High-concentration vacuum oil-gas separation device and method for online monitoring transformer oil

Abstract

The invention relates to a high-concentration vacuum oil-gas separation device and method for online monitoring transformer oil. The high-concentration vacuum oil-gas separation device is provided with a quantification chamber, a gas well, an oil well, a degassing chamber, a gas collection chamber, a quantification pipe, an anti-vacuum gas pump, a driving motor and oil and gas pipelines, wherein a gas path part of a vacuum degassing machine is formed by the gas collection chamber, the anti-vacuum gas pump and the quantification pipe; the lower end of the quantification chamber is connected with an oil outlet of a transformer oil tank and the degassing chamber respectively and the upper end of the quantification chamber is connected with the gas well; the upper end of the gas well is connected with the gas collection chamber through a gas pipeline and the lower end of the gas well is connected to the upper end of the quantification chamber and the upper end of the oil well; the lower end of the oil well is connected with the degassing chamber and an oil inlet of the transformer oil tank through two branch pipelines respectively; the degassing chamber and the gas collection chamber are separated through a piston and the driving motor is connected with the piston; a gas inlet of the anti-vacuum gas pump is connected with the gas collection chamber and a gas outlet of the anti-vacuum gas pump is connected with the quantification pipe. According to the high-concentration vacuum oil-gas separation device and method provided by the invention, degassing is finished by adopting a vacuum degassing principle and real-time online analysis of dissolved gas in the transformer oil is facilitated; a manner of degassing and collecting gas for a plurality of times is adopted, so that the degassing efficiency is high and the repeatability is good.

Description

technical field [0001] The invention relates to transformer oil monitoring technology, in particular to a transformer oil on-line monitoring high-concentration vacuum oil-gas separation device and method. Background technique [0002] Practice has proved that the gas test technology in transformer oil can effectively predict the latent faults inside the transformer, so it is listed in the primary position of the preventive test of power transformers and reactors in the preventive test procedures of power equipment. The gas online monitoring device in transformer oil can fully automatically analyze the content of various components of dissolved gas in the oil online, which solves the problems of long detection period, complicated operation, high time-consuming and high cost of traditional oil testing methods, and has been widely used in power systems. widely used. [0003] The on-line monitoring device for gas in transformer oil needs to separate the oil and gas from the tra...

AI Technical Summary

Problems solved by technology

In addition, long-term immersion changes the permeability of the membrane, resulting in measurement errors; the headspace degassing method uses the principle of "oil-gas replacement (also called extraction)", which is greatly affected by the environment, has poor repeatability and stability, and there are oil samples. Pollution, carrier gas consumption, trap failure, service life and other issues; traditional vacuum degassing uses vacuum pumps or mechanical pistons to obtain vacuum to separate oil and gas

However, the traditional vacuum degassing can only use a small part of the released gas as the sample gas, and there is still the problem of gas back-melting, which eventually leads to a low gas utilization rate.

In addition, the structure of this method is complex, the production cost is high, the failure rate is high, and the actual application effect is not good.

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