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Detection and Location of Faults in Wide Area Systems based on Error-Dependent Communication Strategy Preethi Priya Vallapu Transmission system serves as a crucial link between generating stations and consumers. Early detection and accurate location of faults on transmission lines are essential to prevent the occurrence of blackouts. Also real time monitoring of power system states during faults will enhance the situational awareness for power system operators. Wide Area Measurement and Protection Systems (WAMPS) based on Phasor Measurement Unit (PMU) are a promising solution for dynamic real time monitoring and protection of power system. This thesis deals with detection and location of faults on a transmission system based on synchrophasor technology. Performance of WAMPS is largely dependent on the performance of its information and communication technologies infrastructure. Error-dependent communication strategy is employed in this work for communication of real time data from PMU to the centralized controller. As PMUs are expensive, they cannot be placed at every bus. Hence linear state estimator based on synchronized measurements is employed for estimating the state of the entire system. The estimated states of the system are then compared to a certain threshold and if any abnormality is found, fault is detected. Once the faulted bus is detected, two-terminal algorithm is employed to identify the exact location of fault. The proposed methodology is implemented on IEEE 9 bus system developed in MATLAB/SIMULINK environment.