Variable switching point predictive current control of quasi-Z-source inverters
Variable switching point predictive current control of quasi-Z-source inverters
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DOI：
10.1109/apec.2017.7931091
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
A. Ayad;P. Karamanakos;R. Kennel
中科院分区：
文献类型：
--
作者：
A. Ayad;P. Karamanakos;R. Kennel
本文提出了一种准Z源逆变器（qZSI）的变开关点预测电流控制（VSP2CC）。所提出的VSP2CC旨在调节交流侧的电流以及准Z源网络的电感电流和电容电压。不同于先前提出的模型预测控制（MPC）策略的qZSI，与所提出的控制方案的最佳开关位置可以在采样间隔内的任何时刻改变。通过这样做，可以在比采样间隔更短的时间内应用直通状态，这进而导致更低的输出和电感器电流纹波。实验结果，基于FPGA，提供了验证所提出的控制技术。如图所示，与传统MPC相比，所提出的方法导致更低的电感电流纹波和更小的输出电流THD。
This paper presents a variable switching point predictive current control (VSP2CC) for the quasi-Z-source inverter (qZSI). The proposed VSP2CC aims to regulate the current on the ac side as well as the inductor current and capacitor voltage of the quasi-Z-source network. Unlike the previously presented model predictive control (MPC) strategies for the qZSI, with the proposed control scheme the optimal switch position can be changed at any time instant within the sampling interval. By doing so, the shoot-through state can be applied for a shorter time than the sampling interval which in turn results in lower output and inductor currents ripples. Experimental results, based on an FPGA, are provided to verify the proposed control technique. As it is shown, in comparison with the conventional MPC, the proposed method results in lower inductor current ripples and less output current THD.