一种基于改进自抗扰控制器的风电机组变桨距控制策略

为了改善风电机组的恒功率输出区域的动态性能,提出了一种基于改进自抗扰控制器的变桨控制策略。当风速高于额定风速时,通过调节桨距角改变风机气动转矩,保证风机输出功率的稳定性。设计了一个改进的连续光滑的非线性函数,可有效提高系统的抗扰动能力。基于该非线性函数对传统自抗扰控制器做出了改进。仿真结果证明,改进自抗扰控制器的变桨距控制系统能够对桨距角进行精确调整并将输出功率快速稳定到额定值附近,具有较快的响应速度及较好的抗扰动能力。

A Variable Pitch Control Strategy for Wind Turbines Based on Improved Active Disturbance Rejection Controller

In order to improve the dynamic performance of the constant power output region of the wind turbine, a pitch control strategy based on the improved auto disturbance rejection controller is proposed. When the wind speed is higher than the rated wind speed, the air torque of the wind turbine is changed by adjusting the pitch angle to ensure the stability of the output power of the wind turbine. An improved continuous smooth nonlinear function is designed to effectively improve the anti-disturbance capability of the system. Based on this nonlinear function, the traditional ADRC controller has been improved. The simulation results show that the pitch control system with improved auto disturbance rejection controller can accurately adjust the pitch angle and quickly stabilize the output power to the rated value, with faster response speed and better anti-disturbance capability.