Transformer heavy gas protection system based on fiber bragg grating principle

Abstract

The invention particularly relates to a transformer heavy gas protection system based on a fiber bragg grating principle. The invention belongs to the technical field of transformer gas detection andprotection. The transformer heavy gas protection device can accurately complete real-time monitoring of the oil speed. The adopted scheme is as follows: a packaging shell is filled with transformer oil; a cantilever beam penetrates through the packaging shell, the lower end of the cantilever beam is submerged in transformer oil, strip-shaped grooves are formed in the two side plate faces of the cantilever beam, an optical fiber A and an optical fiber B are symmetrically arranged in the corresponding strip-shaped grooves, the lower end of the optical fiber A is connected with an optical fiber grating A, and the lower end of the optical fiber B is connected with an optical fiber grating B which is symmetrically fixed; the optical fiber A and the optical fiber B are connected with a fiber bragg grating demodulator; a monitoring background, a protection device and the fiber bragg grating demodulator are electrically connected in sequence; and according to the invention, the real-time monitoring of the oil speed can be accurately completed.

Description

technical field [0001] The invention belongs to the technical field of transformer gas detection and protection, and in particular relates to a transformer heavy gas protection system based on the principle of optical fiber grating. Background technique [0002] After a fault occurs inside the transformer oil tank, the short-circuit current will generate an arc. The arc breaks down transformer oil and other insulating materials, producing gaseous gases that cause oil to flow in the tank. The more severe the fault, the more gas produced and the faster the oil flow. Buchholz relay is a protection device applied to transformers, which is installed in the pipeline between the transformer oil conservator and the oil tank. After the gas relay operates, it will send out an alarm signal or start a protection action in time. [0003] Gas protection has two functions of light gas and heavy gas. Traditional heavy gas protection utilizes the principle of impacting the gas relay baff...

AI Technical Summary

Problems solved by technology

The following problems exist in heavy gas protection in actual use: (1) The flow rate of transformer oil cannot be detected in real time, and the development degree of transformer internal faults cannot be predicted in advance

(2) The baffle is a mechanical rotating part. The oil sludge generated during the long-term operation of the transformer will adhere to the baffle, which is prone to hidden dangers such as the baffle turning stuck, the rotation stroke not in place, and the contact contact being poor, which makes the heavy gas relay unable to start reliably.

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