220kV BP系列母差保护“六统一”前后的对比分析

Comparative Analysis of 220 kV BP Series Bus Differential Protection Before and After the“Six Unifications”

“六统一”标准出台后,江苏电网新投运变电站都是在“六统一”标准下设计安装的。结合江苏电网继电保护运行实际,重点分析了“六统一”标准执行前后220 kV BP系列母差保护的差动保护、充电过流保护、母联失灵和死区保护等几项重点保护运行操作特点,对保障“六统一”标准执行后220 kV BP系列母差保护运行操作的正确性具有一定的参考价值。

After the introduction of the“six unification”standard,the new substations of Jiangsu Power Grid are designed and installed under the“six unification”standard.Combined with the actual operation of relay protection in Jiangsu Power Grid,this paper focuses on the analysis of several key protection operation characteristics of the 220 kV BP series bus differential protection before and after the implementation of the“six unifications”standard,such as differential protection,charging overcurrent protection,bus connection failure and dead time protection,which has certain reference value for ensuring the correctness of the operation of the 220 kV BP series bus differential protection after the implementation of the“six unifications”standard.