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Calculation and Analysis of Additional Loss of HV Converter Transformer
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Author: Ping Zhang, Hongwei Zhang, Ting Li, Yiling Wang
Abstract: With the development of State Grid, It requires better performance of HV converter transformer, calculated accurately the additional loss of HV converter transformer structural components is important subject. Firstly, considering the skin effect in the transformer structural components, author use the impedance boundary condition in the structural components loss calculation, and verify this method through TEAM 21 model; Secondly, aim at the characteristic of high harmonics ,analysis the methods and chose the IEC61378 2 as the harmonic additional loss calculation method; Lastly, a 500Kv high converter transformer model was built and solved ,then structural components loss and short circuit impedance loss and harmonic winding eddy loss was received by second development, compared with experimental value, the errors of measured values and calculated values in 7.0％, which fully demonstrated the validity of the used methods, this transformer model is proposed to reduce the loss, which has important engineering significance for high voltage converter transformer design.
Keywords: Converter Transformer, Impedance Boundary Condition, TEAM 21, 3D Modeling, Harmonic Loss
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