With the continuous development of substation secondary system

monitoring the status of secondary equipment

especially relay protection devices becomes much more important. The condition monitoring system in the station and remote terminal based on the collection of various signals of protection devices has been widely promoted. However

due to the expansion of the scale and the quantities

the condition monitoring of protection devices presents a trend of complexity and disorder. And it is hard for the operation and maintenance personnel to efficiently troubleshoot and deal with the abnormal problems. Firstly

the advantages and disadvantages of the existing monitoring system for in-station protection device analyzed from multiple perspectives

and then a scheme to optimize the monitoring system is put forward from on site experience. While optimizing the signal and display of condition monitoring

a standard process of finding

disposing and reporting the abnormal problems of protection devices based on the practical operation and maintenance experiences is also proposed.