摘要
为提高光伏发电系统的能量利用率,结合光伏发电系统输出有功功率–电压曲线的特点,提出一种基于微元面积的扰动步长分段自适应最大功率跟踪方法。在步长调整过程中,使扰动步长的调整算法与微元面积相关联,即令扰动步长的符号由微元面积的符号决定。同时,使扰动步长的大小随着微元面积大小的改变而实现自适应调整,进而实现光伏发电系统的最大功率跟踪。在MATLAB/Simulink环境中搭建仿真模型,验证算法的理论有效性及其对外界条件变化的适应性。
In order to improve energy use ratio of photovoltaic（ PV） generation system,a kind of maximum power point tracking（ MPPT） method for segmented self-adaption of disturbance step-size is proposed by combining with characteristic of output active power-voltage curve of the PV generation system. In the process of step-size adjustment,the adjustment algorithm for disturbance step-size is related to infinitesimal element which means that symbol of disturbance step-size is decided by that of infinitesimal element.Meanwhile,the size of step is changed with that of infinitesimal element to realize self-adaption adjustment and then MPPT of PV system. Simulation model is set up in MATLAB /Simulink environment to verify theoretical validity of the algorithm and adaptability to external condition changes.
出处
《广东电力》
2016年第4期29-33,共5页
Guangdong Electric Power
关键词
光伏发电
微元面积
步长自适应
算法速度
负载突变
photovoltaic generation
infinitesimal element
step-size self-adaption
algorithm speed
load changes
