Abstract
This work analyzes potentials variables that affect neutral currents when the receptors connected present nonlinear characteristics. Different scenarios were simulated in the Alternative Transients Program combining the type and number of load units, successively fed with sinusoidal, symmetric, balanced, asymmetric and unbalanced power supply voltage. The effect of harmonics on source voltage was also studied. Field measurements were registered in a computer center to contrast results. A variation of up to 5% in the neutral current was registered as product of the simulations with asymmetric and unbalanced sources. The analysis of the diversity effect showed variations of a little more than 10% whereas the attenuation effect caused a 20% reduction. The results show that the asymmetries and unbalances in the feeding sources have a slight incidence on neutral currents, whereas the diversity and attenuation effects are more important.
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