A NOVEL LOW VOLTAGE RIDE THROUGH CAPABILITY STRATEGY FOR DFIG BASED WIND TURBINES

Authors : Kenan DÖŞOĞLU

Pages : 34-44

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Publication Date : 2020-06-16

Article Type : Research Paper

Abstract :One of the chief methods used to overcome voltage dip problems in doubly fed induction generator insert ignore into journalissuearticles values(DFIG);-based wind turbines is low voltage ride through insert ignore into journalissuearticles values(LVRT); capability. In order to solve such voltage dip problems during symmetrical and asymmetrical grid faults, this study presents a novel enhanced dynamic modeling approach for LVRT in DFIG. Positive and negative sequence models, along with natural and forcing flux models were used to enhance the proposed LVRT capability strategy for a DFIG. In addition, electro-motor-force insert ignore into journalissuearticles values(EMF); was applied for the enhancement of the stator and rotor circuit model. The novel stator-rotor dynamic modeling was also used in boosting the transient stability operation against three phase and two phase faults. When the proposed dynamic modeling was applied, the system was stabilized within a short amount of time and the oscillations ceased.
Keywords : DFIG, positive sequence model, negative sequence model, natural forcing flux models, stator rotor EMF