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    Ageing behaviour of medium-voltage substations

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    CIRED 2019 - 1129.pdf (545.4Kb)
    Paper number
    1129
    Conference name
    CIRED 2019
    Conference date
    3-6 June 2019
    Conference location
    Madrid, Spain
    Peer-reviewed
    Yes
    Metadata
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    Authors
    Dalamaras, Petros, University of Wuppertal, Germany
    Zdrallek, Markus , University of Wuppertal, Germany
    Groß, Ulrich, Rheinische NETZGesellschaft mbH, Germany
    Knapp, Martin, Rheinische NETZGesellschaft mbH, Germany
    Schulze, Heike, Mitteldeutsche Netzgesellschaft Strom mbH, Germany
    Klöckner, Patrick, MVV Netze GmbH, Germany
    Straube, Axel, SWS Netze Solingen GmbH, Germany
    Gawlitta, Ralf, SWS Netze Solingen GmbH, Germany
    Abstract
    The ageing infrastructure, in conjunction with incentives to improve power quality and reliability of supply, pose considerable challenges for distribution system operators (DSOs). More and more components of electric power grids are on the verge of reaching their assumed maximum service life. Today's DSOs apply modern and optimised maintenance, as well as replacement strategies based on the knowledge of the actual condition of the operating electrical equipment. This enables an efficient and fair distribution of the limited budget over the individual grid areas. In addition to the condition of medium-voltage (MV) substations, knowledge of their ageing behaviour is essential for long-term, well-founded replacement strategies. The asset simulation tools used by DSOs are mostly based on the bathtub curve, which is intended to describe the hypothetical failure rate in the distribution grid versus time. This paper presents a new and innovative approach to derive condition-dependent ageing curves as a valid basis for decision making from the results of inspection data of MV substations. The more than 100.000 inspection results, available from eleven different DSOs, serve as a basis for this. In order to verify the ageing behaviour determined from the inspection data, extensive additional laboratory tests have been carried out on 84 MV switchgears. For the first time, significant findings regarding the actual ageing behaviour of MV substations can be obtained from the collected data and used for well-founded asset management decisions.
    Publisher
    AIM
    Date
    2019-06-03
    Published in
    • CIRED 2019 Conference
    Permanent link to this record
    https://cired-repository.org/handle/20.500.12455/309
    http://dx.doi.org/10.34890/537
    ISSN
    2032-9644
    ISBN
    978-2-9602415-0-1

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