Device and method for measuring gas content of insulating oil

Abstract

The invention discloses a device for measuring gas content of insulating oil. The device comprises an oil quantitative container, a vacuum degree measuring device and an oil pumping device, wherein an oil inlet is formed in a bottom end of the oil quantitative container; an oil outlet is formed in a top end of the oil quantitative container; the vacuum degree measuring device is connected with the oil quantitative container; valves are arranged between the water inlet, the oil outlet as well as the vacuum degree measuring device and the oil quantitative container; the oil pumping device comprises an oil pumping container and a piston arranged in the oil pumping container; an oil discharge outlet is formed in one end of the oil pumping container, and the same end is connected with the oil quantitative container; the other end of the oil pumping container is provided with an opening communicating with the atmospheric air; valves are arranged between the oil discharge outlet as well as the oil quantitative container and the oil pumping container; a side wall of the oil pumping container is provided with a plurality of volume markers. Meanwhile, the invention discloses a measuring method of the device. By adopting the device and the method, absolute vacuum of an initial state is realized through movement of the piston, and measurement of the gas content of the insulating oil is realized without pre-vacuuming, so that a test flow is simplified, and test time is shortened.

Description

technical field [0001] The invention relates to a measuring device and method for gas content in insulating oil, in particular to a vacuum differential pressure measuring device and method for measuring gas content in insulating oil without pre-vacuumizing, and belongs to the technical field of power system detection. Background technique [0002] Insulating oil has excellent insulation, heat dissipation and cooling, and arc extinguishing functions, and is widely used in electrical equipment such as transformers, reactors, and transformers. The gas dissolved in the insulating oil will be ionized under the action of high field strength. When the temperature and pressure drop suddenly, bubbles will be formed and the bubbles will be pulled into a long body. It is very easy for the gas to collide and dissociate, causing breakdown and endangering the safe operation of the equipment. , so the gas content in the insulating oil of oil-filled electrical equipment must be strictly con...

AI Technical Summary

Problems solved by technology

During the detection process of the gas content in the insulating oil, any steps that may come into contact with the air will cause errors. In the past, the insulating oil had to be taken back from the substation site to the laboratory, and then chromatographic or pre-vacuumized vacuum differential pressure method During testing, sample collection and transportation, the air is easy to exchange with the gas in the insulating oil, which affects the accuracy of the test, and cannot be directly measured at the substation site, the testing process is complicated, and it takes a long time to transport oil samples

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