Dissolved gas in transformer oil on-line monitoring device detection system automatic calibration device

Abstract

The invention discloses an automatic calibration device for a detection system of a device used for monitoring dissolved gas in transformer oil online. The automatic calibration device comprises a standard gas sampling system, a gas chromatograph and an automatic calibration system; the standard gas sampling system is communicated with the gas chromatograph so as to acquire the efflux time of each component of standard gas and a standard gas peak; and the automatic calibration system corrects the retention time of each component in an online monitoring device according to the efflux time of each component of the standard gas, calculates a correction factor according to the relationship between the standard gas peak and standard gas concentration and corrects the correction factor of the online monitoring device. The automatic calibration device disclosed by the invention has the advantages that the peak appearance time of the standard gas is utilized for automatically correcting the retention time of each component; according to the relationship between the standard gas peak and the standard gas concentration, the correction factor is calculated, and the correction factor is automatically corrected, so that real-time calibration on the sensitivity of a detector, the column efficiency of a chromatographic column and the flow rate change of carrier gas is realized, manual inspection does not need to be carried out, and manpower and material resources are saved.

Description

technical field [0001] The invention relates to the field of on-line monitoring of dissolved gas in transformer oil, in particular to a calibration method for an on-line monitoring device of dissolved gas in transformer oil. Background technique [0002] The on-line monitoring device for dissolved gas in transformer oil is a device for real-time monitoring of changes in the content of dissolved gas components in transformer oil. Through real-time intelligent monitoring, latent faults in transformers can be found and tracked in time, and the operating status of equipment can be monitored according to the expert diagnosis system. Carry out diagnosis and fault alarm, effectively reduce the operation and maintenance management cost of substations, and improve the technical level of operation and maintenance management. [0003] The on-line monitoring device for dissolved gas in transformer oil has large deviations in the detection results during operation. After analysis, the im...

AI Technical Summary

Problems solved by technology

Portable gas chromatograph and other auxiliary equipment need to be carried during on-site inspection, and the operation process is complicated

[0006] (3) On-site inspections require technical personnel from equipment manufacturers, operation and maintenance units, etc., consuming a lot of manpower and material resources

[0007] (4) The test is only a one-time test of the performance of the instrument, and cannot realize real-time monitoring and automatic calibration of the reliability of the test performance of the equipment

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