<?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>1815-5901</journal-id>
<journal-title><![CDATA[Ingeniería Energética]]></journal-title>
<abbrev-journal-title><![CDATA[Energética]]></abbrev-journal-title>
<issn>1815-5901</issn>
<publisher>
<publisher-name><![CDATA[Universidad Tecnológica de La Habana José Antonio Echeverría, Cujae]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1815-59012019000200103</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La protección de distancia y las condiciones de prefalla]]></article-title>
<article-title xml:lang="en"><![CDATA[The distance protection and the pre-fault conditions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PérezBaluja]]></surname>
<given-names><![CDATA[Osmel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[TorresBreffe]]></surname>
<given-names><![CDATA[Orlys Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Padrón]]></surname>
<given-names><![CDATA[Lenyer]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tecnológica de La Habana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Empresa Eléctrica de La Habana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2019</year>
</pub-date>
<volume>40</volume>
<numero>2</numero>
<fpage>103</fpage>
<lpage>111</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1815-59012019000200103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1815-59012019000200103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1815-59012019000200103&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En la actualidad en los Sistema Eléctricos de Potencia, en ocasiones se continua utilizando la función de distancia (21) como protección principal en líneas de transmisión lo que no es correcto ya que la protección de distancia se ve afectada por múltiples fenómenos, dígase oscilaciones de potencia, efecto de la inducción mutua entre líneas, condiciones de prefalla, que pueden llevar a una incorrecta operación de la protección, así como también la incapacidad de disparo simultáneo en ambos extremos de la línea que protege. En este trabajo se presentan los resultados del análisis matemático de un sistema con líneas de 110 kV donde se evidencian los fenómenos y dificultades que introducen a la protección de distancia tomando solo en cuenta el efecto negativo de las resistencia de falla y las condiciones que existían antes de la falla, así como también sus posibles soluciones las cuales no resultan totalmente efectivas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In the present time in the Electric System of Power, in occasions you continuous using the distance function (21) as main protection in transmission lines what is not correct since the distance protection is affected by multiple phenomena, say you oscillations of power, effect of the mutual induction among lines, pre-fault conditions that can take to an incorrect operation of the protection, as well as the inability of simultaneous shot in both ends of the line that it protects. In this work the results of the mathematical analysis of a system are presented with lines of 110 kw where the phenomena and difficulties are evidenced that introduce to the distance protection taking alone in bill the negative effect of the flaw resistance and the conditions that existed before the flaw, as well as their possible solutions which are not completely effective.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Protección de distancia]]></kwd>
<kwd lng="es"><![CDATA[condiciones de Prefalla]]></kwd>
<kwd lng="es"><![CDATA[Cortocircuito]]></kwd>
<kwd lng="es"><![CDATA[Resistencia de falla]]></kwd>
<kwd lng="en"><![CDATA[Distance Protection]]></kwd>
<kwd lng="en"><![CDATA[Pre-Fault]]></kwd>
<kwd lng="en"><![CDATA[Short circuit]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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