6533b85ffe1ef96bd12c2774
RESEARCH PRODUCT
Ground-Fault Current Transfer at the Transition Station of a Combined Overhead-Cable Line. A Parametric Analysis
Stefano Mangionesubject
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 linedescription
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, taking into account of all the relevant parameters.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-04-01 |