Search results for " Power cables"

showing 2 items of 2 documents

Ground-Fault Current Transfer at the Transition Station of a Combined Overhead-Cable Line. A Parametric Analysis

2007

When a substation is fed by a combined overhead-cable transmission line, a significant part of the ground fault current flows through the grounded cable sheaths and discharges into the earth at the transition station, where cables are connected to the overhead line. If the transition station is a dead-end steel pole structure, the local ground electrode, small and of high resistance, could be inadequate to maintain the ground potential rise within safety limits in case of a fault to ground at the receiving end substation. Based on a circuit model approach, the paper presents a parametric analysis of the fault current distribution between the faulted substation and the transition station, ta…

EngineeringParametric analysisbusiness.industryElectrical engineeringFault (power engineering)Line (electrical engineering)law.inventionSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaTransmission linelawTransfer (computing)Overhead cableSubstations Fault currents Circuit faults Power overhead lines Power cables Cable shielding Satellite ground stations Steel Electrodes SafetyCurrent (fluid)businessComputer Science::Operating SystemsOverhead line
researchProduct

PCB-Based Planar Inductive Loops for Partial Discharges Detection in Power Cables

2022

Partial discharge (PD) diagnosis tests, including detecting, locating, and identifying, are used to trace defects or faults and assess the degree of aging in order to monitor the insulation condition of medium- and high-voltage power cables. In this context, an experimental evaluation of three different printed circuit board (PCB)-based inductive sensor topologies, with spiral, non-spiral, and meander shapes, is performed. The aim is to assess their capabilities for PD detection along a transmission power cable. First, simulation and experimental characterization are carried out to determine the equivalent electrical circuit and the quality factor of the three sensors. PD activity was studi…

inductive loops; PCB-based inductors; partial discharges; defects detection; HV power cablespartial dischargeSettore ING-IND/31 - ElettrotecnicaHV power cablesElectrical and Electronic EngineeringPCB-based inductorBiochemistryInstrumentationAtomic and Molecular Physics and Opticsdefects detectionAnalytical Chemistryinductive loop
researchProduct