| 摘要: |
| 输气能力(GTC)是天然气管网系统的关键指标,用于描述系统的输送能力极限。天然气管网系统存在输气能力曲线,能更完整地描述系统的输送能力极限。描述天然气管网系统运行时的工作点和输气安全性,并给出GTC的数学模型。提出GTC曲线的定义、模型、指标及绘制方法。分别基于小型天然气管网和大型比利时天然气管网验证所述方法,并与现有方法对比,分析GTC曲线的理论意义与应用前景。结果表明:GTC仅是GTC曲线中的极大值点,达到GTC的临界安全状态不只一个,同时还存在很多小于GTC的临界安全状态;GTC曲线能反映系统在不同负荷分布下的输气极限,有助于更深入理解管网的输气能力范围,并指导规划运行。 |
| 关键词: 天然气管网系统 输气能力 输气能力曲线 输气安全性 输送能力极限 |
| DOI：10.3969/j.issn.1673-5005.2022.02.017 |
| 分类号::TE 832 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(51877144) |
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| Gas transmission capability curve of natural gas pipeline system |
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SONG Chenhui1, XIAO Jun1, CHEN Qian2, QU Yuqing1, QIU Zekai1, LI Hang3
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(1.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China;2.School of Mechanical and Storage and Transportation Engineering, China University of Petroleum(Beijing), Beijing 102249, China;3.Suzhou Operation and Maintenance Station, Maintenance Branch of State Grid Jiangsu Electric Power Company Limited, Suzhou 215000, China)
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| Abstract: |
| The gas transmission capability (GTC) is a key index for the natural gas pipeline system, which is used to describe the transmission capability limit of the system. There exists the GTC curve in the natural gas pipeline system, which can describe the transmission capability limit of the system more completely. The operating point and the security of natural gas transmission were defined, and the mathematical model of GTC was presented meanwhile. Then, the definition, model, indices and plotting method of the GTC curve were proposed. A small-scale natural gas pipeline network and large-scale natural gas pipeline network (Belgium system) were used to verify the proposed methods. The method in this paper was compared with the traditional method, and the theoretical value and application prospect of GTC curve were discussed further. The results show that GTC is just the maximum point on the curve. The critically secure state of GTC may not be unique, and there exist many critically secure states whose gas transmission volumes are less than GTC. The GTC curve can reflect the gas transmission limit of the system under different load distributions, which is beneficial to better understand the range of transmission limit of natural gas pipeline system, and to guide the planning and operation. |
| Key words: natural gas pipeline network system gas transmission capability gas transmission capability curve gas transmission security transmission capability limit |
