Sulfur hexafluoride electrical equipment integrated detector and application method thereof

Abstract

The invention relates to a sulfur hexafluoride electrical equipment integrated detector and an application method thereof. Two detection items, i.e., partial discharge and product decomposition are integrally combined so that the accuracy of detecting internal faults is substantially improved. The detector comprises a gas path provided with an air inlet and an air exhaust opening. The gas path after the air inlet is provided with a needle type valve; the gas path after the needle type valve is successively provided with an electrochemical sensor and a flowmeter; the output end of the electrochemical sensor is connected with a decomposition product signal processing unit; the decomposition product signal processing unit is connected with an MCU; the gas path is provided with a gas pump which is started by the MCU when detection data exceeds a normal value; and the MCU is also connected with a partial discharge signal processing unit, an alarm unit, a display and a data storage unit. The detector and the application method, provided by the invention, has the advantages of novel conception, simple structure, accurate and rapid testing, convenient use, and positive effects on sulfur hexafluoride electrical equipment in improving safe and economic operation, thereby having wide popularization and application prospects.

Description

technical field [0001] The patent of the present invention relates to electrical equipment testing instruments, which reflect sulfur hexafluoride (hereinafter referred to as SF 6 ) A detector for comprehensive diagnosis of equipment status by partial discharge of electrical equipment and cracking of internal insulating materials. Background technique [0002] SF 6 The gas has excellent chemical stability and electrical properties, so it has been widely used in electrical equipment since the 1980s, and has played a very good role in the safe and economical operation of the power system. However, there are still some deficiencies in the design, material, manufacturing, installation process, and operation and maintenance of electrical equipment, and the existing detection methods are difficult to detect local insulation hazards, and the products cannot be detected before they leave the factory and are put into use. However, after being put into operation, these defects conti...

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Problems solved by technology

[0003] High sensitivity to partial discharge, able to detect SF 6 Partial discharge fault inside the electrical equipment, but it is difficult to determine the fault location, and the method is greatly disturbed by the field, so the accuracy is not very high

And by the SF 6 SO in gas 2 、H 2 S, CO and H 2 The detection of other decomposition products can accurately determine the nature and location of the fault, but the detection sensitivity of this method is not very high

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