By analyzing the fault mechanism of stator inter-turn short circuit in doubly-fed induction generator(DFIG)

the mathematical model for the stator inter-turn short circuit fault was established.Numerical simulation was carried out on the platform of MATLAB/Simulink

the three phase currents and inter-turn circulation during the stator inter-turn short circuit fault are acquired.The results show that

it is difficult to distinguish a slight inter-turn short circuit from the stator currents.The eccentricity of Park's vector trajectory is analyzed under different fault conditions.It shows that the eccentricity can be a fault feature because it is sensitive to faults.Therefore

the eccentricity is regarded as a characteristic parameter and can be a basis of fault diagnosis.