Abstract
Stator inter-turn short circuit fault is one of the common faults in Double Fed Induction Generator (DFIG), the mathematical model of the DFIG is established based on the multi — loop theory, and the model of DFIG is built on the MATLAB / Simulink platform under normal condition and different degrees of inter — turn short circuit. The mathematical model of the grid side converter is analyzed to determine the corresponding control strategy, and the concrete given process of the PI regulator parameters is given. Through the simulation analysis of the DFIG under different conditions, the simulation results are consistent with the actual situation, which proves the feasibility of the control strategy. When the stator occurs turns short-circuit, the stator three-phase current is not symmetrical and its corresponding amplitude is increased, there is more obvious 90Hz specific frequency harmonics in rotor-side current FFT.
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