电流互感器铁心饱和特性的研究

Research on core saturation characteristics of current transformer

电流互感器(CT)铁心饱和将会引起互感器二次侧电流发生畸变,从而使二次侧电流无法准确地反映一次侧电流的信息,导致继电保护装置无法快速准确地动作,切断故障回路.所以CT的铁心饱和问题是影响继电保护装置的关键问题.针对影响CT饱和的不同因素进行分析,并提出了相应的防止其饱和的方法和对策.

Distortion of secondary current is caused by current transformer（CT） core saturation.If secondary current can t reflect the information of primary current accurately,relaying protection device can not operate correctly and fast.So CT core saturation is a key problem for relaying protection device.Different influences on CT saturation are analyzed in this paper.The methods about avoiding CT saturation are proposed.