Aged oils reclamation: Facts and arguments based on laboratory studies

N’cho, Janvier Sylvestre; Fofana, I.; Béroual, Abderrahmane; Aka-Ngnui, T.; Sabau, J.

doi:10.1109/tdei.2012.6311504

Cited by 49 publications

(22 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It can be observed that the the colour of the used oil (WCO) sample is dark yellow, which signifies that the sample experiences a change in its properties as a result of frying foods at high temperatures and the sample is contaminated with impurities from the frying process. It can be expected that the colour of the WCO will further darken over time as the oil deteriorates [13] It is evident that the reclamation process using Fuller's Earth adsorbent affects the physical appearance of the WCO sample since the reclaimed oil (RWCO) sample has a light yellow colour. This colour change is a clear indication that most of the contaminants present in the WCO sample have been removed successfully by the adsorbent.…”

Section: Results and Analysismentioning

confidence: 99%

Exploration of the Potential of Reclaimed Waste Cooking Oil for Oil-Immersed Power Transformers

Chairul¹,

Ghani²,

Zainuddin³

et al. 2017

TELKOMNIKA

View full text Add to dashboard Cite

show abstract

Section: Results and Analysismentioning

confidence: 99%

Exploration of the Potential of Reclaimed Waste Cooking Oil for Oil-Immersed Power Transformers

Chairul¹,

Ghani²,

Zainuddin³

et al. 2017

TELKOMNIKA

View full text Add to dashboard Cite

show abstract

“…Contaminants such as residues from refinery, pollution and particularly aging/oxidation products enable the oil to conduct ionic current. Oil oxidation/degradation by-products is subdivided into soluble (dissolved) and insoluble (suspended) products [104]: ‚ the suspended impurity particles include asphaltic sludge, soap sludge, carbon sludge, etc.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)-based Determimentioning

confidence: 99%

Review of Physicochemical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

et al. 2016

View full text Add to dashboard Cite

Abstract:A power transformer outage has a dramatic financial consequence not only for electric power systems utilities but also for interconnected customers. The service reliability of this important asset largely depends upon the condition of the oil-paper insulation. Therefore, by keeping the qualities of oil-paper insulation system in pristine condition, the maintenance planners can reduce the decline rate of internal faults. Accurate diagnostic methods for analyzing the condition of transformers are therefore essential. Currently, there are various electrical and physicochemical diagnostic techniques available for insulation condition monitoring of power transformers. This paper is aimed at the description, analysis and interpretation of modern physicochemical diagnostics techniques for assessing insulation condition in aged transformers. Since fields and laboratory experiences have shown that transformer oil contains about 70% of diagnostic information, the physicochemical analyses of oil samples can therefore be extremely useful in monitoring the condition of power transformers.

show abstract

“…Thus, it is imperative that these ageing by-products are identified and removed from the system at an appropriate stage in order to slow down the ageing process. This is mainly achieved through oil regeneration, a process which removes the ageing by-products through physical and/or chemical processes [2][3][4]. Factors such as the duration of the maintenance, on-line and off-line preferences, effectiveness, investment and operating costs all have to be considered when selecting an oil regeneration technique.…”

Section: Introductionmentioning

confidence: 99%

“…Lack of mineral oil resources in some countries and degradation of available oil leading to sludge formation in transformers were the main driving forces to consider oil reconditioning/regeneration [9]. For over a century various laboratory-based and field studies/trials have been conducted on the advantages and possible improvements of oil regeneration techniques [2][3][4]7,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

et al. 2019

View full text Add to dashboard Cite

Managing a large fleet of ageing assets has become a technical challenge faced by many electricity utilities in developed countries. Asset managers are increasingly interested in techniques that can help extend the useful lifetime of a transformer. Oil regeneration is one of such techniques. In this paper, oil regeneration experiments were performed on a 6.4/0.4 kV retired distribution transformer to investigate the effect of oil regeneration on improving paper conditions. Oil regeneration was conducted in two stages, with the first stage aimed at ‘cleaning the oil’ and the second stage targeted at ‘cleaning the paper’. Oil samples were collected at regular intervals throughout the process and paper samples were obtained from the transformer before and after each oil regeneration stage. It was found that oil regeneration restores oil parameters, including moisture and acidity, similar to those of new oils at the end of stage 1. Analysis of paper samples indicated a reduction in paper moisture at the end of stage 2 by nearly 40%, while low molecular weight acids (LMA) in paper exhibited a reduction by around 30% on average. It is found that the extended oil regeneration period, i.e., stage 2, is necessary to improve the paper condition and hence to reduce the paper ageing rate.

show abstract

Aged oils reclamation: Facts and arguments based on laboratory studies

Cited by 49 publications

References 2 publications

Exploration of the Potential of Reclaimed Waste Cooking Oil for Oil-Immersed Power Transformers

Exploration of the Potential of Reclaimed Waste Cooking Oil for Oil-Immersed Power Transformers

Review of Physicochemical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

Contact Info

Product

Resources

About