In a method, operation of an electric power system which has a power utility automation system (1981-1984, 1991-1994) is monitored. The power utility automation system (1981-1984, 1991-1994) comprises a plurality of electronic devices, such as intelligent ...

The method involves detecting a measurement data at a measuring point of a power transmission line by using a measuring device (9,10). The detected measurement data is coupled on the power transmission line. The measurement data is transferred to a data ac...