Inter-turn fault diagnosis of PM synchronous generator for variable speed wind applications using floating-space-vector

In this paper, an online fault diagnosis technique suitable for wind-based variable speed PM generators is proposed. This floating-space-vector technique is developed based upon space-vector concepts, and its mathematical formulation is elaborated in this paper. The technique is verified numerically as well as experimentally using a 7.2kW PM machine as a wind generator. The numerical model is based on a multi-physics model of a PM generator. The simulation and experiments are performed under the uncertainties of generator speed, number of shorted turns and fault resistance value. The calculated results show the robustness, accuracy, and proper speed response of the technique.