海上风力机叶片变桨将会影响支撑平台的动态响应特性即海上风力机的漂浮稳定性，而海上风力机的漂浮稳定性是影响其有效利用深海区域风能的重要因素。因此，在开源软件FAST与Matlab/Simulink联合仿真平台上，建立干扰自适应控制（DAC），并与FAST原有控制策略对比分析，研究不同控制策略对海上风力机漂浮稳定性的影响。结果表明：较之FAST控制策略，在DAC作用下海上风力机风轮转速及输出功率波动更小，但海上风力机平台动态响应较大；不同控制策略对于海上风力机漂浮稳定性的影响主要集中在纵摇及纵荡；在海上风力机的变桨控制策略设计时应该首先避免纵摇方向的固有频率以提高海上风力机漂浮稳定性。研究结果以期为设计更适合海上风力机的变桨控制器提供理论基础与现实途径。
Abstract
The pitch operation of offshore wind turbine blades affects the dynamic response of the supporting platform, namely the floating stability of the offshore wind turbine.However, the floating stability of the offshore wind turbine is an important factor in its ability to exploit wind energy in the deep sea.Therefore, disturbance accommodating control (DAC) was established in the open source software FAST and the Matlab / Simulink co-simulation platform, and compared with the original control strategy of FAST to study the influence of different controllers on the floating characteristics of offshore wind turbines.The result show that: Compared with the FAST control strategy, DAC has better control effect on offshore wind turbines, which aggravate the dynamic response of offshore wind turbines.The influence of different control strategies on the floating characteristics of offshore wind turbines mainly lies in the direction of surge and pitch.In the design of pitch control strategy of offshore wind turbine, the natural frequency in pitch direction should be avoided firstly to improve the floating stability of offshore wind turbine.The results provide a theoretical basis for designing a pitch controller that is more suitable for offshore wind turbines.
关键词
海上风力机 /
Spar平台 /
漂浮稳定性 /
动态响应 /
干扰自适应控制
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Key words
offshore wind turbine /
Spar platform /
floating stability /
dynamic response /
disturbance accommodating control
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