作　　者： ; ; ;

机构地区： 武汉大学电气工程学院

出　　处： 《四川电力技术》 2009年第6期45-48,共4页

摘　　要： 分析了电力变压器铁心产生剩磁的原因及其危害。通过对变压器有剩磁和无剩磁两种情况下的对比分析,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软件仿真验证了检测方法的可行性。 The reasons of the residual magnetism generated by transformer core are analyzed as well as its hazards. Through the comparative analysis of two situations with and without the residual magnetism, it is found that the even harmonic of excitation current is a sign of the residual magnetism existing. The detection method is put forward which determines the residual magnetism in the transformer by measuring the even harmonic of excitation current. The feasibility of the detection method is proved by the field experiment and EMTP software simulation.

关 键 词： 电力变压器 剩磁 励磁电流 偶次谐波

领　　域： [电气工程]