Gas sensor

Abstract

The present invention discloses a gas sensor, which comprises a housing having an inner cavity, a temperature and humidity detection device, a composite oil-gas separation membrane and a gas-sensitive element, wherein the temperature and humidity detection device, the composite oil-gas separation membrane and the gas-sensitive element are arranged inside the inner cavity, the lower end of the housing is provided for connecting with an oil supply electrical device, the composite oil-gas separation membrane comprises a body membrane and a porous metal sintering sheet arranged on the body membrane, the composite oil-gas separation membrane is arranged inside the inner cavity of the housing through the body membrane lower end toward the housing, the gas-sensitive element is positioned on one side of the porous metal sintering sheet of the composite oil-gas separation membrane, and the temperature and humidity detection device is positioned on one side of the body membrane of the composite oil-gas separation membrane. According to the present invention, the gas sensor has characteristics of small volume, simple installation, low cost and the like; and the trace moisture, the oil temperature and the fault gas content in insulating oil can be concurrently detected, real-time compensation correction can be performed on the detection result according to the insulating oil temperature detected by the temperature and humidity detection device, the problem of inaccurate detection can be solved, and the detection precision of the gas sensor can be increased.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of oil-filled electrical equipment, in particular to a gas sensor for on-line accurate detection of trace moisture, oil temperature and fault gas content in insulating oil. Background technique [0002] The reliable and safe operation of oil-filled electrical equipment such as transformers, reactors, transformers and bushings is the key to high-efficiency power generation, transmission and distribution. When mechanical faults, thermal faults, discharge faults or oil and paper aging occur inside the equipment, various characteristic gases will be generated and dissolved in the oil. Timely and effective detection of faulty gas content in oil can greatly reduce the occurrence of accidents. [0003] For the content of dissolved gas in insulating oil, it can generally be completed by testing the fuel cell gas sensor. A fuel cell is a device that directly converts chemical energy (gas or li...

AI Technical Summary

Problems solved by technology

Although the monitoring of moisture in oil is very important for the condition monitoring of oil-filled electrical equipment such as transformers, the general detection method on the market is to add a temperature and humidity detection module in addition to the faulty gas detection module. Large size, high cost, complex installation, large amount of maintenance and other defects, do not meet the current requirements for high integration and high intelligence of smart grid

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