Comparison of DFT and Space Vector Method for Synchrophasor Measurement

Power system networks are rapidly and continuously changing, hence management and control system requires more accurate and reliable information on operating status of the grid for management. This information can be acquired in many ways and can consist of different types of data. Phasor Measurement Units (PMUs) are becoming prominent devices for electrical power system network. They are capable of measuring current and voltage amplitude, Frequency and Rate of Change of Frequency (ROCOF) in synchronized way. Various compliance classes and performance matrices for PMUs are prescribed as per the IEEE standard C37.118.1 for power system synchrophasor. This paper reviews the role of PMUs and compares DFT and space vector methods for synchrophasor estimation.

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