An intelligent diagnosis method for analog of the secondary equipment based on the remote dispatching station

The state of the relay protection is very important, but its own state has been neglected due to the lack of online monitoring and diagnosis. Therefore, there is an urgent need to carry out automatic inspection and online analysis of the operating status of secondary equipment. The automatic inspection of the secondary equipment can find the abnormality of the analog acquisition loop in time, and then give the analysis results and suggestions online, which can greatly improve the efficiency of field operation and maintenance. In this paper, a method of normalization of channel name based on keywords is proposed, the scheme of relay protection analog comparison is designed based on the maximum length matching algorithm. It can effectively improve the accuracy and efficiency of the analog inspection, and avoid the error inspection caused by human.