A Comprehensive Analysis of Enhanced DC-Bus Utilization and Reduced Component Count Five-Level Inverter for PV-Grid Integration

IF 4.2 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Industry Applications Pub Date : 2025-01-21 DOI:10.1109/TIA.2025.3532231

Swapan Kumar Baksi;Ranjan Kumar Behera;Utkal Ranjan Muduli

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引用次数: 0

Abstract

Several five-level inverters have limitations, such as low DC-bus voltage utilization and a large number of components. This paper describes a new five-level inverter with a switched capacitor design that aims to address these issues by maximizing the utilization of the DC bus voltage while reducing the component count. The proposed topology includes six active switches, two diodes, a floating capacitor, and a single DC source, with a 50% reduction in bus voltage requirements compared to traditional designs. The level-shifted sine pulse width modulation is employed to produce the switching pulses for the proposed inverter. Following the theoretical analysis, the actual behavior of the switching devices is validated via real-time implementation with the OPALRT 5700 real-time emulator. The superiority of the proposed inverter is tested under various steady-state and dynamic conditions to demonstrate its effectiveness under single-phase open-loop and three-phase photovoltaic (PV)-grid integrated conditions using a comparative analysis. The proposed inverter has a maximum efficiency of 97.75% and output voltage distortion of 26.61%, making it ideal for PV applications.

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一些五电平逆变器存在局限性，如直流母线电压利用率低和元件数量多。本文介绍了一种采用开关电容器设计的新型五电平逆变器，旨在通过最大限度地利用直流母线电压同时减少元件数量来解决这些问题。所提出的拓扑结构包括六个有源开关、两个二极管、一个浮动电容器和一个单直流源，与传统设计相比，对总线电压的要求降低了 50%。拟议的逆变器采用电平偏移正弦脉宽调制来产生开关脉冲。理论分析之后，通过 OPALRT 5700 实时仿真器的实时实施验证了开关器件的实际行为。通过比较分析，在各种稳态和动态条件下测试了拟议逆变器的优越性，以证明其在单相开环和三相光伏（PV）并网条件下的有效性。拟议的逆变器的最高效率为 97.75%，输出电压畸变率为 26.61%，是光伏应用的理想选择。

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

IEEE Transactions on Industry Applications 工程技术-工程：电子与电气

CiteScore

9.90

自引率

9.10%

发文量

747

审稿时长

3.3 months

期刊介绍： The scope of the IEEE Transactions on Industry Applications includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.