Power-Flow Control and Stability Enhancement of Four Parallel-Operated Offshore Wind Farms Using a Line-Commutated HVDC Link

Chapter
Part of the Green Energy and Technology book series (GREEN)

Abstract

This chapter presents an effective control scheme using a line-commutated high-voltage direct-current (HVDC) link with a designed rectifier-current regulator (RCR) to simultaneously perform both power-fluctuation mitigation and damping improvement of four parallel-operated 80 MW offshore wind farms delivering generated power to a large utility grid. The proposed RCR of the HVDC link is designed by using modal control theory to contribute adequate damping to the studied four offshore wind farms under various wind speeds. A systematic analysis using a frequency-domain approach based on eigenvalue analysis and a time-domain scheme based on nonlinear model simulations is performed to demonstrate the effectiveness of the proposed control scheme. It can be concluded from the simulation results that the proposed HVDC link combined with the designed RCR can not only render adequate damping characteristics to the studied offshore wind farms under various wind speeds but also effectively mitigate power fluctuations of the offshore wind farms under wind-speed disturbance conditions (Wang et al., IEEE Trans Power Delivery 25(2):1190–1202, 2010).

Keywords

Torque Washout 

Notes

Acknowledgements

This work is supported by the National Science Council of Taiwan under Grant NSC 96-2221-E-006-313-MY3, Grant NSC 97-2918-I-006-010, Grant NSC 99-3113-P-006-007, and Grant NSC 100-3113-E-006-014.

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Copyright information

© Springer-Verlag London Limited 2012

Authors and Affiliations

  1. 1.Department of Electrical EngineeringNational Cheng Kung UniversityTainan CityTaiwan
  2. 2.Energy Systems Research CenterThe University of Texas at ArlingtonArlingtonUSA
  3. 3.Institute of Energy TechnologyAalborg UniversityAalborgDenmark

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