Model predictive controller for grid-connected photovoltaic based on quasi-Z-source inverter
Model predictive controller for grid-connected photovoltaic based on quasi-Z-source inverter
复制标题
基于准Z源逆变器的并网光伏模型预测控制器
DOI：
10.1109/sled-precede.2013.6684492
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
R. Kennel
中科院分区：
文献类型：
--
作者：
A. Ayad;R. Kennel
针对采用准Z源逆变器（QZSI）的光伏并网发电系统，提出了模型预测控制器（MPC）的设计方法。QZSI为光伏阵列提供了一种更便宜、更简单的单级方法。采用传统的QZSI控制方式，需要对直流侧和交流侧分别进行控制。PI控制器在QZSI中得到了广泛的应用，但PI控制器仍存在一定的局限性，如系统的非线性。MPC的主要思想是基于QZSI的模型，并且使用该模型，预测输出电流在一段时间内的未来行为。使用成本函数，评估预测并选择要应用的最佳切换状态。使用MPC，基于最大PV可用功率调节输出电流。基于相同的成本函数来操纵QZSI电感器电流和电容器电压。利用MATLAB simulink的仿真结果证实了该控制器的有效性和MPC的优点，作为一个简单而强大的方法，电力电子变换器，因为它不需要额外的调制技术或内部控制回路。
This paper presents model predictive controller (MPC) design for grid-connected Photovoltaic system using quasi-Z-source inverter (QZSI). The QZSI provides a cheaper, simpler, and one stage approach for PV arrays. Using traditional control for QZSI, the two sides (DC-side and AC-side) should be controlled separately. PI controller has been extensively used for QZSI but still PI has some limitations such as system nonlinearity. The main idea of MPC is based on the model of the QZSI and using this model, the future behavior of the output current is predicted over a period of time. Using a cost function, the predictions are assessed and the best switching state is selected to be applied. Using MPC, the output current is regulated based on the maximum PV available power. The QZSI inductor current and capacitor voltage are manipulated based on the same cost function. The simulation results using MATLAB simulink confirm the effectiveness of this controller and the advantages of the MPC as a simple and powerful method for power electronics converter as it does not need additional modulation techniques or internal control loops.