用于独立光伏系统的多串七电平逆变器

P. Vivek, P. Kanakasabapathy
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引用次数: 8

摘要

提出了一种采用七电平逆变器的单相独立两级光伏系统。该系统的第一级转换采用基本升压变换器,以确保最大功率点跟踪(MPPT)和逆变器直流母线电压调节。混合七电平逆变器与较少数量的组件被用作转换的第二阶段,提供所需的幅度和频率的交流电压。用于逆变器的调制方案是电平移位多载波脉宽调制(LS-PWM)。中央控制器的设计目的是使直流母线电压保持在参考带内,而不受太阳辐照度和负载需求变化的影响。通过仿真验证了该逆变器在光伏系统中的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multistring seven-level inverter for standalone photovoltaic systems
This paper presents a single phase standalone two stage photovoltaic (PV) system using seven level inverter. The first stage of conversion in the proposed system uses basic boost converter which ensure Maximum power point tracking(MPPT) and inverter dc bus voltage regulation. A hybridised seven level inverter with less number of components is used as the second stage of conversion that provides ac voltage of required magnitude and frequency. The modulation scheme used for the inverter is level shifted multi carrier pulse width modulation (LS-PWM). A central controller is designed to maintain the dc bus voltages within the reference band irrespective of variations in solar irradiance and load demand. The validity of proposed inverter in PV system is verified through simulation.
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