PROJECT TITLE:

Reduced Cost of Reactive Power in Doubly Fed Induction Generator Wind Turbine System with Optimized Grid Filter - 2015

ABSTRACT:

The fashionable grid demand has caused that the wind power system behaves a lot of like standard rotating generators, and it is able to support certain quantity of the reactive power. For a typical doubly fed induction generator (DFIG) wind turbine system, the reactive power will be supported either through the rotor-aspect converter or the grid-aspect converter. This paper initial compares the present ripples and supportive reactive power ranges between the standard L and optimized LCL filter, if the reactive power is injected from the grid-aspect converter. Then, the loss distribution is evaluated each for the generator and the wind power converter in terms of the reactive power done by the rotor-aspect converter or the grid-facet converter with numerous grid filters. Afterward, the annual energy loss is also estimated primarily based on yearly wind profile. Finally, experimental results of the loss distribution are performed in an exceedingly down-scaled DFIG system. It is concluded that overexcited reactive power injected from the grid-facet converter has lower energy loss per year compared to the overexcited reactive power coated by the rotor-aspect converter. Furthermore, it's conjointly found that the annual energy loss could even become lower with the optimized filter and thereby a lot of energy production for the wind turbine.