Abstract
This paper introduces a detection algorithm of flicker caused by interharmonics based on the voltage envelope extraction and analysis. Whether the interharmonic frequency is near the odd or the even harmonics, the envelopes show different characteristics. The envelope mean is calculated accordingly and the relationship between the envelope mean and the flicker signal is analyzed in detail. It concludes that the flicker frequency and amplitude can be obtained accurately through FFT of the envelope mean and amplitude correction. Simulation results verify the algorithm.
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