Fluctuation Voltage Detection by Recursive DFT for Voltage Compensation Control in Power System

This paper presents the fluctuation voltage detection by using recursive DFT for voltage compensation control due to both harmonics and faults. The first priority is realized in an accuracy of a voltage oscillation and the quick offset voltage commanding. Accordingly, the DFT recursive is easily and accurately detected both under-voltage and over-voltage. As the results of experiments, the noises and harmonics have been precisely eliminated by DFT recursive.