System and method for online monitoring SO2 in SF6 electrical equipment through ultraviolet spectrum

Abstract

The invention discloses a system and a method for online monitoring SO2 component in SF6 electrical equipment through ultraviolet spectrum. The system mainly comprises a gas sampling tank, a lower computer control module, an ultraviolet spectrograph, a deuterium lamp light source, a vacuum pump, to-be-tested SF6 electrical equipment, and an upper computer data processing and state analysis module. The lower computer control module controls the operation of an electromagnetic valve, so as to lead sample gas into the gas sampling tank from the to-be-tested SF6 electric equipment, and the ultraviolet spectrograph and the deuterium lamp light source are matched to obtain sample gas spectrum signals and transmit the sample gas spectrum signals to the upper computer data processing and state analysis module to carry out the postprocessing of the program, and a testing result is outputted after judging whether discharge derivate SO2 exists in the SF6 electrical equipment. According to the system and method, an ultraviolet spectrum method is utilized to monitor SO2 component in the equipment in real time, and the problem that the SF6 electrical equipment cannot be monitored online is solved. The system has the characteristics of small size, low cost, easy installation and the like, thereby being suitable for field complex test requirements.

Description

technical field [0001] The present invention relates to SF 6 The field of discharge fault detection of electrical equipment, especially related to the online monitoring of SF by ultraviolet spectroscopy 6 SO in electrical equipment 2 Component systems and methods. Background technique [0002] SF 6 The gas is very stable and has excellent insulation and arc extinguishing properties. It is by far the most ideal insulation and arc extinguishing medium, and is widely used in gas-insulated combined electrical appliances (GIS). However SF 6 Electrical equipment under normal operating conditions, SF 6 The gas will still decompose under the action of arc, spark and corona discharge, and the generated ions and ion clusters will react with trace moisture, gas impurities, metal electrode materials and solid insulating materials in the GIS to form complex derivatives. The existence of these derivatives will cause the corrosion of the metal parts inside the equipment, the deterior...

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Problems solved by technology

Due to the large volume of equipment required by these methods, they cannot be applied in the field, so the sampling interval is long, which is not conducive to timely detection of equipment faults and defects

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