基于交错Buck变换器的光伏系统MPPT控制  

MPPT Control for Photovoltaic System Based on Interleaving Buck Converter

作　　者：吕川[1] 王斌[1] 张良力[1] 陈赟[1] 

机构地区：[1]武汉科技大学信息科学与工程学院,武汉430081

出　　处：《计算机测量与控制》2014年第12期3964-3966,共3页Computer Measurement &Control

基　　金：国家自然科学基金项目(51308426);湖北省教育厅科学研究计划项目(B2014091)

摘　　要：具有最大功率点跟踪(MPPT)功能的控制器常采用单相Buck变换器,输出功率稳定性差;鉴于此,提出将交错并联技术应用于Buck变换器,并以两相交错并联Buck变换器为例进行研究,减小输出电压、电流纹波,提高了输出功率稳定性,有利于实现MPPT控制;然后针对固定步长扰动观察法跟踪速度与精度之间的矛盾,研究了一种自适应变步长的算法,MATLAB仿真结果表明,改进算法具有较好的跟踪速度和稳态性能。The single-phase Buck is often used in Power converters which have the function of MPPT,the stability of output power is poor.Because of that,this paper proposes interleaving technique applied to the Buck converter.Take two-interleaving Buck converter for example,the output voltage and current ripple is reduced,the stability of output power is improved,and it benefits MPPT control.As fixed step size of perturbation and observation method cannot balance between speed and precision,adaptive step algorithm is proposed.The simulation results show that this algorithm has better tracking speed and steady-state performance.

关 键 词：交错Buck 最大功率点跟踪 扰动观察法 自适应变步长 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]