摘要
以光伏发电系统模型为基础,把直流变换器中的Boost电路作为研究对象,先分别采用占空比恒定的定脉宽调制和占空比可调的传统PI控制作为控制方法,利用Matlab/Simulink仿真工具搭建仿真模型,分别根据不同的控制方法对Boost电路进行仿真分析;由仿真可知,定脉宽调制控制和传统PI控制的参数设置均无法适应实际运行工况的变化;基于此,提出一种模糊PI控制算法,通过对传统PI控制的参数设定进行实时调整,改善Boost电路的输出电压,使系统能更好地应对实际运行工况的变化;仿真分析可得,基于模糊PI控制的光伏直流变换器鲁棒性增强,Boost电路输出电压的最大超调降低,输出电压的稳定时间缩短,Boost电路抗干扰能力增强。
Based on photovoltaic power generation system model,the Boost of the DC converter circuit as the research object,first duty ratio were used respectively to a constant pulse width modulation and adjustable duty ratio as the traditional PI control algorithm,using Matlab/Simulink simulation tool to build simulation model,according to the different control method to Boost circuit simulation analysis.It can be seen from the simulation that both the constant pulse width modulation control and the traditional PI control parameter settings are unable to adapt to the changes of the actual operating conditions.Based on this,a fuzzy PI control algorithm is proposed to improve the output voltage of Boost circuit by adjusting the parameters of traditional PI control in real time,so that the system can better cope with the changes of actual operating conditions.Simulation analysis shows that the photovoltaic DC converter based on fuzzy PI control is more robust,the maximum overmodulation of Boost circuit output voltage is reduced,the stability time of output voltage is shortened,and the anti-interference ability of Boost circuit is enhanced.
作者
廖勇
陈继斌
过李峤
王崇
户秀琼
Liao Yong;Chen Jibin;Guo Liqiao;Wang Chong;Hu Xiuqiong(School of Building Environment Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China;College of Intelligent Manufacturing,Panzhihua University,Panzhihua 617000,China)
出处
《计算机测量与控制》
2020年第4期100-104,共5页
Computer Measurement &Control
基金
四川省教育厅科研项目(15ZB0427)
攀枝花学院重点培育项目(2015BY13)
大学生创新创业训练计划项目(201611360009)。
作者简介
廖勇(1995-),男,四川邛崃市人,研究生,主要从事新能源发电方向的研究。;通讯作者:陈继斌(1961-),男,河南潢川县人,工学硕士,教授,主要从事建筑智能化技术方向的研究。
