Clamp Rogowski Coil Electronic Current Transformer Based On Printed Circuit Board

With the universal use of embedded and communication systems in the power system and the promotion of IEC61850 digital substation statute,power systems be more intelligent and automated. Rogowski coil in the current measurement will also receive a wide range of applications. In this paper, owing to the insurmountable shortcomings of clamp electromagnetic current transformer, bring up clamp PCB Rogowski coil electronic current transformer as the object of study.First of all, based on the in depth analysis of a mathematical model of Rogowsk coil, analysis the self integration,passive and active outside integration of Rogowski coil, introduce the design of the clamp PCB Rogowski coil. and do position, adjacent bus, opening error analysis and simulation for clamp PCB Rogowski coil which for current transformer online checking system. Second, analyses the signal conditioning circuit in depth,mainly including integrator's DC and AC error, and made a number of design methods which should be the basic compliance for improvement circuit performance, and gives the ADC selection principle, the ADC error analysis in A / D converter circuit also gives general principles for performance improvement in ADC application circuit.Finally,introduce clamp PCB Rogowski coil in two application,using in current transformer online calibration system and EAF current measurement system. Issue integrator frequency deviation test,integrator temperature Test,clamp PCB Rogowski coil plus integrator linearity test,clamp PCB Rogowski coil opening and closing test and current transformer online calibration system scene running test.Experimental and engineering examples show that clamp PCB Rogowski coil electronic current transformer have high accuracy and very wide dynamic range, will have a very broad application prospects.