摘要
为提高立方星光伏系统的效率,针对太空光照强度和温度等环境因素连续变化的特点,提出一种适用于立方星最大功率点追踪的控制策略。建立了立方星光伏源及功率变换器的小信号模型,通过分析最大功率点附近的小信号模型,对扰动观察法的扰动周期和扰动步长两个参数进行优化,从而保证系统的稳定性和防止光照强度快速变化时追踪误判。通过Matlab/Simulink对立方星光伏系统建模仿真,结果表明此方法可有效改善传统方法的不足,提升立方星光伏系统的效率。
In order to improve the efficiency of the photovoltaic system of CubeSat, a control strategy which was suitable for the tracking of the maximum power point of CubeSat was proposed in view of the continuous change of the environmental factors such as the space light intensity and temperature. A small signal model of the CubeSat photovoltaic source and power converter was established. By analyzing the small signal model near the maximum power point, the perturbation period and step length of the perturbation and observation method were optimized to ensure the stability of the system and prevent misjudgment when the light intensity changed rapidly. The modeling and simulation of the CubeSat photovoltaic system built by Matlab/Simulink shows that this method can improve the deficiencies of the traditional methods effectively and improve the efficiency of the solar energy utilization of the CubeSat.
作者
黄雨晨
李剑锋
张翔
HUANG Yu-chen;LI Jian-feng;ZHANG Xiang(School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing Jiangsu 210094, China)
出处
《电源技术》
CAS
北大核心
2019年第8期1366-1369,共4页
Chinese Journal of Power Sources
基金
南京理工大学自主科研专项(30916011101)
关键词
MPPT
立方星
光伏系统
小信号模型
扰动观察法
MPPT
CubeSat
photovoltaic system
small signal model
perturbation observation method
