贝塞尔函数的光伏模块最大功率跟踪系统  

Maximum power tracking system of PV module based on Bezier function

作　　者：朱显辉 鲁双峰 王鹏 刘进 王一凡 Zhu Xianhui;Lu Shuangfeng;Wang Peng;Liu Jin;Wang Yifan(School of Electrical&Control Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2024年第4期631-636,共6页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省普通本科高等学校青年创新人才培养计划项目(UNPYSCT-20I7144);黑龙江省省属高校基本科研业务费项目(2019-KYYWF-0730)。

摘　　要：针对传统光伏模块最大功率跟踪系统建模复杂和响应时间慢的问题,提出了一种基于贝塞尔函数的光伏模块最大功率跟踪方法。采用二阶贝塞尔函数对光伏模块输出特性进行拟合,引入变步长扰动观察法,通过实时调整步长以改善最大功率跟踪的响应时间,构建基于Boost电路的实验平台,模拟和实验验证在不同工况和负载条件下的系统性能。结果表明,在工况和负载变化时,电压平均相对误差小于2.5%,跟踪时间缩短了61%。该研究证明了所提出的贝塞尔函数模型不仅简化了光伏模块的建模过程,而且提高了系统精度和响应速度。This paper intends to address the complex modeling and slow response time of the maximum power tracking system of traditional PV module.The study consists of introducing PV module modeling method based on Bezier function into the maximum power tracking model;achieving the simple and accurate fitting of PV output characteristics by using two second-order Bezier functions,as which improves the module modeling accuracy and reduces the modeling complexity;proposing the real-time adjustment of the step size variable step size disturbance observation strategy which improves the response time of the maximum power tracking;simulating the effect of maximum power tracking of the system under the working condition and load changes respectively;and building the experimental platform based on boost.The results show that the average relative error of the voltage is less than 2.5%under the changes of condition and load,and the tracking time of the system is shortened by 61%,as which fully proves that the proposed model is not only simple,but also has good accuracy and rapidity.

关 键 词：光伏模块 最大功率 变步长扰动观察法 二阶贝塞尔函数 BOOST电路 

分 类 号：TM914[电气工程—电力电子与电力传动]