摘要
针对传统PID技术难以实现高精度控制,引入自抗扰控制技术,应用气隙磁链定向的矢量控制原理,建立基于变速恒频双馈发电机的转子电流自抗扰控制模型。采用扩张状态观测器对电压方程中的耦合项和气隙磁链等扰动项进行观测并加以补偿,提高了系统的跟踪性能;并用含转子角转速的观测估计值算出转子角转速,实现了无速度传感器控制。通过Matlab/Simulink仿真验证了无速度传感器控制的有效性,并表明自抗扰控制系统在风速变化时有比PID控制更小的超调量和更快的响应速度,对电网电压的波动有较好的抑制能力。
As the control accuracy of traditional PID technology is low,the ADRC（Active Disturbance Rejection Control） technique is introduced to build the rotor current model of doubly-fed induction generator based on the air gap flux-oriented vector control theory. Extended state observer is used to observe and compensate the coupling terms in voltage equations and the disturbing terms of air gap flux,which improves the system tracking performance. The rotor angular velocity is calculated with the observed estimations, including the rotor angular velocity,to realize the speed sensorlesss control. Simulation with Matlab/Simulink verifies its effectiveness and shows that,compared with PID control,ADRC has smaller overshoot and faster response speed when the wind speed changes,which suppresses the grid voltage fluctuation.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第1期15-18,共4页
Electric Power Automation Equipment
关键词
风力发电
双馈发电机
自抗扰控制
无速度传感器控制
wind farm
doubly-fed induction generator
active disturbance rejection control
speed sensorlesscontrol
