摘要
光伏发电是利用太阳能资源的重要方式,当光伏阵列输出电能大于负载所需且蓄电池满充时,光伏发电系统转入恒压工作模式。针对光伏电池输出特性,推出光伏发电系统等效模型,根据恒压工作模式下系统控制框图,推导出控制电路传递函数,进而分析了光照强度、温度等环境因素以及元件寄生参数对系统稳定运行的影响,简化满足系统稳定运行要求的表达式,并计算出系统稳定时的PI参数范围。最后,通过Matlab仿真验证所求PI参数范围的正确性。
Photovoltaic power generation is an important way of solar energy resource utilization.When the output power of the photovoltaic array is greater than the load requirement and the battery is fully⁃charged,the photovoltaic power generation system is transformed to the constant voltage operation mode.According to the output characteristics of photovoltaic cells,the equivalent model of photovoltaic power generation system is proposed.And then,the transfer function of control circuit is derived on the basis of the system control block diagram under constant voltage operation mode.Furthermore,the influence of environmental factors such as light intensity,temperature and parasitic parameters of components on the stable operation of the system is analyzed,the expression meeting the requirements of stable operation of the system is simplified,and the PI parameter range when the system is stable is calculated.Finally,the correctness of the range of PI parameters is verified by Matlab simulation.
作者
刘少帅
张晓锋
夏益辉
李耕
LIU Shaoshuai;ZHANG Xiaofeng;XIA Yihui;LI Geng(College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China)
出处
《现代电子技术》
北大核心
2020年第21期114-118,共5页
Modern Electronics Technique
基金
国家自然科学基金(51507183)。
关键词
恒压控制
光伏发电系统
稳定性
寄生参数
传递函数
PI参数
constant voltage control
photovoltaic power generation system
stability
parasitic parameter
transfer function
PI parameter
