Study of technologies implemented in the operation of SF6 switches

Díaz, Sergio; Álvarez, José R.; Berdugo, Kelly; Gómez, Kevin

doi:10.1088/1757-899x/872/1/012041

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…The aging or degradation of the oil used as insulation and cooling medium in transformers is mainly due to changes in the molecular structure of the dielectric. These changes are related to the decomposition of the insulation properties of power cables [40]- [42]. In this context, current diagnostic methods must develop intelligent techniques in the incipient detection of degradation of insulating materials in power transformers.…”

Section: Analysis Of the Resultsmentioning

confidence: 99%

A Proposal for the Diagnosis of Incipient Faults in Power Transformers Using Fuzzy Logic Techniques

Fernández¹,

Corrales-Barrios

Benítez-Pina

et al. 2022

IREE

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The availability of power transformers is essential for the safety and continuity of electrical service. Today's fault diagnosis methods use intelligent techniques such as neural networks, support machines, hybrid techniques, among others. Although they present good results, these techniques find restrictions in the ability to determine the precise moment in the event of multiple and small-magnitude faults. The proposal includes a new algorithm based on fuzzy rules that incorporates the daily increase of dissolved gases in the transformer oil that improves the classification of incipient faults. With reliable samples of gas dissolved in oil, the method proposed in the research can obtain a total precision rate of 91.4%. In contrast, this degree of precision is lower in other conventional methods reported in the bibliography. In addition, its performance in the classification of multiple failures is 97.5%. The method uses fuzzy logic tools to suggest actions aimed at preventive maintenance by monitoring the total of combustible gases dissolved in the oil. The proposal is a simple and easy solution to implement in practice that allows determining the status of the transformer in service without affecting the continuity of the electricity supply.

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Section: Analysis Of the Resultsmentioning

confidence: 99%

A Proposal for the Diagnosis of Incipient Faults in Power Transformers Using Fuzzy Logic Techniques

Fernández¹,

Corrales-Barrios

Benítez-Pina

et al. 2022

IREE

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“…A study of the RSM and the Angle method [27], [28] to design protection systems against the direct incidence of atmospheric discharges on structures. This study shows, through mathematical modeling, that both methods are closely linked and that they can be used safely in the dimensioning of protection systems since they comply with the technical requirements demanded by the standards [29]- [33].…”

Section: Methodsmentioning

confidence: 99%

Lightning rod system: mathematical analysis using the rolling sphere method

Martínez¹,

Angarita

Álvarez

et al. 2022

IJPEDS

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In electrical protection, there is a method of electrical protection of buildings against atmospheric discharges called the electro-geometric method or the rolling sphere method. So far, it is possible to achieve the implementation of this method graphically, that is, representing through plans and technical drawings, the protection conditions of the analyzed structure and obtaining from these graphic representations the protection parameters with the consequent errors caused by the scales and dimensions of the work plane. In the present work, a mathematical model is obtained that allows, using specific calculations, to analyze the dynamic behavior of a protection system against atmospheric discharges without worrying about the limitations given by the scales and planes. The set of equations obtained in the model allows us to determine the different parameters that define the protection system against atmospheric discharges (lightning) without depending on the graphical representation of the system's topology.

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“…The ODP for G 3 gas is equal to zero but for SF6 gas equal to 0.08 which means that using the proposed gas could lead to more enhancement for ODP [12]. From 1994 to 2016 as shown in Figure 2 the concentration of SF6 gas in the atmosphere where shown that during the last five years the concentration of SF6 gas was increased by 20% [13], [14]. So, the potential alternative gas should be worked in all industrial works to reduce the main effect of this gas (greenhouse effect) which is one of the important recommendations of the Kyoto protocol that needed to be achieved [15].…”

Section: Introductionmentioning

confidence: 94%

Modelling G3 gas as an alternative gas for SF6 using COMSOL multiphysics

El-Zein

Ibrahim

2022

IJPEDS

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Sulfur hexafluoride (SF6) gas is the most often gas used in high voltage systems as insulating medium and arc quenching because it has many advantages such as high dielectric strength, low boiling point, low toxicity, and stability for a long period. The 1997 Kyoto protocol recommended the elimination of SF6 gas, because its impact on the atmosphere has global warming potential (GWP) equal to 23,500 and an ozone depletion potential (ODP) equal to 0.08. Kyoto protocol recommended alternatives gases for SF6 gas such as CF3CHCL2, and others. In this paper a new gas called a HeptaFluoro-iso-Butyronitrile+CO2 ([(CF3)2CFCN+CO2]) which is known commercially as green global gas (G3) The dielectric strength for the proposed gas is approximately equal to SF6 gas and excellent arc quenching and achieve Kyoto protocol recommendations about using alternative gases with 98% less impact on GWP than SF6 gas also G3 gas maintain the same dimension and overall footprint which is an important economical factor for utilities. The total bond energy analysis of SF6 and G3 gases has been studied. COMSOL multiphysics was used to simulate the SF6 and G3 gases to show the ability of the G3 gas when working in geographic information system (GIS) equipment.

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Study of technologies implemented in the operation of SF6 switches

Cited by 6 publications

References 9 publications

A Proposal for the Diagnosis of Incipient Faults in Power Transformers Using Fuzzy Logic Techniques

A Proposal for the Diagnosis of Incipient Faults in Power Transformers Using Fuzzy Logic Techniques

Lightning rod system: mathematical analysis using the rolling sphere method

Modelling G3 gas as an alternative gas for SF6 using COMSOL multiphysics

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