Análise das técnicas para a detecção de avarias em cabos subterrâneos de Média Tensão

Abstract

The medium voltage electrical network of the Regional Direction of the City of Maputo has overhead and underground lines for the distribution of electricity. Underground power lines, when they suffer a breakdown, put a part of the network temporarily out of service. Next, it became necessary to find strategies that would locate the fault in less time and accurately. Techniques such as Time Domain Reflectometry (TDR) using the Pulse Generator and post acoustic localization with new equipment that filters out external noise and only sends the noise caused by the pulse generator wave at the failure point to the headphones , proved to be a more effective and efficient technique than the bridge method. With the acquisition of the new technology integrated into a vehicle, it will provide an exponential reduction in the intervention time for breakdowns in the underground medium voltage cables of the Regional Direction of Maputo City and in this way EDM will have more billing hours and it’s customers will have less power outage time, reducing the damage caused by prolonged power outages on both sides.