DEVELOPMENT OF A SENSOR FOR MONITORING THE PAPER CONDITION USING INFRARED SPECTROSCOPY

verfasst von

Büsra Özdemir, Yunfei Wang, Peter Werle

Abstract

The service life of a power transformer depends mainly on its insulation system. As the insulation system ages, the electrical and dielectric properties of the insulation decrease. High temperatures, acids and water accelerate ageing. Acids are a product of cellulose degradation and oil ageing. Cellulose degradation mainly results in polar low-molecular-weight acids, which accumulate in the paper and considered to be highly harmful. Currently, the total acid number (TAN) of the insulating oil is used to assess the condition of the insulating material. However, monitoring the acidity of the insulating paper is a more feasible method as harmful acids remain there. It is reasonable to develop a tool to monitor the acid in the paper that can be done directly, non-destructively and at a low cost. Fourier transform infrared spectroscopy (FTIR) can be used to detect changes in the chemical structure of the insulating paper and identify acids. Acids have a specific absorption peak in the spectrum and the intensity of the absorbance determines the acid concentration. For this reason, a basic functional model of an online-monitoring system was developed.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Typ

Aufsatz in Konferenzband

Band

2023

Seiten

345-349

Anzahl der Seiten

5

Publikationsdatum

2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeiner Maschinenbau

Elektronische Version(en)

https://doi.org/10.1049/icp.2024.0520 (Zugang: Geschlossen)