Abstract
The high and low order dc-link current ripple can be caused under balanced and unbalanced ac grid/load conditions for three-phase modular multilevel converters (MMCs). To enhance the dc-link current quality, this paper proposes an additional-levels-based control (ALC) method, where the conventional modulation is employed to generate ac-side voltage levels and a model predictive control (MPC) algorithm with reduced calculation burden is developed to produce additional levels for dc-link current performance improvement. Through evaluating the cost function of MPC, the proposed method can reduce both high and low order dc-link current ripple for the MMC. Meanwhile, it avoids disturbing the quality of the ac-side voltage. Besides, the calculation burden of the proposed method is independent of the submodules’ number per arm. The validity and effectiveness of the proposed method have been verified by simulation and experimental results.© 2017 Elsevier Inc. All rights reserved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Electrical Power & Energy Systems
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
