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A Novel Control Scheme for Multi-Terminal Low-Frequency AC Electrical Energy Transmission Systems Using Modular Multilevel Matrix Converters and Virtual Synchronous Generator Concept

Author

Listed:
  • Mustafa Al-Tameemi

    (Division of Electrical, Electronic and Information Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan)

  • Yushi Miura

    (Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology, 1603-1 Kamitomiokamachi, Nagaoka, Niigata 940-2188, Japan)

  • Jia Liu

    (Division of Electrical, Electronic and Information Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan)

  • Hassan Bevrani

    (Department of Electrical Engineering, Smart/Micro Grids Research Center, University of Kurdistan, Sanandaj 66177-15175, Iran)

  • Toshifumi Ise

    (Nara-Gakuen Incorporated Educational Institution, Nara, 3-12-1 Tatsunokita, Sangou-cho, Ikoma-gun, Nara 636-8503, Japan)

Abstract

This paper proposes a new control scheme for the low frequency AC transmission (LFAC) system aiming at extending the point-to-point configuration to form a multi-terminal electrical energy network. The multi-terminal low frequency ac (MT-LFAC) system configuration is based on the use of modular multilevel matrix converters (M3Cs) and virtual synchronous generator (VSG) control. The M3C is the next ac/ac converter generation, which is used as an interface with the conventional AC network and the LFAC electrical energy system. Application of VSG control is proposed to enable proper power sharing, to provide synchronization of each terminal, and frequency stabilization, thus, to offer multiterminal forming capability. Two different operation modes are applied in the system to damp the frequency deviation after a dynamic perturbation, which provides additional stabilization feature to the VSG. Frequency restoration mode and commanded mode of power sharing are applied as dynamic states to validate the robustness of the VSG control system. Besides, to solve the negative impact of low X/R ratio in the LFAC electrical energy system, we enhance the VSG control by proposing a virtual-impedance-based solution, which increases the output total impedance on the low frequency side and prevents the coupling between P and Q . The operation of the proposed system is examined by simulation results with a precise model of M3Cs in the PSCAD/ EMTDC software environment (version 4.2.1, Winnipeg, MB, Canada).

Suggested Citation

  • Mustafa Al-Tameemi & Yushi Miura & Jia Liu & Hassan Bevrani & Toshifumi Ise, 2020. "A Novel Control Scheme for Multi-Terminal Low-Frequency AC Electrical Energy Transmission Systems Using Modular Multilevel Matrix Converters and Virtual Synchronous Generator Concept," Energies, MDPI, vol. 13(3), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:747-:d:318218
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    References listed on IDEAS

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    1. Achara Pichetjamroen & Toshifumi Ise, 2016. "A Proposal on Low Frequency AC Transmission as a Multi-Terminal Transmission System," Energies, MDPI, vol. 9(9), pages 1-16, August.
    2. Miguel Moranchel & Emilio Bueno & Inés Sanz & Francisco J. Rodríguez, 2017. "New Approaches to Circulating Current Controllers for Modular Multilevel Converters," Energies, MDPI, vol. 10(1), pages 1-20, January.
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    Cited by:

    1. Sheng Wang & Huaibao Wang & Hao Ding & Ligen Xun & Sifan Wu, 2021. "A New SVPWM Strategy for Three-Phase Isolated Converter with Current Ripple Reduction," Energies, MDPI, vol. 14(16), pages 1-15, August.
    2. Matias Diaz & Roberto Cárdenas Dobson & Efrain Ibaceta & Andrés Mora & Matias Urrutia & Mauricio Espinoza & Felix Rojas & Patrick Wheeler, 2020. "An Overview of Applications of the Modular Multilevel Matrix Converter," Energies, MDPI, vol. 13(21), pages 1-37, October.

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