69cf3305_bstracts___IEEE_GreenTech_2013__Category____Sub_Category
[Paper Title, Abstract] Modeling DFIG Using the General Vector Representation in the Presence of Harmonics Show AbstractHide Abstract In this paper, a doubly-fed induction generator (DFIG) wind turbine is modeled using the general vector representation of voltage, current and magnetic flux in the presence of harmonics. The general vector representation provides insights to how harmonics are injected in the rotor side because of the use of the DC/AC inverter, and how rotor current is modulated with the rotor’s mechanical speed before it is inserted into the stator side through the air gap. We have also used repetitive rectangular pulses to account for the change in the area of interface between the stator’s poles and the rotor’s poles caused by the mechanical speed using. For the 6-pole DFIG, the periodicity of rectangular pulse creates multiples of the sixth harmonic of the induced magnetic flux which is modulated with the flux of the synchronous speed. Hence it produces multiples of (n6±1)ωs Our simulation shows that the 6-pole DFIG wind turbine stator current injects 5th, 7th and 11th harmonics in addition to a sub fundamental frequency into the grid. Hence, the general vector representation model maybe used for to design optimal controller that would also minimize harmonics of the stator current. [Schedule] TTM-GTH1 [Category :: Sub-Category] 
Wind Power
Abstracts « IEEE GreenTech 2013
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