摘要
阐述变压器励磁涌流产生的机理,分析变压器差动保护装置的涌流制动方案,比较基于二次谐波、波形对称及间断角等制动方法的优缺点;指出变压器差动保护误动的原因和各种制动方法存在的问题,为现场工作的继电保护人员分析故障、校验保护提供理论支持.
The inrush current generated in transformer is introduced, the used inrush current restraint schemes for transformer differential protection devices are analyzed, and the implemented schemes based on secondary-harmonics, waveforms symmetry, interruptive angles are compared in this paper. The reasons of transformer differential protection＇s malfunction and the problems of inrush current restraint methods are presented. They can provide theoretical support for protection operators to anlyse power system faults and check the orotections operation.
出处
《电力科学与技术学报》
CAS
2009年第3期58-62,67,共6页
Journal of Electric Power Science And Technology
关键词
变压器
励磁涌流
二次谐波制动
波形对称
间断角
transformer
inrush-current
secondary-harmonic restraint
waveform symmetry
interruptive angle
