摘要
天然气管网余压资源利用是实现双碳目标的关键技术路径之一。压力能出力特性分析是支撑其高效利用的基础。为提高能源利用率和改善天然气管网运行经济性,提出考虑双重不确定性的天然气压力能出力特性分析方法。首先,提出一种并联式天然气管网压力能发电系统架构,并对其出力影响因素进行分析。然后,建立天然气网络模型及其各类负荷需求模型,并基于不确定性理论,构建考虑天然气流量与压力的双重不确定性模型;在此基础上,构建压力能出力[火用]分析数学模型,并提出波动性指标对压力能出力特性进行分析。结果表明:①天然气压力能发电功率随膨胀机入口天然气流量、温度与压力增大而增大;②天然气压力能发电具有典型的时空特性与不确定性;③压力能发电波动性受时间尺度影响,时间尺度越大,波动性越强。
The utilization of residual pressure resources in natural gas pipeline networks is one of the key technical paths to achieve the dual carbon goal.The analysis of pressure energy output characteristics is the basis for supporting its efficient utilization.In order to improve energy utilization efficiency and improve the operating economy of natural gas pipeline networks,a natural gas pressure energy output characteristics analysis method considering dual uncertainties was proposed.Firstly,a parallel natural gas network pressure energy power generation system architecture was proposed,and the factors affecting its output were analyzed.Then,a natural gas network model and various load demand models were established,and a dual uncertainty model considering natural gas flow and pressure was constructed based on uncertainty theory.On this basis,a mathematical model for pressure energy output analysis was constructed,and a volatility index was proposed to analyze the pressure energy output characteristics.The results show these as follows.The power generated by natural gas pressure energy increases with the increase of natural gas flow rate,temperature,and pressure at the inlet of the expander.Natural gas pressure energy power generation has typical space-time characteristics and uncertainty.The volatility of pressure energy power generation is affected by the time scale,and the larger the time scale,the stronger the volatility.
作者
杨威
刘金和
张安安
林冬
黄博
林思雨
YANG Wei;LIU Jin-he;ZHANG An-an;LIN Dong;HUANG Bo;LIN Si-yu(College of Electrical Engineering and Information,Southwest Petroleum University,Chengdu 610000,China;PetroChina Southwest Oil and Gas Field Branch,Chengdu 610000,China)
出处
《科学技术与工程》
北大核心
2023年第31期13315-13324,共10页
Science Technology and Engineering
基金
四川省科技计划(2020YFSY0037,2020YFQ0038,22ZDYF2912)
中央引导地方科技发展专项(2021ZYD0042)。
关键词
天然气压力能
双重不确定性
分析法
波动性
时空特性
natural gas pressure energy
double uncertainty
energy analysis
fluctuation
time and space characteristics
作者简介
第一作者:杨威(1990-),男,汉族,四川成都人,博士,讲师。研究方向:电动汽车与电网互动、综合能源系统。E-mail:yangwei_scu@126.com;通信作者:刘金和(1998-),男,汉族,四川达州人,硕士研究生。研究方向:天然气压力能利用。E-mail:1915913266@qq.com。
