超高压变压器三维漏磁场计算与分析

With the expansion of extra-high voltage, transformer has the trend of the development of high voltage and high-capacity, and uses more autotransformer in order to reduce costs. Autotransformer compared with ordinary transformer, The primary side and the secondary side of the autotransformer not only has the coupling of the magnetic field, but also has the contact of the circuit. It is very important and significant to study on the leakage magnetic field, structural parts loss distribution of UHV autotransformer. Therefore, the electromagnetic problem of EHV autotransformers is studied based on the field-circuit coupled finite element (FE) method，and an ODFS-334MVA/500kV EHV autotransformer is taken as the example.The leakage magnetic field distribution is solved under the second side short-circuited condition. Furthermore, the effect of the pull plate with slotted, and material selection of plate of pressuring nail on the leakage magnetic field distribution are investigated in this thesis.