A simplified transformer thermal model based on thermal-electric analogy

Tang, Wenhu; Wu, Q. H.; Richardson, Zoe

doi:10.1109/tpwrd.2003.822968

Cited by 114 publications

(59 citation statements)

References 4 publications

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“…This model focuses on the nonlinear thermal resistances and has been developed to estimate the hot-spot temperature [6][7][8]. D. Susan improved the thermal circuit model by taking oil viscosity changes and temperature loss variations into account [8].…”

Section: Mathematical Model Of Thermal Circuitmentioning

confidence: 99%

“…Hence, it is important to evaluate the winding hot-spot temperature accurately so that transformers can operate safely and economically. The researches of the winding hot-spot temperature evaluation have been taken for many years and a number of methods and models have been proposed [5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…However, it isn't suitable for hot-spot temperature predicting and the optical fiber's service life is shorter than the transformers'. The thermal model based on the heating equations and thermal circuits has a better transient accuracy so that it is widely adopted [1] [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Thermal circuit model parameters identification of oil-immersed transformer based on PSO algorithm

Linli¹,

Liu²,

Jiang³

et al. 2015

Proceedings of the 4th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering 2015

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Abstract. The thermal circuit model of oil-immersed transformer needs to improve its accuracy in predicting the winding hottest-spot temperature, especially in the case of overload and different cooling modes. In the case of overload condition, the estimate values obtained from most existing models are smaller than the actual measurement values, which increase the potential of transformer overheating fault because of the estimate shortage. These limitations are mainly due to the thermal circuit parameters which are deviating when overloaded or having different cooling modes. In order to overcome these limitations, a parameter identification and correction approach based on PSO algorithm is proposed. The approach works on daily load pattern, permits better accuracy and improves the estimation security margin of thermal circuit in the presence of overload condition and different cooling modes.

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Section: Mathematical Model Of Thermal Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal circuit model parameters identification of oil-immersed transformer based on PSO algorithm

Linli¹,

Liu²,

Jiang³

et al. 2015

Proceedings of the 4th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering 2015

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show abstract

“…El objetivo es utilizar las ecuaciones que están documentadas en las normas, y trasladarlas a un algoritmo matemático que abarca un software, para poder ingresar los datos obtenidos de la placa de características, es decir con estos datos se puede determinar el nivel óptimo de cargabilidad para el transformador, para que con los resultados obtenidos se pueda realizar un análisis técnico-económico y bajo parámetros técnicos se pueda realizar una proyección del estado de la vida útil del transformador [12] [13].…”

Section: Estructura Del Modelo Computacionalunclassified

Modelo computacional para determinar el nivel óptimo de cargabilidad de los transformadores de potencia del sistema nacional interconectado

Rodríguez

Orejuela

2013

ings

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En este documento se indica el proceso de desarrollo e implementación de un modelo computacional para determinar el nivel óptimo de cargabilidad de los transformadores de potencia del Sistema Nacional Interconectado del Ecuador. Gracias a las herramientas de las plataformas de software que permiten construir modelos matemáticos para hacer predicciones y optimizar el comportamiento de sistemas complejos, es posible desarrollar un modelo computacional que abarque todos los aspectos técnicos indicados y documentados en la normativa ANSI e IEC, para determinar los parámetros que inciden en la cargabilidad de los transformadores de potencia y las repercusiones que esto tiene en la vida útil de los transformadores. Bajo estos parámetros el modelo computacional, determina una solución; tanto desde el punto de vista técnico, como del económico; ya que al desarrollar este modelo en base a la formulación técnica–económica; se determina la cargabilidad óptima de los transformadores; y se establece una proyección de la vida útil del transformador de potencia dentro de la red de suministro eléctrico.

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“…In some previous efforts, the focus was on thermal design and methods to predict hot-spot and top-oil temperature [1,2]. Conventional calculations of internal transformer temperature are not only complicated and difficult, but also lead to conservative estimates obtained on the basis operating condition assumptions [3,4]. With computational numerical techniques, it is possible to calculate transformer losses and temperature distributions in power transformers and cooling systems [5,6].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation to study effect of radiation on thermal performance of radiator for onan cooling configuration of transformer

Chandak¹,

Paramane²,

Veken³

et al. 2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In the present work, flow and temperature distribution in the radiator fins of a power transformer is studied numerically with conjugate heat transfer using commercial CFD software to study the effect of radiation on heat dissipation. The approach considered here is a complete 3D geometry of the radiator fins with average height of the flute geometry of the fins for meshing and computational time reduction. Simulations are performed for ONAN (Oil Natural Air Natural) case for one radiator configuration. The simulations also study the effect of radiation and its impact on the overall heat dissipation. These results would give a holistic picture of heat transfer phenomenon to the designers.Transformers are one of the primary components for the transmission and distribution of electrical energy. They are extensively used in electric power systems to transfer power by electromagnetic induction between circuits at the same frequency, usually with changed values of voltage and current. The energy losses in the power transformers are proportional to the load. These losses are transformed into heat and consequently temperature of the cooling medium rises and must be cooled.

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A simplified transformer thermal model based on thermal-electric analogy

Cited by 114 publications

References 4 publications

Thermal circuit model parameters identification of oil-immersed transformer based on PSO algorithm

Thermal circuit model parameters identification of oil-immersed transformer based on PSO algorithm

Modelo computacional para determinar el nivel óptimo de cargabilidad de los transformadores de potencia del sistema nacional interconectado

Numerical investigation to study effect of radiation on thermal performance of radiator for onan cooling configuration of transformer

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