Automatic start-up device and start-up method of transformer oil and gas gas chromatography detector

Abstract

The invention relates to an automatic startup device for a transformer oil and gas gas chromatography detector and a startup method thereof, comprising a gas chromatography detector, a controller, an alarm, a high-pressure carrier gas storage cylinder, a high-pressure gas storage cylinder, and a high-pressure gas supporting gas storage The gas chromatograph detector is provided with a sample inlet, a carrier gas inlet, a gas inlet, and an auxiliary gas inlet. The high-pressure carrier gas storage bottle is connected to the carrier gas inlet through a carrier gas pipeline. The gas storage cylinder is connected to the gas inlet through the gas pipeline, and the high-pressure auxiliary gas storage cylinder is connected to the auxiliary gas inlet through the auxiliary gas pipeline. The main valve of the gas storage cylinder and the pressure reducing valve are arranged on the gas outlet of the gas storage cylinder, and the gas chromatographic detector and the alarm are all electrically connected to the controller. The invention can avoid the traditional gas chromatograph used for transformer oil detection. The possible damage and test error ensure the safe use of the gas chromatograph and the accuracy of the test data.

Description

technical field [0001] The invention relates to an automatic start-up device and a start-up method of a transformer oil and gas gas chromatography detector. Background technique [0002] In the operation of the power high-voltage transformer of the power system, when overheating and discharge faults occur inside the power transformer, the heat generated by the fault will thermally decompose the transformer oil around the fault point to produce a variety of low-molecular-weight hydrocarbon gases and hydrogen, as well as carbon monoxide, carbon dioxide, Nitrogen, oxygen and other inorganic gases, among which: methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide, carbon dioxide and other seven characteristic gases can reflect the situation of overheating and discharge failure inside the power transformer, so through the gas chromatograph Detecting the content and composition ratio of the above seven characteristic gases dissolved in the operating transformer oil can ...

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Problems solved by technology

The currently used gas chromatographs used to detect dissolved gases in transformer oil do not have a device that automatically protects the gas source before the chromatograph is turned on, and then automatically turns on the device. This may cause the chromatograph to be turned on before the working gas source is turned on, resulting in The thermal guide wire of the thermal conductivity detector of the chromatograph is blown or other damages to the chromatograph are caused, or even a serious accident of burning. If the working gas source is not turned on in sequence, it will cause serious deviations in the test data. For example, the hydrogen gas is opened first, Opening the carrier gas later will cause the hydrogen gas to stay in the dead corner of the injector first, and the sample gas will enter the thermal conductivity detector with the hydrogen gas at the beginning of the sample injection, resulting in serious errors in the hydrogen content of the sample

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