摘要
针对光伏充电系统中光伏电池利用率低、充电电路转化效率不高以及充电质量差的问题,对光伏电池进行建模分析,明确了其最大功率点随光照强度和温度变化的关系。在此基础上,设计了一种结合恒压跟踪法和扰动观察法的最大功率点跟踪(MPPT)算法,在Simulink中仿真发现其能快速准确地追踪到光伏电池的最大功率点;还设计了双相交错并联同步BUCK拓扑结构的硬件电路,结合蓄电池充电特性,采用了融合MPPT算法的4阶段智能充电方式。实验结果表明设计的光伏充电控制器能使光伏电池工作在最大功率点并实现充电阶段的准确切换,充电电路的转化效率在97%以上。
A Maximum Power Point Tracking（MPPT） algorithm based on Constant Voltage Tracking and Perturbation Observation is designed in this paper.It is found in Simulink that it can quickly and accurately track the maximum power point of photovoltaic cells.A two-phase staggered parallel sync BUCK topology is designed,and the 4-stage intelligent charging mode combined with MPPT algorithm is adopted considering the charging characteristics of the battery.The experimence results show that the designed PV charging controller can make the photovoltaic cell work at the maximum power point and realize the accurate switching of the charging stage,and the conversion rate of the charging circuit is over 97%.
出处
《工业控制计算机》
2017年第12期157-158,160,共3页
Industrial Control Computer
