Comparison of the mineral oil lifetime estimates obtained by differential scanning calorimetry, infrared spectroscopy, and dielectric dissipation factor measurements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F17%3A43930432" target="_blank" >RIV/49777513:23220/17:43930432 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0040603116303410" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0040603116303410</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tca.2016.12.002" target="_blank" >10.1016/j.tca.2016.12.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of the mineral oil lifetime estimates obtained by differential scanning calorimetry, infrared spectroscopy, and dielectric dissipation factor measurements

Popis výsledku v původním jazyce

In this study, improved observables and new endpoint criteria were developed to assess the remaininguseful life of mineral transformer oil using differential scanning calorimetry (DSC) and Fourier transforminfrared spectroscopy (FT-IR). The tested oil was exposed to thermal ageing at temperatures of 110,120 and 130◦C for times ranging from 100 to 2400 h. The intensity of the infrared spectral band of thelow-temperature inhibitor and the temperature of the thermo-oxidative DSC peak were considered forevaluation. The obtained results were correlated with standardized dielectric dissipation factor (tan)measurements. The results indicated that the analysed observables changed continuously during theapplied thermal ageing. The endpoint criteria were subsequently determined and Arrhenius diagramswere constructed. The results demonstrated that the determination of the actual state or the lifetime ofthe transformer oil via DSC or FT-IR may be beneficial in terms of reducing the measurement time, theinfluence of moisture on the measurement results and the oil volume required for the tests. Thus, DSCand FT-IR represent promising alternatives to dissipation factor measurements.

Název v anglickém jazyce

Comparison of the mineral oil lifetime estimates obtained by differential scanning calorimetry, infrared spectroscopy, and dielectric dissipation factor measurements

Popis výsledku anglicky

In this study, improved observables and new endpoint criteria were developed to assess the remaininguseful life of mineral transformer oil using differential scanning calorimetry (DSC) and Fourier transforminfrared spectroscopy (FT-IR). The tested oil was exposed to thermal ageing at temperatures of 110,120 and 130◦C for times ranging from 100 to 2400 h. The intensity of the infrared spectral band of thelow-temperature inhibitor and the temperature of the thermo-oxidative DSC peak were considered forevaluation. The obtained results were correlated with standardized dielectric dissipation factor (tan)measurements. The results indicated that the analysed observables changed continuously during theapplied thermal ageing. The endpoint criteria were subsequently determined and Arrhenius diagramswere constructed. The results demonstrated that the determination of the actual state or the lifetime ofthe transformer oil via DSC or FT-IR may be beneficial in terms of reducing the measurement time, theinfluence of moisture on the measurement results and the oil volume required for the tests. Thus, DSCand FT-IR represent promising alternatives to dissipation factor measurements.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Thermochimica Acta

ISSN

0040-6031

e-ISSN

—

Svazek periodika

647

Číslo periodika v rámci svazku

January 2017

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

86-93

Kód UT WoS článku

000392787500012

EID výsledku v databázi Scopus

2-s2.0-85006289269