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Transition from Islanded to grid-connected mode of microgrids with voltage-based droop control

Tine Vandoorn (UGent) , Bart Meersman (UGent) , Jeroen De Kooning (UGent) and Lieven Vandevelde (UGent)
(2013) IEEE TRANSACTIONS ON POWER SYSTEMS. 28(3). p.2545-2553
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Abstract
Microgrids are able to provide a coordinated integration of the increasing share of distributed generation (DG) units in the network. The primary control of the DG units is generally performed by droop-based control algorithms that avoid communication. The voltage-based droop (VBD) control is developed for islanded low-voltage microgrids with a high share of renewable energy sources. With VBD control, both dispatchable and less-dispatchable units will contribute in the power sharing and balancing. The priority for power changes is automatically set dependent on the terminal voltages. In this way, the renewables change their output power in more extreme voltage conditions compared to the dispatchable units, hence, only when necessary for the reliability of the network. This facilitates the integration of renewable units and improves the reliability of the network. This paper focusses on modifying the VBD control strategy to enable a smooth transition between the islanded and the grid-connected mode of the microgrid. The VBD control can operate in both modes. Therefore, for islanding, no specific measures are required. To reconnect the microgrid to the utility network, the modified VBD control synchronizes the voltage of a specified DG unit with the utility voltage. It is shown that this synchronization procedure significantly limits the switching transient and enables a smooth mode transfer.
Keywords
AC, microgrid, OPERATION, GENERATION, SYSTEMS, INVERTERS, POINT TRACKING ALGORITHMS, synchronization, Distributed generation, droop control

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MLA
Vandoorn, Tine, et al. “Transition from Islanded to Grid-Connected Mode of Microgrids with Voltage-Based Droop Control.” IEEE TRANSACTIONS ON POWER SYSTEMS, vol. 28, no. 3, 2013, pp. 2545–53, doi:10.1109/TPWRS.2012.2226481.
APA
Vandoorn, T., Meersman, B., De Kooning, J., & Vandevelde, L. (2013). Transition from Islanded to grid-connected mode of microgrids with voltage-based droop control. IEEE TRANSACTIONS ON POWER SYSTEMS, 28(3), 2545–2553. https://doi.org/10.1109/TPWRS.2012.2226481
Chicago author-date
Vandoorn, Tine, Bart Meersman, Jeroen De Kooning, and Lieven Vandevelde. 2013. “Transition from Islanded to Grid-Connected Mode of Microgrids with Voltage-Based Droop Control.” IEEE TRANSACTIONS ON POWER SYSTEMS 28 (3): 2545–53. https://doi.org/10.1109/TPWRS.2012.2226481.
Chicago author-date (all authors)
Vandoorn, Tine, Bart Meersman, Jeroen De Kooning, and Lieven Vandevelde. 2013. “Transition from Islanded to Grid-Connected Mode of Microgrids with Voltage-Based Droop Control.” IEEE TRANSACTIONS ON POWER SYSTEMS 28 (3): 2545–2553. doi:10.1109/TPWRS.2012.2226481.
Vancouver
1.
Vandoorn T, Meersman B, De Kooning J, Vandevelde L. Transition from Islanded to grid-connected mode of microgrids with voltage-based droop control. IEEE TRANSACTIONS ON POWER SYSTEMS. 2013;28(3):2545–53.
IEEE
[1]
T. Vandoorn, B. Meersman, J. De Kooning, and L. Vandevelde, “Transition from Islanded to grid-connected mode of microgrids with voltage-based droop control,” IEEE TRANSACTIONS ON POWER SYSTEMS, vol. 28, no. 3, pp. 2545–2553, 2013.
@article{3033647,
  abstract     = {{Microgrids are able to provide a coordinated integration of the increasing share of distributed generation (DG) units in the network. The primary control of the DG units is generally performed by droop-based control algorithms that avoid communication. The voltage-based droop (VBD) control is developed for islanded low-voltage microgrids with a high share of renewable energy sources. With VBD control, both dispatchable and less-dispatchable units will contribute in the power sharing and balancing. The priority for power changes is automatically set dependent on the terminal voltages. In this way, the renewables change their output power in more extreme voltage conditions compared to the dispatchable units, hence, only when necessary for the reliability of the network. This facilitates the integration of renewable units and improves the reliability of the network. This paper focusses on modifying the VBD control strategy to enable a smooth transition between the islanded and the grid-connected mode of the microgrid. The VBD control can operate in both modes. Therefore, for islanding, no specific measures are required. To reconnect the microgrid to the utility network, the modified VBD control synchronizes the voltage of a specified DG unit with the utility voltage. It is shown that this synchronization procedure significantly limits the switching transient and enables a smooth mode transfer.}},
  author       = {{Vandoorn, Tine and Meersman, Bart and De Kooning, Jeroen and Vandevelde, Lieven}},
  issn         = {{0885-8950}},
  journal      = {{IEEE TRANSACTIONS ON POWER SYSTEMS}},
  keywords     = {{AC,microgrid,OPERATION,GENERATION,SYSTEMS,INVERTERS,POINT TRACKING ALGORITHMS,synchronization,Distributed generation,droop control}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{2545--2553}},
  title        = {{Transition from Islanded to grid-connected mode of microgrids with voltage-based droop control}},
  url          = {{http://doi.org/10.1109/TPWRS.2012.2226481}},
  volume       = {{28}},
  year         = {{2013}},
}
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