摘要
针对气体绝缘输电线路(gas insulated transmission line,GIL)管廊内绝缘气体泄漏导致有害气体六氟化硫(SF6)扩散复杂分布的问题,提出了一种基于数字孪生技术的全过程仿真风险评估方法。首先,根据苏通GIL管廊的实际工况和通风系统的部署,归纳综合管廊内气体大面积泄漏时的全过程通用排除方案。然后,以SF6气体泄漏的物理过程与数学机理为基础,在虚拟空间中构建管廊的数字孪生模型,并设置了气体泄漏的约束条件。其次,通过模拟孪生空间内SF6大面积泄漏气体的扩散分布,推演排除过程中SF6分布数据并将其可视化。最后,结合各阶段可视化结果,对GIL综合管廊内气体泄漏全过程进行风险评估,从而为制定管廊内的安全撤离方案与实现智能化监控提供参考。
To address the challenges posed by the complex distribution of sulfur hexafluoride(SF6)gas leakage in gas-insulated transmission line(GIL)utility tunnels,this paper proposes a simulation-based risk assessment approach based on digital twin technology.Firstly,a general exclusion plan for large-scale gas leakage is summarized based on the actual working conditions of the Su-Tong GIL utility tunnel and the deployment of the ventilation system.Then,based on the physical process and mathematical mechanism of SF6 gas leakage,a digital twin model of the utility tunnel is constructed in virtual space,and the constraints of gas leakage are set.Secondly,by simulating the diffusion distribution of large-scale SF6 gas leakage in the twin space,the distribution data of SF6 during the exclusion process is deduced and visualized.Finally,combining the visualization results of each stage,a full-process risk assessment of gas leakage in the GIL utility tunnel is carried out,providing a reference for formulating safe evacuation plans and achieving intelligent monitoring in the corridor.
作者
徐长福
赵新冬
梁伟
贺兴
卜艺康
XU Changfu;ZHAO Xindong;LIANG Wei;HE Xing;BU Yikang(State Grid Jiangsu Electric Power Research Institute,Nanjing 211103,China;Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《电力系统保护与控制》
北大核心
2025年第3期160-171,共12页
Power System Protection and Control
基金
国家电网有限公司科技项目资助(JF2023034)。
