Abstract
Harmonic Voltage and flicker measurements have been conducted at Universidad de El Salvador since 2005. Compliance has been analyzed in reference to the national power quality standard issued by SIGET (General Superintendence of Electricity and Telecommunications). Third harmonic and total harmonic distortion voltage levels have been increasing sustainably since 2005 due to the evolution of loads and systems connected to the distribution network. Individual distortion 95% values for 3 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> harmonic voltage are about to exceed the limits established by SIGET, IEEE-519 and EN50160 standards. Public utilities have reported overloading of grounding transformers due to the presence of 3 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> harmonic currents.
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