HIGH VOLTAGE LINES: ISOLATED GUARD CABLES CAN BE POWER SOURCES FOR RURAL ELECTRIFICATION

Author's Name: Alphonse OMBOUA
Subject Area: Science and Engineering
Subject Engineering
Section Research Paper

Keyword:

Guard cable, Induced voltage, One phase transformer, Rural electrification, Developing countries.


Abstract

In Africa, rural electrification is still facing difficulties; The technique of isolated guard cables may be one of the promising solutions for villages located near high voltage lines.The guard cable of the high voltage lines is the conductor placed above the others, its main objective is to protect the line against atmospheric discharges.This cable is normally linked to the earth through pylons and is not useful for any transmission of electricity.Once this cable is isolated from pylons, it becomes one of the armatures of the capacitor, the other being composed of other conductors and we can get inducedvoltage both capacitive (mainly) and inductive effects.A conductor directly connected to this isolated guard cable can extract some energy owing to a one phase transformer, the return current going to the earth.This paper describes such technique and show the predetermination method of obtained induced voltage and potential power to extract. Here, an example of calculation is detailed.Such technique would benefit from a large dissemination especially to the developing countries where electric problems are not yet solved in rural area.

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