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Journal of Energy : Energija, Vol. 69 No. 3, 2020.

Original scientific paper

https://doi.org/10.37798/202069341

Uncertainty estimation of low voltage LI measurements with recurrent surge generator and oscilloscope

Zdenko Godec ; Končar – Electrical Engineering Institute, Fallerovo Šetalište 22, HR-10000 Zagreb, Croatia
Vjenceslav Kuprešanin ; Končar – Electrical Engineering Institute, Fallerovo Šetalište 22, HR-10000 Zagreb, Croatia
Filip Razum ; Končar – Electrical Engineering Institute, Fallerovo Šetalište 22, HR-10000 Zagreb, Croatia

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Abstract

Low voltage LI measurement with recurrent surge generator and oscilloscope is a method used for investigating
LI distribution in transformer windings or in model prototypes for various conditions. In the paper, the procedure for
measurement uncertainty estimation of characteristic voltage and time quantities is given. The procedure is similar to the
procedure given in the IEC 60076-2 standard for high voltage testing, but it is fully adapted to low voltage measurement with
recurrent generator and oscilloscope. For the purpose of reducing the measurement uncertainties and the measurement time,
a new procedure is proposed.

Keywords

Low voltage lightning impulse measurement, measurement uncertainty, complete measurement result, stability, repeatability, nonlinearity

Hrčak ID:

247124

URI

https://hrcak.srce.hr/247124

Publication date:

30.6.2020.

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