钢铁企业10 kV异步电动机电流保护配置应用研究  

Research on current protection configuration of 10 kV asynchronous motor in iron and steel plant

作　　者：张强[1] 年明[1] ZHANG Qiang;NIAN Ming(Electrical&Control Division,MCC Capital Engineering&Research Co.,Ltd.,Beijing 100076,China)

机构地区：[1]中冶京诚工程技术有限公司电控所,北京100176

出　　处：《电气应用》2022年第10期45-50,共6页Electrotechnical Application

摘　　要：10 kV异步电动机是钢铁企业极为重要的设备,应用于企业的各个生产流程中。基于钢铁企业的配电系统自身的特点,常规的电动机保护配置方案往往不能满足实际运行的需要。介绍了电动机回路产生大电流的两种情况:电动机向电网短路点反馈短路电流和电动机在电压暂降时的自起动电流。通过一起实例,得出对电动机及其相邻回路电流保护的配置及定值计算方案,提高了相关回路继电保护的准确性与可靠性。The 10 kV asynchronous motors are very important equipment in iron and steel plant,which are applied to all production processes of the enterprise.Based on the characteristics of distribution system in iron and steel plant,the conventional protection configuration of motor scheme may not meet the actual needs.This paper introduces two cases of large current in motor circuit:feed short-circuit current back to the grid and self-starting current by voltage sag.Through an example,this article obtains the configuration and setting calculation of current protection for motor and its adjacent circuits,improves the accuracy and reliability of relay protection.

关 键 词：异步电动机 短路电流 自起动电流 电流保护 整定计算 

分 类 号：TF089[冶金工程—冶金物理化学] TM343[电气工程—电机]