带有扰动观测器的双模分段风电偏航控制

Double Mode Sectional Yaw Control of Wind Turbines With Disturbance Observer

针对风电偏航控制系统中存在扰动和不确定性因素的问题,设计了扰动观测器对其进行补偿,抑制了扰动和不确定因素给系统带来的不利影响。为使系统获得较好的跟踪效果,采用双模分段控制,即跟踪控制器在大偏差情况下采用比例控制,在小偏差情况下采用模糊比例微分控制,使系统具有较好的跟踪响应速度及动态性能指标。仿真结果表明,采用扰动观测器和模糊分段控制相结合的设计方案,在存在扰动的情况下,偏航系统依然具有较好的跟踪特性。

To deal with the disturbances and uncertain factors in yaw control of wind power generator set, a disturbance observer is designed to compensate the yaw and suppress the detrimental effect brought by these disturbances and uncertain factors. To provide a better tracking effect for control system, an approach of double mode sectional control is adopted, i.e., the proportional control mode is applied to tracking controller under large deviation and the fuzzy proportional differential control is applied to tracking controller under small deviation to make control system possessing better tacking response speed and dynamic performance index. Simulation results show that using the design scheme combining disturbance observer with fuzzy sectional control, the yaw system can still possess better tracking characteristics.