Sensing ring of all-fiber electronic current transformer

Abstract

The invention discloses a sensing ring of an all-fiber electronic current transformer, which consists of a sensing ring body, a sensing ring upper cover, a sensing optical fiber, a reflector, a 1 / 4 wave plate and a polarization-preserving fiber, wherein both the sensing ring body and the sensing ring upper cover have an annular structure, a U-shaped groove is preserved on the upper surface of the sensing ring body and the sensing optical fiber is wound at the bottom surface of the U-shaped groove uniformly; the sensing ring upper cover is fixed on the upper part of the sensing ring body and closes the U-shaped groove; and the reflector and the 1 / 4 wave plate are positioned on two ends of the sensing optical fiber respectively and fixed in the U-shaped groove, the reflector and the 1 / 4 wave plate are parallel in the direction of the tangents of the annular structures and arranged in a way of clinging together along the direction of the normal of the annular structures, and the tail end, fixedly provided with the 1 / 4 wave plate, of the sensing optical fiber is connected with the polarization-preserving fiber which serves as the leading-out end of the sensing ring. The sensing ring has the characteristics of flexible application mode, small volume, light weight, high safety, convenient installation and maintenance and the like and provides a necessary guarantee for the development and application of the all-fiber electronic current transformer.

Description

technical field

[0001] The invention relates to a sensitive ring structure for an optical fiber electronic current transformer. Background technique

[0002] With the development of power systems in the direction of high voltage and high current, although traditional electromagnetic current transformers are relatively mature, there are engineering technical problems such as large and bulky sensitive rings, difficult installation, high cost, complex insulation structures, and magnetic saturation phenomena. lack of. Although the Rogowsgi coil type electronic current transformer has no magnetic saturation phenomenon in its sensitive ring, its high-voltage side is an active circuit, which will have a certain impact on the reliability of the transformer, and the sensitive ring has a relatively high impact on the secondary load and installation requirements. High, magnetic shielding is required. Magneto-optic glass type and all-fiber electronic current transformers based on opti...

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