摘要
城市供电系统和燃气系统(简称“电-气系统”)是生命线系统的重要组成部分,地震作用下系统内结构和设备等设施受到不同程度的破坏,会导致电-气系统服务功能下降或丧失。文中基于非一致地震动场和系统元件地震易损性模型,提出了电-气系统抗震连通可靠性评估模型。首先,根据地震动参数衰减关系生成空间非一致地震动场,结合电-气系统主要元件地震易损性模型,计算空间地震动场下不同系统元件的失效概率;其次,为考虑元件地震破坏的不确定性,利用Monte Carlo方法模拟地震对系统元件造成的破坏,并通过修改系统网络拓扑的邻接矩阵来反映元件失效。考虑燃气门站邻近的供电节点失效导致的燃气系统源点故障,以及发电厂邻近的供气节点失效导致的供电系统源点故障,建立了双向耦合系统的分析模型;最后,通过IEEE30供电系统与47节点燃气系统对该框架进行了验证。研究结果表明:地震动场空间变异性对系统抗震性能影响显著,相较于一致地震动场,空间地震动场中供电系统和燃气系统连通可靠度分别下降了20.2%和18.7%。电-气系统双向耦合中,供电系统和燃气系统的连通可靠度分别下降了9.4%和22.1%;空间地震动场中,供电系统元件的易损性大并且系统抗震连通可靠度较低,供电系统对燃气系统的影响更大。
Urban power and gas systems(power-gas systems)are crucial components of lifeline infrastructure.Seismic events can cause varying degrees of damage to structures,equipment,and facilities within these systems,potentially leading to a reduction or loss of service functionality.This paper presents a model for assessing the seismic connectivity reliability of power-gas systems,based on non-uniform seismic ground motions and seismic vulnerability models of system components.First,a spatially non-uniform seismic ground motion field is generated using the attenuation relationships of seismic parameters.This is combined with seismic vulnerability models of key components in power-gas systems to calculate the failure probabilities of these components under varying seismic conditions.Next,to address the uncertainty in component seismic damage,the Monte Carlo method is used to simulate potential damage to system components.Following this,the connectivity reliability of the power-gas system nodes is evaluated after removing the damaged components from the system network.The analysis model considers the failure of power supply nodes near gas metering stations,which can lead to failures at gas system source nodes,and the failure of gas supply nodes near power plants,which can lead to failures at power system source nodes.The framework is validated using the IEEE 30-bus power system and a 47-node gas system.The results reveal that spatial variability in seismic ground motions significantly impacts system performance.Compared to a uniform seismic ground motion scenario,the connectivity reliabilities of the power and gas systems decrease by 20.2%and 18.7%,respectively,under spatially varying seismic conditions.In the interdependent power-gas systems,the connectivity reliabilities of the power and gas systems decrease by 9.4%and 22.1%,respectively.In spatial seismic ground motions,the vulnerability of different components in power system is higher,leading to lower seismic connectivity reliability of the power system.The power syste
作者
陈新霖
缪惠全
侯本伟
许成顺
马天鹤
CHEN Xinlin;MIAO Huiquan;HOU Benwei;XU Chengshun;MA Tianhe(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《世界地震工程》
北大核心
2024年第4期1-10,共10页
World Earthquake Engineering
基金
国家重点研发计划项目(2022YFC3003603)。
