A comparison of quasi-Z-source inverters and conventional two-stage inverters for PV applications
A comparison of quasi-Z-source inverters and conventional two-stage inverters for PV applications
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光伏应用准 Z 源逆变器与传统两级逆变器的比较
DOI：
10.1080/09398368.2017.1317136
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发表时间：
2017
期刊：
影响因子：
0.5
通讯作者：
R. Kennel
中科院分区：
文献类型：
--
作者：
A. Ayad;R. Kennel
本文对基于现场可编程门阵列 (FPGA) 的光伏 (PV) 应用的单级准 Z 源逆变器 (qZSI) 和传统两级逆变器进行了比较研究。比较是根据逆变器开关上的电压应力、所需的有源和无源元件、瞬态和稳态性能以及逆变器效率进行的。介绍并讨论了两种逆变器的建模、理论概念和控制设计。此外，还介绍了无源元件要求和逆变器损耗分析。进行实验研究以验证所提出的逆变器。值得注意的是，当逆变器增益达到 2 时，qZSI 的逆变器开关电压应力低于传统的两级逆变器。结果还表明，在相同的工作条件下，qZSI 的瞬态和稳态性能与两级逆变器的瞬态和稳态性能相当。然而，qZSI 显示出较低的 THD 值，从而减少了输出滤波器的尺寸和成本。此外，效率测试是根据两个逆变器的计算和实际测量来完成的。结果表明，qZSI 显示出比传统解决方案更高的效率。根据这些观察结果，qZSI 为光伏应用提出了一种有吸引力的替代方案。
This paper presents a comparative study between the single-stage quasi-Z-source inverter (qZSI) and the conventional two-stage inverter for Photovoltaic (PV) applications based on an filed programmable gate array (FPGA). The comparison is conducted in terms of the voltage stress on the inverter switches, the required active and passive components, the transient and the steady state performances, and the inverters efficiency. The modelling, the theoretical concepts, and the control design for both inverters are presented and discussed. Moreover, the passive components requirement and the inverters losses analysis are introduced. Experimental investigations are conducted to verify the proposed inverter. It is noted that the qZSI shows a lower voltage stress on the inverter switches than the conventional two-stage inverter when the inverter gain up to 2. The results also demonstrate that the transient and the steady state performances of qZSI are comparable with the ones of the two-stage inverter under the same operating conditions. However, the qZSI shows lower THD values which in turn result in a reduced output filter size and cost. Additionally, the efficiency test is done based on calculations and real measurements for both inverters. The results point out that the qZSI shows higher efficiency than the conventional solution. Based on these observations, the qZSI proposes an attractive alternative for PV applications.
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DOI：
10.1109/ecce.2009.5316399
发表时间：
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期刊：
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影响因子：
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发表时间：
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期刊：
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