Research on Inter-harmonic Detection Method Based on EEMD

摘要

A comparative analysis of the existing inter-harmonic detection methods are carried out for the small content, non-linear and volatility of characteristic. Based on HHT transform theory, a new inter-harmonic detection method based EEMD is presented by combining of the empirical mode decomposition and the ensemble empirical mode decomposition algorithm. The signal is decomposed into a single-component signal by EEMD, and then the frequency and amplitude of each component is accurately calculate through HHT transform, and the accuracy of this method is verified through simulation and measurement. Compared with the EMD algorithm, the proposed method can eliminate the false components and mode mixing and be suitable for the detection of inter-harmonic signal.