All-fiber current transformer and working method thereof

Abstract

The invention discloses an all-fiber current transformer and a method thereof, aiming to overcome the defects that a traditional electromagnetic current transformer is easily subjected to electromagnetic interference and has complicated insulation structure, magnetic saturation existence and the like. The technical scheme of the invention comprises the following steps of: demodulating light output by a light source into X-axis polarized light and Y-axis polarized light by a Y-branch integrated optical phase modulator; converting into sinistral circular polarized light and dextral circular polarized light in a lambda/4 retarder; generating a magnetic field by a current in a lead due to the faraday effect; returning the two beams carrying faraday effect phase information to the Y-branch integrated optical phase modulator to intervene when beams in optical fiber is transmitted around the lead; and enabling an interference result to enter a subsequent treatment system from the optical fiber coupler to acquire the faraday effect phase information at the measuring point. The invention avoids the hidden danger of ferromagnetic resonance and magnetic saturation by adopting the optical fiber as a sensing medium and has a series of advantages of high detection accuracy, good environmental suitability, and the like.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes a new design for a type of electricity sensor called an All Fiber Current Transformer (AFCT). It allows two different types of light waves with opposite phases to travel through them simultaneously, resulting in improved detection capabilities even if there's some slight differences between these waveforms due to ambient conditions or other influences like pressure variations. Additionally, its use eliminates the problem of randomly oriented polarized states caused by the rotation of the crystal inside itself. Overall, this innovation provides technical benefits including increased efficiency, reduced noise levels, better performance during extreme weather situations, enhanced resistance against damage, and more reliable operation than previous methods.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the performance (efficacy) or reliability of an optofluidic flowmeter that uses fibre technology instead of conventional electricity conductor materials like copper wires due to its better resistance against external factors like heat and vibration compared to other types of material. Additionally, the use of specialized components can improve their durability without compromising signal quality.

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