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Technical-parameter calculation model for underground low-power electrical lines and indoor installations used in telecommunications
Modelo de cálculo de los parámetros técnicos de las líneas eléctricas de baja tensión subterráneas e instalaciones internas para uso en telecomunicaciones
DOI:
https://doi.org/10.15446/ing.investig.v31n3.26402Keywords:
PLT, BPL, inductance, capacitance, leakage conductance, resistance, characteristic impedance, propagation constant, attenuation (en)PLT, BPL, inductancia, capacitancia, conductancia, resistencia, impedancia característica, constante de propagación, atenuación (es)
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This article presents an analysis of electrical distribution theory for 60Hz-lines operating at low voltage, particularly underground lines and residential indoor installations. Such distribution lines' behaviour is observed as a function of frequency to consider any advantages regarding the potential use of power transmission lines (PTL) for transmitting telecommunication signals. A method for computing the secondary parameters is proposed which has been based on the primary parameters, namely inductance, capacitance, conductance and resistance. The secondary parameters so obtained were characteristic impedance, propagation constant (together with its real value) and the attenuation constant. Conductor configurations, insulation materials and gauges commonly used in Colombia were verified for such low-voltage lines. A mathematical model is proposed as a theoretical tool for analysing and predicting characteristic impedance pattern and the attenuations which occur at high frequencies, thereby complementing our group's previous work. Conclusions are drawn, together with a perspective regarding future work and applications.
En este documento se presenta un análisis de la teoría de las líneas eléctricas de 60 Hz para baja tensión, en particular las líneas subterráneas y las de instalaciones internas residenciales y su comportamiento con la variación de la frecuencia, para considerar su aprovechamiento como medio de transmisión de señales de telecomunicaciones PLT. A partir de los parámetros primarios: inductancia, capacitancia, conductancia y resistencia se propone un método para el cálculo de los parámetros secundarios: impedancia característica y constante de propagación junto con su componente real, la constante de atenuación. Se verifican las configuraciones, aislamientos y calibres de conductor más usados en Colombia para estas líneas de baja tensión y se propone un modelo matemático como herramienta teórica a los fines de analizar y predecir el comportamiento de la impedancia característica y la atenuación en altas frecuencias, complementando trabajos previos. Las conclusiones se muestran al final junto con la perspectiva de aplicación y trabajos posteriores.
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Copyright (c) 2011 Henry Bastidas Mora, Marlon Patiño Bernal, Gilma Inés Ángel Castillo
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