非晶合金干式变压器温升异常监测方法研究

Study on Monitoring Method of Temperature Rise Anomaly of Amorphous Alloy Dry Transformer

温度损耗量的持续增加使得变压器温升异常成为无法忽视的问题。基于此,为准确掌握变压结构体温度场的实际变化情况,提出并设计了适用于非晶合金干式变压器的温升异常监测方法。从热源条件入手,分别确定变压器结构体的导热系数与三维温度场强度,完成对非晶合金干式变压器温度场的分析。在此基础上,计算变压器在高频状态下的温升漏感规律,联立磁芯损耗、绕组损耗两项物理参量,实现对非晶合金干式变压器异常温升的实时监测。仿真试验结果表明,应用该监测方法后,随着温度损耗数值总量的提升,变压器的温度场始终处在可控范围内,实际电子冲击负荷量也开始出现稳定的数值区间。证明应用该方法后,变压结构体的连续性温升问题得到有效解决。

The continuous increase of temperature loss makes the abnoral temperature rise of transformer become a problem that cannot be ignored.Based on this, in order to accurately grasp the actual change of temperature field of transformer structure, a temperature rise anomaly monitoring method suitable for amorphous alloy dry transformer is proposed and designed.Starting from the heat source condition, the thermal conductivity coefficient and three-dimensional temperature field strength of transformer structure are determined respectively, and the temperature field of amorphous alloy dry transformer is analyzed.On this basis, the leakage induction law of temperature rise and the physical parameters of core loss and winding loss of the transformer at high frequency are calculated to realize the real-time monitoring of abnormal temperature rise of the amorphous alloy dry transformer.The simulation results show that with the increase of the total value of temperature loss, the transformer temperature field is always in a controllable range, and the actual electronic impact load also starts to appear in a stable numerical range.It is proved that the continuous temperature rise of the variable pressure structure can be effectively solved by using this method.