基于改进扰动观察法的光伏MPPT控制算法研究  

Research on MPPT algorithm based on improved perturbation and observation method

作　　者：周睿 徐良 刘文浩 韩冰[1] 万占鸿[2] ZHOU Rui;XU Liang;LIU Wenhao;HAN Bing;WAN Zhanhong(School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Anshan Liaoning 114051,China;Ocean College,Zhejiang University,Zhoushan Zhejiang 316021,China)

机构地区：[1]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051 [2]浙江大学海洋学院,浙江舟山316021

出　　处：《电源技术》2023年第3期388-392,共5页Chinese Journal of Power Sources

基　　金：国家自然科学基金(10902097)。

摘　　要：针对光伏系统输出功率低的现状,提出一种基于扰动观察法的变步长最大功率点追踪算法和Boost电路的改进方法。通过建立光伏仿真模型,在传统MPPT算法的基础上引入自适应步长因子,从而在保证追踪速度降低的同时,也使得输出功率稳定在最大功率点附近,选择合适的电感电容组成无源无损软开关引入Boost电路,降低DC/DC电路本身的功率损耗,最终从速度、精度、效率、功率大小和稳定性等多个维度进行了比较。该方法在提高功率追踪稳定性的同时,能够使追踪速度降低约20%,同时能够大幅度提高光伏系统的输出功率,达20%~30%。提高了MPPT追踪速度,增大了光伏系统整体输出功率。Aiming at the current situation of the low output power of the PV system,a variable-step MPPT algorithm based on the perturbation observation method and an improved method of the Boost circuit were proposed.By establishing a PV simulation model,an adaptive step size factor was introduced on the basis of the traditional MPPT algorithm,thus ensuring that the tracking speed was reduced while also making the output power stable near the maximum power point,selecting a suitable inductor-capacitor composition of the passive lossless soft switch was introduced into the Boost circuit to reduce the power loss of the DC/DC circuit itself,and finally from speed,accuracy,efficiency,power size and stability,and other dimensions were compared.The method was able to reduce the tracking speed by about 20%while improving the stability of power tracking,and at the same time was able to significantly increase the output power of the PV system by 20%to 30%.The MPPT tracking speed was improved and the overall output power of the PV system was increased.

关 键 词：光伏 扰动观察法 非线性关系 最大功率追踪 

分 类 号：TM615[电气工程—电力系统及自动化]