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MMC Capacitor Voltage Decoupling and Balancing Controls.

Authors :
Saad, Hani
Guillaud, Xavier
Mahseredjian, Jean
Dennetiere, Sebastien
Nguefeu, Samuel
Source :
IEEE Transactions on Power Delivery; Apr2015, Vol. 30 Issue 2, p704-712, 9p
Publication Year :
2015

Abstract

A modular multilevel converter control system, based on converter energy storage, is proposed in this paper for two different control modes: active power and dc voltage. The proposed control system decouples the submodule (SM) capacitor voltages from the dc bus voltage. One of the practical applications is the management of active redundant SMs. A practical HVDC system with 401-level MMCs, including 10% redundancy in MMC SMs, is used for validating and demonstrating the advantages of the proposed control system. This paper also presents a novel capacitor voltage balancing control based on \max–\min functions. It is used to drastically reduce the number of switchings for each SM and enhances computational efficiency. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
08858977
Volume :
30
Issue :
2
Database :
Complementary Index
Journal :
IEEE Transactions on Power Delivery
Publication Type :
Academic Journal
Accession number :
101734307
Full Text :
https://doi.org/10.1109/TPWRD.2014.2338861