Description: Article_herra Distorted voltage and current waveforms is one of
the problems associated to electric power quality. Continuous
use of non-linear loads provokes the existence of voltage
waveforms with a high distortion. Thus, it is necessary to know
the responsible of this problem by means of the commonly
named distortion sources identification. In this paper, the
problem is analyzed through the harmonic power sign, with the
objective of knowing the sense of harmonic power flow
between source and one load in distorted systems. Nowadays, it
has already been established in the Literature that an analysis of
this kind does not solve the problem. Recently, new indices
have been introduced to evaluate a specific consumer distortion
level. In this paper, a comparative analysis of these indices is
carried out, having as reference a practical case. The results
obtained show that, in fact, these indices can help to valuate the
harmonic distortion, although none of them solve the question
definitively
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