A coupled thermal and electrical soft sensor for ONAN distribution transformers

Author

Najar, Sami ; Tissier, Jean-Franois ; Cauet, Sbastien ; Etien, Erik

Author_Institution

R&D Eng., Itron, Poitiers, France

fYear

2015

fDate

17-19 March 2015

Firstpage

574

Lastpage

579

Abstract

This paper presents coupled thermal and electrical modeling for a ONAN distribution transformer. Thermal model based on the IEC 60076-7 standard will lead to estimate the oil temperature of the transformer. Thermal parameters are determined using Levenberg/Marquardt algorithm. Electrical model based on KAPP model will determine the transformer leakage resistance and inductance evolutions. Variations of leakage impedance according to transformer temperature are highlighted leading to a global adaptive model.

Keywords

IEC standards; electric impedance; electric resistance; inductance; transformer oil; IEC 60076-7 standard; KAPP model; Levenberg-Marquardt algorithm; ONAN distribution transformer; coupled thermal and electrical soft sensor modelling; inductance evolutions; leakage impedance; leakage resistance; oil temperature estimation; Inductance; Oil insulation; Power transformers; Resistance; Temperature; Temperature measurement; Temperature sensors; Thermal and electrical model; coupling model; distribution transformer; electrical parameters variation; parameters determination;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology (ICIT), 2015 IEEE International Conference on

Conference_Location

Seville

Type

conf

DOI

10.1109/ICIT.2015.7125160

Filename

7125160