“汽电双驱”系统电机瞬态性能仿真研究

Simulation Study on Motor Transient Performance Steam-Electric Double Drive System

以上海电机厂有限公司"汽电双驱"项目中三相异步电动机/发电机为依据,基于以Ansoft软件,利用场路耦合法对系统中异步电机的瞬态性能进行分析。该电机为6 800 k W,750 r/min。针对其3种不同的工况,即空载起动、风机负载起动、大负载起动,分别进行分析计算,模拟系统中电机由电动机状态切换成发电机状态的过程,获得该三相异步电机在不同状态下的瞬时起动电流、电磁转矩、气隙磁密等电气参数,进而分析该异步电机的瞬态性能和相应的电磁场分布。

For the three-phase asynchronous motor-generator of a“steam-electric double-drive”system of shanghai Motor Factory Co.,Ltd.,which was 6 800 kW,750 r/min,the transient performance was analyzed based on Ansoft software using field-circuit coupling method.Analyses and calculations were carried out for three different conditions:no-load start,fan load start,and big load start.The process of the motor being switched from the state of motor to the state of generator was simulated.Instantaneous starting current,electromagnetic torque,the air gap flux density and other electrical parameters of the three-phase asynchronous motor-generator in different states were obtained.The transient performance of the asynchronous motor and the corresponding electromagnetic field distribution were analyzed.