异步电动机反时限保护分析  

Study on Inverse Time Protection of Asynchronous Motor

作　　者：林世治[1] 孙爱平[1] 

机构地区：[1]福建水利电力职业技术学院,福建永安366000

出　　处：《江西电力职业技术学院学报》2013年第4期13-14,35,共3页Journal of Jiangxi Vocational and Technical College of Electricity

摘　　要：分析了异步电动机在电压不对称时,产生的负序分量电流对异步电动机造成的影响;负序电流过热要比正序电流更为严重,提出了等效方法替代定子电流方案;提出了反时限特性中幂函数用泰勒级数求取时限的方法。In this paper, effect of negative sequence current is analyzed which occurs while the power supply is asymmetry in asynchronous motor. Thermal affection of negative sequence current is more serious than that of posi- tive sequence current. Equivalent scheme is proposed to simulate the stator current. Means to get the time is also ad- vanced in inverse time characteristic exponential function via Taylor progression.

关 键 词：异步电动机 负序电流 等效电流 反时限特性 过电流保护 

分 类 号：TM993[电气工程—电力电子与电力传动]