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Energies 2016, 9(12), 1066; doi:10.3390/en9121066

Fault-Ride through Strategy for Permanent-Magnet Synchronous Generators in Variable-Speed Wind Turbines

1
Institute for Electrical Drive Systems and Power Electronics, Technical University of Munich (TUM), 80333 München, Germany
2
Electrical Engineering Department, Faculty of Engineering, Assiut University, 71516 Assiut, Egypt
*
Author to whom correspondence should be addressed.
Academic Editor: K.T. Chau
Received: 14 August 2016 / Revised: 28 November 2016 / Accepted: 6 December 2016 / Published: 15 December 2016
(This article belongs to the Special Issue Electric Machines and Drives for Renewable Energy Harvesting)
View Full-Text   |   Download PDF [2226 KB, uploaded 15 December 2016]   |  

Abstract

Currently, the electric power production by wind energy conversion systems (WECSs) has increased significantly. Consequently, wind turbine (WT) generators are requested to fulfill the grid code (GC) requirements stated by network operators. In case of grid faults/voltage dips, a mismatch between the generated active power from the wind generator and the active power delivered to the grid is produced. The conventional approach is using a braking chopper (BC) in the DC-link to dissipate this active power. This paper proposes a fault-ride through (FRT) strategy for variable-speed WECSs based on permanent magnet synchronous generators (PMSGs). The proposed strategy exploits the rotor inertia of the WECS (inertia of the WT and PMSG) to store the surplus active power during the grid faults/voltage dips. Thus, no additional hardware components are requested. Furthermore, a direct model predictive control (DMPC) scheme for the PMSG is proposed in order to enhance the dynamic behavior of the WECS. The behavior of the proposed FRT strategy is verified and compared with the conventional BC approach for all the operation conditions by simulation results. Finally, the simulation results confirm the feasibility of the proposed FRT strategy. View Full-Text
Keywords: fault-ride through; permanent-magnet synchronous generator; model predictive control; wind turbine fault-ride through; permanent-magnet synchronous generator; model predictive control; wind turbine
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Abdelrahem, M.; Kennel, R. Fault-Ride through Strategy for Permanent-Magnet Synchronous Generators in Variable-Speed Wind Turbines. Energies 2016, 9, 1066.

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