OPTICAL CURRENT TRANSDUCER WITH OFFSET CANCELLATION AND CURRENT LINEARIZATION

摘要

There is provided a system for use with a fiber-optic current transducer. The system includes a processing unit (132) configured to transduce a first light signal into a first electrical signal (X). The processing unit (132) is further configured to transduce a second light signal into a second electrical signal (Y). The processing unit (132) is configured to remove offsets from the first electrical signal and the second electrical signal by forcing the first electrical signal and the second electrical signal to be on the same per unit basis. Furthermore, the processing unit (132) is configured to combine the first electrical signal (X) and the second electrical signal (Y) to produce a composite signal, the composite signal being free of the offsets. And the processing unit (132) is further configured to linearize the composite signal to produce an output current indicative of a current flowing in a conductor (113) disposed proximate the FOCT.