The Community for Technology Leaders
2012 Third International Conference on Digital Manufacturing & Automation (2012)
Guilin, China China
July 31, 2012 to Aug. 2, 2012
ISBN: 978-1-4673-2217-1
pp: 293-296
ABSTRACT
The equivalent circuit of modular multilevel converter (MMC) is divided into ac-loop and dc-loop. The ac-loop is used to regulate the power exchanged between AC system and MMC, whereas the dc-loop can be used to regulate the internal performance of MMC. In order to fulfill the power control a controller based on proportional resonant (PR) scheme in stationary ¦Á¦Â-frame is designed. A controller based on PR scheme in stationary abc-frame is designed to improve the internal performance of MMC. The proposed controller works well under both balanced and unbalanced AC system. Finally, a simulation model with 71 levels is built to verify the proposed controller.
INDEX TERMS
Harmonic analysis, Reactive power, Capacitors, Mathematical model, Voltage control, Power harmonic filters, Steady-state, stationary frame, Modular multilevel converter, ac-loop, dc-loop, circulating current
CITATION

Z. Yuebin, J. Daozhuo, G. Jie, H. Pengfei and L. Zhiyong, "Control of Modular Multilevel Converter Based on Stationary Frame under Unbalanced AC System," 2012 Third International Conference on Digital Manufacturing & Automation(ICDMA), Guilin, China China, 2012, pp. 293-296.
doi:10.1109/ICDMA.2012.71
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