Electrical current metering with a dual interferometric configuration and serrodyne signal processing

Jorge, P A S; Caldas, P.; Ferreira, L A; Lobo Ribeiro, Antonio B.; Santos, J L; Farahi, F

http://hdl.handle.net/10284/7856

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Authors

Jorge, P A S

Caldas, P.

Ferreira, L A

Lobo Ribeiro, Antonio B.

Santos, J L

Farahi, F

Abstract(s)

A bulk interferometric configuration for electrical current remote sensing in high voltage environments based on the Faraday effect is described. The combination of Sagnac’s reciprocal properties with a Mach–Zehnder processing interferometer in the same sensing head is used to implement serrodyne processing for current sensing. A theoretical analysis based on the Jones matrix is presented. Experimental results that validate the exploited concept are obtained, showing linearity up to 1800Arms and waveform reproduction at 50 Hz. The possibility of using the proposed interferometric concept to simultaneously fulfil the requirements associated with metering and relaying applications is also addressed.