An integrated all-fiber-optic current transformer

Abstract

The invention relates to an integrated all-fiber optical current transformer. The sensitive unit comprises a sensitive unit body structure, an upper insulated cover plate, a lower insulated cover plate, a sensitive fiber ring and a polarization-maintaining fiber pigtail, wherein the sensitive unit body structure is a ring structure with double-sided ring grooves and is provided with a sensitive fiber winding area and a fiber fusion area, the sensitive fiber winding area is a ring groove arranged along the ring on one end surface of the ring structure for accommodating the sensitive fiber ring, and the fiber fusion area is the other ring groove arranged along the ring on the other end surface of the ring structure for accommodating the polarization-maintaining fiber pigtail and a fusion point formed after fusion; the lower insulated cover plate covers the sensitive fiber winding area; and the upper insulated cover plate covers the fiber fusion area. The all-fiber optical current transformer can be integrated with a high-voltage isolation circuit breaker, has the advantages of simple structure, small size, low mounting and maintenance difficulty, high safety performance and the like, and can meet integration and intelligence requirements of the intelligent substation of the new generation.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an integrated all-optical fiber current transformer. Background technique [0002] Compared with conventional current transformers, all-fiber current transformers have the advantages of eliminating magnetic saturation, fast response to power system faults, eliminating ferromagnetic resonance, excellent insulation performance, adapting to the digital development of electric energy measurement and protection, large dynamic range, and frequency response. With the advantages of wide range and good economy, it meets the requirements of the strong smart grid for "sensing accuracy, transmission fiber optics, and output digitalization" for the new generation of transformers. It represents the future development trend of current transformer technology and is beginning to be applied in a new generation of smart substations, especially its integrated application with high-voltage is...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an integrated all-fiber-optic current transformer for the existing all-fiber-optic current transformer, which has the risk of damaging the optical fiber and the welding point when it is integrated with a high-voltage isolation circuit breaker, thereby affecting safety performance and integration. By setting a sensitive unit with a specific structure, the application integrated with the high-voltage isolation circuit breaker is realized. It has the advantages of simple structure, small size, low difficulty in installation and maintenance, and high safety performance, and can adapt to the integration and intelligence requirements of the new generation of smart substations.

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