నైరూప్య

Doubly Fed Induction Generator in Wind Mill

Prof. Suraj R.Karpe , Prof.B.N.Bedre , Prof. V.P.Dhote

This paper deals with the analysis, modelling, and control of the doubly-fed induction generator in wind mill. Here different rotor current control methods are determined with the objective of eliminating the influence of the back electromotive force (EMF). Method that utilizes both feed forward of the back EMF and so-called “active resistance” manages best to suppress the influence of the back EMF on the rotor current, particularly when voltage sags occur. This method also gives the best stability properties & best robustness to parameter deviations. The response of the DFIG system is simulated and verified experimentally. Voltage sag to 80% is handled very well. The energy production of the DFIG wind turbine is investigated and compared to that of other wind turbine systems. The result found is that the energy capture of the DFIG wind turbine is almost the same as for an active stall-controlled fixedspeed (using two fixed speeds) wind turbine.