中乌天然气管道A B线阀室自关断保护功能测算分析.pdf

2022 4
protection function of valve chambers along the China-Ukraine natural gas pipelines is based on the uni⁃
Abstract
fied pressure drop rate and delay time setting ( MPa / min, 120 s) of Lineguard controller, which has certain limitations and uncer⁃
tainties. Therefore, based on SPS simulation, the self-shut-off protection function of valve chambers is evaluated, the variation laws of
pipeline pressure drop rate and delay time after leakage events under different leakage aperture, leakage point position and pressure
are obtained, and the potential risk of valve chamber misshutdown due to gas source failure and condition adjustment is quantitatively
analyzed. The results show that at present, the existing setting of protection function can only monitor the leakage events with a leakage
aperture of more than 300 mm, and and the valve chamber settings under different areas and operation conditions need to be further op⁃
timized and research results of this paper can provide reference for the optimal setting of protection function of valve
chambers in long-distance natural gas pipeline.
natural gas pipeline; leakage; valve chamber; self-shut-off protection; pressure drop rate
Key words
林棋,娄晨,徐飞,等 . 中乌天然气管道 A/B 线阀室