The harmonic wave standard of public power network, calculation method of harmonic wave were introduced.

Suppression technology of input current harmonic and conducted electro-magnetic emission for arc welding equipment

These current harmonics exists in any nonzero speed and are independent of time-varying parameters,such as stator winding resistance.

This paper presents the current harmonic analysis of a high frequency model of AC/DC voltage source converter using PWM with phase and amplitude control.

PS-3000 harmonic current test system based on BP algorithm;

Shunt active filter based on harmonic current quick measuring method;

Assess harmonic currents of electric locomotive with Laguerre polynomials;

A filter for reducing harmonic currents in stator windings of 6-phase induction motor;

Based on the instantaneous reactive power theory, two groups of three-phase unit symmetrical rotating reference phasors with same frequency as that of power grid voltage is built and a novel approach to accurately detect harmonic currents by use of active power filter (APF) is proposed.

To eliminate the influence of AC side harmonic currents, a certain capacity of AC filters is installed correspondently, and the cost of them amount to 10% percent of a HVDC project cost, which is very important to the performance and cost of HVDC project.