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Energies 2017, 10(2), 212; doi:10.3390/en10020212

Effect of Doubly Fed Induction GeneratorTidal Current Turbines on Stability of a Distribution Grid under Unbalanced Voltage Conditions

1
Ocean College, Zhejiang University, Hangzhou 310058, China
2
Engineering Department, Lancaster University, Lancaster LA1 4YR, UK
3
State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 10 September 2016 / Revised: 30 January 2017 / Accepted: 1 February 2017 / Published: 13 February 2017
View Full-Text   |   Download PDF [3396 KB, uploaded 13 February 2017]   |  

Abstract

This paper analyses the effects of doubly fed induction generator (DFIG) tidal current turbines on a distribution grid under unbalanced voltage conditions of the grid. A dynamic model of an electrical power system under the unbalanced network is described in the paper, aiming to compare the system performance when connected with and without DFIG at the same location in a distribution grid. Extensive simulations of investigating the effect of DFIG tidal current turbine on stability of the distribution grid are performed, taking into account factors such as the power rating, the connection distance of the turbine and the grid voltage dip. The dynamic responses of the distribution system are examined, especially its ability to ride through fault events under unbalanced grid voltage conditions. The research has shown that DFIG tidal current turbines can provide a good damping performance and that modern DFIG tidal current power plants, equipped with power electronics and low-voltage ride-through capability, can stay connected to weak electrical grids even under the unbalanced voltage conditions, whilst not reducing system stability. View Full-Text
Keywords: doubly fed induction generator (DFIG); tidal current turbine; distributed generation (DG); network unbalance; system stability doubly fed induction generator (DFIG); tidal current turbine; distributed generation (DG); network unbalance; system stability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, D.; Ma, X.; Si, Y.; Huang, C.; Huang, B.; Li, W. Effect of Doubly Fed Induction GeneratorTidal Current Turbines on Stability of a Distribution Grid under Unbalanced Voltage Conditions. Energies 2017, 10, 212.

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