A Capacitor Voltage Balancing Approach Based on Mapping Strategy for MMC Applications
AbstractThis paper proposes a new strategy to achieve balanced capacitor voltages in modular multilevel converters. Among the possible solutions, centralized arm control approaches are often adopted. These methods require a balancing technique based on a sorted list of the sub-modules according to their capacitor voltages. In order to achieve the aforementioned sorted list, different algorithms have been proposed in literature, such as: Sorting algorithms, max/min approaches, etc. However, the sorting algorithms require a long execution time, while the max/min approaches affect the converter dynamic response during faults. To overcome these issues, a new mapping strategy providing a quasi-sorted list is proposed in this paper. The suggested method is compared in simulation with both the classical bubble sorting algorithm, and the max/min method during both normal and faulty conditions. Moreover, the three methods have been implemented in a Xilinx Zynq-7000 System-on-Chip (SoC) device, in order to analyze the corresponding execution time and the required computational effort. Hardware-in-the-loop results are presented for demonstrating the superior performance of the proposed balancing strategy. View Full-Text
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Ricco, M.; Mathe, L.; Hammami, M.; Franco, F.L.; Rossi, C.; Teodorescu, R. A Capacitor Voltage Balancing Approach Based on Mapping Strategy for MMC Applications. Electronics 2019, 8, 449.
Ricco M, Mathe L, Hammami M, Franco FL, Rossi C, Teodorescu R. A Capacitor Voltage Balancing Approach Based on Mapping Strategy for MMC Applications. Electronics. 2019; 8(4):449.Chicago/Turabian Style
Ricco, Mattia; Mathe, Laszlo; Hammami, Manel; Franco, Francesco L.; Rossi, Claudio; Teodorescu, Remus. 2019. "A Capacitor Voltage Balancing Approach Based on Mapping Strategy for MMC Applications." Electronics 8, no. 4: 449.
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