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Modular Multilevel Converter for Low-Voltage Ride-Through Support in AC Networks

Author

Listed:
  • Victor Ramon França Bezerra de Souza

    (Graduate Program in Electrical and Computer Engineering, Federal University of Rio Grande do Norte, Natal 59064-720, Brazil)

  • Luciano Sales Barros

    (Computer System Department, Federal University of Paraíba, Coronel João Pessoa 58051-900, Brazil)

  • Flavio Bezerra Costa

    (Graduate Program in Electrical and Computer Engineering, Federal University of Rio Grande do Norte, Natal 59064-720, Brazil)

Abstract

New grid-connected systems have imposed additional requirements regarding reliability, power quality, high levels of power processing capacity, and fault support, where power converters have a crucial role in fulfilling these requirements. Overcoming one of these challenges, this paper proposes a new alternative application to improve the low-voltage ride-through (LVRT) support based on the arm impedance employment of the modular multilevel converter (MMC) by attenuating the fault impacts, avoiding overcurrents and overvoltages. This proposal does not require additional hardware or control loops for LVRT support, only using PI controllers. This paper evaluates symmetrical and asymmetrical grid fault impacts on the converter DC side of four converter topologies: two-level voltage source converter topology (2L-VSC), neutral point clamped (NPC), MMC, and 2L-VSC equipped with a DC-chopper, employing the same control structure for the four topologies, highlighting that the MMC contributed better to LVRT improvement under severe grid conditions.

Suggested Citation

  • Victor Ramon França Bezerra de Souza & Luciano Sales Barros & Flavio Bezerra Costa, 2021. "Modular Multilevel Converter for Low-Voltage Ride-Through Support in AC Networks," Energies, MDPI, vol. 14(17), pages 1-12, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5314-:d:622966
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    Cited by:

    1. Chuan Du & Qingzhi Zhang & Shuai Cao, 2022. "A Smart Fault-Tackling Strategy Based on PFTE for AC Three-Phase-to-Ground Faults in the Multi-Terminal HVDC Wind Power Integration System: Further Foundings," Energies, MDPI, vol. 15(3), pages 1-22, January.

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