Using Improved Power Electronics Modeling and Turbine Control to Improve Wind Turbine Reliability


Improving offshore wind turbine reliability could be a key business goal to boost the provision of this renewable energy generation source. The semiconductor devices in the wind turbine power converter are traditionally thought-about as the most sensitive and necessary elements to realize this and managing their thermomechanical stressing is vital, since this is one of their principal long-term aging mechanisms. Standard deterministic reliability prediction ways utilized in industrial applications aren't appropriate for wind turbine applications, thanks to the stochastic nature of the wind speed. This paper develops an electrothermal model of the facility devices, which is integrated with a wind turbine system model for the investigation of power converter thermal cycling underneath varied operating conditions. The model has been developed to eliminate the issues of pulse width modulation switching, substantially reducing simulation time. The model is used to enhance the present controller tuning method to cut back thermal stresses suffered by the converter during a grid fault. The model is finally used to style a control methodology to alleviate a key drawback of the doubly fed induction generator-severe thermal cycling caused throughout operation close to synchronous speed.

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