Research on the Node Importance Evaluation of Gas Pipeline Networks Based on Complex Networks

Abstract

AbstractAs China is advancing the renewal of urban infrastructure, the renewal of urban gas pipeline networks is a must to be solved. In the renewal project of gas pipeline networks, it is not uncommon to see the failure of key nodes, which will cause the cascading failure of gas pipeline networks. Thus, it is necessary to study the key nodes of gas pipeline networks. Based on the complex network theory, the paper establishes and simplifies the topology model of the gas pipeline networks, calculates the node degree and node betweenness of the gas pipeline networks, and evaluates the importance of nodes in the complex network. It also evaluates the importance of nodes for gas supply by introducing the principle of entropy. Finally, it comprehensively explores the importance of comprehensive nodes in the complex network and the gas supply importance of nodes and identifies the key nodes in the gas pipeline networks. It provides guidance for urban renewal projects to avoid cascading failures and is of instructive significance for safety gas construction.KeywordsGas pipeline networksNode importanceComplex networksFlow entropy