Wide-Area applications for enhancement of Estonian power system security

Over the years the power systems have become more stressed due to development of electricity markets and due to the connection of large amount of distributed generation. In order to guarantee reliable and secure system operation new approaches and technical solutions for network control should be implemented. Development of the power system monitoring and control equipment in recent years have enabled the engineers to build more sophisticated control and protection functions in order to increase the system security. Especially interesting possibilities are available when observable system includes Wide-Area based solutions. In this paper a brief overview of different Wide-Area solutions is provided and more sophisticated solutions based on Wide-Area measurements are proposed and analyzed in the context of Estonian power system security enhancement.