基于继电保护压板正确投退重要性的研究

Analysis on the Importance of Correct Switching on and off of Relay Protection Pressing Plate

继电保护中保护压板分为保护硬压板和保护软压板,保护压板投入、退出不正确会引起保护拒动,也有可能造成保护误动作,引起用户失电,造成较大的经济损失,因此继电保护的保护压板的重要性不言而喻。针对一起改造项目实施中主变的差动保护压板未正确投退,从而引起主变差动保护误动作跳闸,导致35 kV母线失电,造成较大经济损失的事故案例进行分析,并制定相应的预防措施。

The protection platen in relay protection is divided into hard protection platen and soft protection platen.If the protection platen is switch on and off incorrectly,it will cause the protection to refuse to move,and it may also cause the protection to misoperate and cause the user to lose power,causing greater economic losses.Therefore,the protection of the relay protection platen is very important.In the implementation of the transformation project,the differential protection pressure plate of the main variable was not correctly switch on and off,which caused the main variable differential protection to trip misoperation,resulting in the loss of power of the 35 kV bus bar and caused large economic losses.The accident is analyzed and preventive measures are proposed accordingly.