| Autor: |
PANG Lele, YANG Wenyong, LI Pengfei, GUO Xiaofei, GAO Peng, LIANG Rui |
| Jazyk: |
čínština |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
电力工程技术, Vol 41, Iss 3, Pp 244-251 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2096-3203 |
| DOI: |
10.12158/j.2096-3203.2022.03.030 |
| Popis: |
SF 6/N 2 gas mixture is considered as one of the most promising gases to replace SF 6 because of its good insulation performance and environmental benefits. However,there is a lack of research on the mixing ratio of SF 6/N 2 gas mixture in different conditions. Under the premise of ensuring the insulation level of gas-insulated transmission lines (GIL),a multi-physical field coupling calculation model is established. From the perspective of heat characteristics of gas mixture,the relationship between SF 6/N 2 mixing ratio and GIL temperature rise under different insulating gas pressure,load current and ambient temperature is analyzed to determine the appropriate SF 6/N 2 mixture ratio under different conditions. The results show that there is a negative correlation between the insulation gas pressure (or the SF 6 content) and GIL temperature rise at the same pressure. The SF 6 content is suggested to be in the range of 40%~60% when the load current exceeds 3 kA for a long period of time,40%~70% when the equipment is running in the middle and low latitudes,and 30%~40% when the equipment is in the high latitudes. In addition,considering the safety margin,the insulation and temperature rise requirements of GIL can be met when SF 6 content is not less than 70% of the recommended value. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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