一种用于光伏MPPT的分阶段变步长电导增量法  

Staged variable step size INC MPPT method for PV system

作　　者：吴雷[1] 杜蘅[1] 徐鹏[1] 

机构地区：[1]江南大学电气自动化研究所,江苏无锡214122

出　　处：《电源技术》2016年第3期617-620,共4页Chinese Journal of Power Sources

基　　金：2012年省产学研创新项目

摘　　要：针对传统的光伏系统最大功率点控制算法跟踪精度和速度不能兼顾的问题,提出一种分阶段变步长电导增量法。该算法将光伏电池输出曲线划分为两阶段,根据不同阶段的曲线特性分析比较,从而进行步长模式的切换,在远离最大功率点的动态阶段采用大步长跟踪,而在最大功率点附近的稳态阶段则采用小步长跟踪。仿真结果表明,该方法快速跟踪到最大功率点,且有效降低了系统最大功率点附近的振荡,提高了光伏电池的利用效率。Aiming at the problem that photovoltaic Maximum Power Point Tracking（MPPT） control algorithms could not balance between tracking speed and accuracy, a staged variable step size incremental conductance algorithm was proposed. The output characteristic curve of photovoltaic cell was divided into two stages for analysing. Through the analysis and comparison of performance characteristics of different stage, the step model was switched to chose suitable step size for photovoltaic cell different operation stage. Simulation results show the algorithm can track MPP quickly and reduce the oscillations around the MPP, and improve the utilization efficiency of the photovoltaic cell.

关 键 词：光伏阵列 最大功率点跟踪 变步长 电导增量法 

分 类 号：TM914[电气工程—电力电子与电力传动]