独立变桨控制下的风力机齿轮箱动力学仿真分析

DYNAMICS SIMULATION ANALYSIS OF WIND TURBINE GEARBOX UNDER INDEPENDENT PITCH CONTROL

针对大型风电机组齿轮箱动态载荷问题,以多体动力学理论为基础建立风力机齿轮箱动力学模型,研究系统的独立变桨控制技术,提出线性二次高斯控制（LQG）独立变桨控制策略,建立LQG控制器,利用SIMPACK软件与Matlab/Simulink进行联合仿真,计算在仿真风速下的风力机齿轮箱载荷变化情况,计算并比较在不同风速、不同控制方式下风力机齿轮箱齿轮和轴承所受的动态载荷。计算结果表明,相对于统一变桨,独立变桨控制能更好地降低齿轮箱内部载荷波动,从而降低风力机齿轮箱齿轮和轴承的疲劳载荷。

In order to evaluate the dynamic load problem of large wind turbines gearboxes, multi-body dynamics model of wind turbine gearbox was build based on multi-body dynamics theory, and studied the independent pitch control, Linear Quadratic Gaussian （LQG） scheme was proposed to calculate and compare the dynamic load of gears and bearings in wind turbine gearboxes at different wind speeds under different control models based on the co-simulation of SIMPACK and Matlab 7.1/Simulink and through establishing LQG controller. The study showed that comparing with the unified pitch control strategy the independent pitch control strategy can reduce the load fluctuation, which reduced the fatigue load of gears and bearings in wind turbine gearboxes.