The star-switched MMC (SSMMC): a hybrid VSC for HVDC applications

Woldegiorgis, Dereje Lemma; Outram, John; Amankwah, Emmanuel K.; Trainer, David; Clare, Jon C.

Abstract

This paper presents a new hybrid VSC topology (the Star-Switched MMC) – suitable for HVDC applications. The basic structure and operating principles of the topology are described. Control strategies that regulate the power exchanged between the VSC, the AC network and the DC network are presented. A modulation strategy ensuring appropriate switching of the individual chain-link sub-modules and a capacitor voltage balancing algorithm that ensures the capacitor voltages are maintained within the required tolerance are discussed. Results from a simulation model are presented to validate the expected performance of the converter and the proposed control schemes.

Citation

Woldegiorgis, D. L., Outram, J., Amankwah, E. K., Trainer, D., & Clare, J. C. (2016). The star-switched MMC (SSMMC): a hybrid VSC for HVDC applications.

• Conference Name: 8th IET International Conference on Power Electronics, Machines and Drives 2016 (PEMD 2016)
• End Date: Apr 22, 2016
• Acceptance Date: Oct 26, 2015
• Publication Date: Apr 20, 2016
• Deposit Date: Feb 2, 2017
• Publicly Available Date: Feb 2, 2017
• Peer Reviewed: Peer Reviewed
• Keywords: HVDC, modular multilevel, Efficiency, Capacitor voltage control, Offshore
• Public URL: https://nottingham-repository.worktribe.com/output/784593
• Publisher URL: http://ieeexplore.ieee.org/document/7739331/
• Additional Information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.