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Design and Performance Analysis of a Differential Current Sensor for Power System Applications

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3 Author(s)
Masi, M.G. ; Dept. of Electr. Eng., Alma Mater Studiorum-Univ. di Bologna, Bologna, Italy ; Peretto, L. ; Tinarelli, R.

Current measurement is required to ensure the correct operation of power systems. Conventional current transformers are still widely employed in such networks, but their well-known limits make them not suitable for the incoming smart meters. In this paper, a current sensor based on proper measurements of the magnetic field produced by the primary current is proposed. Its main feature is the capability, owing to its particular geometry, of neglecting the effect of external fields without using traditional coil structure. An experimental analysis of its performance in both time and frequency domains is presented and discussed.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:61 ,  Issue: 12 )