Recognition of Protrusion Defect Fault in Gas Insulated Switchgear Base on SF6 Decomposition Product

2018 ◽  
Vol 8 (1) ◽  
pp. 131
Author(s):  
Visa Musa Ibrahim
Keyword(s):  
Preventive Maintenance ◽  
Decomposition Product ◽  
Partial Discharge ◽  
Sulphur Hexafluoride ◽  
Decomposition Products ◽  
Gas Insulated Switchgear ◽  
Product Method ◽  
Ftir Spectrometer ◽  
Sf6 Decomposition ◽  
The Impact

A solid analytic procedure of Gas insulated switchgear condition checking is utilized in this studies as a part of exploration for the detection of sulphur hexafluoride gas (SF6) decomposition by-product because of its high affectability, reliability and anti-electromagnetic obstruction. This is known as chemical decomposition by-product method. A simulated coaxial deterioration chamber was designed and used on the high voltage electrode to re-enact the decomposition of SF6 under the impact of protrusion defect that generates partial discharge in the coaxial chamber at a pressure of 0.2MPa.The chamber is energised at 50kv for the period of 50 hours and the generated partial discharge simulate the decomposition of SF6 gas. The deterioration decomposition products SO2, SOF2, SO2F2, SO2F10, SiF4, CO, C3F8, C2F6 were detected offline by FTIR spectrometer. These deteriorated items and its concentration can be utilized to recognize and distinguish the type and the magnitude of fault in gas insulated switchgear (protrusion fault) before failure occur for the aim of preventive maintenance.

scholarly journals A DFT study on the adsorption of Ga-BNNT to SF6 decomposition products under partial discharge

2019 ◽  
Vol 14 ◽  
pp. 102419 ◽  
Author(s):  
Hai Qian ◽  
Jun Deng ◽  
Haibin Zhou ◽  
Xu Yang ◽  
Wei Chen
Keyword(s):  
Partial Discharge ◽  
Dft Study ◽  
Decomposition Products ◽  
Sf6 Decomposition

The research of temperature properties of photoacoustic spectroscopy detection for SF6 decomposition products in gas insulated switchgear

2015 ◽  
Vol 7 (9) ◽  
pp. 3806-3813 ◽  
Author(s):  
J. Luo ◽  
Y. H. Fang ◽  
Z. X. Su ◽  
D. C. Li ◽  
Y. D. Zhao ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Temperature Correction ◽  
Response Factor ◽  
Decomposition Products ◽  
Impact Mechanism ◽  
Correction Formula ◽  
The Real ◽  
Sf6 Decomposition ◽  
The Impact ◽  
Real Temperature

In this paper, CO was taken as an example to analyze the impact mechanism of temperatures and the temperature correction formula of its response factor was derived. The real temperature properties of SF6 and CO were studied using a non-resonant PA spectroscopy device designed by our team.

Status Review on Gas Insulated Switchgear Partial Discharge Diagnostic Technique for Preventive Maintenance

2017 ◽  
Vol 7 (1) ◽  
pp. 9 ◽  
Author(s):  
Visa Musa Ibrahim ◽  
Zulkurnain Abdul-Malek ◽  
Nor Asiah Muhamad
Keyword(s):  
Preventive Maintenance ◽  
High Reliability ◽  
Partial Discharge ◽  
Diagnostic Technique ◽  
Electrical Energy ◽  
Dielectric Strength ◽  
Diagnostic Techniques ◽  
Vital Role ◽  
Gas Insulated Switchgear ◽  
High Dielectric

<p>Gas insulated switchgear (GIS) plays a vital role in high voltage transmission of electrical energy due to its advantages of high reliability and performance, compact in dimensions and outstanding compatibility with the environment. It uses sulphur hexafluoride gas as its insulant and coolant because of its high dielectric strength and excellent arc quenching ability. Gas insulated switchgear in operation suffers the challenge of its insulation decomposition and eventually failure due to the activities of partial discharge that arouses from defects. This failure is catastrophic and it will lead to entire power out stage that will affect all categories of human activities, so there is a need for Gas insulated switchgear condition monitoring and diagnoses in order to carry out preventive maintenance. This paper reviews diagnostic techniques and methods for Gas insulated switchgear insulation degradation caused by partial discharge for the purpose of carrying out preventive maintenance to avert its failure.</p>

scholarly journals Analysis of Suspended Potential Discharge Defects by SF6 Decomposition Products

2021 ◽  
Vol 898 (1) ◽  
pp. 012009
Author(s):  
Lijun Fu ◽  
Yanling Guan ◽  
Liang Zhang ◽  
Jian Zhang
Keyword(s):  
Reaction Mechanism ◽  
Decomposition Product ◽  
Circuit Breaker ◽  
Normal Operation ◽  
Forming Process ◽  
Decomposition Products ◽  
Iron Aluminum ◽  
Column Type ◽  
Sf6 Decomposition ◽  
Solid Decomposition

Abstract The type and content of SF6 decomposition products are directly related to the type, location and degree of fault. Based on the analysis of the abnormal SF6 gas decomposition product content and discharge type of 126kV Porcelain Column type circuit breaker, the potential fault of the circuit breaker is judged to be suspension potential discharge fault. After disassembling the circuit breaker, it is found that the abnormal phase of the insulation rod is deformed, the pin become thin, and there are solid decomposition products, the sulfides and fluoride, which are mainly composed of iron, aluminum, chromium and manganese, further confirm that the potential fault of the circuit breaker is suspension potential discharge fault. The forming process and reaction mechanism of the suspended potential discharge fault are analyzed. Once the fault occurs, its function will promote the development of the fault. The influence of the suspension potential discharge fault on the performance of the circuit breaker is also analyzed. When the suspension potential discharge fault exists, it will cause the abnormality and even affect the normal operation of the circuit breake.

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