A Novel Methodology of Inter-Harmonic Detection Based on VMD

Abstract

This paper presents a variational mode decomposition (VMD) algorithm and applies it to the detection of inter-harmonics for the first time. The specific process of inter-harmonics detection based on VMD is provided. The power signal to be detected is decomposed into several Intrinsic Mode Function (IMF) components by VMD, then the inter-harmonics frequency and amplitude parameters is obtained by extracting the resulting IMF component through Hilbert-Huang transform (HHT). The simulation results and practical measurements show that VMD is an effective new method for detecting inter-harmonics.