计及励磁涌流累积下变压器绕组受力分析  

Force Analysis of Transformer Windings Considering the Accumulation of Excitation Inrush Current

作　　者：贾本岩 白兆玉 井永腾 陈春锦 刘夏 李冬雪 JIA Benyan;BAI Zhaoyu;JING Yongteng;CHEN Chunjin;LIU Xia;LI Dongxue(Tebian Electric Shenyang Transformer Group Co.,Ltd.,Shenyang 110020,China;Research Institute of Power Transmission and Transformation Technology,Shenyang University of Technology,Shenyang 110870,China;CRRC New Infrastructure Investment and Development Co.,Ltd.,Beijing 100071,China;Economic and Technical Research Institute of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110015,China)

机构地区：[1]特变电工沈阳变压器集团有限公司,辽宁沈阳110020 [2]沈阳工业大学输变电技术研究所,辽宁沈阳110870 [3]中车新型基础设施投资开发有限公司,北京100071 [4]国网辽宁省电力有限公司经济技术研究院,辽宁沈阳110015

出　　处：《变压器》2025年第4期33-40,共8页Transformer

摘　　要：电力系统空载合闸的瞬间,励磁涌流的影响使变压器发生磁路饱和现象,进而产生巨大的电磁力并可能导致其损坏。因此,本文作者以一台800kVA的变压器样机为例,通过场路耦合法和有限元法相结合,建立励磁涌流冲击下变压器绕组受力分析数学模型,通过机理分析和仿真研究,探究励磁涌流下变压器漏磁的幅值及其分布规律,并对绕组受力形变特性进行分析,最后分析累积效应对绕组形变特性的影响。结果表明:合闸角度与剩磁状态的差异会直接影响绕组受力和形变情况,多次重合闸会加大绕组损坏概率。At the moment of no-load closing of the power system,the impact of excitation inrush current causes the transformer to experience magnetic circuit saturation,which in turn generates huge electromagnetic force and may cause damage.Therefore,taking an 800kVA transformer prototype as an example,this article establishes a_mathematical model for analyzing the force on the transformer winding under excitation inrush current impact through a combination of field circuit coupling method and finite element method.Through mechanism analysis and simulation research,the amplitude and distribution law of transformer leakage under excitation inrush current are explored,and the deformation characteristics of the winding under force are analyzed.Finally,the influence of cumulative effect on the deformation characteristics of the winding is analyzed.The results indicate that the difference between the closing angle and the residual magnetization state directly affects the force and deformation of the winding,and multiple reclosing increases the probability of winding damage.

关 键 词：变压器 空载合闸 励磁涌流 场路耦合 受力形变 

分 类 号：TM402[电气工程—电器]