Electromechanical Analysis of DFIG under Single Phasing Fault and Air-Gap Eccentricity Fault

Abstract

The wind energy industries adapt doubly-fed induction generators (DFIGs) for their dynamic performance and cost-effectiveness. Despite the relative robustness of this machine, it undergoes several faults that decrease its performance. In this paper, an electromechanical analysis is performed on the DFIG, operating under air-gap eccentricity fault and rotor single phasing fault using Ansys Maxwell software. The eccentricity fault and single phasing fault are formed in Ansys Maxwell at distinct levels and phases. Under these fault conditions, the electrical and mechanical characteristics of the generator, such as torque, rpm, stator currents, and flux, are studied and compared to the stable generator The loss effects of these abnormalities on various generator elements, such as the core and windings, are analyzed and reported. These analyses will help us to examine the dynamic behavior of DFIG under rotor single phasing and air-gap eccentricity faults. This analysis will help the designers to build a robust system.