Advanced Thermal Modeling and Experimental Performance of Oil Distribution Transformers

Rosillo, M. E.; Herrera, Carlos A.; Jaramillo, G.A.

doi:10.1109/tpwrd.2012.2205020

Cited by 42 publications

(16 citation statements)

References 10 publications

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“…Consideration of axisymmetric geometry in the disc-type winding is essential for reliable prediction of the flow rate distribution in the cooling ducts. However, the inconsistency between the flow rate distribution obtained from an FEM-based numerical model and a network model, both employing axisymmetric analysis, is still not negligible [16,23]. This could be because the changes in the width of inlet and outlet vertical duct influences the flow rate distribution, and consequently, may play a major role in influencing the 'hot-spot'.…”

Section: Parametric Study Using 3d Modelmentioning

confidence: 99%

“…Tenyenhuis et al, [15] presented a method based on finite element method (FEM) to determine and analyse the temperature distribution, and thereby obtained the location and temperature of the 'hot-spot' in the transformer. In another work, to analyse the thermal behaviour of ONAN distribution transformer, Rosillo et al [16] developed a numerical model based on FEM. Their model considered all the modes of heat transfer, and the predicted flow rate along with temperature distributions were experimentally validated as per IEEE-1995 loading guide.…”

Section: Introductionmentioning

confidence: 99%

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Finite element method‐based modelling of flow rate and temperature distribution in an oil‐filled disc‐type winding transformer using COMSOL multiphysics

Das

Chatterjee

2017

IET Electric Power Applications

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Thermal design of oil filled distribution and power transformers is essential for obtaining the location of 'hot-spot' of the transformers. This study presents the analysis of 2D and 3D model for the simplified section of an oilfilled disc-type winding power transformer. Both models developed using COMSOL Multiphysics 5.1 were validated with the experimental and numerical results available in literatures. The analysis of the flow rate and the temperature distribution accurately reveals the location and the temperature of the 'hot-spot'. Further, the parametric study using the 3D model shows that the combined effect of variation in the vertical cooling duct width and the local cross-section area in the horizontal cooling duct has a significant influence on the location of the 'hot-spot' and a minor influence on its temperature (i.e. ±3%). The analysis results in this study shall be beneficial from the point of view of design development in transformers.

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Section: Parametric Study Using 3d Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite element method‐based modelling of flow rate and temperature distribution in an oil‐filled disc‐type winding transformer using COMSOL multiphysics

Das

Chatterjee

2017

IET Electric Power Applications

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“…More recently, in 2012, the same authors carried out a comparison between 2D and 3D models of the same geometry, thus determining the existence of threedimensional fluid flow phenomena that cannot be obviated such as it occurs in the 2D-model [5]. Again, in the same year, a 3-D model of a 15-kVA ONAN transformer was carried out by Rosillo et al in which oil velocity profile and oil and winding temperature distribution were calculated and experimentally validated in accordance with the IEEE-1995 Loading Guide [6]. Recently, in 2015, Lecuna et.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the cooling capacity of several alternative liquids in zig-zag cooling system of a power transformer

Santisteban¹,

Delgado²,

Ortiz³

et al. 2024

RE&PQJ

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Mineral oil is the usual coolant of the power Transformers. Nonetheless, the high risk of fire of this liquid due to its low ignition point and its scarce biodegradability has promoted the development of dielectrics alternative fluids with better physical-chemical properties. However, these new liquids have to be as good coolants as mineral oil in order to maintain the power transformer performance. This numerical study analyzes the coolant capacity of some of these new commercial liquids (a natural ester, a synthetic ester, and a silicone oil) by using the zigzag cooling system of the low voltage winding of a real power transformer. Two types of thermal-fluid studies (parametric and time-dependent studies) have been made by using a 3D model of this system. The comparison of temperatures obtained from the parametric study (different inlet flow rates) allow us to say that the worst coolant is the silicone oil. Also, it can be say that a significant increase in the inlet flow rate produces mild drops of hot-spots temperatures and no modification in the initial temperature distribution. For the timedependent study (25% of overload during 1 hour), the hot-spot temperature exceed the limits, which negatively affects the aging speed of the insulating paper and therefore the transformer lifetime.

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“…Prasad [1] [2].Thermal modeling of natural convection cooled oil immersed distribution transformer is carried out by Robert Michael Marko [3]. Transformer cooling system improvement has been extensively studied through analytical or advanced numerical techniques by Miguel E. Rosillo [5]. Eleftherios I. Amoiralis and Stefan D.L.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Optimization of Cooling Tubes of Transformer for Efficient Heat Transfer

Vincent¹,

Bharathi²

2017

IJAEMS

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Advanced Thermal Modeling and Experimental Performance of Oil Distribution Transformers

Cited by 42 publications

References 10 publications

Finite element method‐based modelling of flow rate and temperature distribution in an oil‐filled disc‐type winding transformer using COMSOL multiphysics

Finite element method‐based modelling of flow rate and temperature distribution in an oil‐filled disc‐type winding transformer using COMSOL multiphysics

Numerical study of the cooling capacity of several alternative liquids in zig-zag cooling system of a power transformer

Simulation and Optimization of Cooling Tubes of Transformer for Efficient Heat Transfer

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