Impact of small voids in solid insulating materials

Lerchbacher, Markus; Sumereder, Christof; Lemesch, Gerhard; Ramsauer, F.; Muhr, M.

doi:10.1109/icpadm.2012.6318994

Cited by 1 publication

(1 citation statement)

References 6 publications

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“…PD only partially bridges the distance between two electrodes or an electrode and an isolator. Long-time appearance of PD may lead to disruptive discharges, as isolating materials are eroded by PD [3].…”

Section: Conventional Partial Discharge Measurementmentioning

confidence: 99%

Economical and practicable condition assessment of MV- and LV-distribution grids

Johae

Beerboom

Pawlowski

et al. 2017

CIRED - Open Access Proceedings Journal

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This paper describes a procedure of condition assessment for distribution grids which is applicable in an economical, non-intrusive and practical way. The assessment procedure is based on periodic visual inspections. It is additionally supplemented by suitable and simple measurement methods which can be used without any disconnection of the components and thus without much additional effort during an inspection. Therefore suitable non-intrusive measurement methods for medium voltage substations and switchgears as well as low voltage distribution cabinets will be presented in relation to an integrated condition assessment of distribution grids. But significance of these non-intrusive measurement methods is limited. Using the example of acoustic partial discharge detection measurement uncertainties will be determined by intensive laboratory tests and numerous field tests realized with several German distribution system operators. These values will be combined with condition information of visual inspections by using theory of evidence to express the uncertainty. Since measurements and visual inspections detect different kinds of deficiencies of electrical equipment, a combination of both is crucial to achieve a high significance of condition assessment as shown in this paper.

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Section: Conventional Partial Discharge Measurementmentioning

confidence: 99%