<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0123-3033</journal-id>
<journal-title><![CDATA[Ingeniería y competitividad]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. compet.]]></abbrev-journal-title>
<issn>0123-3033</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-30332018000100063</article-id>
<article-id pub-id-type="doi">10.25100/iyc.v20i1.4222</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Study of the electrical Power quality in the common connection point between a 7.8 kWp PV system and a low-voltage network]]></article-title>
<article-title xml:lang="es"><![CDATA[Estudio de la calidad de la energía en el punto común de conexión entre una red de baja tensión y un sistema solar fotovoltaico de 7.8 kWp]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valverde-Granja]]></surname>
<given-names><![CDATA[Agustín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Souza]]></surname>
<given-names><![CDATA[Teófilo M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magalhães-Sobrinho]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Ibagué Faculty of Engineering ]]></institution>
<addr-line><![CDATA[Ibagué ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Estadual Paulista UNESP Faculty of Engineering ]]></institution>
<addr-line><![CDATA[São Paulo ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>20</volume>
<numero>1</numero>
<fpage>63</fpage>
<lpage>73</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-30332018000100063&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-30332018000100063&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-30332018000100063&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract An experimental 1,000 kWh/month PV solar system was connected to a low-voltage network at the Universidad de Ibagué, Colombia. In this work, we present the findings about the electrical voltage issues in the common connection point. The characterization of the low-voltage network was based on the NTC 5001 standard, including aspects such as voltage imbalance, intermittency, short and long-term flicker, and harmonics. The maximum energy production was 850 kWh /month, equal to the 72.65 % of the total installed capacity. In this condition, the minimum voltage measurements evidenced a 2 % increase from the previous value, the voltage imbalance was 3.5 to 70 % lower, and the voltage harmonics (TDH) increased 7, 0.8 and 3 % in the phases U1, U2 and U3, respectively. Current harmonics did not show significant increases in lines U2 and U3, line U1 recorded an increase of 22 %, but there were no significant variations in the short and long-term flicker, notches and interruptions. Regarding the electrical power, the active and reactive components increased 58 and 42 %, respectively, and the thermographic study indicated a 7.5 % increasing temperature after the installation of the experimental PV system. This experience aims to be a reference project in the implementation of the Act 1715 of the Colombian government to promote solar systems.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este trabajo presenta, el estudio de los problemas de tensión originados en el punto común de conexión de una red experimental de 1,000 kWh/mes de energía solar en la ciudad de Ibagué, Colombia. La red de baja tensión fue caracterizada de acuerdo con la NTC 5001e incluye aspectos como desequilibrio de tensión, intermitencia, flicker de corto y largo plazo, fluctuaciones y harmónicos. La energía máxima producida por la fue de 850 kWh/mes, equivalente al 72.65 % de la capacidad instalada, con relación a las perturbaciones de larga duración se tuvo un incremento del 2 % con respecto al valor mínimo de la tensión registrada; el desequilibrio de tensión disminuye entre el 3.5 y el 70 % y los harmónicos de tensión (THD) aumentaron el 7 % en la línea U1, 0.8 % en la línea U2 y 3 % en la línea U3. Los harmónicos de corriente no presentaron incrementos significativos en las líneas U2 y U3, la línea U1 registró un incremento del 22 %. Los valores de flicker de corta y larga duración, las muescas de tensión (Notches) y las interrupciones de larga duración no registraron diferencias significativas, la potencia activa y reactiva total se incrementaron en 58 y 42 %, respectivamente. El estudio termográfico permite establecer un incremento de temperatura de 7.5 % después de la implementación de la red experimental. Se espera que la experiencia en el proyecto pueda servir de referencia en la aplicación de la ley 1715 del gobierno de Colombia para el aprovechamiento de la energía solar.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Low voltage network]]></kwd>
<kwd lng="en"><![CDATA[Power quality]]></kwd>
<kwd lng="en"><![CDATA[solar PV system]]></kwd>
<kwd lng="en"><![CDATA[experimental network]]></kwd>
<kwd lng="es"><![CDATA[Baja tensión]]></kwd>
<kwd lng="es"><![CDATA[calidad de la energía]]></kwd>
<kwd lng="es"><![CDATA[energía solar]]></kwd>
<kwd lng="es"><![CDATA[red experimental]]></kwd>
</kwd-group>
</article-meta>
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