基于改进差分算法的变桨ADRC参数优化

自抗扰控制器是一类不依赖被控对象数学模型且具有较强鲁棒性及抗干扰能力的非线性控制器,已成功应用于风力发电机变桨距控制这一多变量、强耦合的非线性系统中,但自抗扰控制器也存在参数众多整定难度大这一明显缺点。现提出了通过智能算法来实现参数的自动整定。分析了改进差分进化算法的原理及步骤,并将改进差分进化算法应用到ADRC的整定过程中,实现参数的自动整定。仿真结果验证了通过改进差分进化算法自动整定ADRC参数的可行性,与传统PID控制器相比,改进差分进化算法整定后的ADRC能较好的满足风力发电机变桨控制要求,有效维持了风力发电机组输出功率的稳定性。

Optimization of Variable Pitch ADRC Parameter Based on Improved Differential Evolution Algorithm

The active disturbance rejection controller is a kind of nonlinear controller that does not rely on the mathematical model of the controlled object and has strong robustness and anti-interference ability.It has been applied to the multivariable nonlinear system with strong coupling for the variable pitch control of wind turbines,but active disturbance rejection controller also has the distinct disadvantage of great difficulty in setting many parameters.To this end,intelligent algorithm was proposed to realize the automatic setting of parameters.The principle and steps of the improved differential evolution algorithm were analyzed.And the improved differential evolution algorithm was applied to the ADRC setting process to realize the automatic setting of parameters.The simulation results verifies the feasibility of automatically setting the ADRC parameters by improved differential evolution algorithm.Compared with the traditional PID controller,the ADRC after setting can satisfy the requirements of variable pitch control of wind turbines and maintain the stability of the wind turbine output power.