电力系统保护与控制Issue(23)：31-37,7.
电压跌落时感应电动机反馈电流计算及转速影响研究
Induction motor feedback current calculation and speed factor analysis
姜杰 1许宏 1陈贵文 2张太勤3
作者信息
- 1. 输配电装备及系统安全与新技术国家重点实验室 重庆大学，重庆 400040
- 2. 黑龙江省水利厅水电局，黑龙江 哈尔滨 150040
- 3. 重庆新世纪电气有限公司，重庆 400030
- 折叠
摘要
Abstract
Large capacity induction machines have a great influence on short-circuit current level of industrial distribution network. Accurate calculation of the feedback current plays an important role in protection configuration and short-circuit current calculation. The motor speed changing during voltage drop is an important factor affecting the accuracy of feedback current calculation, regardless of the speed changing may cause error in feedback current calculation and affect the operation of protection. Using the positive and negative sequence steady-state equivalent circuit of induction motor and constant complex coefficient linear differential equations solving process, forced component and free component of stator/rotor flux linkage are solved. Then the induction motor feedback current formula in consideration of speed changing factor is deduced. Furthermore, the influence of speed on each component of the flux and feedback current is analyzed. The correctness of the proposed analysis is verified by the fifth electromagnetic transient model of induction motor in PSCAD/EMTDC simulation software.关键词
鼠笼式感应电动机/状态方程/反馈电流/转速/配电网Key words
squirrel-cage rotor induction motor/equation of state/feedback current/speed/distribution network分类
信息技术与安全科学引用本文复制引用
姜杰,许宏,陈贵文,张太勤..电压跌落时感应电动机反馈电流计算及转速影响研究[J].电力系统保护与控制,2014,(23):31-37,7.
