For the existing microprocessor based protection devices
reducing the effect of the current distortion due to saturation
can be accomplished by reconstruction of the undistorted
signal, which requires development of special signal
processing algorithms [4]– [7] or completely eliminating the
nonlinear effects by replacing CTs with non-conventional
current sensors such as Rogowski Coils [8] or optical CTs [9],
which are typically associated with higher cos