Low Voltage Ride Through (LVRT) Capability of an enhanced DFIG System
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 7Language: englishTyp: PDF
Personal VDE Members are entitled to a 10% discount on this title
Authors:
Velasco, David; Lopez, Jesus (Department of Electrical and Electronic Engineering – Institute of Smart Cities, Public University of Navarre (UPNa), Pamplona, Spain)
Abstract:
Deep sags commonly induce in DFIG-based systems high transient currents and torque spikes, putting the wind turbine under stress. An enhanced DFIG system derived by performing several modifications on the conventional one is proved to present several benefits regarding LVRT. Special effort has been employed in decreasing the mechanical stress on the shaft by reducing torque spikes produced during grid faults. For this purpose, different software and hardware-based measures involving the Grid-Side Converter (GSC) have been applied on the enhanced system, achieving torque reductions up to 81% with regard to the conventional DFIG system.