Study On Vunerability And Robustness Of Natural Gas Pipeline Network

With the increasing demand of natural gas,its main mode of transport——the natural gas pipeline transportation plays a significant role in our life.Although the natural gas network have been formed and developed by more and more pipelines construction,it still faces a serious threat to the safety of gas supply,such as the aging of the gas transmission system,natural disasters,and terrorist attacks,etc.The security of gas supplying,therefore,has been an important part of the whole city safety and disaster prevention system.This paper,from another perspective,shows my research on the risk assessment of natural gas pipeline network.And under the guidance of my professor,the concept of "robustness" is introduced into the natural gas pipe network and studied.This research on the robustness of natural gas pipeline network system includes two parts:the connection robustness of natural gas pipeline network and the recovery robustness of natural gas pipeline network.Starting from the definition of connection robustness,to build the modeling of connection robustness of natural gas pipeline network,regarding the connection of the pipe network and the vulnerability of the pipe network as as the "volume"of "bucket effect" of the philosophy and the "height of the lowest board".Focuses on the vulnerability analysis,which is the negative side of connection robustness,using spectral clustering method and complex network theory,according to certain criteria,through clustering and de-clustering,this paper finally finds out the vulnerability of most vulnerable part of pipe network,so as to realize the quantitative analysis of the connection robustness.Research may find the most vulnerable part in the pipe network,then makes natural gas pipeline maintenance more economic and effective,to ensure the normal natural gas supply.In addition,by the knowledge of graph theory and complex network theory,we can get the conclusion that you could use the algebraic connectivity of topology structure of pipe network to measure the connection robustness.Through the analysis of the robustness of the pipe network,it can provide reference for the expansion of the pipe network,and provide the reference for the design of the pipeline.At last,some solutions to improve the robustness of the natural gas pipeline network are supplied.By adding redundant pipes,pipe network to improve component and pipeline quality,strengthening the network operating capacity,upgrade network security system and other aspects of the development of measures to increase the redundancy in the calculation of pipeline and improve the pipeline damage demand situation,changes in natural gas pipeline network robustness,validates the correctness of the measures.