基于拉板过热的暂态过励磁能力的计算

Calculation of Transient Overexcitation Capacity Based on Overheating of Tie Plate

针对电力变压器拉板的过热问题,通过调研发现对暂态过励磁工况的研究较少。本文作者提出了不同程度过励磁条件下磁场分布的差异,并通过仿真进行了验证。结合物理过程的分析,采用等效磁路并联的模型构建了数学 算法。该算法可以评估对应产品拉板耐受暂态过励磁的能力。

Regarding to overheating of tie plate in power transformer,there is little research on transient overexcitation condition.The differences of magnetic field distribution under different stage of overexcitation is proposed and verified by physical simulation.Based on analysis of physical process,the mathematical algorithm is constructed by using the parallel model of equivalent magnetic circuit.The algorithm can be used to evaluate the capacity of the tie plate to withstand transient overexcitation.