Abstract A non-linear model is developed to capture the transient flow and pressure behaviour of methane-rich gas (MRG) in industrial pipelines for the use in simulation and control applications. Hyperbolic partial differential equations describe the pipe pressure and flow profiles, and composition analyses are used to develop the physical properties of the gas appearing in the pipe segment equations. The spectral element method (SEM) is used to numerically solve the spatial profiles within the pipeline, and a model verification is done on the SEM tuning parameter choices. The model is developed into a compact state–space description for improved usability. Furthermore, the developed model achieves good accuracy when validated on real process data of an industrial MRG network and can be used for simulation and model-based control applications.

中文翻译：

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用于模拟和控制的富含甲烷的天然气管网建模

摘要 开发了一种非线性模型来捕捉工业管道中富甲烷气体 (MRG) 的瞬态流动和压力行为，以用于模拟和控制应用。双曲线偏微分方程描述管道压力和流量分布，成分分析用于开发管段方程中出现的气体的物理特性。光谱元素法 (SEM) 用于对管道内的空间剖面进行数值求解，并对 SEM 调谐参数选择进行模型验证。该模型被开发成一个紧凑的状态空间描述，以提高可用性。此外，开发的模型在工业 MRG 网络的实际过程数据上验证时具有良好的准确性，可用于仿真和基于模型的控制应用。