Tester for testing SF6 gas discharge decomposition product characteristics

Abstract

The invention discloses a testing system device for testing SF6 gas discharge decomposition product characteristics, which comprises a test transformer, a resistance capacitance divider, a gas discharge device, a single lens reflex, a discharge capacity detecting unit, a gas taking loop and a Fourier infrared spectrometer. Different discharge faults such as pin plate corona discharge, spark discharge, particle discharge and suspension potential discharge can be simulated; the Fourier infrared spectrometer with fast response and high accuracy is utilized to analyze gas decomposition product components and disciplines under different discharge faults; and an optical signal recorded by the single lens reflex and an electric signal recorded by an oscilloscope are combined to extract typical gas and characteristic quantity reflecting the discharge faults, so that a test and theoretical foundation is laid for applying an SF6 gas decomposition product to diagnose the running state of equipment. The testing system device disclosed by the invention has the advantages of simplicity in operation, strictness, practicability, low cost of expansion, accuracy in measurement and large obtained information contents.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis of gas-insulated fully enclosed combined electrical appliances (GIS), and relates to the application of SF 6 The research topic of gas decomposition product detection to analyze and diagnose the operation status of equipment. Background technique [0002] Gas-insulated metal-enclosed switchgear (GIS) has been widely promoted in EHV and UHV power grids due to its compact structure, small footprint, and high reliability. According to the statistics of CIGRE, the annual failure rate of GIS is 0.01-0.02 per station, which is about 10% of the failure rate of conventional equipment. With the large-scale use of GIS, failures and accidents caused by internal insulation materials and installation quality problems are gradually increasing. As one of the most important power equipment in the power grid system, once GIS fails, it will cause serious consequences, and it will directly endanger substati...

AI Technical Summary

Problems solved by technology

[0005] Currently, most studies simply list SF 6 The types of gas decomposition products, neither the typical gas types reflecting faults nor the relationship between defect conditions and typical gas concentrations, nor the relationship between various typical gas concentrations

In addition, the decomposition products have many components, the content is very small and difficult to measure, and the chemical reaction is complicated, which makes SF 6 The chemical reaction process of gas under the action of electric discharge has become a research problem

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