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Measurement and calculations of actual power system parameters in real-time have been carried out by Synchronized Phasor Measurement Units (PMUs). The applications of PMUs in power system are extended to protection, control and monitoring of wide area of power system. This research will present the real-time calculation of power system parameters using PMUs and their application in power system studies. The developed system has the capability of utilizing the designed PMU for analyzing the power system in real-time. A laboratory test setup was utilized to test real-time application of the developed PMU. This system uses different DAQs to gather voltage and current data, and measure power system parameters such as the voltage and current phasors, positive, negative and zero sequences, powers and frequency of each component. The results of PMUs were verified by measurement devices. The potential of the developed PMU system in calculating the power system stability index in real-time as well as the line parameters by the available phasors data was discussed.