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| Damping Control of PMSG-Based Wind Turbines for Power System Oscillations |
| Wang Yi, Zhang Xiangyu, Li Heming, Zhu Xiaorong |
| State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Baoding 071003 China |
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Abstract The damping capability of the wind turbines for power system oscillations is benefit to improve the stability of the power system with large wind power integration. In this paper, the reasons which cause the DC side voltage fluctuation of the full scale power converter of the direct driven permanent magnet synchronous generator(PMSG)-based wind turbines during grid disturbance are discussed firstly, and the solutions to control the dc voltage fluctuation are proposed, which ensures the wind turbines with stable operation and to provide power support to the grid quickly. And then, the principle of improving the system damping through the power regulation of the PMSG-based wind turbines is investigated, and the active and the reactive power damping control strategies are also proposed, respectively. Finally, a three-machine system with 30% wind power penetration is used to validate the proposed control strategies. The simulation results show that the PMSG-based wind turbines not only have the fault ride through ability but also have the fast respond ability to damp the power system oscillations using the presented control strategies, so that the damping characteristic of the power system is improved.
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Received: 13 December 2011
Published: 20 March 2014
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2012, Vol. 27 
