Coordinated control of an HVDC link and doubly fed induction generators in a large offshore wind farm

Xiang, D.W.; Ran, L.; Bumby, J.R.; Tavner, P.J.; Yang, S.C.

Abstract

Doubly fed induction generators (DFIGs) are an economic variable-speed solution for large wind turbines while high-voltage dc (HVdc) transmission is being considered for the grid connection of some offshore wind farms. This paper analyzes the need for coordinating the control of the DFIGs and the HVdc link so that the two topologies can work together, giving system designers and operators a choice that may be useful in some applications. It is desired that individual generators be controlled for power tracking in a way similar to that used when they are connected directly to an ac grid, although a grid voltage reference for the DFIG control is no longer available as an independent source in this case. The study shows that machine control should explicitly maintain the flux level, which then allows the HVdc link to regulate the local system frequency and, indirectly, voltage amplitude. Interactions between DFIGs and the HVdc link are investigated and simulations performed to verify the proposed control strategy.

Citation

Xiang, D., Ran, L., Bumby, J., Tavner, P., & Yang, S. (2006). Coordinated control of an HVDC link and doubly fed induction generators in a large offshore wind farm. IEEE Transactions on Power Delivery, 21(1), 463-471. https://doi.org/10.1109/tpwrd.2005.858785

• Journal Article Type: Article
• Publication Date: 2006-01
• Deposit Date: May 27, 2008
• Publicly Available Date: May 27, 2008
• Journal: IEEE Transactions on Power Delivery
• Print ISSN: 0885-8977
• Electronic ISSN: 1937-4208
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 21
• Issue: 1
• Pages: 463-471
• DOI: https://doi.org/10.1109/tpwrd.2005.858785
• Keywords: Doubly fed induction generator, Frequency, High-voltage dc (HVdc) transmission, Real and reactive power, Voltage, Wind energy, Back PWM converters, Turbines.
• Public URL: https://durham-repository.worktribe.com/output/1562869
• Publisher URL: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=33198&arnumber=1564232&count=85&index=57