A study of the fundamental principles to power system harmonic

This paper is to present the harmonic phenomenon. The Fourier series is the tool for harmonic analysis in order to interpret waveforms behavior due to nonlinear loads is carried out. Some harmonics measurements for nonlinear loads are also observed. The harmonics theory, definition of harmonic quantities, related harmonics problems in power distribution systems are explained. Also, filter applications such as passive filter in overcoming harmonic problems are discussed. This paper also investigate the recent developments for active power filter uses power electronic switching to generate harmonic currents that cancel the harmonic currents from a nonlinear load is then described.