基于故障漏磁分析的变压器短路阻抗特性研究  

Research on Short Circuit Impedance Characteristics of Transformer Based on Fault Magnetic Flux Leakage Analysis

作　　者：宋辉 苑龙祥 杨佳明[2] SONG Hui;YUAN Long-xiang;YANG Jia-ming(State Grid Xinjiang Company Limited Electric Power Research Institute,Urumqi 830011,China;不详)

机构地区：[1]国网新疆电力有限公司电力科学研究院,新疆乌鲁木齐830011 [2]哈尔滨理工大学,工程电介质及其应用技术教育部重点实验室,黑龙江哈尔滨150080

出　　处：《电力电子技术》2023年第3期48-52,共5页Power Electronics

基　　金：国家自然科学基金(51337002);黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2016162)。

摘　　要：变压器绕组在受到短路冲击下,会出现明显的漏磁情况。通过软件仿真与实验验证的方法,对不同情况下绕组主空道处的漏磁情况进行分析,分别考虑轴向漏磁与径向漏磁下的磁场分布规律,总结变压器受到短路电流冲击的影响;对形变情况下的绕组进行分析,讨论其磁场分布情况与受力情况,对其抗短路能力进行探讨,结果证明形变后的绕组在两端位置更容易受到短路电流的冲击,需要利用相应措施加以防护,以保证电力系统运行的稳定。The transformer winding will have obvious magnetic leakage under the impact of short circuit.Through the method of software simulation and experimental verification,the magnetic flux leakage at the main empty passage of the winding under different conditions is analyzed,and the magnetic field distribution law under axial and radial magnetic flux leakage is considered respectively,and the influence of short circuit current impact on the transformer is summarized.The winding under deformation is analyzed,and its magnetic field distribution and stress condition are discussed,and its short circuit resistance ability is discussed.The results show that the deformed winding is more vulnerable to the short circuit current impact at both ends,and corresponding measures need to be taken to protect it,so as to ensure the stability of power system operation.

关 键 词：变压器 漏磁 短路电流冲击 抗短路 

分 类 号：TM41[电气工程—电器]