Abstract
Considering the development of the hybrid wind and solar photovoltaic generation and smart grid, Active Front-End (AFE) converters for high-power applications are facing significant opportunities and challenges related to power quality and efficiency. The Pre-programmed Pulse-Width Modulation (PPWM) techniques can strictly control the harmonic spectrum of a specified voltage or current waveform generated by a high-power AFE converters, and have been extensively applied to reduce or even eliminate the harmonic distortion with low switching losses for high-power converters in order to deal with these issues aforementioned. For the PPWM techniques with low switching frequency, Selective Harmonic Elimination (SHE) and Selective Harmonic Mitigation (SHM) have been the prevailing solutions and gain widespread popularity, among which SHM can provide further control of the harmonic spectrum in cases of similar switching losses to SHE. Over the past several decades, the applications of SHE and SHM have been extended to high-power AFE converters. Thus, the aim of this study is to provide a comprehensive literature review regarding their various formulations, solving algorithms, and existing problems to high-power AFE converters. In addition, the suggestions for future applications of PPWM in high-power AFE converters are also discussed.
Highlights
High-power Active Front-End (AFE) converter is a very popular and significant topic in modern power electronics, especially considering the development of the hybrid wind and solar photovoltaic generation and smart grid [1–6]
This literature review provides a greater understanding of programmed pulse-width modulation (PPWM) techniques as the attractive modulation techniques for AFE converters in high-power applications
The PPWM formulations for different output multilevel waveforms and their respective characteristics play a significant role in determining the complexity of optimization problem in PPWM techniques and achieving feasible solutions of switching angles
Summary
High-power AFE converter is a very popular and significant topic in modern power electronics, especially considering the development of the hybrid wind and solar photovoltaic generation and smart grid [1–6]. Modulation techniques are widely used to meet the rise in demand for high-power AFE converters, which require power losses have to be kept below acceptable limits of specific grid codes based on high-power AFE converters and the switching losses need to be reduced as much as possible. Such a limited switching frequency (normally a few hundreds of hertzs) will produce output voltage/current waveforms with high distortion. A suitable modulation technique should be determined to reduce the harmonic distortion content in the power system [38–44]
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