Virtual FDR based frequency monitoring system for wide-area power protection

Abstract

There have been recent research activities on GPS-based FNET to prevent wide-area blackouts by monitoring frequency deviation. This paper presented a virtual FDR based monitoring system for monitoring regional frequencies in power grid modeling as an advanced research project for implementing intelligent wide-area protective relaying of South Korea. The system was implemented by modeling an actual 345 kV transmission system using EMTP-RV and by measuring voltages and currents at 5 regions. The frequencies were estimated with a frequency estimation algorithm using gain compensation. The virtual FDR based monitoring system was implemented and simulated in various failure conditions. © 2011 Springer-Verlag.