Izvorni znanstveni članak

INFLUENCING FACTORS IN INSULATION MODEL TESTING

Petar Gabrić ; Končar - Electrical Engineering Institute Inc.
Antun Mikulecky ; Končar - Electrical Engineering Institute Inc.
Damir Ilić ; Faculty of Electrical Engineering and Computing (FER), Zagreb
Vladimir Podobnik ; Končar Power Transformers Ltd., A joint venture of Siemens and Končar

Sažetak

The aim of this paper is to examine different factors that influence the quality of insulation models
high voltage testing results. These factors are related to model geometry and model testing procedures.
Model geometry is visually checked, several influencing factors are detected and their influence on el.
field calculation results is evaluated using finite element method (FEM) and cumulative method for oilbarrier
insulation design. The procedure for model geometry uncertainty estimation is performed using
first-order Taylor series approximation. Also, the influence of previous voltage exposure history of a
specimen, so-called “memo effect”, is estimated with a cumulative exposure method.

Ključne riječi

oil-barrier insulation; cumulative method; influencing factor; model uncertainty; sensitivity coefficient; step-by-step method

Hrčak ID:

199073

URI

https://hrcak.srce.hr/199073

Datum izdavanja:

15.8.2017.

Posjeta: 749 *