NDLI: Stability of mineral oil and oil–ester mixtures under thermal ageing and electrical discharges

Content Provider	IET Digital Library
Author	Hamdi, Ahmed Fofana, Issouf Djillali, Mahi
Abstract	This study summarises the results of an experimental investigation on the stability of mineral-based oil mixtures when they are confronted with different ratios of synthetic ester under conditions of electrical discharge, electrical breakdown and a combination of both. The condition of the oil samples was assessed using diagnostic techniques such as gassing tendency, turbidity, dissolved decay products (DDP) and dielectric dissipation factor (DDF), according to ASTM standards. A comparison is made between the performances of fresh and aged samples. The results provide experimental evidence that the chemical composition of hydrocarbon blend is contributing factors to oil gassing. It was observed that aged oils release more gases than new one. It was also observed that the gassing tendency increased with increasing amount of ester for the mixed fluids. The pressure and the absorbance of gases vary proportionally with ester content. Under thermal stress, an increase in pressure is observed especially for the mineral oil sample. The turbidity, DDP and DDF measurements revealed higher values for mineral oil. Importantly, the stability improved with increasing ester content in the blends. Mixed mineral oil/ester therefore offers many advantages with concomitant cost reductions compared with pure synthetic esters.
Starting Page	2384
Ending Page	2392
Page Count	9
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 9, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.1970
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-04-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Ageing ASTM Standards Cost Reduction Dielectric Dissipation Factor Discharges (electric) Dissolved Decay Products Electrical Discharges Hydrocarbon Blend Insulating Oils Mineral Oil Stability Mineral-based Oil Mixtures Mixtures Oil Gassing Oil–ester Mixtures Organic Insulation Standards Synthetic Esters Thermal Ageing Turbidity
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Influence of ageing on oil degradation and gassing tendency under high-energy electrical discharge faults for mineral oil and synthetic ester

Understanding the ageing behaviour of transformer oil–paper insulation with ester and mixed dielectric fluids

Electrical and thermal properties of insulating oil-based nanofluids: a comprehensive overview

Comparative study of the thermal degradation of synthetic and natural esters and mineral oil: effect of oil type in the thermal degradation of insulating kraft paper

Comparative PD pulse burst characteristics of transformer type natural and synthetic ester fluids and mineral oils

Stray gassing cases of insulating liquids in HV equipment

Experimental investigations on insulating liquids for power transformers: Mineral, ester, and silicone oils

Physiometric and Fourier transform infrared spectroscopy analysis of cellulose insulation in blend of mineral and synthetic ester oils for transformers

Dielectric characterisation of Fe3P nanoparticles based ester oil

Stability of mineral oil and oil–ester mixtures under thermal ageing and electrical discharges

Similar Documents

Influence of ageing on oil degradation and gassing tendency under high-energy electrical discharge faults for mineral oil and synthetic ester

Understanding the ageing behaviour of transformer oil–paper insulation with ester and mixed dielectric fluids

Electrical and thermal properties of insulating oil-based nanofluids: a comprehensive overview

Comparative study of the thermal degradation of synthetic and natural esters and mineral oil: effect of oil type in the thermal degradation of insulating kraft paper

Comparative PD pulse burst characteristics of transformer type natural and synthetic ester fluids and mineral oils

Stray gassing cases of insulating liquids in HV equipment

Experimental investigations on insulating liquids for power transformers: Mineral, ester, and silicone oils

Physiometric and Fourier transform infrared spectroscopy analysis of cellulose insulation in blend of mineral and synthetic ester oils for transformers

Dielectric characterisation of Fe3P nanoparticles based ester oil

Stability of mineral oil and oil–ester mixtures under thermal ageing and electrical discharges