The vibration and noise are serious problems for large oil-immersed power transformers, which directly affect the performance and stability of transformers. The no-load current, as the excitation source, is very important for accurate calculation of vibration and noise. This paper provides a novelapproach based on the new field-circuit coupling model to calculate no-load current of large power transformers. For one 110 kV large oil-immersed power transformer, the multi-physics coupling problem including magnetic field, structural force field and acoustic field under alternating magnetic field is analyzed. Following the multi-physics coupling calculation, distributions of vibration and noise are obtained. To validate feasibility and applicability of the proposed method, the actual vibration and noise of transformer are measured experimentally. Finally, the simulation results are compared with experimental ones, which show better goodness of fit.

中文翻译：

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110 kV电力变压器的新型场电路辅助有限元分析，用于噪声控制和减振

振动和噪声是大型油浸式电力变压器的严重问题，直接影响变压器的性能和稳定性。空载电流作为激励源，对于精确计算振动和噪声非常重要。本文提出了一种基于新的场-电路耦合模型的新型方法，用于计算大型电力变压器的空载电流。对于一台110 kV大型油浸式电力变压器，分析了交变磁场下磁场，结构力场和声场的多物理场耦合问题。经过多物理场耦合计算，获得了振动和噪声的分布。为了验证该方法的可行性和适用性，对变压器的实际振动和噪声进行了实验测量。