基于SAA的光伏系统MPPT技术研究

Research on Maximum Power Point Tracking Based on Simulate Anneal Arithmetic

太阳电池在均匀和非均匀光照下表现出不同的特性。该文分别对太阳电池工作在均匀和非均匀光照下运行进行Matlab Simulink仿真,在得出特性曲线的基础上分析了光伏发电系统的最大功率点跟踪(MPPT)技术。在增量电导法的基础上引入SAA(Simulate Anneal Arithmetic)以提高MPPT在非均匀光照下的的跟踪精度。最后,对光伏阵列跟踪进行SAA策略仿真,并与基于增量电导法和全局搜索MPPT的仿真结果进行对比。结果表明,在增量电导法的基础上加入SAA,能够较准确地跟踪光伏阵列非均匀光照下的最大功率点,达到稳定的MPPT控制。

Solar ceils under uniform and non-uniform illumination show different features. The results of Matlab Simulink^simulations of solar cell under uniform and non-uniform illumination are presented re- spectively. And MPPT technology is analysized on the basis of the characteristic curve obtained. SAA （Simulate Anneal Arithmetic） is applied in incremental conductance to improve the tracking precision of the MPPT under non-uniform illumination. Finally, a simulation of SAA is conducted and compared to the result of the simulation using incremental conductance and global MPPT. The results indicate that in- cremental conductance join with SAA can accurately track the maximum power point of PV array under non-uniform illumination, stabilizing the MPPT control.