摘要
针对传统的扰动观察法(perturbation and observation method,P&O)跟踪速度较慢、跟踪精度不高,且容易振荡等问题,提出一种基于改进P&O的光伏最大功率点跟踪(maximum power point tracking,MPPT)控制方法,以占空比为扰动步长,将光伏阵列的功率变化率dP/dU和电压偏差变化率ΔU/ΔP引入扰动步长中,通过实时自适应调整占空比,实现更快、更可靠地跟踪最大功率点。仿真结果表明,相较于传统P&O,改进的P&O在同等条件下拥有更好的跟踪速度与跟踪精度。
Aiming at the problems of slow tracking speed,low tracking accuracy and easy oscillation of traditional perturbation and observation method(P&O),a maximum power point tracking(MPPT)control method for photovoltaic array based on improved P&O is proposed.The duty cycle is used as the disturbance step,and the power change rate dP/dU and voltage deviation change rate△U/△P of the photovoltaic array are introduced into the disturbance step,and the duty cycle is adjusted adaptively in real time to achieve faster and more reliable tracking of the maximum power point.The simulation results show that compared with the traditional P&O,the improved P&O has better tracking speed and tracking accuracy under the same conditions.
作者
罗宇强
王江伟
谢锡锋
LUO Yuqiang;WANG Jiangwei;XIE Xifeng(Guangxi Vocational College of Water Resources and Electric Power,Nanning 530023,China)
出处
《红水河》
2023年第6期42-46,51,共6页
Hongshui River
基金
2021年度广西高校中青年教师科研基础能力提升项目(2021KY1105)
广西高等学校高水平创新团队及卓越学者计划项目(桂教人才[2020]6号)
广西水利电力职业技术学院科研项目(2023rc01)。
关键词
光伏发电系统
扰动观察法
最大功率点跟踪
占空比
photovoltaic system
perturbation and observation method
maximum power point tracking
duty cycle
