The over view of study on harmonics in electric power system

With the development of electrical industry and the opening of the electricity market,various electric components of nonlinear that can generate high-order harmonics are widely used in the power system,the harmonics cause the voltage and current waveform distortion and it has been a threate to the safe operation and economic operation of power grids.Meanwhile,harmonics have influence and harm to other electrical equipment of power system.So designing a more accurate harmonic detection methods and reasonably efficient filtering equipment will be the main direction in harmonic study fields.This paper makes generating and harm of harmonics as starting point and summarizes several harmonic detection methods and the various measures of harmonic treatemen in harmonic study fields,it can provide effective reference path to detection and treatement of harmonic.