TY - GEN
T1 - Control strategy to balance operation of parallel connected legs of modular multilevel converters
AU - Pou, Josep
AU - Ceballos, Salvador
AU - Konstantinou, Georgios
AU - Capella, Gabriel J.
AU - Agelidis, Vassilios G.
PY - 2013
Y1 - 2013
N2 - Connecting legs of modular multilevel converters (MMCs) in parallel can assist an MMC-based high-voltage direct current (HVDC) to increase its current ratings and hence overall power handling capability. Consequently, each phase of the MMC would be integrated by several legs or sets of upper and lower arms (ULAs). This paper proposes a current control strategy for each ULA in order to ensure balanced current sharing among them. In addition, each ULA has its own circulating current control that follows a reference obtained from the instantaneous magnitudes of the output current and the modulation signal. All the proposed control actuations do not distort the phase output voltage of the MMC which follows the reference voltage. The performance of the proposed control strategies is evaluated by simulation studies in the PLECS Blockset under MATLAB/Simulink software platform.
AB - Connecting legs of modular multilevel converters (MMCs) in parallel can assist an MMC-based high-voltage direct current (HVDC) to increase its current ratings and hence overall power handling capability. Consequently, each phase of the MMC would be integrated by several legs or sets of upper and lower arms (ULAs). This paper proposes a current control strategy for each ULA in order to ensure balanced current sharing among them. In addition, each ULA has its own circulating current control that follows a reference obtained from the instantaneous magnitudes of the output current and the modulation signal. All the proposed control actuations do not distort the phase output voltage of the MMC which follows the reference voltage. The performance of the proposed control strategies is evaluated by simulation studies in the PLECS Blockset under MATLAB/Simulink software platform.
KW - Circulating current control
KW - Current balance
KW - Modular multilevel converter
KW - Parallel legs
UR - http://www.scopus.com/inward/record.url?scp=84881618236&partnerID=8YFLogxK
U2 - 10.1109/ISIE.2013.6563685
DO - 10.1109/ISIE.2013.6563685
M3 - Conference contribution
AN - SCOPUS:84881618236
SN - 9781467351942
T3 - IEEE International Symposium on Industrial Electronics
BT - 2013 IEEE International Symposium on Industrial Electronics, ISIE 2013
T2 - 2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013
Y2 - 28 May 2013 through 31 May 2013
ER -
