Detection of parallel discharges in gas insulated substations
- 1 July 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Delivery
- Vol. 7 (3), 1239-1249
- https://doi.org/10.1109/61.141837
Abstract
Four methods for partial discharge (PD) detection in gas-insulated substations were considered. Laboratory tests were carried out to determine the efficiency of these methods to detect defects and to discriminate among different defect types. The sensitivity of the methods is compared and the applicability of the methods in the field is discussed. In the laboratory the standard PD measuring method showed a good sensitivity to defects. In the field condition the standard PD measuring method can have a sensitivity much lower than in laboratory, due to the rather high noise level expected. In the laboratory two of the alternative PD detection methods (namely the acoustic method and electrical method including a field probe inside the GIS) have shown a sensitivity to fixed-type defect discharges, while showing less efficiency relative to the mobile particles considered in the study.Keywords
This publication has 5 references indexed in Scilit:
- Acoustic diagnosis of gas insulated substations: a theoretical and experimental basisIEEE Transactions on Power Delivery, 1990
- Diagnostic measurements at UHF in gas insulated substationsIEE Proceedings C Generation, Transmission and Distribution, 1988
- Discharge Characteristics of Gaseous DielectricsIEEE Transactions on Electrical Insulation, 1986
- SF6 Decomposition in Gas-Insulated EquipmentIEEE Transactions on Electrical Insulation, 1986
- Methods of Particle Control in SF6 Insulated CGIT SystemsIEEE Transactions on Power Apparatus and Systems, 1982