With a non-linear model for the saturation of magnetic core of the current transformer, the transient equation for magnetic flux can be constructed. Consequently, the influence of CT transient status on the digital protective device can be analysed.

• 电流互感器是电力系统和二次设备联接的一个重要设备,通过CT铁芯电磁场饱和非线性模型,考虑铁芯饱和机理,建立含磁链的电流状态方程,可以分析电力系统故障时CT暂态对数字保护设备的性能影响。