A robust hybrid method for maximum power point tracking in photovoltaic systems
A robust hybrid method for maximum power point tracking in photovoltaic systems
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DOI：
10.1016/j.solener.2013.05.016
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发表时间：
2013-08
期刊：
影响因子：
6.7
通讯作者：
M. Moradi;S. Tousi;Milad Nemati;N. S. Basir;N. Shalavi
中科院分区：
文献类型：
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作者：
M. Moradi;S. Tousi;Milad Nemati;N. S. Basir;N. Shalavi
本文提出了一种新的光伏发电系统最大功率点跟踪的混合方法。该方法结合离线和在线两种方法来估计变换器在最大功率点的占空比。在离线阶段，温度和辐射强度是系统的输入，以太阳能电池的解析方程的基础上估计近似的最大功率。这些方程给出了最大功率与温度和辐照度的关系，可以从制造商提供的电池特性或实验中导出。然后，转换器的占空比将估计使用的电路方程的测量戴维南模型的负载和电池。测量戴维南方程的结果在鲁棒性的方法尊重负载和电池的变化。在在线阶段，经典的扰动和观测（P&O）方法将用于微调和跟踪的最大功率点。在MATLAB/SIMULINK工作空间中对该方法进行了仿真，并与其它几种最大功率跟踪方法进行了比较。实验结果表明，该方法在跟踪性能和速度方面均优于其他方法。
In this paper a new hybrid method for maximum power point tracking in PV systems has been proposed. This method combines offline and online methods in order to estimate duty cycle of converter in maximum power point. In the offline phase, temperature and radiation intensity are the inputs of the system to estimate the approximate maximum power based on analytical equations of solar cell. These equations which give the relation of maximum power with temperature and irradiation can be derived from characteristics of cell provided by manufacturer or experiments. Afterwards the duty cycle of converter would be estimated using circuit equations of measured Thevenin model of the load and battery. Measuring Thevenin equation results in robustness of method respecting variations of load and battery. In the online phase, the classic perturbation and observation (P&O) method will be utilized for fine tuning and tracking of maximum power point. The proposed method has been simulated in MATLAB/SIMULINK workspace and compared with some other MPPT methods. The results reveal that this hybrid method outperforms other methods in term of performance and speed of tracking.