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The simulation of power system behavior, especially transient behavior, helps us in the analysis and planning of various power systems. However, power systems are highly complex and geographically distributed. Therefore system partitioning can be used to allow for sharing resources in simulation. In this work, distributed simulations of power system models have been developed using an electromagnetic transient simulator, namely Real Time Digital Simulator. The goal is to demonstrate and assess the feasibility of both non-real-time and real-time simulations using RTDS in a geographically distributed scenario. Different protocols and options used in the communication between power systems have been studied and analyzed. In this work, a test bed has been developed for data transfer between a power system simulated in RTDS at Mississippi State University and the power system simulated in RTDS at Texas A&M University.Finally, a locally distributed wide area control test bed was also developed and simulated.ii DEDICATION This thesis work is dedicated to my parents, my best friend Indira and my advisor.

SUMMARYSeveral major blackouts in the past have shown the need for advanced wide-area monitoring and control (WAMC) techniques. Advanced synchrophasor visualization and monitoring can be realized with timereferenced power system data that are collected by phasor measurement units (PMUs) using synchronized clocks. Presently, PMUs are being deployed around the world at a rapid rate for various power system applications. When a necessary number of PMUs are installed at optimal locations throughout the network, the complete state of the system can be observed. PMUs take real-time measurements to determine the state of the power system and can be used to enhance state estimation efficiency. With PMUs in place, there are many control and protection schemes that can be implemented successfully to take preventive and corrective actions. These remedial action schemes (RASs) are classified by the IEEE Power System Relaying Committee (PSRC) as system integrity protection schemes (SIPSs). This work involved the development of a real-time hardware test bed in order to analyze the transient stability of a simulated power system by using synchrophasors to visualize system stress across a transmission line with and without load-shedding schemes. The real time digital simulator (RTDS 1 ) was used to model the power system in real time. PMUs, a satellite-synchronized clock, and a synchrophasor vector processor (SVP) were used to test the synchrophasor application.

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