Novel non-intrusive all-fiber reciprocal voltage and electric field sensor

Abstract

The invention discloses a novel non-intervention all-fiber reciprocal voltage electric field sensor. The optical path system includes a light source connected in sequence by an optical fiber, a polarization maintaining coupler A, a Y waveguide, a polarization maintaining coupler B, a polarization maintaining delay fiber, a 45° optical rotation mirror, a collimator, a lithium niobate waveguide and a reflector. The invention utilizes the Pockels effect of the lithium niobate waveguide to realize the sensitivity to the measured voltage electric field. In the optical path, the 45° rotator is connected by a polarization-maintaining optical fiber before, and then by a low-polarization optical fiber, so as to ensure that the two orthogonal linearly polarized lights participating in the interference experience the same optical path in the optical path, and realize the reciprocity of the optical path. This all-fiber reciprocal sensitive optical path does not pursue the same length of two sections of optical fiber, which reduces the system's requirements for technology; its reciprocity ensures the measurement accuracy and stability of the system; its all-fiber connection improves the environmental adaptability of the system performance and anti-interference ability. The invention also utilizes the integrated optical process technology to package the sensor head as a whole, which improves the practicability of the invention.

Description

technical field [0001] The invention belongs to the technical field of optical voltage and electric field sensing, and in particular relates to a novel non-invasive all-fiber reciprocal voltage and electric field sensor based on the Pockels effect. Background technique [0002] The new-generation power system based on power energy flow and big data intelligent information flow has been comprehensively promoted in various fields such as global energy, transportation, industry, and military, and has led to technological changes in various fields of human beings. In electrical systems in various fields, voltage and electric field measurement are important components of system electrical parameter measurement, and their fast, accurate and reliable measurement directly affects the stable and reliable operation of various electrical systems. Therefore, the measurement technology of voltage and electric field And measuring equipment has also become the key technical support and cor...

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is: in view of the existing optical voltage electric field sensor with complex optical path structure, poor stability, poor environmental adaptability and anti-interference ability, and unsuitable for engineering applications, based on the Pockels effect using lithium niobate waveguide, A new type of non-intrusive all-fiber reciprocal voltage electric field sensor is proposed, which improves the measurement accuracy, stability, environmental adaptability and anti-interference ability, and lays a solid foundation for promoting the engineering application of optical voltage electric field sensors in power systems in various fields Base

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