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Reactive Power Control in Doubly-Fed Induction 

سال انتشار : 2008

نوع مقاله : IEEE CONFERENCE PUBLICATION

تعداد صفحات : 6

Abstract—High penetration level of wind power generation in

the interconnected electrical network and the increasing rated

power of the wind energy converter units imposes new technical

challenges to engineers. The first one is to guarantee grid stability

despite the stochastic nature of wind while the second one is to

limit the power losses since electrical machines efficiency do not

augment proportionally to the rated power increase in the MWclass.

Attending to the new requirements of the power companies

on wind turbines concerning the contribution to network stability

through reactive power exchange with the mains supply, this

work proposes a reactive power control scheme for a doublyfed

induction generator drive that minimises the system power

losses. This drive topology enables besides the control of active

power the independent control of reactive power with both

inverters. This degree of freedom is used in order to share the

reactive currents resulting on the reactive power required on the

network and increasing the efficiency. The steady-state power

losses are modeled and the optimal reactive power share working

points are found by an iterative procedure. The control structure

design is presented and discussed as well as implementation

issues. Experimental results are presented in order to prove the

theoretical assumptions.

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