###### Abstract
Another study proposed the application of an impedance boundary condition to reduce the calculation time of the leakage loss in the transformer tank, and the calculation time was reduced by applying an impedance boundary condition to the outer surface of the transformer tank without considering the skin effect [6]. The losses in the transformer tank were shown for different distances of the outer winding from the tank for finite element method/surface impedance widths [7]. Transformer losses can be calculated using the finite element method, which is the most widely used, and other methods [8]. Various methods have been tried to reduce transformer losses. A study quantitatively analyzed the effects of different shielding configurations on loss reduction [9]. Another study found that placing a stainless-steel plate around the low-voltage conductors in the simulation of a 2000 kVA transformer reduced the magnetic field strength and the ohmic loss in the transformer tank wall [10]. Aluminum screens significantly reduce the overheating of the tank wall caused by the high-current-carrying low-voltage junctions [11]. The effects of different materials used in the manufacture of transformers on losses have also been investigated. The optimization of load losses was achieved by using different magnetic materials in the transformer tank wall [12]. The magnetic flux in the oil tank and windings was significantly reduced by using a shielding device made of different materials [13]. The total loss was reduced by 43.57% when a tank model made of a stainless-steel material instead of a low-carbon-steel material was used [14]. Stray losses in transformer tank walls can be significantly reduced by using aluminum magnetic screens [15]. Magnetic shunts are an effective method to reduce losses in transformer tanks. Studies have investigated the effect of the magnetic shunts used [16]. In one such study, width-optimized electromagnetic shunts were compared with conventional electromagnetic shunts and aluminum shielding, finding that the width-optimized electromagnetic shunts were more effective in preventing leakage currents than the others [17]. Another study stated that the magnetic flux density was mainly concentrated in the magnetic core, the magnetic flux leakage on the tank wall was small, the magnetic fields between the LV and HV windings were stronger than the other parts, the tank losses occurred mainly in the parts near the windings, and the tank losses could be reduced by placing magnetic shunts near the tank [18]. The most important problem in using a magnetic shunt is determining its size, shape, and location. One study examined the effective parameters affecting the design of magnetic shunts to control the leakage flux to reduce the losses and noise generated in transformers with different power and short circuit voltages [19]. Some research on the shapes of magnetic shunts determined that using a U-shaped magnetic shunt on the clamp is a more effective shunting method than using L- and inverted-L-shaped magnetic shunts [20]. By using L- and C-type magnetic shielding on the yoke clamps, a study determined that the effect of L-type magnetic shielding on the eddy current loss reduction in the yoke clamps was greater than when using C-type magnetic shielding [21]. A study in this field expressed the optimum shunt element dimensions in a 1000 kVA transformer depending on the design dimensions of the transformer windings and core [22]. It has been shown that if the shunts are very close to the tank wall, the shunt edges may create strong leakage areas on the tank surface due to their end effects; therefore, these areas can be reduced by flattening the shunt edges [23]. In a study using machine learning methods for the location of magnetic shunts, feed-forward neural networks (FFNNs) and the finite element method (FEM) were used to determine the magnetic shunt location on the tank wall of a transformer and to reduce leakage losses.