Optimal Planning Of The Natural Gas Transportation Pipeline Network System

Gas gathering pipeline systen is a numerous and complex system, Program of gas gathering pipeline system must be considered at first In developing gas field ground engineering. Pipeline network will be arranged between well head and station, between station and station. In the past, it's difficult to deal with the arrangement of pipele network and stations as a whole because of the calculating technology. A result is that while running the system. It is can't meet the need of a technology requirement. In result, the system will be constructed repeatly, or remaked. The construction investment will be in creased. The manpower, the material and the money will be wasted.In general, gas gathering pipline network span a vast area, enviroment condition is complex and changeful at the same time, during the running of pipeline system, risk will accompany the pipeline system, this means that damger along with the pipline system. How do we redace the risk? We mat deal with this problem and solve it.In this thesis, take a gas gathering system optimization as two objective functions. Up to now we haven't read anly paper that reports engineering optimization on two objectives. The optimization objectives are cost and risk.In the way of studying on optimal design of gas gathering system, It's the first time to aim the two objectives, those are cost and risk, the mathematical model ot optimal design has been developed for gas gathering pipline-network system. Have succeeded in adopting the Analytic Hierarchy Process(AHP), the methods of solving unequal weighing sterner point and regularizing weighing distribution has been advanced first time. The disposition optimization of gas gathering pipeline network system has been solved. At the same time, the subject, for rebuilding a gas transport ion pipeline-netwrk, has been researched. Based on the simulation analysis of Sichuan gas transportion pipeline network, the rebuilding project recommended, in this thesis, can compare with which the foreign companies aired.The out come achieved, In this thesis, In the way of optimization research of gas gathering pipeline system, has general significance. It not only use for building a new gas gathering system. But also can use for appraiseing and rebuilding an old one.