高阻抗变压器的不同实现方式与抗短路性能分析  

Analysis of Different Realization Modes and Auti-short-circuit Performance of High Impedance Transformer

作　　者：胡诗尧 容春艳 李中祥 阴祖强 李英 王贵娟 HU Shiyao;RONG Chunyan;LI Zhongxiang;YIN Zuqiang;LI Ying;WANG Guijuan(State Grid Hebei Economic Technology Research Institute,Shijiazhuang 050000,China;TBEA Hengyang TransformerCo.,Ltd.,Hunan Hengyang 421007,China)

机构地区：[1]国网河北省电力公司经济技术研究院,石家庄050000 [2]特变电工衡阳变压器有限公司,湖南衡阳421007

出　　处：《高压电器》2024年第8期147-155,共9页High Voltage Apparatus

基　　金：国网河北省电力有限公司科技项目(5204JY210005)。

摘　　要：以电力系统中广泛使用的典型三绕组240 MVA/220 kV电力变压器为例,阐述了高阻抗变压器实现的工作原理和4种典型结构特点,分析了不同短路工况下的抗短路能力,并对3种典型结构高阻抗变压器的抗短路性能进行了对比分析,评估了不同结构高阻抗变压器的短路性能优劣性。结果表明,高压内置和串抗结构高阻抗变压器均具有较好的抗短路性能,且串抗结构在高中低绕组轴向力及垫块压缩应力、调压绕组环向应力和变压器端部轴向作用力方面更具有优势,且整体抗短路性能最好。The typical three winding 240 MVA/220 kV power transformer,which is used widely in power system,is taken as an example,the working principle and four typical structural characteristics of high impedance transformer are described,the short-circuit resistance under different short-circuit conditions is analyzed,the short-circuit resistance performance of three high impedance transformers with typical structures is compared and analyzed and the pros and cons of the short circuit performance of the high impedance transformer is assessed.The results show that the high impedance transformer with high-voltage built-in and series reactance structure has good short-circuit resistance performance,and the series reactance structure has more advantages in the axial force and the compressive stress of high,medium and low winding,the circumferential stress of regulating winding,the end axial force of transformers and the overall short-circuit resistance is the best.

关 键 词：变压器 高阻抗 短路 应力 轴向力 

分 类 号：TM426[电气工程—电器]