Two-area system analysis and control using real-time digital simulator

This paper studies the effects of inter-area oscillations on a practical two-area system using Real-Time Digital Simulator (RTDS). RTDS is a hardware-in-the-loop simulator, which enables the real-time analysis and testing of devices in a controlled environment before they are actually connected to the grid. We study the two-area system stability with and without power system stabilizer (PSS). The system is modeled in RSCAD (Real Simulation Computer Aided Design). We show that by finely tuning the PSS system, the harmful low frequency oscillations can be reduced by 50%.