Research on the Accurate Continuous Calibration System for Current Transformer

The current transformer, as one of the basic electrical system components, by its accuracy and stability, ensures the metering, protection and analysis of the power system. The current transformers are wildly used since 1884, when the electromagnetic transforms were invented. Recently, the capacity of electrical power is greatly enhanced, and the intelligent electric grid is built. To meet the requirement of intelligent electric grid, the electronic current transformer is substituting for the conventional current transformer because of it is without a ferromagnetic core and it has the wide dynamic range and the frequency band.