Abstract
Abstract The values of voltage / current signal at various places in a power network are measured by Phasor Measurement Unit(PMU). The PMU's work on the phasor values of the data collected using Phasor estimation technique. This mechanism is essential for analysis and interpretation of collected data in a correct manner. Therefore, a Phasor estimation process has a lot of importance in design of control mechanism and various protection systems to be implemented. Numbers of PMUs are being installed across the world for different applications such as post fault analysis, state estimation and protection of power system. Since the cost of PMUs is very high, they are placed optimally in the power system such that complete power system is observable. In this study, PMU along with techniques used for phasor measurement has been reviewed. Some of the used phasor estimation techniques viz. zero crossing, DFT and SDFT are described to compute magnitude and phase value of input signal.
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