A simple 60-pulse voltage source inverter using voltage reinjection strategy to improve voltage harmonics for high-power local loads

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-09-18 DOI:10.1049/pel2.12773

Saeed Najafpour, Reza Ghandehari

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引用次数: 0

Abstract

The voltage reinjection strategy is an effective solution to improve the voltage quality of the voltage source inverters for high-power applications. In this article, the fundamentals of voltage reinjection strategy are analyzed to reduce voltage harmonics of the output voltage. Then, a novel voltage reinjection circuit is proposed which can generate a 5-level voltage to be injected on the voltages of the DC sources. The reinjected voltage can create a 60-pulse voltage waveform for a three-phase load. Turn ratio optimization of the reinjection transformer has a significant effect on the improvement of the harmonic situation of the output voltage. Furthermore, the proposed reinjection circuit provides ZVS conditions for the main switches to reduce switching losses considerably. The simulation results indicate that the proposed reinjection circuit can reduce the output voltage THD to 3.16% without any type of filter or modulation, and the load variation does not have a considerable effect on the voltage quality. The experimental results approve the analytical trend and simulation process and also confirm the reinjection circuit performance. According to the results, the proposed method has generated a semi-sinusoidal voltage waveform with $T H D_{V} = 3.78 %$ in the laboratory.

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利用电压再注入策略改善大功率本地负载电压谐波的简单 60 脉冲电压源逆变器

电压再注入策略是改善大功率应用中电压源逆变器电压质量的有效解决方案。本文分析了电压再注入策略的基本原理，以减少输出电压的电压谐波。然后，提出了一种新颖的电压再注入电路，该电路可产生 5 级电压，并注入直流源电压。再注入电压可为三相负载产生 60 脉冲电压波形。优化再注入变压器的匝比对改善输出电压的谐波情况有显著效果。此外，建议的再注入电路为主开关提供了 ZVS 条件，从而大大降低了开关损耗。仿真结果表明，在不使用任何滤波器或调制器的情况下，建议的再注入电路可将输出电压总谐波失真降至 3.16%，且负载变化对电压质量的影响不大。实验结果验证了分析趋势和仿真过程，也证实了回注电路的性能。根据实验结果，所提出的方法在实验室中产生了 T H D V = 3.78 % $THD_{V}=3.78\%$ 的半正弦电压波形。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.