To address the issues of response lag and ineffective yaw adjustments in traditional yaw control systems under rapidly changing wind speed and direction
this study proposes a machine learning-based yaw control strategy for offshore wind turbines to further improve power generation efficiency. Firstly
the wind speed and direction measurement data are pre-processed using the averaging and variational mode decomposition (VMD) methods. The wind data is decomposed into high-frequency
mid-frequency
low-frequency
and residual components at different time scales. Based on the processed wind data
a self-attention-based convolutional neural network-long short-term memory (SA-CNN-LSTM) model is developed for ultra-short-term prediction of each frequency component and residual term
which constructs the wind prediction model. Furthermore
wind speed intervals based on turbine operating states are established and an optimal objective function is formulated. Then
the yaw control strategy integrating prediction models with parameters is optimized through the improved grey wolf optimizer (IGWO) and particle swarm optimization (PSO) algorithms. Results demonstrate that the proposed yaw control strategy enhances yaw efficiency by optimizing yaw errors
adjustment actions and timing
which improves the power generation efficiency of offshore wind turbines.
关键词
Keywords
references
YANG J, FANG L Q, SONG D R, et al.Review of control strategy of large horizontal-axis wind turbines yaw system[J]. Wind energy, 2021, 24(2): 97-115.
SOLOMIN E V, TEREKHIN A A, MARTYANOV A S, et al.Horizontal axis wind turbine yaw differential error reduction approach[J]. Energy conversion and management, 2022, 254: 115255.
TANG Z H, ZHAO G N, OUYANG T H.Two-phase deep learning model for short-term wind direction forecasting[J]. Renewable energy, 2021, 173: 1005-1016.
HARBOLA S, COORS V.One dimensional convolutional neural network architectures for wind prediction[J]. Energy conversion and management, 2019, 195: 70-75.
CHEN W T, LIU H, LIN Y G, et al.LSTM-NN yaw control of wind turbines based on upstream wind information[J]. Energies, 2020, 13(6): 1482.
QU C Z, LIN Z W, CHEN P, et al.An improved data-driven methodology and field-test verification of yaw misalignment calibration on wind turbines[J]. Energy conversion and management, 2022, 266: 115786.
XU L, OU Y X, CAI J J, et al.Offshore wind speed assessment with statistical and attention-based neural network methods based on STL decomposition[J]. Renewable energy, 2023, 216: 119097.
SONG D R, YANG J, FAN X Y, et al.Maximum power extraction for wind turbines through a novel yaw control solution using predicted wind directions[J]. Energy conversion and management, 2018, 157: 587-599.
SONG D R, FAN X Y, YANG J, et al.Power extraction efficiency optimization of horizontal-axis wind turbines through optimizing control parameters of yaw control systems using an intelligent method[J]. Applied energy, 2018, 224: 267-279.
NADIMI-SHAHRAKI M H, TAGHIAN S, MIRJALILI S. An improved grey wolf optimizer for solving engineering problems[J]. Expert systems with applications, 2021, 166: 113917.