A New Method Of Active Electronic Compensation For Current Transformer Based On Coordinate Control

The purpose is that the current transformer often working in wide range current could always get the output current with less error, what means that the CT is in steady low error grade. Based on research fruit of grand old men, a new method of active electronic compensation for current transformer is put forward. This method link amplitude adjust with phase adjust together, and perform coordinate control .By the simulation principle, the CT error compensation can be realized through operational amplifier, integrate circuit, FET, and other electronic component. When the phase is changed, the used phase transformers is voltage - control phase transformer which is changed by phase transformer consist of ordinary operation amplifier consist of ordinary operational amplifier. The design of this phase transformer can turn the error into the phase transform capacity.This compensation device is fit for measure in wide range . The result of experiment proved that this CT can make its grade keeping at 0.2 grade in wide range.