以NREL的5 MW的OC4半潜式海上漂浮式风力机为研究对象,首先建立半潜式风力机动力学简化模型,其中外激励的环境载荷模拟使用了一种载荷系数法并进行验证。基于此模型,风浪载荷联合作用下对半潜式风力机性能影响最大的是纵摇形式的动态响应,设计一种双幂次趋近律滑模控制压载水的方法来降低半潜式风力机的运动响应。最后,对所设计的控制器进行仿真。仿真结果表明：相比于传统变幂次趋近律滑模控制和幂次趋近律滑模控制,双幂次趋近律滑模控制方法有更高的控制精度,可有效降低载荷的作用效果,从而维持系统的稳定。
Abstract
Taking the 5 MW OC4 semi-submersible offshore floating wind turbine of NREL as the research object, a simplified dynamic model of the semi-submersible wind turbine is firstly established, in which a load coefficient method is used to simulate the external excitation environmental load and is verified. Based on this model, the dynamic response of pitch form has the greatest impact on the performance of the semi-submersible wind turbine under the combined action of wind and wave loads. A dual power reaching law sliding mode control ballast water method is designed to reduce the vibration of the semi-submersible wind turbine. Finally, the designed controller is simulated. The simulation results show that, compared with the traditional variable power reaching law sliding mode control and the power reaching law sliding mode control, the dual power reaching law sliding mode control method has higher control accuracy and can effectively reduce the effect of the load, thus maintaining the stability of the system.
关键词
海上风电 /
半潜式风力机 /
动力学建模 /
非线性系统 /
压载水 /
双幂次趋近律滑模控制
Key words
offshore wind power /
semi-submersible wind turbines /
dynamic modeling /
nonlinear system /
ballast water /
double power reaching law sliding mode control
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基金
新疆维吾尔自治区自然基金（2021D01C046）; 新疆维吾尔自治区重点实验室建设项目（2021D04011）; 新疆维吾尔自治区重大科技专项（2022A1001-3）
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