基于电导增量法的改进型光伏电池MPPT控制方法仿真研究  

Simulation Research on Improved Photovoltaic Battery MPPT Control Method Based on Conductance Increment Method

作　　者：周逢雨 苗中华[1] 韩科立 

机构地区：[1]上海大学机电工程与自动化学院

出　　处：《工业控制计算机》2019年第11期88-90,120,共4页Industrial Control Computer

摘　　要：良好的最大功率点跟踪(MPPT)方法能够有效提升太阳能光伏发电效率。分析比较了单相光伏发电并网系统中恒定电压法、扰动观测法和电导增量法三种常规MPPT控制方法的优缺点,并在此基础上提出了变步长电导增量法控制方案。根据光伏电池最大功率点左右两侧曲线斜率绝对值的比例关系,设置两个不同的步长比例系数对电压进行调整,使得系统更快到达最大功率点附近。仿真结果表明,该方法能明显提升系统最大功率点跟踪速度,减小振荡幅度,改善系统性能。A good maximum power point tracking(MPPT)method can effectively improve the efficiency of solar photovoltaic power generation.This paper analyzes and compares the advantages and disadvantages of three conventional MPPT control methods,such as constant voltage method,disturbance observation method and conductance increment method,in the single-phase photovoltaic power generation grid-connected system.Based on this,a variable step-size conductivity incremental method control scheme is proposed in this paper.According to the proportional relationship between the absolute values of the slopes of the left and right sides of the maximum power point of the photovoltaic cell,two different step size ratio coefficients are set to adjust the voltage,so that the system reaches the vicinity of the maximum power point faster.The simulation results show that the method can significantly improve the system's maximum power point tracking speed,and reduce the oscillation amplitude,improve system performance.

关 键 词：光伏电池 最大功率控制 变步长电导增量法 

分 类 号：G63[文化科学—教育学]