Correlation characteristics between DC partial discharge quantity and SF6 decomposition components under the needle-plate electrode
| Autor: | She Xin, Xiaodian Li, Nian Tang, Li Li, Ju Tang, Fuping Zeng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Chemistry 020208 electrical & electronic engineering Analytical chemistry 02 engineering and technology 01 natural sciences Decomposition Sulfur hexafluoride Metal chemistry.chemical_compound Plate electrode Electrical equipment visual_art 0103 physical sciences Electrode Partial discharge 0202 electrical engineering electronic engineering information engineering Calibration visual_art.visual_art_medium |
| Zdroj: | 2017 1st International Conference on Electrical Materials and Power Equipment (ICEMPE). |
| DOI: | 10.1109/icempe.2017.7982109 |
| Popis: | In order to study the relationship between SF 6 gas decomposition components and the strength of PD caused by the metal protrusions defect inside the DC gas insulated electrical equipment, the DC SF 6 PD decomposition experiment was carried out for 96h under different discharge quantity in this paper, using the needle plate electrode to simulate the metal protrusion defect. The DC PD quantity was detected by the pulse current method. The paper obtained the growth regularity of SF 6 decomposition components under different DC PD quantity. The results show that the stable decomposition components of SF 6 under the negative DC PD include CF 4 , CO 2 , SO 2 F 2 , SOF 2 , SO 2 and so on. The generation amount relationship between the five gas compositions is CF 4 2 2 2 F 2 2 . SO 2 F 2 and SOF 2 are the main decomposition products of SF 6 under DC PD, the content of which is much higher than the other three. The DC PD quantity affects the concentration of these products significantly. The concentration of CO 2 , SO 2 F 2 , SOF 2 correlates well with Q sec . The concentration of these components increases continuously with the discharge time under the different Q sec . The generation speed γ m of SO 2 F 2 , SOF 2 and (SO 2 F 2 +SOF 2 +SO 2 ) linearly increases with Q sec roughly, which can be the characteristics of DC PD quantity. |
| Databáze: | OpenAIRE |
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