负载电流下的变压器绕组振动仿真分析  

Simulation and Analysis of Transformer Winding Vibration Under Condition of Load Current

作　　者：赵义松[1] 李学斌[1] 于在明[1] 张佳[2] 陈彦文[2] ZHAO Yisong LI Xuebin YU Zaiming ZHANG Jia CHEN Yanwen(Electric Power Research Institute of State Grid Liaoning Electric Power Co. , Ltd. ,Shenyang 110006, China School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,辽宁沈阳110006 [2]沈阳工业大学电气工程学院,辽宁沈阳110870

出　　处：《电器与能效管理技术》2017年第12期50-54,69,共6页Electrical & Energy Management Technology

基　　金：国网辽宁省电力公司电力科学研究院科技项目(2016YF-26)

摘　　要：以一台35 k V油浸式配电变压器为例,利用有限元法对变压器铁心及绕组进行了三维瞬态电-磁-固单相耦合计算。首先计算了变压器在额定负载电流情况下的三维电磁场,同时得出绕组及铁心所受电磁力。以三维电磁场节点的电磁力为载荷,耦合到三维瞬态结构场中作为力源,并考虑绝缘垫块非线性特性及螺栓预紧力的作用,模拟了变压器在额定负载电流条件下的绕组振动过程,得出了不同时刻变压器绕组振动位移、速度、加速度等的分布及其变化曲线,总结出绕组振动规律。最后通过负载电流试验验证了仿真计算结果的准确性,为进一步了解绕组故障、短路等不同条件下的振动提供了有效方法。The 3D electric-magnetic-solid coupling for a 35 kV distribution transformer was calculated using the finite element method. Firstly, the 3D-electromagnetic field of the transfbrmer on the rated current condition was calculated,the electromagnetic force of the winding and core was calculated at the same time. Results of the 3D electromagnetic field node force were coupled to the 3D structure filed model as force sources, Then,the distribution of the vibration at different time and each point vibration changing curve versus time were obtained by considering the bolt preload and insulation pad nonlinear characteristics, and the aim is to simulate the transient vibration process of the transformer on the rated load condition, Finally, the winding vibration law was summarized from the vibration distribution at different time, and the simulation results were verified by experiments, which provides an effective method for the further understanding of the vibration under dift〉rent conditions such as winding fault and short circuit.

关 键 词：电力变压器 绕组 振动 耦合 诊断 

分 类 号：TM421[电气工程—电器]