华电技术 ›› 2012, Vol. 34 ›› Issue (12): 6-8.

• 研究与开发 • 上一篇    下一篇

一种适用于高压电动机过流保护的新判据

于剑东   

  1. 南京国电南自美卓控制系统有限公司,江苏南京210061
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-12-25

New criteria suitable for overcurrent protection of highvoltage motor

YU Jiandong   

  1. Nanjing SAC Metso Control System Company Limited,Nanjing 210061, China
  • Received:1900-01-01 Revised:1900-01-01 Published:2012-12-25

摘要: 介绍了目前国内电动机保护所采用过流保护的情况,认为其判据已不能满足用户安全生产需要。通过对电动机电流特性的分析,提出了负序电流分量闭锁过流保护的新逻辑判据,并用实例进行了验证。

关键词: 电动机, 电流特性, 负序电流, 过流保护, 判据

Abstract: The overcurrent protection adopted in domestic motor protection at present was introduced, and it is considered that the criteria of the protection can not meet the requirement of user safety production. According to the analysis of the motor current characteristics, a new overcurrent protection logic criterion with negative sequence current latch was proposed and verified by practical example.

Key words: motor, current characteristics, negative-sequence current, over-current protection, criterion