Computational analysis on Doubly fed induction generator to determine core loss under normal and low voltage ride through (LVRT) condition

Abstract

In present scenario, the Doubly Fed Induction Generator (DFIG) is contributing more than 50% in wind power generation. The computation of core losses and copper losses are essential to analyse the electric machine performance. In this paper, DFIG is modelled and analysed using ANSOFT MAXWELL which results in distribution of magnetic flux and magnetic flux density for all the parts of the machine. To validate the result under the disturbance, the Low Voltage Ride Through (LVRT) is considered which is the biggest challenges faced by DFIG. The analysis is made using MATLAB SIMULINK to predict the fault current and voltage magnitudes during LVRT. The same fault current and voltage magnitudes are used in DFIG model created using ANSOFT MAXWELL. The core losses of the machine is computed from maximum flux density under normal, during LVRT and after supressing LVRT.