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同步电机机端三相短路的仿真

发表时间:2009-04-30  浏览量:2444  下载量:912
全部作者: 刘学智,刘涤尘
作者单位: 武汉大学电气工程学院
摘 要: 根据同步电机的数学模型方程,对同步电机在三相突然短路时的瞬态过程进行了计算仿真;然后根据各电感等参数得出运算电抗和各个实用参数,代入三相短路电流的解析表达式进行计算,求出了最大瞬态短路电流与转子位置角的关系,得出短路发生在电压瞬时值过零瞬间,此时瞬态电流最大;又在Simulink中搭建了相同参数的同步电机突然短路的仿真模型;并比较分析了在不同方法下的仿真结果,从而对这一现象有了更清楚的认识。
关 键 词: 电气工程;三相短路;数学模型;同步电机
Title: Simulation of three-phase short-circuit at the�terminals of synchronous machine
Author: LIU Xuezhi, LIU Dichen
Organization: School of Electrical Engineering, Wuhan University
Abstract: Based on the mathematical model of synchronous machine, three-phase sudden short-circuit at the terminals of a synchronous machine under open circuit condition was simulated. The standard parameters were calculated by the known inductance parameters and substituted into the analytical expression for computing short-circuit current. Besides, the relationship between the maximal armature momentary current and the rotor angle was obtained. It was concluded that the armature momentary current was maximal when short-circuit occurred at the time when the terminal voltage wave was going through zero. Furthermore, a simulation model with the same parameters in Simulink environment was constructed, and these simulation results were compared and analyzed for getting a better understanding of this phenomenon.
Key words: electrical engineering; three-phase short-circuit; mathematical model; synchronous machine
发表期数: 2009年4月第8期
引用格式: 刘学智,刘涤尘. 同步电机机端三相短路的仿真[J]. 中国科技论文在线精品论文,2009,2(8):847-851.
 
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