Method for diagnosing fault of GIS (geographic information system) equipment with multicomponent gas on basis of PDHID (pulsed discharge helium ionization detector)

Abstract

The invention discloses a method for diagnosing a fault of GIS (geographic information system) equipment with multicomponent gas on the basis of a PDHID (pulsed discharge helium ionization detector). According to the method, qualitative and quantitative analysis of multicomponent foreign gas in SF6 gas and data storage are completed, whether the GIS equipment has a fault is determined according to test data, and if the GIS equipment has the fault, the type and the degree of the fault are analyzed and judged; whether the fault of the GIS equipment is involved with solid insulation in the GIS equipment is diagnosed, the location and the development trend of the fault are judged, a treatment suggestion for the GIS equipment is proposed, and an GIS equipment diagnosis result is simulated by computer 3D animation. The method is based on the PDHID technology, SF6 gas chromatography, computer software technology and the like are comprehensively applied, the fault of the GIS equipment is studied according to change of concentration of 15 types of foreign gas, fault diagnosis of the GIS equipment is changed from an invisible black box type form to a visible and direct display form, so that judgment of the equipment fault is more facilitated, and timely treatment is facilitated.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a fault diagnosis method for GIS equipment based on PDHID multi-component gas. Background technique [0002] SF 6 The gas has good electrical insulation performance and arc suppression performance, and is widely used in the primary equipment of power supply substation. Its chemical properties are extremely stable, and it basically does not decompose under the condition of equipment operation. 6 Under the action of electric arc, electric spark and partial discharge, etc., it will decompose and produce low-fluorine compounds. Low fluorine compounds are active in chemical properties, and can undergo a series of complex reactions with electrode materials, insulating materials, moisture and air in electrical equipment to generate a variety of compounds, SF 6 Electrical equipment failure gas may contain HF, H 2 S, SO 2 、SOF 2 , SO 2 f 2 , S 2 OF 10 、CF 4 、C 3 f 8 , CO 2 ...

AI Technical Summary

Problems solved by technology

Low fluorine compounds are chemically active and can undergo a series of complex reactions with electrode materials, insulating materials, moisture and air in electrical equipment to generate a variety of compounds, SF 6 Electrical equipment failure gas may contain HF, H 2 S, SO 2 、SOF 2 , SO 2 f 2 , S 2 OF 10 、CF 4 、C 3 f 8 , CO 2 , CO and other components, but the existing technology can only detect 4 of them, and the detection of substation primary SF 6 All components of the gas inside the equipment have limitations and cannot be accurately and timely in SF 6 Make a diagnosis during the latent period of primary substation equipment failure, and take early measures to prevent the occurrence of electrical equipment failure

[0003] At present, the various detection methods commonly used in China have the following limitations: 1) The electrochemical method has the limitations of instrument zero drift, poor instrument stability, and few response components; 2) Infrared spectroscopy has mutual interference, and the detection sensitivity is difficult to meet the latency. The limitation of fault gas detection; 3) The sensitivity of the gas chromatography thermal conductivity detector is not high, the response of the flame detector is nonlinear, and the response components are few. It has been investigated and understood that foreign countries began to study as early as the 2000s, and many domestic researches have been conducted in recent years Institutions conduct research, but the technology is immature and has not been widely used in the market