无变压器光伏系统用降低共模电压的三相八开关逆变器

Ahmad Syed, S. Kalyani
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引用次数: 3

摘要

在并网光伏(PV)系统中,无变压器逆变器由于体积小、重量轻、成本低而得到广泛应用。然而,共模电压降低是无变压器光伏逆变器最关键的问题之一。此外,已经报道了几种有吸引力的单相无变压器逆变器拓扑结构,以消除基于变换器拓扑结构和调制策略的共模电压。此外,在文献中,具有降低共模电压的三相拓扑结构没有得到很好的研究。本文提出了一种新型的三相八开关逆变器(H8)和相应的调制技术来降低共模电压。它源自标准三相(H6)逆变器,但具有不同的工作原理。通过MATLAB/Simulink进行了理论和性能分析,验证了所提出的H8拓扑的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Three-phase eight switch inverter with reduced common mode voltage for transformerless photovoltaic systems
In grid connected photovoltaic (PV) systems transformerless inverters are widely used due to reduced size, weight and cost. However, common mode voltage reduction is one of the most key issues for transformerless PV inverters. In addition, several attractive single-phase transformerless inverter topologies have been reported to eliminate the common mode voltage based on converter topology and modulation strategy. Moreover, in literature three-phase topologies with reduced common mode voltage are not well investigated. In this paper, a novel three phase eight switch inverter (H8) and a corresponding modulation technique is proposed to reduce the common mode voltage. It is derived from the standard three-phase (H6) inverter but has different operating principles. Theoretical and performance analyses are carried out via MATLAB/Simulink to validate the effectiveness of the proposed H8 topology.
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