摘要
直驱电励磁电机由于结构简单、成本低的优势,在风力发电系统中得到广泛应用。首先介绍了电励磁电机的数学模型,并在该模型的基础上推导了直接转矩控制算法。针对直驱风机采用背靠背的变换器拓扑实现电能并网的特点,重点研究负载突变时变换器系统直流环节(母线电压)的动态响应能力。为了提高母线电压的动态响应速度,研究了一种基于直接转矩控制的转矩脉冲时间积平衡控制算法,该算法通过分析负载突变过程中母线电压稳定的平衡条件,计算得到最优的电压矢量序列,仅通过一次调节便可让母线电压快速从动态过程恢复至稳态过程。最后,通过仿真和实验验证了该算法的有效性。
Direct-drive electrically excited synchronous motor(EESM)is obtained widespread utilization in wind power generation system due to its advantages of simple construction and low cost.Firstly,a mathematical model of EESM was derived and the direct torque control(DTC)algorithm for EESM was introduced based on the mathematical model.Aiming at the characteristics of adopting back-to-back power converter to combine to the grid,dynamic response capability of the direct current componen(t bus voltage)was investigated during a sudden change of the load.To improve the dynamic response of bus voltage,a DTC-based control algorithm of product balance of torque and impulse time was studied.By analyzing the balance condition to stabilize the bus voltage in the process of sudden change of the load,optimal voltage vector series were calculated to stabilize the bus voltage by experiencing only one time control adjustment.Finally,the effectiveness of the proposed control algorithm was verified by simulation and experiments.
作者
丁强
朱洁
江莹旭
DING Qiang;ZHU Jie;JIANG Yingxu(College of Electrical Engineering,Nanjing Vocational University of Industry Technology,Nanjing 210023,Jiangsu,China;Jiangsu Wind Power Engineering Technology Center,Nanjing 210023,Jiangsu,China;Department of Mechanical&Electrical Engineering,Nanjing Communications Technician College,Nanjing 210049,Jiangsu,China;Suzhou Xinzhi Electromechanical Industry Co.,Ltd.,Suzhou 215156,Jiangsu,China)
出处
《电气传动》
2022年第24期49-57,共9页
Electric Drive
基金
南京工业职业技术大学引进人才启动基金(YK19-02-07)
南京工业职业技术大学国自然培育基金(YK19-02-09)
江苏风力发电工程技术中心开放基金(ZK19-03-06)。
关键词
电励磁电机
直接转矩控制
转矩脉冲时间积平衡
风力发电
electrically excited synchronous motor(EESM)
direct torque control(DTC)
product balance of torque and impulse time
wind power generation
