变压器直流扰动多物理参数变化特性

针对变压器直流扰动多物理参数变化问题,研究了不同直流扰动状态下多物理参数变化特性。构建变压器直流扰动状态下多物理场模型,分析绕组/铁芯振动机理与箱体涡流损耗原理。通过变压器多物理场顺序耦合算法循环迭代求解电磁参数,将电磁参数作为机械、涡流场输入参数,进一步求解振动加速度及损耗参数。通过多物理场顺序耦合算法,仿真分析变压器不同直流扰动状态下电磁参数与机械振动、箱体涡流损耗的变化情况及对应关系。进一步,搭建动模实验平台,采集变压器不同直流扰动状态下内部绕组电流、励磁电流及振动加速度数据,并与仿真结果进行对比,验证本文方法的有效性和正确性。

Variation of Multi-physical Parameters in DC Disturbance of Transformer

In this paper, multi-physical parameter variation of transformer dc disturbance is studied under different dc disturbance states. The multi-physical field model under dc disturbance of transformer is constructed to analyze the winding/core vibration mechanism and eddy current loss principle of box body. The electromagnetic parameters were solved iteratively by the sequential coupling algorithm of transformer multi-physical fields. The electromagnetic parameters were taken as the input parameters of mechanical and eddy current fields, and the vibration acceleration and loss parameters were further solved. Based on the sequential coupling algorithm of multiple physical fields, the variation of electromagnetic parameters and mechanical vibration and eddy current loss of transformer box under different DC disturbance conditions is simulated and analyzed. Furthermore, a dynamic model experiment platform was built to collect the data of internal winding current, excitation current and vibration acceleration under different DC disturbance states of the transformer, and the results were compared with the simulation results to verify the validity and correctness of the proposed method.