同步发电机突然三相短路的仿真研究  

Simulation Study of Synchronous Generator on Sudden Three-phase Short Circuit

作　　者：高仕红[1] 

机构地区：[1]湖北民族学院电气工程系,湖北恩施445000

出　　处：《湖北民族学院学报（自然科学版）》2008年第1期36-40,共5页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：湖北省教育厅科学研究计划项目(B20082908)

摘　　要：同步发电机的突然三相短路,是电力系统最严重的故障,对电机本身和相关的电气设备都可能产生严重的影响,研究它有着非常重要的意义.在d-p坐标系统下,构建了同步发电机的数学模型以及动态等效电路.利用Matlab7.1/Simulink6.3的强大功能,构建了同步发电机机端突然三相短路的仿真模型,并对同步发电机的各物理量在短路期间进行了仿真研究.通过理论和仿真对比分析,同步发电机的各物理量在突然短路的暂态过程中产生很大的冲击和振荡,最后稳定在短路前的状态,仿真结果与理论分析相吻合.此方法还可用来研究同步发电机某些动态过程,从而为电机的优化设计提供必要的理论依据.Three - phase short circuit of synchronous generator is a serious fault in the electric power system,which is likely to influence badly on the noumenon of electric machine and correlative electric equipment,so it is important to study it. In the reference frame, mathematic model and dynamic equivalent circuit was built. By making use of powerful function of Matlab7.1/Simulink6.3, simulation model of synchronous generator on sudden three -phase short circuit was built,various physical quantities were studied by simulation during the short circuit. By comparing theoretics with simulation,various physical quantities of synchronous generator produced tremendous impact and surge during the sudden circuit and they stabilized in the proceeding state of short circuit. The emulational results are consistent with theoretic analysis. This method is also for the use of researching certain dynamic course of synchronous generator, which provided necessary theoretic basis for optimum design of electric machine.

关 键 词：同步发电机 突然三相短路 数学模型 动态等效电路 仿真模型 

分 类 号：TM301[电气工程—电机]