输气管网适应性分析

对于一套现存的输气管网系统，由于资源、市场的不断变化，使得现有输气管网系统有可能不适应输送工艺的要求，需要对管网进行适应性分析。而要对管网进行准确的适应性分析，就需要对管网进行准确的水力计算。为此，建立了水平输气管网的稳态水力计算模型，采用具有二阶精度的预测-校正法对所建立模型进行求解，并对多条实际管道进行了模拟计算；然后与TGNET软件的计算结果进行了对比，证明所建立的模型和采用的预测-校正方法具有精度高、计算方法简便的特点，为输气管网适应性分析提供了准确的手段。所给出的3种判断管网适应性的方法，可为管网规划和改造提供依据。

STUDIES ON ADAPTABILITY OF NATURAL GAS TRANSMISSION PIPELINE NETWORK

For an existent gas transmission pipeline network system, it is necessary to conduct adaptability analysis to accommodate it to the gas transmission technologies, as a result of the continuously changing resources and markets. To perform accurate pipeline adaptability analysis, hydraulic calculation needed to be carried out correctly. Thus, a steady hydraulic calculation model of the horizontal gas network is established to conduct simulation calculation of several practical pipelines, by using predicator-corrector method with second-order precision. Then, the mathematical solution is verified by TGNET software, indicating that the solution is easy for calculation and of high accuracy. The 3 approaches given by the solution for judging pipeline network's adaptability, can provide scientific data for new pipeline network plans and revamping plans.