Analyzing And Comparing The Hot-Spot Thermal Models Of Hv/Lv Prefabricated And Outdoor Oil-Immersed Power Transformers

Ali Mamizadeh, Ires Iskender
2012 Zenodo  
The most important parameter in transformers life expectancy is the hot-spot temperature level which accelerates the rate of aging of the insulation. The aim of this paper is to present thermal models for transformers loaded at prefabricated MV/LV transformer substations and outdoor situations. The hot-spot temperature of transformers is studied using their top-oil temperature rise models. The thermal models proposed for hot-spot and top-oil temperatures of different operating situations are
more » ... pared. Since the thermal transfer is different for indoor and outdoor transformers considering their operating conditions, their hot-spot thermal models differ from each other. The proposed thermal models are verified by the results obtained from the experiments carried out on a typical 1600 kVA, 30 /0.4 kV, ONAN transformer for both indoor and outdoor situations.
doi:10.5281/zenodo.1327777 fatcat:hc2ouqfuxbf2xntj63yzuzp5mi