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Automatic power sharing modification of P/V droop controllers in low-voltage resistive microgrids

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Abstract
Microgrids are receiving an increasing interest to integrate the growing share of distributed generation (DG) units in the electrical network. For the islanded operation of the microgrid, several control strategies for the primary control have been developed to ensure a stable microgrid operation. In lowvoltage microgrids, active power/voltage (P/V ) droop controllers are gaining attention as they take into account the resistive nature of the network lines and the lack of directly-coupled rotating inertia. However, a problem often cited with these droop controllers is that the grid voltage is not a global parameter. This can influence the power sharing between different units. In this paper, it is investigated whether this is actually a disadvantage of the control strategy. It is shown that with P/V droop control, the DG units that are located electrically far from the load centres automatically deliver a lower share of the power. This automatic power sharing modification can lead to decreased line losses, thus, an overall better efficiency compared to the methods that focus on perfect power sharing. In this paper, the P/V and P/f droop control strategies are compared with respect to this power sharing modification and the line losses.
Keywords
CONTROL STRATEGY, SUPPLY-SYSTEMS, PARALLEL INVERTERS, DISTRIBUTED-GENERATION INVERTERS, IMPEDANCE, CONVERTERS, OPERATION, AC, SCHEME, Distributed generation (DG), droop controllers, microgrid, power system losses

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Citation

Please use this url to cite or link to this publication:

Chicago
Vandoorn, Tine, Bart Meersman, Jeroen De Kooning, Josep Guerrero, and Lieven Vandevelde. 2012. “Automatic Power Sharing Modification of P/V Droop Controllers in Low-voltage Resistive Microgrids.” Ieee Transactions on Power Delivery 27 (4): 2318–2325.
APA
Vandoorn, T., Meersman, B., De Kooning, J., Guerrero, J., & Vandevelde, L. (2012). Automatic power sharing modification of P/V droop controllers in low-voltage resistive microgrids. IEEE TRANSACTIONS ON POWER DELIVERY, 27(4), 2318–2325.
Vancouver
1.
Vandoorn T, Meersman B, De Kooning J, Guerrero J, Vandevelde L. Automatic power sharing modification of P/V droop controllers in low-voltage resistive microgrids. IEEE TRANSACTIONS ON POWER DELIVERY. 2012;27(4):2318–25.
MLA
Vandoorn, Tine, Bart Meersman, Jeroen De Kooning, et al. “Automatic Power Sharing Modification of P/V Droop Controllers in Low-voltage Resistive Microgrids.” IEEE TRANSACTIONS ON POWER DELIVERY 27.4 (2012): 2318–2325. Print.
@article{2970120,
  abstract     = {Microgrids are receiving an increasing interest to integrate the growing share of distributed generation (DG) units in the electrical network. For the islanded operation of the microgrid, several control strategies for the primary control have been developed to ensure a stable microgrid operation. In lowvoltage microgrids, active power/voltage (P/V ) droop controllers are gaining attention as they take into account the resistive nature of the network lines and the lack of directly-coupled rotating inertia. However, a problem often cited with these droop controllers is that the grid voltage is not a global parameter. This can influence the power sharing between different units. In this paper, it is investigated whether this is actually a disadvantage of the control strategy. It is shown that with P/V droop control, the DG units that are located electrically far from the load centres automatically deliver a lower share of the power. This automatic power sharing modification can lead to decreased line losses, thus, an overall better efficiency compared to the methods that focus on perfect power sharing. In this paper, the P/V and P/f droop control strategies are compared with respect to this power sharing modification and the line losses.},
  author       = {Vandoorn, Tine and Meersman, Bart and De Kooning, Jeroen and Guerrero, Josep and Vandevelde, Lieven},
  issn         = {0885-8977},
  journal      = {IEEE TRANSACTIONS ON POWER DELIVERY},
  language     = {eng},
  number       = {4},
  pages        = {2318--2325},
  title        = {Automatic power sharing modification of P/V droop controllers in low-voltage resistive microgrids},
  url          = {http://dx.doi.org/10.1109/TPWRD.2012.2212919},
  volume       = {27},
  year         = {2012},
}

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