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Contribution of a smart transformer in the local primary control of a microgrid

Tine Vandoorn (UGent) , Wim Willems (UGent) , Jeroen De Kooning (UGent) , Jan Van de Vyver (UGent) and Lieven Vandevelde (UGent)
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Abstract
In order to enable an easy participation of microgrids in the electricity markets, the smart transformer (ST) concept has been developed. The ST controls the power exchange between a microgrid and the utility network by only controlling its microgrid side voltage, instead of the conventional arrangement where new set points are communicated to all microgrid elements. When the voltage-based droop (VBD) control is implemented in the DG units, loads and storage elements, all microgrid units automatically respond to this change of microgrid voltage by altering their power output or consumption. However, this reference value of power exchange is dependent on (day-ahead) predictions of both consumption and (renewable) power generation. Hence, when these predictions prove to be inaccurate, the ST will still control the power exchange, but with consequently large variations of the microgrid voltage from its nominal value. It is suggested to take the real-time microgrid voltage into account when determining the reference power of the ST. This is presented in this paper by extending the ST's control strategy with a VBD control, such that the ST can contribute in the primary control. Simulations are included to analyze this primary control of the ST combined with VBD control of the other microgrid elements.
Keywords
droop control, primary control, Microgrid, OPERATION, on-load tap changing transformer, distributed generation units

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Chicago
Vandoorn, Tine, Wim Willems, Jeroen De Kooning, Jan Van de Vyver, and Lieven Vandevelde. 2013. “Contribution of a Smart Transformer in the Local Primary Control of a Microgrid.” In 4th European Innovative Smart Grid Technologies Conference, Proceedings, 1–5. IEEE.
APA
Vandoorn, T., Willems, W., De Kooning, J., Van de Vyver, J., & Vandevelde, L. (2013). Contribution of a smart transformer in the local primary control of a microgrid. 4th European Innovative Smart Grid Technologies Conference, Proceedings (pp. 1–5). Presented at the 2013 4TH IEEE/PES INNOVATIVE SMART GRID TECHNOLOGIES EUROPE (ISGT EUROPE), IEEE.
Vancouver
1.
Vandoorn T, Willems W, De Kooning J, Van de Vyver J, Vandevelde L. Contribution of a smart transformer in the local primary control of a microgrid. 4th European Innovative Smart Grid Technologies Conference, Proceedings. IEEE; 2013. p. 1–5.
MLA
Vandoorn, Tine, Wim Willems, Jeroen De Kooning, et al. “Contribution of a Smart Transformer in the Local Primary Control of a Microgrid.” 4th European Innovative Smart Grid Technologies Conference, Proceedings. IEEE, 2013. 1–5. Print.
@inproceedings{4159570,
  abstract     = {In order to enable an easy participation of microgrids in the electricity markets, the smart transformer (ST) concept has been developed. The ST controls the power exchange between a microgrid and the utility network by only controlling its microgrid side voltage, instead of the conventional arrangement where new set points are communicated to all microgrid elements. When the voltage-based droop (VBD) control is implemented in the DG units, loads and storage elements, all microgrid units automatically respond to this change of microgrid voltage by altering their power output or consumption. However, this reference value of power exchange is dependent on (day-ahead) predictions of both consumption and (renewable) power generation. Hence, when these predictions prove to be inaccurate, the ST will still control the power exchange, but with consequently large variations of the microgrid voltage from its nominal value. It is suggested to take the real-time microgrid voltage into account when determining the reference power of the ST. This is presented in this paper by extending the ST's control strategy with a VBD control, such that the ST can contribute in the primary control. Simulations are included to analyze this primary control of the ST combined with VBD control of the other microgrid elements.},
  author       = {Vandoorn, Tine and Willems, Wim and De Kooning, Jeroen and Van de Vyver, Jan and Vandevelde, Lieven},
  booktitle    = {4th European Innovative Smart Grid Technologies Conference, Proceedings},
  isbn         = {9781479929849},
  issn         = {2165-4816},
  keyword      = {droop control,primary control,Microgrid,OPERATION,on-load tap changing transformer,distributed generation units},
  language     = {eng},
  location     = {Copenhagen, Denmark},
  pages        = {1--5},
  publisher    = {IEEE},
  title        = {Contribution of a smart transformer in the local primary control of a microgrid},
  year         = {2013},
}

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