Conception of power substation supervision system

Continuous progress in power system development and new challenges connected with reliability of the system extract development of remote control of power substations. Among other things substation's auxiliary subsystem needs to be controlled in remote mode. The paper presents first results of the project sponsored by PSE-Operator and executed by Warsaw University of Technology. The project goal is to prepare general hints for designing of the auxiliaries' supervision system for highest voltage substations. The general concept of the supervision was prepared. The information from the system is sent to several computers both in the substation and out of the substation. It is very important to protect external connections, particularly by public network (intemet), against computer's attacks.