TY - GEN
T1 - Sliding Mode observer of submodular capacitor voltages in modular multilevel converter
AU - Al-Wedami, Amal
AU - Al-Hosani, Khalifa
AU - Beig, Abdul R.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015
Y1 - 2015
N2 - Modular Multilevel Converter (MMC) has attracted the attention of researchers particularly those working in the area of transformer-less medium to high power conversion. This topology has adopted several interesting operational characteristics such as modularity, voltage scalability, multilevel waveform capability, safe failure management, redundancy and high reliability. MMC consists of cascaded connection of multiple, identical and individually controlled bidirectional halfbridge sub modules with floating DC capacitors. A significant aspect of MMC operation is maintaining the total sum of capacitor voltages of the sub modules per arm equal to the input DC bus voltage and ensuring equal voltage sharing among the submodules. In this paper, sliding mode observer is introduced to complement a Phase shifted Pulse Width Modulation based capacitor voltage balancing controller for a three-level MMC. Also, the mathematical model of MMC, voltage balancing control algorithm, and sliding mode submodular capacitor voltage observer are included in this paper. Finally, the proposed observer design is verified through computer simulation.
AB - Modular Multilevel Converter (MMC) has attracted the attention of researchers particularly those working in the area of transformer-less medium to high power conversion. This topology has adopted several interesting operational characteristics such as modularity, voltage scalability, multilevel waveform capability, safe failure management, redundancy and high reliability. MMC consists of cascaded connection of multiple, identical and individually controlled bidirectional halfbridge sub modules with floating DC capacitors. A significant aspect of MMC operation is maintaining the total sum of capacitor voltages of the sub modules per arm equal to the input DC bus voltage and ensuring equal voltage sharing among the submodules. In this paper, sliding mode observer is introduced to complement a Phase shifted Pulse Width Modulation based capacitor voltage balancing controller for a three-level MMC. Also, the mathematical model of MMC, voltage balancing control algorithm, and sliding mode submodular capacitor voltage observer are included in this paper. Finally, the proposed observer design is verified through computer simulation.
KW - Capacitor voltage balancing control
KW - Component
KW - Modular multilevel converter
KW - Sliding mode observer
UR - http://www.scopus.com/inward/record.url?scp=84964008520&partnerID=8YFLogxK
U2 - 10.1109/RASM.2015.7154650
DO - 10.1109/RASM.2015.7154650
M3 - Conference contribution
AN - SCOPUS:84964008520
T3 - 2015 International Workshop on Recent Advances in Sliding Modes, RASM 2015
BT - 2015 International Workshop on Recent Advances in Sliding Modes, RASM 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - International Workshop on Recent Advances in Sliding Modes, RASM 2015
Y2 - 9 April 2015 through 11 April 2015
ER -