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Overstress Management in Substation Equipment: Activity Report 2014

This report, convened by Antonio Carvalho and prepared with contributions from 15 active members from various countries, discusses the work of Working Group A3.30 on overstress management for substation equipment. It covers stress parameters, equipment capabilities, and risk mitigation measures. The report summarizes activities up to March 2014, outlining completed tasks and future action items, including improving oversight processes and establishing guidelines. The findings aim to enhance equipment durability and operational safety in substations.

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Overstress Management in Substation Equipment: Activity Report 2014

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  1. WG A3.30SUBSTATION equipment OVERSTRESS Activity Report 2014 Convener: Antonio Carvalho - BR Secretary: Jorge Amon - BR Number of Members: 15 Regular Members: 11 (BR, CH, USA, NE, IN, CR, FR, SA) Corresponding Members: 4 (D, BR, JP, CA) Dismissed inactive members: 4 March 2014

  2. Five meeting until date: September 2011 in Vienna, March 2012 in Baden, • August 2012 in Paris, March 2013 in Rio, • September 2013 in Johannesburg. • Work divided in 6 different topics: • 1. Stressing parameters: • - Environmental, Electrical, Dielectric, Mechanical, Prioritization of stressing parameters • 2. Equipment capabilities • - Standards, Test protocols, Specification, Influence of aging (WG A3.29) • 3. Review of utilities processes to assess potential overstresses risk • 4. Measures for risk mitigation: • - What utilities do (or should do) to mitigate equipment´s overstress risks? • 5. Proposal for improvements on the overstress management process: • -gapanalysis of utilities overstress management X main stressing parameters & available information on equipment capabilities • - proposals for improvement & recommended processes • - suggestions for standards improvements • 6. Brochure annexes: • - overstress checking procedures for selected equipment and stress parameters. Activities & discussion items March 2014

  3. State of the work: • Item 1 (Stressing parameters) already concluded; • Item 2 (Equipment capabilities): • standards analysis to be finalized next meeting; • test protocols and specification analysis to be prepared for sept./2014; • Aging influence: waiting for WG A3.29 results; • Item 3 (Review of utilities processes): • Experiences so far collected: ONS, AXPO, EDF, LIANDER, BPA, VLPGO (NG, TERNA, REE, ONS & RTE)  first draft foreseen for sept./2014; • Item 4 (Measures for Risk Mitigation): • Experiences so far collected: ONS, AXPO, EDF, LIANDER, BPA, VLPGO (NG, TERNA, REE, ONS & RTE)  first draft foreseen for sept./2014; • Item 5 (Proposal for improvements): last task, conclusion foreseen for May 2015 • Item 6 (Annexes): already started for CB and CT, conclusion foreseen for March 2015 Activities & discussion items March 2014

  4. Membership March 2014

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