Journal of South China University of Technology(Natural Science) >

2018 , Vol. 46 >Issue 1: 33 - 40

DOI: https://doi.org/10.3969/j.issn.1000-565X.2018.01.005

Power & Electrical Engineering

The Neutral Point Potential Regulation of Three-Level Inverter Based on the Deadbeat Control Algorithm

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  • 1． School of Electric Power，South China University of Technology，Guangzhou 510640，Guangdong，China; 2． Key Laboratory of Clean Energy Technology of Guangdong Province，South China University of Technology，Guangzhou 510640，Guangdong，China; 3． School of Electrical Engineering ＆ Intelligentization，Dongguan University of Technology，Dongguan 523808，Guangdong，China
姚远(1990-)，男，博士生，主要从事变流器方面的研究． E-mail:Heinzyao@ outlook． com

Received date: 2017-03-08

  Revised date: 2017-09-11

  Online published: 2017-12-01

Supported by

Supported by the Project of Public Welfare Research and Capacity Building of Gunagdong Province(2015A010106018)

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Abstract

In this paper an exploration is performed into midpoint potential migration of NPC three-level inverter and the midpoint potential fluctuation． On the basis of the analysis of the voltage vectors and the midpoint potential，a mathematical model is constructed under the deadbeat control framework． In order to keep the ability to fix the drifted midpoint potential，the virtual voltage vector method is employed． In the proposed algorithm，the vectors applied to modify the midpoint potential are evaluated accordingly． Compared with the conventional algorithm，the time needed to fix the midpoint potential is decreased in this proposed algorithm，and the ability to fix the midpoint potential is in-sensitive to the modulation index． Moreover，the proposed algorithm can eliminate the oscillation of the midpoint po-tential． The validity of the proposed algorithm is verified by the simulation and experiments．

Key words： NPC; three-level inverter; deadbeat control; virtual vector; neutral point potential drifted; neutral point potential oscillation

Cite this article

YAO Yuan KANG Longyun ZHANG Zhi FENG Yuanbin CHENG Jiancai . The Neutral Point Potential Regulation of Three-Level Inverter Based on the Deadbeat Control Algorithm[J]. Journal of South China University of Technology(Natural Science), 2018 , 46(1) : 33 -40 . DOI: 10.3969/j.issn.1000-565X.2018.01.005

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