Line and neutral current harmonics characteristics in three-phase computer power systems

In this paper, analysis of the phase and neutral current harmonics in a three-phase computer power system is carried out under distorted and/or unbalanced supply voltage conditions. The impact of background voltage harmonics on the resultant harmonic currents produced by a large concentration of personal computers is investigated. Results obtained from the proposed approach, with Matlab, are compared to those obtained from simulations using the PSPICE software package.