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Synchronous Power Control of Grid-Connected Power Converters under Asymmetrical Grid Fault

Author

Listed:
  • Weiyi Zhang

    (Electrical Engineering Department, Technical University of Catalonia, Barcelona 08222, Spain; rocabert@ee.upc.edu (J.R.); candela@ee.upc.edu (J.I.C.); prodriguez@uloyola.es (P.R.))

  • Joan Rocabert

    (Electrical Engineering Department, Technical University of Catalonia, Barcelona 08222, Spain; rocabert@ee.upc.edu (J.R.); candela@ee.upc.edu (J.I.C.); prodriguez@uloyola.es (P.R.))

  • J. Ignacio Candela

    (Electrical Engineering Department, Technical University of Catalonia, Barcelona 08222, Spain; rocabert@ee.upc.edu (J.R.); candela@ee.upc.edu (J.I.C.); prodriguez@uloyola.es (P.R.))

  • Pedro Rodriguez

    (Electrical Engineering Department, Technical University of Catalonia, Barcelona 08222, Spain; rocabert@ee.upc.edu (J.R.); candela@ee.upc.edu (J.I.C.); prodriguez@uloyola.es (P.R.)
    Department of Engineering, Loyola University of Andalucia, Seville 41014, Spain)

Abstract

Control of grid-connected power converters is continuously developing to meet the grid codes, according to which the generation units should keep connected to the grid and further provide ancillary services, such as voltage and frequency support, negative sequence current injection, inertia emulation, etc. A virtual admittance controller is proposed in this paper for the objective of voltage support under asymmetrical grid faults. By using independent and selective admittances for positive and negative sequence current injection, the unbalanced voltage can be significantly compensated during asymmetrical faults. The controller is based on the generic control framework of the synchronous power controller (SPC), which is able to control a power converter with emulated and improved synchronous generator characteristics. Simulation and experimental results based on two paralleled 100 kW grid-connected power converters demonstrate the controller to be effective in supporting unbalanced voltage sags.

Suggested Citation

  • Weiyi Zhang & Joan Rocabert & J. Ignacio Candela & Pedro Rodriguez, 2017. "Synchronous Power Control of Grid-Connected Power Converters under Asymmetrical Grid Fault," Energies, MDPI, vol. 10(7), pages 1-21, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:950-:d:104068
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    Citations

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    Cited by:

    1. Woon-Gyu Lee & Thai-Thanh Nguyen & Hyeong-Jun Yoo & Hak-Man Kim, 2018. "Low-Voltage Ride-Through Operation of Grid-Connected Microgrid Using Consensus-Based Distributed Control," Energies, MDPI, vol. 11(11), pages 1-18, October.
    2. Boris Dumnic & Bane Popadic & Dragan Milicevic & Nikola Vukajlovic & Marko Delimar, 2019. "Control Strategy for a Grid Connected Converter in Active Unbalanced Distribution Systems," Energies, MDPI, vol. 12(7), pages 1-18, April.
    3. Galo Guarderas & Airan Frances & Dionisio Ramirez & Rafael Asensi & Javier Uceda, 2019. "Blackbox Large-Signal Modeling of Grid-Connected DC-AC Electronic Power Converters," Energies, MDPI, vol. 12(6), pages 1-22, March.

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