High-bandwidth, very-high-precision device for measuring HVDC current

摘要

The device (20) has a Faraday sensor (1) including a waveguide (4) mounted around a high voltage conductor (5), where the sensor provides a digital signal representative of a value of a current. A measuring shunt (21) mounted in series with the conductor provides another digital signal representative of the value of the current. A calculation unit (23) extracts direct current (DC) components from the signals, and calculates the value of a Faraday coefficient based on the DC components, where the current is obtained based on the value of the Faraday coefficient and of the former digital signal. An independent claim is also included for a HVDC sub-station.