Reliability Assessment for Integrated Power-gas Systems Considering Renewable Energy Uncertainty and Cascading Effects  

作　　者：Yucui Wang Yongbiao Yang Qingshan Xu 

机构地区：[1]School of Cyber Science and Engineering,Southeast University,Nanjing 210096,China [2]School of Electrical Engineering,Southeast University,Nanjing 210096,China and Nanjing Center for Applied Mathematics,Nanjing 210096,China

出　　处：《CSEE Journal of Power and Energy Systems》2023年第3期1214-1226,共13页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by the Key Projects of National Natural Science Foundation of China under Grant 51936003。

摘　　要：Integrated power-gas systems(IPGSs)make the power system and natural gas system(NGS)as a whole,and strengthen interdependence between the two systems.Due to bidirectional energy conversion in IPGS,a disturbance may turn into a catastrophic outage.Meanwhile,increasing proportion of renewable energy brings challenges to reliability of IPGS.Moreover,partial failure or degradation of system performance leads IPGS operate at multiple performance levels.Therefore,this paper proposes a reliability assessment model of IPGSs which represents multiple performance of components and considers cascading effects,as well as renewable energy uncertainty.First,a framework of IPGS reliability assessment is proposed:multistate models for main elements in the IPGS are represented.Especially a gas-power-generation calculation operator and a power-to-gas calculation operator are utilized to bi-directionally convert a multi-state model between NGS and power systems.Furthermore,nodal reliability indices for IPGS are given to display impacts of cascading effects and renewable energy uncertainty on reliabilities of IPGSs.Numerical results on IPGS test system demonstrate the proposed methods.

关 键 词：Cascading effects integrated power-gas systems multi-state model reliability renewable energy uncertainty 

分 类 号：TK01[动力工程及工程热物理] TM732[电气工程—电力系统及自动化]