光照快速变化下MPPT算法扰动步长的优化设计  

OPTIMAL DESIGN OF MPPT ALGORITHM PERTURBATION STEP LENGTH UNDER RIPID CHANGE SOLAR RADIATION

作　　者：彭志辉[1] 彭玉春 周宏明[1] 李凯 和军平[2] Peng Zhihui;Peng Yuchun;Zhou Hongming;Li Kai;He Junping(College of Mechanical and Electronic Engineering,Wenzhou University,Wenzhou 325035,China;School of Mechanical Engineering and Automation,Shenzhen Graduate School,Harbin Institute of Technology,Shenzhen 518055,China)

机构地区：[1]温州大学机电工程学院,温州325035 [2]哈尔滨工业大学深圳研究生院机电工程与自动化学院,深圳518055

出　　处：《太阳能学报》2020年第8期137-143,共7页Acta Energiae Solaris Sinica

基　　金：温州市科技计划(G20150009);温州市重点科技创新团队项目(C20150006);深圳市科技计划(JCYJ20160531190745967)。

摘　　要：针对传统最大功率点跟踪(MPPT)算法在光辐照快速变化下可能发生误判,从而无法快速和准确地跟踪到最大功率点(MPP),该文在实现MPPT的基础上以太阳电池基本电路方程为基础,构建MPPT算法扰动步长与光辐照强度、环境温度、最大功率点及采样周期之间的数学模型,并分析扰动步长在光辐照强度快速变化时的作用机理。实验结果表明该扰动步长数学模型具有较高的可靠性和实用性。Aiming to the fact that the traditional maximum power point tracking(MPPT)algorithm may make erroneous judgments when the solar radiation rapidly chanees,so that it cannot track the maximum power point(MPP)quickly and accurately.In this paper,taking the realization of the MPPT as basis,basing on the basic circuit equations of solar cell,the mathematical model between the disturbance step length of MPPT algorithm and illumination intensity,environment temperature,maximum power point and sampling period is built.And the effect mechanism of the disturbance step length on the rapid change of light is analyzed.The experimental results show that this mathematical model has high reliability and practicability.

关 键 词：光伏系统 扰动步长 光辐照强度 MPPT 扰动步长模型 

分 类 号：TM615[电气工程—电力系统及自动化]