Windowed DFT Method for Frequency Measurement Involving Amplitude Modulation

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Abstract:

A windowed DFT method is proposed for power system frequency measurement involving amplitude modulation. First, an error analysis of conventional DFT based method considering amplitude modulation is given. Second, a noval a window DFT function is proposed method to eliminate these errors is given based on the relation among three consecutive DFT values. Due to its high precision and low required processing effort, the proposed algorithm is a good candidate for online frequency measurement.

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Advanced Materials Research (Volumes 986-987)

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1634-1637

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July 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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