三相电动机智能保护器的研究

Research on Intelligent Protector of Three-phase Motor

通过对称分量法分析三相电动机不对称故障,并把其用在三相电动机智能保护器设计中。保护器通过检测计算电机运行时的负序和零序分量,进行电动机的过载保护、断相保护、短路保护、堵转保护、三相不平衡保护过电压保护、接地保护、欠电压保护。

Asymmetric fault of three-phase motor is analyzed by symmetrical component method and used in the design of threephase motor intelligent protector.The protection protects the motor against overload,phase failure,short circuit,stall protection,three-phase unbalance protection,overvoltage protection,earth fault protection and under voltage protection by detecting and calculating the negative sequence and zero sequence components during motor running.