Study On Vulnerability Assessment And Optimization Of Oil And Gas Network Node

As one of the social infrastructure networks,the oil and gas pipeline transportation network,which has the name of "energy artery ",the particularity of its storage and transportation medium.In order to curb the occurrence of oil and gas pipe network accidents,we must start with the essential causes of accidents and improve the essential safety of pipe network systems,and vulnerability,as the essential cause of accidents,has also been widely concerned by researchers in recent years.At present,the research on the vulnerability of oil and gas pipe network mainly focuses on the specific vulnerability factors of pipeline,the vulnerability of bearing body,the vulnerability of consequences and so on,which is limited to a single factor or a single consequence to evaluate.As the basic unit of oil and gas pipeline transportation system,the joint of oil and gas pipe network plays an important role in the pipe network.Therefore,it is of theoretical and practical significance to study its comprehensive vulnerability systematically and comprehensively.On the basis of summarizing the previous studies on vulnerability,this paper first defines the vulnerability of oil and gas pipe network nodes and clarifies the research objectives.On the basis of analyzing the network node vulnerability from two external and internal aspects of pipe network topology and node’s own state,the identification parameters are constructed,the vulnerable sources of pipe network nodes are screened,and the external vulnerability assessment index and internal vulnerability assessment index are further established.Then,the BP neural network is used to construct the comprehensive vulnerability assessment model of oil and gas pipe network nodes.Based on the VSD vulnerability framework of "exposure-sensitivity-adaptation ",this model is used to analyze the mechanism of node vulnerability from four systems: equipment,management,environment and personnel design simulation experiments,and explore the network node vulnerability optimization strategy according to the simulation results.The results show that the comprehensive vulnerability assessment model of oil and gas pipe network nodes constructed in this paper has high rationality and can be applied to the vulnerability assessment of oil and gas pipe network nodes.In addition,according to the simulation results,in order to reduce the comprehensive vulnerability of pipe network nodes and ensure the safe and stable operation of the station,the node exposure can be reduced by improving the equipment system,mainly production and fire fighting equipment.