直流偏磁下变压器绕组振动特性分析  

Vibration Analysis of Transformer Winding Under DC Bias

作　　者：吕舒艺 李晓华 章李烽 赵文彬 夏能弘 黄堃 杨勇 Lü Shuyi;LI Xiaohua;ZHANG Lifeng;ZHAO Wenbin;XIA Nenghong;HUANG Kun;YANG Yong(School of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Guangzhou Power Supply Bureau Limited,Guangzhou 510245,Guangdong,China)

机构地区：[1]上海电力大学电力工程学院,上海200090 [2]广州供电局有限公司,广东广州510245

出　　处：《电气传动》2021年第15期61-67,75,共8页Electric Drive

基　　金：国家自然科学基金(51607110)。

摘　　要：为了研究直流偏磁下变压器发生短路故障时绕组的振动特性,基于“电磁-结构”多物理场耦合分析的方法,建立了考虑绝缘垫块非线性特性的变压器三维有限元模型。通过仿真分析了不同偏磁电流下突发短路故障时绕组的短路电流及振动特性,结果表明:随着偏磁电流的增加,绕组短路电流、振动位移的幅值发生不同程度的偏移且低次谐波分量增加明显,并通过分布反馈光纤激光器测振系统对模型进行了验证。研究结果为分析直流偏磁对变压器振动特性的影响提供了一些参考依据。In order to study the vibration characteristics of the windings when a short-circuit fault occurs in the transformer under DC bias,based on the electromagnetic-structure multi-physics coupling analysis method,a three dimensional finite element model of the transformer was established in consideration of the non-linear characteristics of the insulation block.The short-circuit current and vibration characteristics of the winding during a sudden short circuit fault under different bias currents were analyzed through simulation.The results show that with the increase of the bias current,the amplitudes of the winding short-circuit current and vibration displacement are shifted to different degrees and low the sub-harmonic component increased significantly.The model was verified by distributed feedback fiber laser vibration measurement system.The results provide some references for analyzing the influence of DC bias on the vibration characteristics of transformers.

关 键 词：直流偏磁 多物理场 绕组振动 分布反馈光纤激光器 

分 类 号：TM41[电气工程—电器]