Numerical simulation and parameter identification of the temperature field in the oil-immersed self cooled three phrase transformer

In view of the non-steady of temperature field in the large oil-immersed self-cooled three-phrase transformer, this paper constructs parameter identification model and make the numerical simulation. Due to the nonsmooth property of the temperature field of the transformer, the overlapping domain decomposition method is employed to make the coil under the cylindrical coordinate, and the core limb, the yoke and the oil out of the coil under the rectangular coordinate. The interface conditions among subdomains are given. Finally the optimal algorithm is proposed to solve the parameter identification problem and the corresponding software is made. The comparison of experimental data and numerical results shows the correctness and efficiency of our methods.