电力变压器铁心剩磁检测方法研究  

Research on Detection Method of Residual Magnetism of Power Transformer Core

作　　者：陈文臣[1] 刘帆[2] 陈颢[3] 李子浈[4] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]重庆大学输变电装备及系统安全与新技术国家重点实验室,重庆400044 [3]江苏方天电力技术有限公司,江苏南京211102 [4]二滩水电开发有限责任公司,四川成都610051

出　　处：《陕西电力》2009年第10期58-61,共4页Shanxi Electric Power

摘　　要：分析了电力变压器铁芯产生剩磁的原因及其特点。通过对变压器有剩磁和无剩磁两种情况对比分析,指出励磁电流的偶次谐波是剩磁存在的标志。并提出通过对励磁电流偶次谐波的测量来判断变压器有无剩磁的检测方法,现场试验和EMTP软件仿真验证了该检测方法的可行性。This paper analyzes the reason and its characteristics of generating residual magnetism in transformer iron core. Through the comparative analysis of two situations in having residual magnetism and having no residual magnetism, it is found that the even harmonic of excitation current is a sign of existing residual magnetism. The paper also puts forward the detection method to determine whether there is residual magnetism in the transformer by measuring the even harmonic of excitation current. The feasibility of the method is verified by field experiment and EMTP software simulation.

关 键 词：电力变压器 剩磁 励磁电流 偶次谐波 

分 类 号：TM411[电气工程—电器]