基于铅酸动力电池组供电的电压源型逆变器-牵引感应电机传动系统的稳定性研究

建立了铅酸动力蓄电池组供电的电压源逆变器—牵引感应电机驱动系统的周期系数线性模型，基于Lyapunov稳定性理论，分析了各恒速点的周期开关模式电气稳定性因素。仿真研究表明，铅酸动力蓄电池组的动态内阻变化对感应电机驱动系统的速度稳定区域变化影响显著，动态内阻越小越能够扩大系统速度稳定区域。感应电机的定子电阻增大有利于系统稳定性，转子电阻减小能够扩大系统速度稳定区域，励磁电感变化对系统稳定性影响很小，转差率越大系统稳定性越差。因此，合理选择设计感应电机驱动系统电气参数，能够扩大系统速度稳定区域，乃至整个速度范围保持稳定。这有助于在诸如电动车辆的工程应用中，避免电气传动系统振荡现象的发生。

STABILITY STUDY OF THE VOLTAGE SOURCE INVERTER & TRACTION INDUCTION MACHINE DRIVE SYSTEM FEEDING ON A LEAD-ACID TRACTION BATTERY PACKAGE

A cyclic coefficient linear model of the voltage source inverter & traction induction machine drive system feeding on the lead acid traction battery package is built. Under the constant speeds, the factors in the stability of cyclic switch mode of the induction machine drive system are analyzed based on Lyapunov's stability theory. By simulation, the smaller dynamic resistance of the lead-acid traction battery package, the bigger filter capacitance of the DC-Link circuit, the bigger stator resistance and the smaller rotor resistance of the induction machine is being found helpful to expand the speed stable areas of the drive system. While, the mutual inductance of the induction machine has a little influence on the system stability. The smaller slip of the induction machine can enhance system stability. If these electrical parameters are selected properly, a whole stable speed range can be ensured. It benefits in avoiding the propulsion system oscillation in the electrical engineering applications such as electric vehicles.