Prediction of hottest spot temperature in power transformer windings with non-directed and directed oil-forced cooling

Numerical analysis of the hot-spot temperature of a power transformer with alternative dielectric liquids

“…In 2008, Hosseini et al [13] performed a simulation of an oil directed high voltage winding of a power transformer immersed in mineral oil and the influence of the design parameters in the hot-spot temperature value and location. Later in 2009, Taghikhani et al [14] employed a 2D heat transfer model of a power transformer to predict hot-spot value and location including the influence of Directed Oil Flow (DOF) and Non-Directed Oil Flow (NDOF) configurations. In 2010, Sorgic and Radakovic [15] carried out a 2D simulation of a mineral oil immersed transformer in order to compare the cooling system with Oil Forced and Oil Directed configuration.…”

Current distribution in the low-voltage winding of the furnace transformer

“…And as such can be used for calculating the current distribution in regulating winding of the double-stacked transformer and other various type of power rectifier transformer [12]. Also the method can be efficiently used in designing the winding cooling system to prevent local overheating [15,16]. To achieve this target, it is important that the current is correctly distributed in the power transformer.…”

A New Prediction Model for Transformer Winding Hotspot Temperature Fluctuation Based on Fuzzy Information Granulation and an Optimized Wavelet Neural Network

“…The main reason for the ending of its service life is the loss of proper insulating capacity. The transformer winding hotspot temperature (TWHT), which is defined as the temperature of the hottest region of the transformer winding, is one of the important factors that affects its insulating capacity [1][2][3][4]. TWHT that exceeds the allowable value will lead to damage of the transformer insulation.…”