Proposal of rural electrification feeder topologies based on induced voltage at isolated shielding wires

Abstract

This study analyses low-cost techniques for rural electrification based on the use of isolated shielding wires (ISW) of extra-high-voltage transmission line. The main idea is to use the transmission line loss as an auxiliary source to remote rural systems. The insulated shielding wire will behave as a natural capacitive voltage divider, promoting low voltage on ISW. Thus, we introduce a careful analysis of different topologies. A resonance circuit will improve the voltage regulation. A transient study was implemented to observe the behavior of both the transmission system and the rural feeder under typical switchings.