Corrosive Sulphur effect in power and distribution transformers failures and treatments

Velásquez, Ricardo Manuel Arias; Lara, Jennifer Vanessa Mejía

doi:10.1016/j.engfailanal.2018.05.018

Cited by 40 publications

(12 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Distribution transformers are designed for paramount efficiency at a 60-70% load and do not normally operate at full load every time [26]. The load of the distribution transformer rests on distribution demand.…”

Section: Section Life Accession Of Distribution Transformermentioning

confidence: 99%

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

Soni¹,

Chakrabarti²,

Leonowicz

et al. 2021

IEEE Access

View full text Add to dashboard Cite

Distribution transformer is the most vital component in the power system. Failure of a transformer leads to loss of revenue besides affecting the reliability of power supply to consumers. It can lead to the non-availability of the transformer for a long duration. Due to this, it is important to maintain the good quality of mineral oil. Thus, if the quality of the mineral oil is reduced then its dielectric strength/quality is degraded. Finally, it can affect the services of the transformer, in terms of continuity of power supply. This paper entails the development of a mathematical MATLAB/Simulink model which able to calculate the life cycle of distribution transformer and exact oil changing frequency. With the help of proposed Matlab/Simulink models, the plot curves between furan content formation versus time, pollution index versus time, and dielectric strength of oil versus time are also prepared. The article methodology uses the newly proposed equations, that are in accordance with IEEE standards: IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators (IEEE Std. C57.91-2011) and IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use (IEEE Std C57.637-2015). Then the case study for a 100 kVA distribution transformer is realized. So, with the input values in the Simulink model of load current of the transformer, dielectric constant of oil and flash point of oil we can estimate the life of the distribution transformer. Harmonic load factor in our research work is not included, in order to reduce influence of harmonic load we need to installed the active filter, which is not covered in this paper.

show abstract

Section: Section Life Accession Of Distribution Transformermentioning

confidence: 99%

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

Soni¹,

Chakrabarti²,

Leonowicz

et al. 2021

IEEE Access

View full text Add to dashboard Cite

show abstract

“…However, the refined oil is not pure, because there are still trace impurities in it, which are considered as a big threat to the safe operation of the transformer, and corrosive sulphur is one of these impurities. On the other hand, some sulphur compounds are added to improve the oxidation stability of the transformer oil as antioxidants [20–22].…”

Section: Presence Of Sulphur In Mineral Oil and Its Detectionmentioning

confidence: 99%

“…Researchers believe that dibenzyl disulfide (DBDS) is the main reason for sulphur corrosion, which is considered relatively stable and is added into oil as an antioxidant [22]; most of the research studies on corrosive sulphur in oil are carried out around DBDS [10, 24, 26–29]. Figure 1 portrays the chemical structure of DBDS.…”

Section: Presence Of Sulphur In Mineral Oil and Its Detectionmentioning

confidence: 99%

“…DBDS concentration can be reduced to be less than 5 ppm and the performance of the regenerated oil can be recovered. However, the “fuller's Earth” will be saturated after adsorption; as a consequence, it must undergo a reactivation process at regular intervals [22]. Research studies suggest that the cheap bentonites and stable Ag/γ‐Al 2 O 3 can also be employed as adsorbents [99, 100].…”

Section: Hazards Of Sulphur Corrosionmentioning

confidence: 99%

“…There are also some standards of testing various ranges of sulphur compounds, as shown in Table 4 [22, 23].…”

Section: Presence Of Sulphur In Mineral Oil and Its Detectionmentioning

confidence: 99%

See 2 more Smart Citations

A review: Research on corrosive sulphur in electrical power equipment

et al. 2021

View full text Add to dashboard Cite

Corrosive sulphur has been commonly regarded as an enormous threat to electrical power equipment in recent decades. Cuprous sulphide (Cu 2 S) deposition on the insulating oil and paper insulation caused by sulphur corrosion will bring about insulation deteriorations or failures in power transformers and shunt reactors. A large number of experiments have been carried out to investigate sulphur corrosion and some measures have been come up to solve this issue such as replacement of insulating oil, chemical removal of corrosive sulphur and the addition of passivator and so on. However, there has not been a perfect method to work out this problem completely, and the phenomenon of sulphur corrosion still occurs. This paper intends to provide thorough information of corrosive sulphur in power equipment and give detailed explanations about its corrosion mechanism, hazards and control measures, which is supposed to offer a reference for subsequent researchers.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Magnetically controlled reactors design for weak grids

Velásquez

Lara

2021

Ain Shams Engineering Journal

View full text Add to dashboard Cite

Corrosive Sulphur effect in power and distribution transformers failures and treatments

Cited by 40 publications

References 17 publications

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

A review: Research on corrosive sulphur in electrical power equipment

Magnetically controlled reactors design for weak grids

Contact Info

Product

Resources

About