Study of the Efficiency of a Doubly FED Induction Generator

The higher the input power of the DC prime mover the higher the efficiency and the lower the input power the lower the efficiency.The lower the power input of a DFIG the bigger the efficiency and the bigger the input power the smaller the efficiency. The efficiency of a doubly fed induction generator is determined by a number of factors but the installation of capacitors banks so that they can produce the reactive power needed for the motor to give it a starting torque and hence reducing on the input power while the efficiency will be still improved hence energy will be saved.