摘要
由于风具有随机性和间歇性等特点,风力机的输出功率变化很大。而风力发电引起电压波动和闪变的根本原因是并网风电机组输出功率的波动。为提高风电机组控制系统的鲁棒性,本文将自抗扰控制技术(ADRC)引入到风电机组转矩控制中,将转矩尖波信号归到未知扰动中,在风速突变的情况下保持输出转矩稳定。采用非线性状态误差反馈控制率(NLSEF)抑制转子电流波动,从而抑制转矩扰动。MATLAB/Simulink仿真证实该方法能在发电机输出侧有效抑制扰动,提高了风电机组动态性能,有利于改善供电质量。
Wind power has the characteristics of random and intermittent,so wind turbine output power varies widely.Wind turbines may therefore cause the output power fluctuations and lead to voltage fluctuations,which may cause flicker problems.Based on the features of wind power and characteristics of wind power generators,a mathematical model had been built in this paper and the auto-disturbance rejection control（ADRC） was introduced to the wind turbine control system.The torque spikes signal was treated as uncertain disturbances in the system.ADRC controller was used to estimate and compensated disturbances signal,nonlinear state error feedback（NLSEF） inhibit the fluctuations of rotor current,and suppress torque disturbance.The simulation results show that the new controller ensures very good robustness.In the generator output side,it can effectively restrain the disturbance signal.The improved static and dynamic performance of wind turbine will help to enhance the quality of power supply.
出处
《电工电能新技术》
CSCD
北大核心
2011年第3期55-58,88,共5页
Advanced Technology of Electrical Engineering and Energy
基金
天津市高等学校科技发展基金资助项目(重点)(2006ZD32)
关键词
双馈风力发电机
电压波动与闪变
自抗扰控制
MATLAB仿真
doubly-fed wind generator
voltage fluctuation and flicker
active disturbance rejection control
MATLAB simulation
