摘要
基于Matlab/Simulink建立了一个适用于慢动态分析的光伏发电系统模型.在该模型中,基于功率不变原则对直流系统进行了正确合理的等效,使得模型可以在以相量为变量形式的慢动态分析过程得到应用.对占空比扰动最大功率跟踪(MPPT)算法进行了改进,使得自适应步长值在计算过程中收敛得更加稳定,提高计算速度,避免了步长激烈变化可能带来的数值振荡.利用Simulinklevel 2 S函数来实现MPPT算法,提高了接入光伏系统的电力网络仿真的计算速度.仿真结果表明,应用该光伏发电模块得到的计算结果正确,证明了该模块在慢动态研究中的有效性.
A model of PV（photovoltaic） generating system for slow dynamic analysis is built in this paper based on Matlab/Simulink.In this model,based on power equivalent principle,the DC system is simplified to be applied to slow dynamic analysis which takes phasors as its variables.The duty cycle disturbing MPPT（Maximum Power Point Track） algorithm is also improved in order to stabilize the self-adaptive step in the process of calculation,which increases the calculating speed and avoids numeric oscillation.Simulink level 2 S function is employed to implement MPPT algorithm,which improves the calculating speed of the grid PV simulation.The correctness and effectiveness of this model is verified through the simulation results.
出处
《昆明理工大学学报（自然科学版）》
CAS
北大核心
2012年第6期55-61,共7页
Journal of Kunming University of Science and Technology(Natural Science)
基金
云南省自然科学基金项目(14118289)
