Power module voltage balancing method for a ±350 kV/ 1000 MW modular multilevel converter

In this paper, a power module capacitor voltage balancing method is presented for a ±350 kV/ 1000 MW modular multilevel converter (MMC) oriented for a back-to-back grid interconnecting project. In this method, a Balancing Adjusting Number (BAN) is proposed to adjust the voltage balancing effect and the switching frequency of the power modules. An accurate switching frequency calculation method is also presented. Verification results show the effectiveness of the proposed voltage balancing method and the correctness of the switching frequency calculation method.

[1]  Jean Mahseredjian,et al.  Real-Time Simulation of MMCs Using CPU and FPGA , 2015, IEEE Transactions on Power Electronics.

[2]  Vijay B. Borghate,et al.  A Simplified Nearest Level Control (NLC) Voltage Balancing Method for Modular Multilevel Converter (MMC) , 2015, IEEE Transactions on Power Electronics.

[3]  Ping Wang,et al.  An Inner Current Suppressing Method for Modular Multilevel Converters , 2012, IEEE Transactions on Power Electronics.

[4]  K. Ilves,et al.  Steady-State Analysis of Interaction Between Harmonic Components of Arm and Line Quantities of Modular Multilevel Converters , 2012, IEEE Transactions on Power Electronics.

[5]  Rainer Marquardt,et al.  A new AC/AC multilevel converter family , 2005, IEEE Transactions on Industrial Electronics.

[6]  Kai Zhang,et al.  An Improved Control System for Modular Multilevel Converters with New Modulation Strategy and Voltage Balancing Control , 2015, IEEE Transactions on Power Electronics.

[7]  Maryam Saeedifard,et al.  Reduced switching-frequency voltage-balancing strategies for modular multilevel HVDC converters , 2013, 2014 IEEE PES General Meeting | Conference & Exposition.

[8]  P. L. Francos,et al.  INELFE — Europe's first integrated onshore HVDC interconnection , 2012, 2012 IEEE Power and Energy Society General Meeting.

[9]  Wenjing Liu,et al.  Accelerated Model of Modular Multilevel Converters in PSCAD/EMTDC , 2013, IEEE Transactions on Power Delivery.

[10]  Zhe Chen,et al.  A Control Method for Voltage Balancing in Modular Multilevel Converters , 2014, IEEE Transactions on Power Electronics.

[11]  Marc Hiller,et al.  Modulation, Losses, and Semiconductor Requirements of Modular Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[12]  Reza Iravani,et al.  FPGA-based Implementation of Modular Multilevel Converter Model for Real-time Simulation of Electromagnetic Transients , 2013 .