输气管道系统分析及改造研究

【作者】 陈宁；

【导师】 袁宗明；

【作者基本信息】 西南石油学院 ， 油气储运工程， 2003， 硕士

【摘要】 本文介绍了输气管道系统的分析及改造问题，主要研究了现存复杂树枝状干线管网系统的改造和分析。 对于本文研究的现存管网的分析和改造而言，首先对一个已经建成的复杂树枝状干线输气管网系统进行模拟计算和分析，掌握管网的运行状态，然后判断其是否能正常地运行。具体而言，就是在管网的进分气点、进分气量、任务输量、起终点压力要求等条件已知的情况下，计算各节点的压力。以费用为目标函数，分别建立了上压缩机站和增设副管的数学模型，提出了以牛顿迭代法和方案比较法等解此模型的步骤，分别求出使改造费用最省的压缩机站参数(压缩机压比、上压缩机站的位置等)和副管的参数(副管的管径、长度、流量、上副管的位置等)，将求出的工艺参数和已知的经济参数代入数学模型中，比较费用的大小，选择其中费用最小的方案即为现存管网改造的最优方案。 最后，对某管网的实际情况进行了分析，提出了管网改造的方案供挑选，并在此基础上给出了经济决策的流程图，以供具体选择改造方案时之用。更多还原

【Abstract】 The dissertation has introduced the analyzing and reconstruction question of complicated treed natural gas pipe network system.It has studied the analyzing and reconstruction question of old pipe network.To the analyzing and reconstruction question of old pipe network that has been studied in the dissertation,the first task is to make simulated calculation of the network.The goal of the calculation is to determine if the network can work normally.That is to say,at the condition of random discharge of node points and the pressure of the beginning and the ending,the pressure of node points has been caculated.Having taken the cost as the object fuction,then,it has built the maths models of compressor station and assistant pipe respectively.Then.it uses Newton repeated method and comparision method to resolve the models respectively.The parameters such as compression ratio,diameter and length have been obtained.Then ,by using the technological parameters and economical parameters into the models,the cost has been obtained.Then,it has chosen the minor one by comparing the cost between them.The corresponding programme is the optimal reconstruction programme of the old network.At last,it analyzed a network and provided programmes of reconstuction.On the basis of this,the process of economic decision has been made to be used when the people chose programmes of reconstruction.更多还原