Performance Analysis of Grid-Connected Wind Turbine System Under Inter-Turn-Short-Circuit Fault Conditions

- This paper aims to analyze the performance of a variable-speed wind turbine system under internal faulty conditions. Thus, a wind turbine grid-connected system driven three-phase induction generator is modeled. The turbine mathematical model controlled by Maximum Power Point Tracking (MPPT) method is presented. The mathematical model of the Induction Generator (IG) is also set up in the ( abc )-reference frame. Indirect Rotor Flux Oriented Control (IRFOC) technique is developed to control the IG. Afterwards, Inter-Turn Short-Circuit (ITSC) fault affecting the stator windings of the system IG is investigated. Different severity cases of the ITSC fault are considered in order to assess the fault impact on the system continuity of service and the quality of the supplied power to the grid signal. The ITSC fault effects on the turbine, the generator and the stator-side converter are discussed. Simulations, realized under MATLAB/SIMULINK below both healthy and faulty conditions, highlight the system requirement of a quick detection algorithm sensitive to short-circuit fault.

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