电压暂降下直流电机驱动动态特性仿真研究

Simulation analysis of the dynamic character of DC motor drive under voltage sags

电压暂降是目前电能质量问题中最严重也是最受关注的问题,特别是对工业应用场合中广泛使用的可调速驱动设备。首先对电压暂降问题作了简要介绍;针对直流调速系统应用广泛但易受电压暂降影响的特点,在Matlab 2007的Simulink模块中,对工业生产中大量采用的无刷直流电机驱动进行了建模,并对不同电压暂降条件下的动态特性进行了仿真分析和比较。最后提出了解决电压暂降问题的主要途径。

Voltage sag is one of the most serious power quality problems in power distribution system, especially to these ASD （Adjustable Speed Drive） devices which are widely used in current industry applications. Therefore, it attracts the most attention of power quality researchers. This paper gives a brief presentation of the voltage sag problem. Because the DC ASD devices are widely used and are sensitive to voltage sags, it establishes the model of the most widely used DC Brushless Motor Drive in industry, and uses the SIMULINK module in MATLAB 2007. Furthermore, it makes some dynamic characteristic simulation analysis and comparison under different voltage sags. Finally, some advices are given to deal with voltage sag problems.