Analysis of measurement precision of electronic current transducer

From the analysis of the basic measuring principle of the electronic current transducer,the current transducer with Rogowski coil as its sensor must apply the integrator,the precision of which influences greatly the precision of electronic current transducer.The influence of traditional analog integrator on measuring precision is analyzed from three aspects of integrated operational amplifier:the maladjusted input voltage,bias current and its drift,the gain and band width and the temperature change.The error formula is summarized.The necessity and feasibility of the digital integrator are presented,and its realization plan is provided.