Urban Gas Supply System Risk Evaluation And Prevention Research

With the high speed development of economy, urban gas supply the safety and reliabilityof the system demand more and more. However, many influence factors of the supply systemof air supply, pipeline network, natural gas applications every link different degree of damagecaused, produce the huge economic losses. Our country in natural gas supply system for thecity of risk research focus on the pipeline network system, and the natural gas supply systemfor the city of the whole less risk assessment, therefore, city gas supply system as the wholecity economic development is one of the important parts, and study the system risk is of greatsignificance.Based on the lessons from the domestic and foreign relevant field theory based on theresearch of urban gas supply system of risk evaluation of the in-depth analysis. First, theanalysis of urban gas supply system of component part, mainly including air subsystem, pipenetwork subsystem and application subsystem, and of each subsystem described; Secondly,the use of the accident tree method and the Delphi method, to identify the risk of natural gassupply system, establish the urban gas supply risk evaluation index system, including riskfactors and the severity of the evaluation index consequences evaluation index, including riskfactors including risk evaluation indexes such as air five primary index, the third partydestructive14secondary indexes, gas production accidents,37level3index; The severity ofthe consequences include property damage evaluation index, three primary index, equipmentdamage, eight secondary indexes. Once again, the use of triangular fuzzy number methoddetermines the index weight, and in a lot of research are determined on the basis of the riskfactor assessment standards, the fuzzy comprehensive evaluation method constructed the citygas supply system risk assessment model. At last, according to city gas supply system risks,and put forward the corresponding measures to prevent risks.