变压器差动保护用电流互感器饱和的原因分析及解决办法

Analysis of current transformer saturation in transformer differential protection and solution to it

针对沙角A电厂脱硫变压器差动保护用电流互感器在较小的一次电流下发生饱和的现象,从电流波形、互感器的稳态饱和特性、暂态饱和特性等方面进行了分析计算,并根据分析结果,提出了解决办法,取得了预期效果。

In connection with the fact that light primary current saturated the current transformer （CT） in transformer differential protection in Shajiao A Power Station, the current waveform as well as the CT steady and transient saturation characteristics were analyzed and calculated. Based on the analytical result, improving solution was presented and desired effect achieved.