电动机动态相量法建模及对闪变传播的影响分析  

Induction motor modeling with dynamic phasors and analysis of its influence on flicker propagation

作　　者：康健[1] 邵振国[1] 张培铭[1] 

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108

出　　处：《电力自动化设备》2010年第10期27-32,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(50747043)~~

摘　　要：提出了一种适用于电压闪变传播研究的感应电动机建模方法。该方法从三相感应电动机的电压方程、电磁转矩方程和基本运动方程出发,利用动态相量法建立了电源电压为波动电压情况下的感应电动机动态相量模型;实现了电动机定子电流的定量计算;并进一步分析了电动机参数对波动性定子电流和转子机械角速度的影响。利用定子电流计算公式,实现了电动机电压的定量计算;通过对比分析电源电压和电动机电压的均方根(RMS)值中的闪变频率分量,研究电动机负荷对闪变传播的影响,并给出了闪变传播系数的频率特性。结果表明,在绝大多数闪变频率下,电动机负荷对闪变具有抑制作用。仿真结果验证了理论分析的正确性。A method of induction motor modeling is proposed for the study of voltage flicker transfer. Based on the voltage equations,electromagnetic torque equations and basic motion equations,the dynamic phasor method is applied to establish the dynamic phasor model of the three-phase induction motor with fluctuant source voltage. The quantitative calculation of stator current is realized and the influences of induction motor parameters on fluctuant stator current and rotor mechanical angular velocity are analyzed. The quantitative calculation of induction motor voltage is realized with the stator current calculation formula. The influ- ence of motor-type load on voltage flicker transfer is studied by comparing the flicker frequency components of RMS values between source voltage and motor voltage,and the frequency characteristics of flicker transfer coefficient are presented. Results show that the induction motor restrains the flicker at most flicker frequencies. The correctness of theoretical analysis is verified by simulation.

关 键 词：感应电动机 动态相量模型 电压波动 闪变传播系数 频率特性 

分 类 号：TM71[电气工程—电力系统及自动化]