光伏发电系统MPPT输出功率采样周期的优化设计  

Sampling Period Optimization Design of Output Power of Photovoltaic Power Generation MPPT Systems

作　　者：彭志辉[1] 和军平[2] 马光[1] 周晨[1] 李峰平[1] 

机构地区：[1]温州大学机电工程学院,浙江省温州市325035 [2]哈尔滨工业大学深圳研究生院,广东省深圳市518055

出　　处：《中国电机工程学报》2012年第34期24-29,5,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50877015);国家国际科技计划项目(0S2012ZR0038);国家教育部博士点基金项目(200802131017)~~

摘　　要：近年来,光伏发电研究主要集中在变换器拓扑结构、最大功率点追踪(maximum power point tracking,MPPT)和并网发电。但一些实验研究发现,输出功率采样周期对光伏系统性能具有较大的影响。该文以太阳能电池基本电路方程为基础,构建不依赖于变换器及MPPT算法的光伏系统采样周期与光照强度、环境温度、工作电压、工作电流、占空比之间的小信号数学模型,详细分析采样周期在寻优过程中的作用机理。仿真和实验结果表明,该构建的光伏系统采样周期数学模型具有较高的可靠性和实用性。The photovoltaic power research mainly focuses on the converter topology structure,the maximum power tracking（MPPT） and grid generation in recent years.However,some experimental results have shown that the sampling period of the output power has a major influence on the PV system.Based on the basic circuit equations of the solar cell,This paper constructed the small signal mathematical model of PV system,which does not rely on the converter topology structure,MPPT algorithm,sampling period,light intensity,ambient temperature and duty cycle,and analyze in detailed the sampling period working mechanism in the optimization process.By analyzing the transient characteristics of solar cells in detail,it is found that the mathematical model of the sampling period of the output power does not depend on the converter topology and the MPPT algorithm.The simulation and experimental results demonstrate that the constructed mathematical model of the sampling period of PV system output power is correct and effective.

关 键 词：光伏系统 采样周期 最大功率点追踪 小信号模型 动态特性 

分 类 号：TM91[电气工程—电力电子与电力传动]