Nondestructive online monitoring method and device based on spectrum method

Abstract

The invention belongs to the technical field of high-voltage electrical equipment, and particularly relates to a nondestructive online monitoring method and device based on a spectrum method. The device comprises a gas inlet, a first electromagnetic valve, a pressure reducing valve, an SO2 fluorescence detection unit, a CO infrared absorption detection unit, a CF4 infrared absorption detection unit, a first pressure sensor, a flow meter, a regulating valve, a second electromagnetic valve and a collecting tank which are sequentially connected in series through a pipeline, one end of the third electromagnetic valve is communicated with the first electromagnetic valve through a pipeline, and the other end of the third electromagnetic valve is communicated with the rear end of the second electromagnetic valve through a pipeline; the first pressure sensor and the temperature sensor are connected to the upper portion of the collecting tank, and the temperature control unit is connected to the outer wall of the collecting tank. The gas chamber monitoring device has the characteristics of simple structure and capability of flexibly monitoring different gas chambers on line. The concentration of the SF6 decomposition product is detected in a stable normal-pressure environment by adopting a spectrum method, the insulating property of the insulating gas in the gas chamber is ensured not to be reduced, the gas to be detected is free of pollution and loss, and the sensitivity is relatively high.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical equipment, and in particular relates to a nondestructive online monitoring method and device based on spectroscopy. Background technique [0002] SF 6 Gas has excellent insulating properties and is widely used in high-voltage electrical equipment. SF in action 6 Due to various internal defects of electrical equipment during manufacture, installation and operation, discharges such as arcing, sparking, corona or partial discharge, and overheating failures may occur, resulting in SF 6 The gas is decomposed to generate various gas components, mainly SF 4 , SOF 2 , SO 2 F 2 , SOF 4 , SO 2 , CO, CF 4 , HF and CF 4 Wait. For electrical equipment in operation, detect SF 6 Gas decomposition products are one of the important methods for fault diagnosis of electrical equipment. Compared with other methods, its main advantage is good anti-interference, which is suitable for on-site...

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Problems solved by technology

[0006] Aiming at the shortcomings of the above-mentioned prior art, such as the detection process of electrochemical sensors, which causes impurities to be mixed in and the problem of using a pump as a power unit to refill the gas, it is easy to mix in impurities such as oil and gas. The present invention provides a method based on spectroscopy. The purpose of the invention is to provide a non-destructive online monitoring method and device with no pollution and loss to the gas to be measured, and a high-sensitivity online monitoring method and device.

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