基于混合灵敏度H_∞的海上风力发电机组变桨控制及振动抑制

Pitch control and vibration suppression of offshore wind turbine based on mixed sensitivity H_∞ control method

针对海上风力发电机组输出功率波动大和塔架振动明显的问题,设计了混合灵敏度H∞变桨控制器,并引入塔架前后加速度反馈控制,基于SUT-3000双馈风力发电机组模型,利用GH_Bladed软件进行仿真验证。仿真结果表明,在该控制策略作用下,海上风力发电机组输出功率比传统PI控制方法波动更小,保证了海上风力发电机组在高风速运行时输出功率的稳定性,同时降低了塔架前后振动响应。

For the problem of large offshore wind turbine output power fluctuation and obvious tower vibration,a mixed sensitivity H∞ pitch controller was designed,and tower longitudinal acceleration feedback control was introduced. Based on SUT-3000 double-fed wind turbine model, a simulation was done by GH_bladed software. The simulation results showed that the output power fluctuation of mixed sensitivity H∞ control strategy was smaller than that of conventional PI control method,which ensured a steady power output of offshore wind turbine when it was running at high wind speed ,while the vibration response of tower was reduced.