Power system monitoring and control facilities on protective relays

It is now possible to consider integrating the functions of the power system protection systems with those of the local and remote data collection and control systems. A structured approach to this integration is necessary however, if the full benefits are to be realized. A solution which will solve many of the problems previously associated with this integration is presented together with an example of how it might in future be applied in a typical substation. The authors discuss the communication philosophy, the SCADA topology, hardware, and language involved in this approach