Optical voltage transformer and encapsulating method thereof

Abstract

The invention relates to an optical voltage transformer and an encapsulating method thereof. The transformer includes a transformer shell, an insulator, an conductor electrode, an insulating silicone rubber, an optical voltage sensing head, an optical fiber and an electric unit, wherein the insulator, the insulating silicone rubber and the optical voltage sensing head are all arranged in the transformer shell; one end of the optical fiber is connected with the optical voltage transformer while the other end is led from a through hole in the side wall of the transformer shell and to the electric unit outside the transformer shell; the optical voltage sensing head and the end of the optical fiber connected to the optical voltage sensing head are embedded into the insulating silicone rubber by an silica gel encapsulating technology; the insulator covers the outer part of the insulating silicone rubber by a pouring technology and is filled with the whole inner part of the transformer shell; one end of the conductor electrode is reserved with a wiring terminal for connecting external voltage, and the part, besides the wiring terminal, of the conductor electrode is embedded into the top of the insulator. The transformer provided by the invention is simple in structure, small in size, light in weight, greatly reduced in cost, and high in reliability and safety.

Description

technical field [0001] The invention relates to the technical field of voltage transformers, in particular to an optical voltage transformer and a packaging method thereof. Background technique [0002] Voltage transformer is an important equipment for relay protection and electric energy measurement in power system. It is used to transform the voltage on the transmission line to supply power to measuring instruments and relay protection devices, to measure the voltage, power and electric energy in the transmission line, or to Protect important equipment in the transmission line, such as motors or transformers, when the transmission line fails. The long-term stability, reliability and safety of voltage transformers are closely related to the safe and stable operation of power systems. The optical voltage transformer uses the Pockels effect (Pockels effect), that is, the refractive index of the electro-optic crystal will change relative to the two orthogonal axes under the a...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of cumbersome air-filling sealing process, prone to air leakage and complicated structure of the package shell existing in the existing optical voltage transformer adopting the gas encapsulation structure, as well as the complex insulation structure existing in the solid encapsulation structure, occupying a large space and quality A new type of optical voltage transformer is proposed, which can effectively solve the structural safety problems of the existing optical voltage transformer packaging, and can effectively reduce the volume and weight, with simple structure, good insulation performance, and shielding Excellent effect, flexible application mode, greatly reduced cost, and has the advantages of easy installation, high reliability, high safety and integration

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