Sampling system and processing method for gas chromatograph

Abstract

The invention discloses a sampling system and a processing method for a gas chromatograph. The sampling system comprises a control system, a reversing device, sampling interfaces, tail gas interfaces, carrier gas interfaces, quantitative loop groups and chromatographic columns, wherein each sampling gas path is composed of a carrier gas interface, a quantitative loop group and a chromatographic column. When tested samples are to be injected, each gas feeding path is formed by connecting a sampling interface, a quantitative loop group and a tail gas interface together through the reversing device, so that the tested samples are synchronously injected into all quantitative loop groups through the gas feeding path; when the tested samples are analyzed, the tested samples in the quantitative loop group in each sampling gas path are injected into the chromatographic column through the carrier gas interface to be analyzed. By utilizing the sampling system and the processing method, the simultaneity and the precision in sampling of the tested samples are ensured, the problem of artificial interface factors in artificial sampling or respective sampling in two ways is avoided, and the precision and the reliability of a gas chromatograph used for detecting data of the tested samples are further improved.

Description

Technical field [0001] The invention relates to the technical field of on-line monitoring of electric power systems, and more specifically, to a gas chromatograph sampling system and processing method. Background technique [0002] Gas-insulated combined electrical equipment is one of the important equipment in the power system, and is widely used in the construction of urban substations. If it fails, it will cause huge losses. However, in the process of manufacturing, assembly and operation, some latent insulation defects left behind often cause different degrees of partial discharges inside the gas-insulated combined electrical appliances, and the active gas generated by partial discharges will accelerate insulation aging and metal surface corrosion. Eventually cause the gas insulated combined electrical appliance to malfunction. Therefore, it has become an important task in the power system to accurately judge and eliminate the partial discharge in the gas-insulated combined ...

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Problems solved by technology

[0005] In view of the above problems, the present invention provides a gas chromatograph sampling system and processing method to solve the problem that the gas chromatograph operating in parallel with multiple chromatographic columns in the prior art adopts the method of separately injecting the tested samples, which will lead to accurate detection data. The problem of low accuracy and high error rate

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