电力系统自动化Issue(10)：42-49,8.DOI:10.7500/AEPS20140629005
不规则阴影影响下光伏阵列最大功率点跟踪方法
Maximum Power Point Tracking of Photovoltaic Array Under Nonuniform Shadow Conditions
摘要
Abstract
The photovoltaic (PV) array output characteristic curve in nonuniform shadow conditions has multi-local maximum power points.In this case,it is hard for a traditional maximum power point tracking (MPPT) method to find the global maximum power point but fall into the local maximum power point.To address this drawback,by virtue of the fast response, good robustness in nonlinear system control of sliding mode variable structure control(SMVSC)and the succinctness and high tracking efficiency of perturbation and observation(P&O) method,an algorithm that combines SMVSC and P&O method is proposed.It is used in PV array MPPT control in nonuniform shadow conditions to solve the problem of multi-peak optimization in partial shading.In order to verity the rationality of the algorithm,the experimental circuit of PV array under nonuniform shadow conditions is built.The experimental results show that compared with the traditional P&O method,the algorithm proposed is capable of fast tracking the global maximum power point to make the system work stably in the vicinity of the maximum power point,to reduce the fluctuations of output power,thus making full use of solar energy.关键词
光伏阵列/不规则阴影/最大功率点跟踪/滑模变结构控制/扰动观察法Key words
photovoltaic (PV) array/nonuniform shadow conditions/maximum power point tracking (MPPT)/sliding mode variable structure control (SMVSC)/perturbation and observation(P&O) method引用本文复制引用
周天沛,孙伟..不规则阴影影响下光伏阵列最大功率点跟踪方法[J].电力系统自动化,2015,(10):42-49,8.基金项目
国家自然科学基金资助项目(61105063)。This work is supported by National Natural Science Foundation of China(No.61105063) （61105063）
