Piecewise pulse-width modulation for neutral-point current reduction in NPC inverter

IF 1.7 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IET Power Electronics Pub Date : 2025-01-17 DOI:10.1049/pel2.70000

Mikhail Savastianov, Keyue Smedley

引用次数: 0

Abstract

Effective neutral-point balancing in a neutral-point-clamped inverter can yield substantial benefits, including cost reduction and efficiency improvement for the system. This article proposes a new piecewise pulse-width modulation designed to reduce low-frequency oscillations of the neutral-point current without compromising the inverter power losses. The proposed piecewise modulation is simple to implement as it has one reference signal per phase. The performance of the proposed modulation is validated through comprehensive comparisons with alternative methods. The obtained simulation and experimental results demonstrate the effectiveness of the proposed piecewise modulation.

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用于NPC逆变器中性点电流减小的分段脉宽调制

在中性点箝位逆变器中有效的中性点平衡可以产生实质性的好处，包括降低成本和提高系统效率。本文提出了一种新的分段脉宽调制，旨在减少中性点电流的低频振荡而不影响逆变器的功率损耗。所提出的分段调制是简单的实现，因为它每相位有一个参考信号。通过与替代方法的综合比较，验证了所提出调制的性能。仿真和实验结果验证了分段调制的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IET Power Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

5.50

自引率

10.00%

发文量

195

审稿时长

5.1 months

期刊介绍： IET Power Electronics aims to attract original research papers, short communications, review articles and power electronics related educational studies. The scope covers applications and technologies in the field of power electronics with special focus on cost-effective, efficient, power dense, environmental friendly and robust solutions, which includes: Applications: Electric drives/generators, renewable energy, industrial and consumable applications (including lighting, welding, heating, sub-sea applications, drilling and others), medical and military apparatus, utility applications, transport and space application, energy harvesting, telecommunications, energy storage management systems, home appliances. Technologies: Circuits: all type of converter topologies for low and high power applications including but not limited to: inverter, rectifier, dc/dc converter, power supplies, UPS, ac/ac converter, resonant converter, high frequency converter, hybrid converter, multilevel converter, power factor correction circuits and other advanced topologies. Components and Materials: switching devices and their control, inductors, sensors, transformers, capacitors, resistors, thermal management, filters, fuses and protection elements and other novel low-cost efficient components/materials. Control: techniques for controlling, analysing, modelling and/or simulation of power electronics circuits and complete power electronics systems. Design/Manufacturing/Testing: new multi-domain modelling, assembling and packaging technologies, advanced testing techniques. Environmental Impact: Electromagnetic Interference (EMI) reduction techniques, Electromagnetic Compatibility (EMC), limiting acoustic noise and vibration, recycling techniques, use of non-rare material. Education: teaching methods, programme and course design, use of technology in power electronics teaching, virtual laboratory and e-learning and fields within the scope of interest. Special Issues. Current Call for papers: Harmonic Mitigation Techniques and Grid Robustness in Power Electronic-Based Power Systems - https://digital-library.theiet.org/files/IET_PEL_CFP_HMTGRPEPS.pdf