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Published Online:19 November 2025,
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陈宏刚,王永奇,樊新鸿等.GIS设备微泄漏条件下水组分增长机理的数值研究[J].高压电器,
CHEN Honggang,WANG Yongqi,FAN Xinhong,et al.Numerical Study on Water Fraction Growth Mechanism Under Icroleakage Conditions in GIS Equipment[J].High Voltage Apparatus,
GIS设备SF
6
气体泄漏往往伴随内部水组分含量上升,对电力设备的安全稳定运行带来了巨大的隐患。为了揭示微小泄漏与水分增长二者伴生发生的物理机理,文中以国网甘肃某GIS设备为对象,开展了瞬态大时间跨度CFD模拟。模拟中建立GIS罐体、漏孔及外侧空气远场模型,使用Mixture多相流模型,获得了泄漏过程中不同时刻下的流场分布。结果表明,漏孔外侧SF
6
羽流会造成局部低温,引发空气中水蒸气凝结,液相水在内部压力下降至0.48 MPa附近时会进入GIS罐体内部,昼夜温度交替会加剧该现象的发生。
Leakage of SF
6
gas in GIS equipment is often accompanied by an increase in water fraction,which poses a great potential danger to the safe and stable operation of electric equipment. In order to reveal the physical mechanism of the concomitant occurrence of micro leakage a
nd water growth,this paper carries out transient large time span CFD simulation with a GIS apparatus of State Grid Gansu as the object. In the simulation,the GIS tank,the leakage orifice and the farfield of outer atmosphere are included. The flow field distributions at different moments during the leakage process are obtained by using the Mixture multiphase flow model. The results show that the SF
6
plume on the outside of the leakage hole causes local low temperature,which triggers the condensation of water vapor in the air,and the liquid-phase water enters the GIS tank when the internal pressure drops to near 0.48 MPa,and the alternation of day and night temperatures exacerbate the occurrence of this phenomenon.
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