Sulfur hexafluoride discharge decomposed gas component analysis system and its usage method

Abstract

A sulfur hexafluoride discharge decomposition gas component analysis system is composed of a pressure adjuster console 1, an insulation transformer 2, a non-blooming test transformer 3, a non-local-discharge protective resistance 4, a capacitor bleeder 5, a sulfur hexafluoride discharge decompose device 6, a non-inductive check resistance 7, a match resistance 8, an oscillometer 9, and a gas spectrometer 10. And the method comprises that (1), using a vacuum pump 18 to vacuum the sulfur hexafluoride discharge decompose device 6, (2), using an inlet needle valve 17 to feed SF6 gas into the sulfur hexafluoride discharge decompose device 6, (3), measuring maximum external test voltage and initial PD voltage, (4), generating PD under different electrodes, (5), collecting gas, (6), analyzing gas components, (7), collecting PD pulse signal wave shape, diagnosing accident and recognizing mode. The invention has wide application in research, teach, academy and industry, used in theory analysis and research of PD online state check of GIS device.

Description

technical field [0001] The present invention relates to sulfur hexafluoride (SF 6 ) gas discharge decomposition, partial discharge experiment and gas component detection, in particular to a sulfur hexafluoride discharge decomposition component analysis system and its application method. Background technique [0002] GIS adopts SF 6 As a gas insulating medium, it has the advantages of high dielectric strength, stable operation, small footprint and small maintenance workload, and is widely used in the construction and renovation of large and medium-sized cities. However, judging from the operation situation in recent years, many problems have appeared in the use of GIS at home and abroad, among which insulation faults are the main ones. Insulation faults generally manifest initially as intermittent partial discharges (PD), which in turn cause SF 6 Gas breaks down. to SF 6 There are corresponding national and international standards for the detection of decomposition gas, ...

AI Technical Summary

Problems solved by technology

However, for GIS internal SF 6 The research on the detection and analysis of discharge decomposition gas is still in its infancy

On the one hand, the use of adsorbents and desiccants, the diffusion effect of decomposed gas in the gas chamber, and the randomness of gas sampling positions in the actual GIS all have adverse effects on the accurate determination of the concentration of decomposed gas components; on the other hand, SF 6 Discharge decomposition gas components are complex, many of which are very unstable, making it difficult for SF 6 The qualitative and quantitative analysis of discharge decomposition gas becomes very difficult

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