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Open AccessArticle

Neutral-Point Potential Balancing Control Strategy for Three-Level ANPC Converter Using SHEPWM Scheme

by 1, 1,2,*, 1,2, 1,* and 1
1
School of Electrical Engineering and Automation, Anhui University, Hefei 230601, China
2
National Engineering Laboratory of Energy-Saving Motor and Control Technology, Hefei 230601, China
*
Authors to whom correspondence should be addressed.
Energies 2019, 12(22), 4328; https://doi.org/10.3390/en12224328
Received: 2 September 2019 / Revised: 4 November 2019 / Accepted: 7 November 2019 / Published: 13 November 2019
A selective harmonic elimination pulse width modulation (SHEPWM) control strategy is proposed to balance the neutral-point potential (NP) of a three-level active neutral-point-clamped (ANPC) converter. In this strategy, the chaotic ant colony algorithm (ACA) is adopted to solve the SHEPWM nonlinear equations, which does not require presetting the initial values of solutions and can get multiple solutions in the same modulation index. The influence of different solutions corresponding to the SHEPWM switching states on the NP is different, namely, some make the NP increase and others make the NP decrease. Therefore, the NP balancing can be effectively controlled by choosing appropriate solutions in different fundamental periods. The simulation and experimental results further verify the feasibility and effectiveness of the control strategy. View Full-Text
Keywords: active neutral-point-clamped; neutral-point-clamped converters; elective harmonic elimination; neutral-point potential balancing; ant colony algorithm active neutral-point-clamped; neutral-point-clamped converters; elective harmonic elimination; neutral-point potential balancing; ant colony algorithm
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MDPI and ACS Style

Zhang, Y.; Hu, C.; Wang, Q.; Zhou, Y.; Sun, Y. Neutral-Point Potential Balancing Control Strategy for Three-Level ANPC Converter Using SHEPWM Scheme. Energies 2019, 12, 4328. https://doi.org/10.3390/en12224328

AMA Style

Zhang Y, Hu C, Wang Q, Zhou Y, Sun Y. Neutral-Point Potential Balancing Control Strategy for Three-Level ANPC Converter Using SHEPWM Scheme. Energies. 2019; 12(22):4328. https://doi.org/10.3390/en12224328

Chicago/Turabian Style

Zhang, Yunlei; Hu, Cungang; Wang, Qunjing; Zhou, Yufei; Sun, Yue. 2019. "Neutral-Point Potential Balancing Control Strategy for Three-Level ANPC Converter Using SHEPWM Scheme" Energies 12, no. 22: 4328. https://doi.org/10.3390/en12224328

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