Automatic starting device and method for gas chromatographic detector for transformer oil

Abstract

The invention relates to an automatic starting device and method for a gas chromatographic detector for transformer oil. The automatic starting device comprises the gas chromatographic detector, a controller, an alarm, a high pressure carrier gas cylinder, a high pressure fuel gas cylinder and a high pressure combustion-supporting gas cylinder; the gas chromatographic detector is provided with a sample inlet, a carrier gas inlet, a fuel gas inlet and a combustion-supporting gas inlet; the high pressure carrier gas cylinder is connected with the carrier gas inlet through a pipeline; the high pressure fuel gas cylinder is connected with the fuel gas inlet through a pipeline; the high pressure combustion-supporting gas cylinder is connected with the combustion-supporting gas inlet through a pipeline; a gas cylinder main valve and a reducing valve are arranged on a gas outlet of each of the high pressure carrier gas cylinder, the high pressure fuel gas cylinder and the high pressure combustion-supporting gas cylinder; and the gas chromatographic detector and the alarm are both electrically connected with the controller. The device and the method avoid the damage and the experiment error possibly caused by the starting of the traditional gas chromatographic detector used for detection of the transformer oil, and the safe use of the gas chromatographic detector and the accuracy of the experiment data are guaranteed.

Description

technical field [0001] The invention relates to an automatic start-up device and a start-up method for a transformer oil gas chromatography detector. Background technique [0002] During the operation of power high-voltage transformers in power systems, 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 hydrocarbon gases and hydrogen as well as carbon monoxide, carbon dioxide, Nitrogen, oxygen and other inorganic gases, among them: methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide, carbon dioxide and other seven characteristic gases can reflect the internal overheating and discharge failure of 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 indirectly understand the ...

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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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