【摘要】 在变压器差动保护中 ,励磁涌流是十分值得关注的问题。分析了近几年来提出的偶次谐波制动、半波叠加涌流制动和利用波形对称构成的励磁涌流新判据的原理和特性。分析表明 ,按波形对称原理构成的涌流判据有较好的优越性。在此基础上对以上涌流新判据作出了相应的评价。它对新判据的使用、改进及构成的保护调整具有指导意义更多还原

【Abstract】 The inrush current is of great importance in differential protection of power transformer.The principles and characteristics of some inrush current criteria proposed in recent years are analyzed.They are even harmonics inhibition,half circle added inrush current inhibition and symmetric waveform formed inrush current.It shows that the inrush current criterion formed by symmetric waveform principle is the best.Based on the analysis the evaluation of these new criteria is made. It is helpful for their application and improvement, and also for the setting of protection relay.更多还原