Internet as a tool for monitoring of power system protection and its operation

The idea and realization of automatic data transfer from digital relays and disturbance recorders to the "protective relay monitoring center" in Electro-Slovenia (ELES) is presented. The use of Internet enables the access to relay and disturbance recorder data as well as data in the event database. Developed software logs each event in the database and sends an SMS note to the protection engineer who is on duty. Therefore, the information regarding the event in the power system is provided immediately. As a result, a higher availability of the entire power system is achieved, since data available from relays and disturbance recorders can be monitored and controlled wherever the Internet access is provided in the world.