城市天然气输配管网水力模拟研究与实践

发布时间：2018-03-17 06:06

本文选题：天然气管网　切入点：MATLAB　出处：《重庆大学》2013年博士论文　论文类型：学位论文

【摘要】：随着天然气事业的迅猛发展，我国的天然气管网建设规模不断壮大，城市天然气管网的监管越来越受到重视，并且城市天然气管网向智能化的方向发展。由于，管网实际运行水力工况对经济性、安全性及末端用气的稳定性有着极其重要的影响，因此，了解和掌握其水力工况对于整个管网的监测、管理和调控是必不可少的，对城市天然气管网模拟的研究也就显得异常重要。传统的节点法进行稳态模拟结果的精度并不能完全满足城市天然气管网实际运行的需求，因此，为了保证模拟结果的精确度，计算程序采用精度更高、适用性更强的数据处理和参数选择方法。然后通过比较分析，选择适当的动态模拟方法，编制动态模拟计算程序，并且验证程序计算结果的准确性。如今，城市天然气需求量不断增加，促使管网建设的规模化发展，管网结构越来越复杂，并且压力也越来越高，甚至达到超高压。而超高压管网的模拟必须考虑管路中燃气的可压缩性。本文通过对比几种压缩因子的计算方法，最终确定采用SHBWR状态方程法，同样，热力学参数的计算也采用SHBWR状态方程法。另外，城市多气源天然气管网建设也成为发展的趋势，而多气源管网的模拟需要根据不同的气源情况进行分析，采用不同的处理方式计算。笔者利用模拟程序对规划的多气源城市天然气管网项目进行水力工况分析。提出未来各气源在管网系统中的适用性，并提出各气源的主要影响范围，有利于未来管网运行过程中，及时准确的应对各种状况提供依据。最后，根据多气源天然气输气管网中各气源的供气量和水力模拟计算结果中的管段流量值，可以确定各种气源在各个管段及各个节点的气质组成，为供气单位的运行管理及对气价的制定提供理论依据和数据支持。本课题的研究表明，模拟程序不仅可以应用于在用管网系统的模拟计算，分析管网运行水力工况，而且可以应用于规划的管网。对于未来管网运行工况的结果的分析对指导燃气管网的设计规划、优化运行及调控管理等方面具有明显的实用价值，，对于中游供气模式及下游燃气用具适用性研究都有一定的指导意义。
[Abstract]:With the rapid development of natural gas industry, the scale of natural gas network construction in our country is growing, the supervision of urban natural gas network is paid more and more attention, and the urban natural gas network is developing to the direction of intelligence. The actual hydraulic condition of the pipe network has an extremely important influence on the economy, safety and the stability of the terminal gas. Therefore, it is essential to understand and master its hydraulic condition for the monitoring, management and control of the whole pipe network. It is very important to study the simulation of urban natural gas network. The accuracy of the static simulation results of the traditional node method can not fully meet the needs of the actual operation of the urban natural gas pipeline network. Therefore, in order to ensure the accuracy of the simulation results, the accuracy of the calculation program is higher. The method of data processing and parameter selection is more applicable, and then through comparative analysis, the appropriate dynamic simulation method is selected, the dynamic simulation calculation program is compiled, and the accuracy of the calculation result is verified. Nowadays, the increasing demand for natural gas in cities is promoting the large-scale development of pipe network construction. The pipe network structure is becoming more and more complex, and the pressure is also increasing. The compressibility of the gas in the pipeline must be considered in the simulation of the ultra-high pressure pipe network. By comparing the calculation methods of several compression factors, the SHBWR equation of state method is finally adopted in this paper. The thermodynamic parameters are also calculated by SHBWR equation of state method. In addition, the construction of urban multi-source natural gas pipeline network has also become a trend of development, and the simulation of multi-source gas pipeline network needs to be analyzed according to different gas sources. By using different treatment methods, the author uses simulation program to analyze the hydraulic working conditions of the planned multi-source urban natural gas pipeline network project. The applicability of each gas source in the pipeline network system in the future and the main influence range of each gas source are put forward. In the future, the pipeline network operation process, timely and accurate response to various conditions to provide the basis. Finally, according to the gas supply of each gas source in multi-source natural gas transmission network and the flow value of the pipe section in the hydraulic simulation calculation result, the temperament composition of each gas source in each pipe section and each node can be determined. To provide theoretical basis and data support for the operation management of gas supply unit and the formulation of gas price. The research of this subject shows that the simulation program can not only be applied to the simulation calculation of the pipe network system, but also to the analysis of the hydraulic condition of the pipe network operation. And it can be applied to the planned pipeline network. The analysis of the result of the future pipeline network operation condition has obvious practical value in guiding the design and planning of the gas pipe network, optimizing the operation and regulating and managing, etc. It has certain guiding significance for the study of the gas supply model and the applicability of downstream gas appliances in the middle stream.
【学位授予单位】：重庆大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU996.7

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