【作者】 刘香霞； 沈艳霞； 潘庭龙； 万红淑；

【Author】 LIU Xiang-Xia,SHEN Yan-Xia,PAN Ting-Long,WAN Hong-Shu Institute of Electrical Automation,Jiangnan University,Wuxi 214122,P.R.China

【机构】 江南大学电气自动化研究所；

【摘要】 针对直驱式永磁同步风电系统额定风速以下需要实现风能最大捕获,但电磁转矩震荡大的问题,根据时间的多尺度特性和频率分离原理,将风速分为低频和高频两部分.低频部分采用PI控制,建立高频风速时的直驱式永磁同步风电系统的LPV模型,并设计基于此模型的增益调度控制器以补偿电磁转矩,有效减小震荡.仿真结果表明该控制器可有效减小震荡,提高系统的可靠性.更多还原

【Abstract】 The direct-driven permanent magnet synchronous wind power system has high mechanical oscillation,when the generator is controlled to maximize the efficiency of captured wind energy.To solve these problems,the wind speed is distributed to low frequency and high frequency parts,and it is based on multi-time scale of wind speed and frequency separation principle.The low frequency part of the system still adopts PI control,and for the high frequency part,this paper establishes LPV model and designs gain varying controller based on the model,The controller can compensate mechanical torque and decrease mechanical oscillation efficiently.The simulation results show that the controller reduces the overshoot of mechanical torque, and enhance the system reliability.更多还原