Rogowski coil current transformers have been rapidly developed in recent years for their quick response

low price and absence of magnetic saturation.Conventional hand-made Rogowski coils cannot entirely meet the requirements for the ideal one

hence innovative Rogowski coils based on printed circuit boards have been developed to improve the accuracy and stability.This paper presents a twin-loop Rogowski coil to supplement the existing combined Rogowski coil and planar Rogowski coil.Experimental results show that the twin-loop Rogowski coil has higher measurement accuracy.