Comparative analysis of carrier schemes for PWM in multilevel PUC inverter for PV applications

2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET) Pub Date : 2016-02-29 DOI:10.1109/ICDRET.2016.7421528

M. Tariq, M. T. Iqbal, A. Iqbal, M. Meraj, Muhammad M. Roomi, Md Shafquat Ullah Khan

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引用次数: 25

Abstract

This paper presents an evaluation of two modulation methods for the seven-level packed U cell (PUC) inverter for photovoltaic applications. The PUC is a multilevel inverter which has less number of switching devices than the conventional multilevel inverters. The PUC inverter is in modular configuration consisting of one U-cell and four additional power switches, one dc link and an auxiliary capacitor. A U cell is called an arrangement of two power switches and one flying or clamping capacitor. In this paper, the level-shifted (LS-PWM) and phase-shifted PWM (PS-PWM) for triangular carrier are presented and compared. Harmonic analysis for both the cases has been performed and phase-shifted triangular carrier has been found to have the minimum harmonics. The difference in harmonics of the two modulation methods for the triangular carrier is confirmed by the theoretical approach and verified by simulation in MATLAB® Simulink environment, and simulation results are presented and discussed in the paper.

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光伏多电平PUC逆变器PWM载波方案的比较分析

本文介绍了用于光伏应用的七电平封装U单元(PUC)逆变器的两种调制方法。PUC是一种多电平逆变器，它比传统的多电平逆变器具有更少的开关器件。PUC逆变器采用模块化配置，由一个U-cell和四个额外的电源开关、一个直流链路和一个辅助电容器组成。U单元被称为两个电源开关和一个飞行或箝位电容器的排列。本文提出并比较了三角载波的电平移PWM (LS-PWM)和相移PWM (PS-PWM)。对这两种情况进行了谐波分析，发现相移三角载波具有最小的谐波。通过理论方法确定了两种调制方法对三角形载波的谐波差异，并在MATLAB®Simulink环境中进行了仿真验证，给出了仿真结果并进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)

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