A sensing optical fiber ring and reflective all-fiber current transformer

Abstract

The invention provides a sensing optical fiber ring, a winding method of the sensing optical fiber ring and a reflective all-optical fiber current transformer based on the sensing optical fiber ring. By means of the sensing optical fiber ring, the integration degree of an all-fiber current transformer system is improved, the influence on the measurement of the all-fiber current transformer due to the performance of lambada / 4 wave plates is avoided, meanwhile, measurement errors, due to the fact that the Verdet coefficients at different places of an existing twisted optical fiber are different, of the all-fiber current transformer are eliminated, and common technical problems of an existing all-optical fiber current transformer are solved. The sensing optical fiber ring comprises a twisted optical fiber and a coil skeleton, wherein the twisted optical fiber comprises a starting rotation section and a high-speed constant-speed rotation section according to the twisting speed, the tail end of the high-speed constant-speed rotation section is plated with a reflective film, the tail end, where the reflective film is plated, of the high-speed constant-speed rotation section and the central point of the starting rotation section are enabled to be located on the same axial line of the coil skeleton, and the starting point and the ending point of the starting rotation section are located on the same axial line of the coil skeleton.

Description

technical field [0001] The invention relates to a sensing optical fiber and a winding method thereof. The invention also relates to the sensing optical fiber ring and a reflective all-fiber current transformer using the sensing optical fiber ring. Background technique [0002] With the continuous improvement of the voltage level and capacity of the power grid in the power system and the requirements of informatization, digitization, automation, and interaction of the smart grid, traditional current transformers have gradually exposed serious defects, and are increasingly unable to meet the requirements of power grids. The development requirements of the system, so the research of optical current transformer is imminent. A new type of all-fiber current transformer made of magneto-optical glass fiber made of magneto-optical glass is based on the Faraday effect, which can overcome the shortcomings of traditional current transformers to a certain extent and will gradually repla...

AI Technical Summary

Problems solved by technology

Because of this defect, the output change of the Sagnac sensor cannot be distinguished from the influence of the external environment or the change of the current itself in the high-voltage wire, which seriously affects the measurement accuracy of the current transformer and is not practical.

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