Naslov
CIGRÉ Technical Brochure No. 511: Final Report of the 2004 – 2007 International Enquiry on Reliability of High Voltage Equipment, Part 3 - Disconnectors and Earthing Switches

Autori
Carvalho A. ; Cormenzana M. L. ; Furuta, H. ; Grieshaber, W. ; Hyrczak A. ; Kopejtkova D. ; Krone, J. G. ; Kudoke, M. ; Makareinis D. ; Martins, J. F. ; Meštrović, Krešimir ; Ohno I. ; Östlund, J. ; Park, K.-Y. ; Patel, J. ; Protze, C. ; Runde, M. ; Schmid, J. ; Skog, J. E. ; Sölver, C. E. ; Sweeney, B. ; Waite, F.

Vrsta, podvrsta i kategorija knjige
Autorske knjige, ostalo, strucna

Izdavač
CIGRÉ

Grad
Pariz

Godina
2012

Stranica
148

ISBN
978-2-85873-203-6

Ključne riječi
high voltage equipment; reliability; maintenance; enquiry; disconnectors; earthing switches; major failures; minor failures; major failure frequencies; failure characteristics

Sažetak
This report gives the results of the 1st international enquiry on reliability of high voltage disconnectors and earthing switches that was circulated in 2003 as part of a wider survey on the reliability of switchgear and related equipment. The survey collected population and failure data for disconnectors and earthing switches that were in service during the years 2004 to 2007 inclusive. The scope of this survey was all disconnectors and earthing switches from air insulated switchgear (AIS) and gas insulated switchgear (GIS) substations with voltages above 60 kV. All dana in this report are for 3-phase equipment. The report analyzed the returned survey response data for disconnectors and earthing switches providing service experience and failure frequency information. The information is organized in two main sections: AIS disconnectors and earthing switches and GIS disconnectors and earthing switches. Concerning title designation used in tables and graphs, two common expressions are used: AIS DE (+ title of table or graph) and GIS DE (+ title of table or graph). This format explicitly informs the reader as to whether the table/graph refers to air insulated disconnectors and earthing switches (AIS DE) or gas insulated disconnectors and earthing switches (GIS DE). Within each section, the results summarized in tables and graphs are commented with findings and conclusions concerning the following issues: service experience, major failures and minor failures, major failure frequencies and failure characteristics. Furthermore, customized analyses, such as analysis by design of the equipment (which includes the component at service voltage and the kinematic chain) or drive (which includes operating mechanism as well as electrical control and auxiliary circuits), were performed for disconnectors and earthing switches. Additionally, the AIS disconnectors and earthing switches section includes a short analysis on maintenance. The calculation of major failure frequencies for AIS and GIS is based on the matching of service experience data with major failures only. For service experience distributions, all available (matched and mismatched) data were used. Therefore, it is not possible to calculate or recalculate any major failure frequency from the published total service experience and total failure data. Because of the assumed underreporting of minor failures there is no calculation of minor failure frequencies in this survey. Because of two prevailing countries, it was necessary to carry out two separate analyses: one analysis with all data and another analysis with all data excluding the two prevailing countries. In order to compare the results of these analyses hypothesis tests were performed. The tests show if the subpopulation (all data without two prevailing countries) has an equal behavior as the total population (all data). The major results, conclusions and recommendations resulted from the analyses are presented in the last three sections of this report.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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