<?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>0121-750X</journal-id>
<journal-title><![CDATA[Ingeniería]]></journal-title>
<abbrev-journal-title><![CDATA[ing.]]></abbrev-journal-title>
<issn>0121-750X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Distrital Francisco José de Caldas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-750X2022000300200</article-id>
<article-id pub-id-type="doi">10.14483/23448393.19252</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Power Flow in Unbalanced Three-Phase Power Distribution Networks Using Matlab: Theory, analysis, and quasi-dynamic simulation]]></article-title>
<article-title xml:lang="es"><![CDATA[Flujo de potencia en redes de distribución eléctrica trifásicas no equilibradas utilizando Matlab: Teoría, análisis y simulación cuasi-dinámica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garcés-Ruiz]]></surname>
<given-names><![CDATA[Aleiandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tecnologica de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>27</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-750X2022000300200&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-750X2022000300200&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-750X2022000300200&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Context:  The power flow is a classical problem for analyzing and operating power distribution networks. It is a challenging problem due to a large number of nodes, the high r/x ratio -typical in low voltage networks- and the unbalanced nature of the load.  Method:  This paper review four methods for power flow analysis, namely: the conventional Newton&#8217;s method, Newton&#8217;s method in a complex domain, the fixed-point algorithm using Y bus representation, and the backward-forward sweep algorithm. It is well-known that Newton&#8217;s method has quadratic convergence, whereas the backward-forward sweep algorithm has linear convergence. However, the formal analysis of this convergence rate is less known in the engineering literature. Thus, the convergence of these methods is presented in theory and practice.  Results:  A set of simulations in the IEEE 900 node test system is presented. This system is large enough to demonstrate the performance of each algorithm. In addition, a Matlab toolbox is presented for making numerical simulations both for the static case and for quasi-dynamic simulations.  Conclusions:  Fixed point algorithms were faster than Newton&#8217;s methods. However, the latter required less number of iterations.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Contexto:  El flujo de potencia es un problema clásico para la operación de redes de distribución de energía. Es un problema desafiante debido a la gran cantidad de nodos, la alta relación r/x típica de las redes de baja tensión y la naturaleza desequilibrada de la carga.  Métodos:  Este documento revisa cuatro métodos para el análisis de flujo de potencia, a saber: el método de Newton convencional, el método de Newton en un dominio complejo, el algoritmo de punto fijo que utiliza la representación de admitancia nodal (Y bus) y el algoritmo de barrido hacia atrás y hacia adelante. Se presenta la convergencia de estos métodos en teoría y práctica. Es bien sabido que el método de Newton tiene convergencia cuadrática, mientras que el algoritmo de barrido hacia atrás y adelante tiene convergencia lineal. Sin embargo, el análisis formal de esta tasa de convergencia es menos conocido en la literatura de ingeniería.  Resultados: se desarrolla una caja de herramientas de Matlab para realizar simulaciones numéricas tanto en el caso estático como en una simulacion cuasi-dinámica usando el sistema de pruebe IEEE de 900 nodos.  Conclusiones:  Los algoritmos de punto fijo resultaron mas rapidos. No obstante, los algoritmos basados en Newton requirieron menor número de iteraciones.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[load flow]]></kwd>
<kwd lng="en"><![CDATA[Newton&#8217;s method]]></kwd>
<kwd lng="en"><![CDATA[Backward-forward algorithm]]></kwd>
<kwd lng="en"><![CDATA[power flow]]></kwd>
<kwd lng="en"><![CDATA[quasi-dynamic simulation.]]></kwd>
<kwd lng="es"><![CDATA[flujo de carga]]></kwd>
<kwd lng="es"><![CDATA[metodo de Newton]]></kwd>
<kwd lng="es"><![CDATA[algoritmo de barrido iterative]]></kwd>
<kwd lng="es"><![CDATA[flujo de potencia]]></kwd>
<kwd lng="es"><![CDATA[simulación cuasi-dinámica.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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