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Sensitivity analysis of a parallel-plate method for measuring the dielectric permittivity of high-voltage insulating materials

1 , 1 , , 1 , 2

High Voltage

The Institution of Engineering and Technology

sensitivity analysis, permittivity, insulating materials, capacitance measurement, plastic deformation, dielectric losses, sensitivity analysis, parallel-plate method, dielectric permittivity, high-voltage insulating materials, polymeric insulation materials, accelerated ageing, decommissioned installation, physical deformation, systematic sensitivity analysis, parallel-plate capacitance measurement approach, polymeric materials, capacitance plate, uncertainty measurement, relative permittivity, dielectric loss tangent, plate–plate separation, plate–sample separation, electrical noise

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      Abstract

      Ascertaining the dielectric character of polymeric insulation materials is of particular interest for comparative studies that use accelerated ageing and samples from decommissioned installations. In the case of polymeric samples, the possibility of physical deformation within the sample holder adds additional variability to comparative measurements. Using readily obtainable instrumentation, this study undertakes a systematic sensitivity analysis of a parallel-plate capacitance measurement approach for polymeric materials that only has one capacitance plate in contact with the sample, avoiding issues of sample deformation. The analysis demonstrates that the biggest contributor of uncertainty in the measurement of the relative permittivity and loss tangent is the precision with which the plate–plate and plate–sample separation is determined. The measurements show that the determination of loss tangent can be susceptible to uncertainties arising from electrical noise, but that these can be controlled further by utilising more refined instrumentation.

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      Most cited references 16

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            Author and article information

            Affiliations
            [1 ] Department of Electrical and Computer Engineering, University of Manitoba , 75a Chancellor's Circle, Winnipeg, Manitoba, Canada R3T 5V6
            [2 ] Manitoba Institute for Materials, University of Manitoba , 25 Sifton Road, Winnipeg, Manitoba, Canada R3T 2N2
            Contributors
            ORCID: 0000-0003-4552-8928
            Journal
            HVE
            High Voltage
            High Volt.
            The Institution of Engineering and Technology
            2397-7264
            2397-7264
            11 May 2017
            6 June 2017
            September 2017
            : 2
            : 3
            : 200-204
            10.1049/hve.2017.0038 HVE.2017.0038 HVE.2017.0038.R1

            This is an open access article published by the IET and CEPRI under the Creative Commons Attribution-NonCommercial-NoDerivs License ( http://creativecommons.org/licenses/by-nc-nd/3.0/)

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