Novel optical fiber transformer

Abstract

The invention discloses a novel optical fiber transformer which is simple in light path structure, high in integration level, good in reciprocity, more reliable and convenient to popularize. The transformer comprises a light source, an optical device integration assembly, a polarization maintaining optical fiber and a sensing optical fiber that are sequentially connected via an optical cable, wherein the light source is connected in parallel with a differential light receiver; the differential light receiver is connected to a closed loop signal processing unit at the same time; the transformer further comprises faraday reflectors and a wire; the two faraday reflectors are arranged on the sensing optical fiber; a polarizer and a polarized light modulator are integrated in the optical device integration assembly; the transformer further comprises a light source driving unit; the light source driving unit is used for providing constant current and temperature control information to the light source and receiving feedback signal input of the closed loop signal processing unit at the same time to allow the light source to output stable light intensity information all the time; the transformer further comprises a power supply; and the power supply is used for converting a direct current or alternating current mains supply into weak current capable of being used by a circuit board in the transformer, that is to say, the power supply supplies power to the light source driving unit and the closed loop signal processing unit.

Description

technical field [0001] The invention relates to a novel optical fiber transformer, in particular to an optical fiber current transformer. Background technique [0002] Due to its inherent characteristics, fiber optic current transformers have incomparable advantages over traditional electromagnetic current transformers. With the continuous improvement of its reliability, the optical fiber current transformer will become the main equipment for electric energy measurement and protection in the electric power field, which has gradually become the consensus of the industry at home and abroad. [0003] However, the existing optical fiber current transformers have the following disadvantages: 1. The structure of the optical path system is complex, which is not conducive to system integration; 2. The components in the optical path are easily affected by working conditions such as temperature, and the measurement error is large, so closed-loop feedback cannot be realized. Contents...

AI Technical Summary

Problems solved by technology

[0003] However, the existing optical fiber current transformers have the following disadvantages: 1. The structure of the optical path system is complex, which is not conducive to system integration; 2. The components in the optical path are easily affected by working conditions such as temperature, the measurement error is large, and closed-loop feedback cannot be realized.

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