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Fault detection in induction machines is commonly realized through motor current signature analysis. In case of Wound-Rotor Induction Machine rotor faults, the amplitude of the inverse sequence harmonic component -sf of the rotor current space-vector is monitored in order to sense its variation. However, motor current signature analysis is limited by some drawbacks. In fact, under transient operating...
This paper investigates a new approach for the diagnosis of Rotor asymmetry in Wound-Rotor Induction Machines (WRIM). The method is assessed in a Wind Energy Conversion System, where the rotor side of the WRIM is supplied by a static converter for the control of active and reactive power flows from the generator to the electrical grid. The control system affects electric quantities and their signature...
Design of modern wind farms, and more specifically for smart grids, must take into account two crucial aspects: efficient control strategies and reliable monitoring and diagnosis systems. Wind turbine generators based on Wound Rotor Induction Machine (WRIM) is actually the preferred technology considering the above purposes. With the association of a back-to back converter on the rotor side a Stator-Flux-Oriented-Control...
The paper introduces diagnostic technique for the detection of intermittent stator High-Resistance connection in Wound Rotor Induction Machines. In this context, traditional Fourier Analysis (FA) fails to quantify the extend of fault propagation over time. To overcome this limitation a wavelet based analysis of rotor currents is here proposed in order to detect stator faults. This technique allows...
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