【摘要】 变压器长期工作在异常工况下,会导致其机械结构发生损坏,影响安全生产。干式变压器无法设置瓦斯保护,因而通过振动信息监测变压器运行状态是一种可取的方法。本文建立干式变压器的电-磁-机耦合模型,利用Ansys Workbench仿真软件对SCB型干式变压器在二次绕组发生短路及存在直流偏磁工况下的振动情况进行仿真;通过有限元分析,提取不同工况下变压器的振动特征,为变压器的故障诊断和运行寿命分析提供依据。更多还原

【Abstract】 If a transformer works under abnormal conditions for a long time, its mechanical structure could be damaged so as to affect safety production. Dry-type transformers cannot be equipped with gas protection, so feedback of the operating status of the transformer through vibration information is a desirable method. The electric-magnetic-mechanical coupling model of the dry-type transformer is first established in this paper. And the simulation software of Ansys Workbench is used to simulate the vibration of the SCB dry-type transformer in the cases of a short circuit in the secondary winding and the presence of DC bias. Through finite element analysis, the vibration characteristics of the transformer under different working conditions are extracted, which provides a basis for the fault diagnosis and operating life analysis of the transformer.更多还原