电能质量扰动对三相异步电动机特性的仿真研究

Simulation of Power Quality Disturbance Performance of Three-Phase Asynchronous Motor

在ABC坐标系下建立三相异步电动机的数学模型,并利用MATLAB/Simulink软件建立了相应的异步电动机的模型,分别在电压偏差、三相电压不平衡、频率偏差以及谐波情况下对三相异步电动机的特性进行仿真研究,并对异步电动机定子电流、电磁转矩和转速的变化进行详细分析。结果表明,在不同的电能质量扰动下,电机到达稳定状态的时间、定子电流和转速会发生变化,电机的输出转矩有时也会出现不同程度的脉动转矩,从而给电机带来不利的影响。

The mathematical model of three-phase asynchronous motor was established under ABC coordinate system,and the corresponding asynchronous motor model was established by MATLAB/Simulink software. The characteristics of the three-phase asynchronous motor were simulated under the condition of voltage deviation,threephase voltage imbalance,frequency deviation and harmonic,and the stator current,electromagnetic torque and rotational speed of asynchronous motor were analyzed in detail. The results show that the stator current and speed will change when the motor reaches the steady state under different power quality disturbances,and the output torque of the motor will sometimes have different degrees of ripple torque. Attention should be paid to the bad effects of the asynchronous motor with power quality disturbances.