CAJ | 학술논문

电网电压骤降引起发电机电磁转矩的暂态波动，这会引起传动链上显著的暂态冲击，降低了传动系统特别是齿轮箱的使用寿命。文中通过 FAST 和 MATLAB/Simulink 联合仿真，建立了5 MW双馈风电机组机械和电气暂态模型，分析了电网对称故障对传动链扭转载荷的影响。提出了一种基于线性二次型调节器(LQR)的转矩阻尼控制器，来降低故障恢复期间的载荷。仿真结果表明，提出的方法有效地抑制了传动链的扭振。
전망전압취강인기발전궤전자전구적잠태파동，저회인기전동련상현저적잠태충격，강저료전동계통특별시치륜상적사용수명。문중통과 FAST 화 MATLAB/Simulink 연합방진，건립료5 MW쌍궤풍전궤조궤계화전기잠태모형，분석료전망대칭고장대전동련뉴전재하적영향。제출료일충기우선성이차형조절기(LQR)적전구조니공제기，래강저고장회복기간적재하。방진결과표명，제출적방법유효지억제료전동련적뉴진。
Grid voltage sag causes typical transients in the generator electromagnetic torque.Thus will result in significant stress on the wind turbine drive-train and reduce the service life of the drive system,especially the gearbox.A combination of different simulation packages,namely FAST(fatigue,aerodynamics,structures and turbulence)and MATLAB/Simulink,are used to model the mechanical and electrical aspects of a 5 MW doubly-fed induction generator (DFIG) based wind turbine respectively.To reduce the mechanical loads induced by symmetrical grid faults,a linear-quadratic regulator (LQR) based generator torque controller is presented.Simulation results show that the proposed controller can effectively suppress the vibration of drive-train after fault ride through (FRT).