大同步电动机断电失步建模、仿真与保护设计  

Modeling, Simulation and Protection Design of Power-Break Asynchrone of High-Power Synchronous Motor

作　　者：段大鹏[1] 孙玉坤[1] 潘如政[2] 

机构地区：[1]江苏大学电气信息工程学院,镇江212013 [2]天津大学电气与自动化工程学院,天津300072

出　　处：《高电压技术》2004年第9期6-9,共4页High Voltage Engineering

基　　金：江苏省重点实验室基金资助项目(K2 0 86)

摘　　要：详析了大功率同步电动机断电失步过渡过程中的转速、电压、电流及转矩 ,运用双反应理论建立了dq0坐标系下非同期冲击时刻电动机的Park电压状态方程 ,并与转子机械运动方程联立获得了失步后电源恢复时的数学模型即七阶变系数非线性微分方程组。运用MATLAB仿真了这种严重故障状态 ,利用四阶变步长龙格 库塔法得到了非同期冲击电流、转矩与功角的数值解及波形图。仿真表明非同期冲击电流与转矩可 >15倍的额定值。The rotate speed, voltage, current and torque of high-power synchronous motors during the process of power-break asynchrone, witch was a serious fault state, was analyzed in detail. The synchronous motors PARK voltage state equations and mechanical movement equations were established in this paper, then its mathematic model was also established. In the same time, based on MATLAB and four-variational-step Runge-Kutta, this kind of serious fault process was simulated. The numeric resolution of the seven-steps differential equations and waveform of power angle and asynchronic impulse current, torque was given, which reached up to fifteen times of rating value. At last, it proposed designed idea of protection of the high-power synchronous motors power-break asynchrone, In the same time the protection system structure and the realization method was proposed.

关 键 词：大功率同步电动机 断电失步 非同期冲击 仿真 保护设计 

分 类 号：TM341[电气工程—电机]