Modelling and experimental verification of barrier effect on breakdown voltage of transformer oil using Box-Behnken Design

Ghoneim, Sherif S. M.; Dessouky, Sobhy S.; Elfaraskoury, Adel A.; Sharaf, Ahmed B. Abou

doi:10.1016/j.measurement.2019.07.057

Cited by 11 publications

(13 citation statements)

References 11 publications

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“…The CCF and BBD are considered the most known DOE methods [34]. BBD is recently viewed in many applications to investigate the effect of the experimental parameters on these experiments' responses, as in [13,31,[35][36][37][38][39][40]. Further, it is lying on the division of applied statistics for analyzing, planning, and interpreting the controlled test for determining the parameters that regulate the reaction of practical experiments.…”

Section: Box-behnken Design (Bbd)mentioning

confidence: 99%

“…In these techniques, a minimum number of experiment runs is required to reduce the experiment cost [30]. A second-order model was constructed using CCF and BBD in [13,31] to inspect the influence of different barrier parameters, such as barrier place in the gap spacing, the gap spacing, and the barrier diameter of point/plane electrode arrangement under AC voltage. The conclusion was that the type of RSM technique affects the constructed model's accuracy and the cost of experimental works [31].…”

Section: Introductionmentioning

confidence: 99%

“…Previous works have studied the effect of some barrier variables on the strength of the insulating oil and its VBD, e.g., the barrier location and its diameter and the gap space between the electrodes [3,9,12,13,31]. In the current work, the effect of some new barrier variables is investigated.…”

Section: Introductionmentioning

confidence: 99%

“…These barrier variables are the barrier location in the gap space (a/d)%, the dielectric constant of barrier material (ε r ), the hole radius in the barrier (hr), the barrier thickness (th), and the inclined angle of the barrier in the gap space (θ). The advantage of using the BBD technique in treating the difficulties of practical limits is avoiding risky mixtures because the sharp edges and star points are evaded [31]. Then, altogether points nominated to build the BBD model lie on the anticipated region (i.e., studied data region).…”

Section: Introductionmentioning

confidence: 99%

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Accurate Insulating Oil Breakdown Voltage Model Associated with Different Barrier Effects

et al. 2021

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In modern power systems, power transformers are considered vital components that can ensure the grid’s continuous operation. In this regard, studying the breakdown in the transformer becomes necessary, especially its insulating system. Hence, in this study, Box–Behnken design (BBD) was used to introduce a prediction model of the breakdown voltage (VBD) for the transformer insulating oil in the presence of different barrier effects for point/plane gap arrangement with alternating current (AC) voltage. Interestingly, the BBD reduces the required number of experiments and their costs to examine the barrier parameter effect on the existing insulating oil VBD. The investigated variables were the barrier location in the gap space (a/d)%, the relative permittivity of the barrier materials (εr), the hole radius in the barrier (hr), the barrier thickness (th), and the barrier inclined angle (θ). Then, only 46 experiment runs are required to build the BBD model for the five barrier variables. The BBD prediction model was verified based on the statistical study and some other experiment runs. Results explained the influence of the inclined angle of the barrier and its thickness on the VBD. The obtained results indicated that the designed BBD model provides less than a 5% residual percentage between the measured and predicted VBD. The findings illustrated the high accuracy and robustness of the proposed insulating oil breakdown voltage predictive model linked with diverse barrier effects.

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Section: Box-behnken Design (Bbd)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Accurate Insulating Oil Breakdown Voltage Model Associated with Different Barrier Effects

et al. 2021

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“…Moreover, BBD allows for the development of mathematical models that facilitate the assessment of the statistical significance of each factor analyzed, as well as their interactions. When interaction effects are detected, the optimal conditions between univariate and multivariate optimization will be different [37,38].…”

Section: Introductionmentioning

confidence: 99%

Optimizing and Comparing Ultrasound- and Microwave-Assisted Extraction Methods Applied to the Extraction of Antioxidant Capsinoids in Peppers

et al. 2019

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Capsinoids are very similar antioxidant compounds to capsaicinoids, but less irritating, non-pungent and more palatable, and can thus be used in greater concentrations for food applications. To date, three capsinoids (capsiate, dihydrocapsiate, and nordihydrocapsiate) have been isolated from the pepper fruits. Due to its substantial commercial importance, it would be convenient to determine which pepper varieties have a richer content. Ultrasound- (UAE) and microwave- (MAE) assisted extraction have been implemented and analyzed using multivariate statistical methods. Firstly, different solvents were tested individually. The three best solvents were used in a set mixture design, where 42% methanol and 58% ethyl acetate were determined as the optimum combination for UAE, and 100% methanol for MAE. Subsequently, a Box–Behnken experimental design with four variables for both UAE and MAE (time, temperature, pH and sample mass:solvent volume “ratio”) was performed. The sample mass:solvent volume was the most influential variable in UAE; while for MAE no variable was any more influential than the others. Finally, both optimized extraction methods were successfully applied to different varieties of peppers. Besides, to demonstrate the efficiency of both extraction methods, a recovery study was performed. The results prove the potential of both techniques as highly adequate methods for the extraction of capsinoids from peppers.

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Theoretical models to evaluate the effect of SiO2 and CaO contents on the long-term compressive strength of cement mortar modified with cement kiln dust (CKD)

Abdalla

Mohammed

2022

Archiv.Civ.Mech.Eng

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Modelling and experimental verification of barrier effect on breakdown voltage of transformer oil using Box-Behnken Design

Cited by 11 publications

References 11 publications

Accurate Insulating Oil Breakdown Voltage Model Associated with Different Barrier Effects

Accurate Insulating Oil Breakdown Voltage Model Associated with Different Barrier Effects

Optimizing and Comparing Ultrasound- and Microwave-Assisted Extraction Methods Applied to the Extraction of Antioxidant Capsinoids in Peppers

Theoretical models to evaluate the effect of SiO2 and CaO contents on the long-term compressive strength of cement mortar modified with cement kiln dust (CKD)

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