Crack propagation; Distributed parameter networks; Distribution of goods; Eigenvalues and eigenfunctions; Electric network analysis; Electric power distribution; Extraction; Harmonic analysis; Passive filters; Power electronics; Power quality; Radio systems; Water distribution systems; Wave filters; Control strategies; Current Harmonics; harmonic currents; Harmonic detection; Harmonic extraction; Harmonic propagation; International (CO); line impedance; Non-Linear Loads; Power distribution network (PDN); Power distributions; Voltage harmonics; Widespread use; Active filters