Torque-Pitch Adaptive Decoupling Control Strategy Near Full-Load Stage for Large-scale Floating Wind Turbines
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Abstract
Near the rated wind speed, due to the random variations of wind speed, wind direction, and sea conditions, large-scale floating wind turbines encounter coupled interference between torque control and pitch control. It may result in substantial drops or fluctuations in electrical power. We propose a multi-stage adaptive decoupling control strategy to address the issue of electrical power drops near the full-load operation. It dynamically adjusts the closed-loop input error of PI controllers by correlating the state of the wind turbine with its torque/pitch outputs. The simulation results demonstrate that this strategy can enhance operational stability, significantly increase electrical power generation, and reduce fatigue/extreme loads of key components in large-scale floating wind turbines.
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