够快速跟踪最大功率点,明显提高了系统的光电转换效率。PV modules with a bypass diode in partial shadow of the shielding, the output P-U characteristic curve is consti- tuted by multiple local peak, the traditional single peak MPPT algorithm can not accurately track the maximum power point. In or- der to avoid into a local peak, through the establishment and analysis of mathematical models of PV modules in partial shadow, on the basis of the traditional incremental conductance, by using the ＇gather the peak scan method＇, gather peak from the short cir- cuit current and open circuit voltage to the middle and compare the size,until find the real maximum power point. The simulation results show that the algorithm can not be trapped in local peak, the system can quickly track the maximum power point, and im- prove the photoelectric conversion efficiency.

关 键 词：局部阴影 光伏发电 多波峰 MPPT 

分 类 号：TM615[电气工程—电力系统及自动化]