双馈感应电机无速度传感器直接转矩控制方法  

Speed Sensorless Direct Torque Control Method for Doubly Fed Induction Motor

作　　者：蓝良生[1] 陆正杰[1] LAN Liangsheng;LU Zhengjie(School of Artificial Intelligence and Manufacturing,Hechi University,Yizhou Guangxi 546300,China)

机构地区：[1]河池学院人工智能与制造学院,广西宜州546300

出　　处：《传感技术学报》2023年第8期1275-1280,共6页Chinese Journal of Sensors and Actuators

基　　金：广西高等教育本科教学改革工程一般项目(2018JGA252)。

摘　　要：风电机组双馈感应发电机运行中,由于参数变化的不确定性导致其无速度传感器直接转矩控制输出值出现异常波动,为保证双馈感应电机的频率稳定性,提出一种双馈感应电机无速度传感器直接转矩控制方法。计算转子磁链同步转速和转差速度,得到发电机的转速观测值;分析转子绕组电压空间矢量,建立磁链模型并构建电磁矩阵,在矩阵中计算定子绕组和转子绕组的磁势矢量,通过二者的矢量积得到电机的电磁转矩;转速和转矩共同组成直接转矩控制系统,实现对电机的速度调节和控制。仿真分析结果表明:采用所提方法时,在双馈感应电机启动后转速迅速增加,且在1.2 s后转速始终保持为1400 r/min,可保证转子磁链的运行轨迹接近于圆形,直接转矩控制效果平稳。During the operation of doubly fed induction generator of wind turbine,the output value of speed sensorless direct torque con⁃trol fluctuates abnormally due to the uncertainty of parameter changes.In order to ensure the frequency stability of doubly fed induction motor,a speed sensorless direct torque control method of doubly fed induction motor is proposed.The synchronous speed and slip speed of the rotor flux linkage are calculate,and the observed speed of the generator is obtained.The voltage space vector of rotor winding is analyzed,the flux linkage model is calculated and the electromagnetic matrix is constructed,the magnetic potential vector of stator wind⁃ing and rotor winding is calculated in the matrix,and the electromagnetic torque of the motor is obtained through the vector product of the two.Speed and torque together form a direct torque control system to realize the speed regulation and control of the motor.The simu⁃lation results show that the speed increases rapidly after the start of the doubly fed induction motor shen the proposed method is adopt⁃ed,and the speed remains at 1400 r/min after 1.2 s,which can ensure that the running track of the rotor flux is close to the circle,and the direct torque control effect is stable.

关 键 词：速度传感器 双馈感应电机 直接转矩 磁链模型 电压空间矢量 电磁矩阵 转子绕组 

分 类 号：TM348[电气工程—电机]