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Lookup NU author(s): Andrew Causebrook, Dr Dave Atkinson, Professor Alan Jack
Fault ride-through (FRT) is required for large wind farms in most power systems. Fixed speed wind turbines (FSWTs) are a diminishing but significant sector in the fast-growing wind turbine (WT) market. State-of-art techniques applied to meet grid requirements for FSWT wind farms are blade pitching and dynamic reactive power compensation (RPC). Blade pitching is constrained by the onerous mechanical loads imposed on a wind turbine during rapid power restoration. Dynamic RPC is constrained by its high capital cost. These present technologies can therefore be limiting, especially when connecting to smaller power systems. A novel alternative technology is proposed that inserts series resistance into the generation circuit. The series dynamic braking resistor (SDBR) dissipates active power and boosts generator voltage, potentially displacing the need for pitch control and dynamic RPC. This paper uses a representative wind farm model to study the beneficial effect of SDBR compared to dynamic RPC. This is achieved by quasi-steady-state characterization and transient FRT stability simulations. The analysis shows that SDBR can substantially improve the FRT performance of a FSWT wind farm. It also shows that a small resistance, inserted for less than one second, can displace a substantial capacity of dynamic RPC. © 2007 IEEE.
Author(s): Causebrook A, Atkinson DJ, Jack AG
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Power Systems
Year: 2007
Volume: 22
Issue: 3
Pages: 966-975
Print publication date: 01/08/2007
ISSN (print): 0885-8950
ISSN (electronic): 1558-0679
Publisher: I E E E
URL: http://dx.doi.org/10.1109/TPWRS.2007.901658
DOI: 10.1109/TPWRS.2007.901658
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