On the Trend of Improvement of Thermal Model for Calculating the TOT and HST

• Autorzy: Askari M. T. , Kadir M. Z. A. A. , Izadi M.

Warianty tytułu

PL

Modyfikacje i ulepszenia modelu termicznego transformatora na potrzeby obliczeń parametrów TOT i HST

• Języki publikacji: EN

Abstrakty

EN

As the transformers are one of the expensive equipment of power systems optimum loading is notified by designers, nowadays loading was done base on the IEC and IEEE standards according to the hot spot temperature (HST) as an effective criteria on loading and overloading. To predict HST and TOT, many principal models have been proposed such as classic thermal, alternative thermal and dynamic thermal models. In this paper attempts have been made to introduce reliable and acceptable thermal models, and explain the procedure of calculating the top oil temperature and hot spot temperature as two criteria to evaluate the load ability and the insulation life of transformer. Eventually, different types of thermal models are compared with each other on a 30-MVA oil-natural air-forced transformer.

PL

W artykule zaproponowano sposób tworzenia modelu termicznego transformatora, oraz opisano procedurę obliczania maksymalnej temperatury oleju i uzwojeń. Te dwie wartości zdefiniowano jako parametry określające dopuszczalną obciążalność i żywotność izolacji transformatora. Dokonano porównania różnych modeli termicznych, stworzonych na podstawie 30 MVA transformatora z olejem naturalnym i wymuszonym obiegiem powietrza.

Słowa kluczowe

EN

oil-immersed transformer; ambient temperature; HST; thermal model

PL

transformator olejowy; HST; model termiczny

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2012
• Tom: R. 88, nr 12a
• Strony: 297--301
• Opis fizyczny: Bibliogr. 51 poz., rys., tab.

Twórcy

autor

Askari M. T.

autor

Kadir M. Z. A. A.

autor

Izadi M.

• Department of Electrical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran,

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