西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (3): 135-144.DOI: 10.11885/j.issn.1674-5086.2024.09.04.04

• 石油与天然气工程 • 上一篇    下一篇

LNG与PNG协同供应的混合气源天然气管网设计优化方法研究

郑焯1,2, 周军2, 张树中1, 李肖肖1, 梁光川2   

  1. 1. 中国石化中原石油工程设计有限公司, 河南 郑州 450000;
    2. 西南石油大学石油与天然气工程学院, 四川 成都 610500
  • 收稿日期:2024-09-04 发布日期:2025-07-11
  • 通讯作者: 周军,E-mail: zhoujunswpu@163.com
  • 作者简介:郑焯,1986年生,男,汉族,重庆潼南人,高级工程师,主要从事油气开发、油气储运工程设计和研究等方面的工作。E-mail:zhengz.osec@sinopec.com。
    周军,1987年生,男,汉族,四川德阳人,副教授,博士,主要从事油气储运系统和综合能源系统优化研究工作。E-mail:zhoujunswpu@163.com
    张树中,1975年生,男,汉族,河南焦作人,高级工程师,主要从事油气开发、油气储运工程设计和研究工作。E-mail:zysjyzsz@163.com
    李肖肖,1988年生,男,汉族,河南郑州人,工程师,博士,主要从事水平井、定向井等方面的研究工作。E-mail:18382244018@163.com
    梁光川,1972年生,男,汉族,重庆彭水人,教授,博士,主要从事储气库系统和油气地面集输系统节能优化研究工作。E-mail:lgcdjr@163.com

Design Optimization of Mixed Gas Source Natural Gas Pipeline Network for Collaborative LNG and PNG Supply

ZHENG Zhuo1,2, ZHOU Jun2, ZHANG Shuzhong1, LI Xiaoxiao1, LIANG Guangchuan2   

  1. 1. Zhongyuan Petroleum Engineering Co. Ltd., SINOPEC, Zhengzhou, Henan 450000, China;
    2. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2024-09-04 Published:2025-07-11

摘要: 随着中国大力推进LNG进口与LNG接收站建设,未来沿海城市将形成以LNG与PNG供应为主的天然气管网结构。针对LNG和PNG协同供应的天然气管网设计优化的问题,在管网设计优化基础上,将LNG和PNG协同供应对管网的影响纳入约束中,以年折合费用最低为目标函数,建立LNG与PNG协同供应的混合气源天然管网设计优化通用MINLP模型。以某沿海地区为例,提出分级优化与整体优化两种求解策略求解上述模型,分级优化第一阶段布局优化将以最小流量长度和为目标函数线,采用数学规划求解器GUROBI求解,第二阶段采用数学规划求解器CONOPT求解。整体优化通过增量分段线性化的方法对压降约束线性化,采用数学规划求解器DICOPT求解。最终得到分级优化和整体优化两种管网设计方案,分析发现整体优化求解时间大于分级优化,整体优化的年折合费同比降低749.16万元/年,同比降低1.41%,验证了研究建立的数学模型的可靠性,可为LNG和PNG协同供应的天然气管网方案设计提供参考。

关键词: 液化天然气, 管道天然气, 混合气源, 天然气管网, 混合整数非线性最优化

Abstract: China' vigorous promotion of the construction of LNG import and LNG receiving stations, will from will form a natural gas pipeline network structure mainly for LNG and PNG supply in coastal cities. This research is aimed at the problem of collaborative LNG and PNG supply of natural gas pipeline network design optimization. On the basis of pipeline network design optimization, the influence of collaborative LNG and PNG supply on the pipeline network is included in the constraints, and the lowest annual equivalent cost is the objective function to establish a general MINLP model for the design and optimization of the natural pipeline network of the mixed gas source of LNG and PNG. Taking a coastal area as an example, two solution strategies, hierarchical optimization and overall optimization, are proposed to solve the above model. In the first stage of hierarchical optimization, the layout optimization will take the minimum flow length and the objective function line, and the mathematical programming solver GUROBI for solution, and in the second stage, the mathematical programming solver CONOPT is used. The overall optimization uses incremental piecewise linearization to linearize the pressure drop constraint, and the mathematical programming solver DICOPT for solution. Finally, two pipeline network design schemes of hierarchical optimization and overall optimization were obtained. The analysis found that the overall optimization solution time was longer than that of hierarchical optimization. The annual equivalent cost of overall optimization was reduced by RMB 7.4916 million per year, a decrease of 1.41%, which verified the reliability of the established general model, and can provide a reference for the design of the natural gas pipeline network for the collaborative supply of LNG and PNG.

Key words: LNG, PNG, mixed gas source, natural gas pipeline network, MINLP

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