摘要
分析了一种单相光伏并网发电仿真系统。根据光伏电池的数学模型建立了光伏阵列的仿真模型,采用变步长扰动观察法实现最大功率点跟踪控制,引入电网电压前馈的双闭环控制策略实现并网控制。基于Matlab仿真平台,搭建了系统仿真模型,仿真结果表明光伏电池输出功率能很好的保持在最大功率点,直流母线电压保持稳定,逆变器输出电流与电网电压同频同相,真正实现了并网,提高了电能质量。
A simulation system for single-phase grid-connected PV powergeneration control is ananyzed. Establishes simulation model based on the mathmatical model of PV array, adopts variable-step perturbation and observation method to realize max power point tracking technology and introduce the double-closed loop control for feed-forward grid voltage control to grid- connected control. The simulation system model has benn constructed by using Matlab, and the simulation result shows that the output power of PV model kept at MPP, DC busbar voltage keeps stabilit and the frequency and phase of the inverter output current are the same with those of the grid voltage. Thus it is really realized the grid connected and imploved power quality.
出处
《电子设计工程》
2014年第17期59-62,共4页
Electronic Design Engineering
基金
大型风力发电机组并网控制关键技术研究(1011GKCA031)
异构传输网络生存性研究(1010RJZA040)
关键词
光伏并网系统
最大功率点跟踪
双闭环控制
电压前馈
photovoltaic grid-connected system
MPPT
double-closed loop control
voltage feel-forward
