闭锁式纵联距离保护在110kV～220kV送电线路中的设计

Study on Application of Interlock Sequence Distance Protection for 110 kV～220 kV Design of Transmission Line

在常用继电保护类型和方式的基础上,综合采用相间闭锁式距离纵联保护的设计方案,并经过整定计算和设备选择,进一步完善了继电保护方案。用于110 kV^220 kV变电所,不仅能满足双侧电源的供电模式,还消除了单纯使用距离保护所带来的15%~20%死区,同时可以降低系统的绝缘要求,方式灵活且可靠性高。

Based on commonly type and mode of relay protection,the design proposal of interlock sequence distance protection comprehensively used has been adopted for a power substation of 110 kV^220 kV,and with the set values for the short-circuit calculation and the equipment selection,the scheme of relay protection further perfects.Can satisfy the two side power system not only,more can solve problems of 15%～20% dead-zone caused by using the distance protection alone,meanwhile,the requirements to insulating materials can be reduced,which is flexible and reliable.