A Calibration System for Accuracy of Dissolved Gas Detection Instruments in Oil

Abstract

The invention belongs to the technical field of research and application of on-line monitoring of high-voltage electrical equipment, and particularly relates to calibration of the monitoring effect of gas dissolved in oil of a transformer. The invention particularly relates to a system for calibrating the accuracy of an instrument for detecting the gas dissolved in oil. The system comprises a power supply, an on-line transformer monitoring device, a gas source, a gas sample generator, an oil distribution source, an oil sample generator, a small-sized air booster pump, an oil and gas detection instrument, an industrial personal computer and a waste oil cylinder, wherein the oil and gas detection instrument comprises an oil and gas mixing chamber, and a pressure sensor, a temperature sensor and a heater which are arranged in the oil and gas mixing chamber. The system is flexible in configuration, accurate in calculation and convenient to maintain, and can be used for calculating the concentrations of all components of the gas dissolved in oil by utilizing a le chatelier principle according to gas inlet quantity, oil inlet quantity and the temperature and pressure of the oil and gas mixing chamber, so that the inspection period is shortened; after the star topology structure arrangement way is adopted, the normal operation of other monitoring loops can not be influenced in the inspection process.

Description

technical field [0001] The invention belongs to the technical field of research and application of on-line monitoring of high-voltage electrical equipment, in particular to the calibration of the monitoring effect of dissolved gas in transformer oil, and in particular to a calibration system for the precision of an oil-dissolved gas detection instrument. Background technique [0002] Insulating oil is the key medium inside the transformer. When the transformer has an electrical or thermal fault, it will be accompanied by a small amount of active hydrogen atoms and unstable hydrocarbon free radicals, and under complex chemical reactions, they will be combined to form hydrogen and low molecular weight. Hydrocarbon gases, such as methane, ethane, ethylene, acetylene, etc. Therefore, latent faults inside the transformer can be found as early as possible by monitoring and analyzing the dissolved gas in the oil. [0003] In recent years, on-line monitoring of dissolved gas in tra...

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Problems solved by technology

[0005] (2) The online monitoring device is deployed on the substation site, and the configuration and application environment of the standard oil need to be in the laboratory, which is not conducive to the promotion of the calibration of the monitoring device in operation

[0006] The above problems lead to isolated detection devices in the prior art products, which hinders the on-site calibration of online monitoring devices.

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