A Novel Capacitor-Voltage Balancing Strategy for Double-Y STATCOM Under Unbalanced Operations
Artikel i vetenskaplig tidskrift, 2021
This paper proposes a novel capacitor-voltage balancing strategy for the double-Y MMC STATCOM operated under unbalanced current conditions of the system. The proposed method, based on zero-sequence voltage injection, manipulates the current distribution between the converter arms to minimize the converter ratings. The proposed balancing strategy is compared with the classical approach, based on controlling the circulating dc currents. For the same unbalanced conditions, the proposed strategy leads to lower energy rating for the converter as compared with the classical one, while the semiconductor ratings remain the same in both strategies. Theoretical findings are verified through experimental results.
Current distribution
Topology
Legged locomotion
HVDC transmission
STATCOM
Automatic voltage control
Capacitors
double star converter
unbalanced conditions
Power distribution
modular multilevel converters
converter rating
capacitor-voltage balancing
Författare
Ehsan Behrouzian
Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter
Massimo Bongiorno
Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter
Jan Svensson
Hitachi ABB Power Grids
Aravind Mohanaveeramani
Hitachi ABB Power Grids
IEEE Transactions on Industry Applications
0093-9994 (ISSN)
Vol. In PressÄmneskategorier
Övrig annan teknik
Energisystem
Annan elektroteknik och elektronik
DOI
10.1109/TIA.2021.3066093