能量计量体系下多气源管网运行优化研究

A Study on Operation Optimization of Multi-gas Source Pipeline Network in Energy Measurement System

针对全国“一张网”的多气源天然气供应格局现状,传统的体积计量交易体系已不适合中国天然气管道的运营与发展,使用能量计量更能体现出天然气本身具有的能量特征,促进天然气市场的整合与升级。在考虑天然气能量计量体系实施方案和非居民用户对天然气气质需求的基础上,创新性地提出了能量计量体系下多气源管网运行优化模型,模型以管道运营利润最大化为目标,以气源供气量和全线增压方式为决策变量。将所建模型应用于国内某长输管道,并利用GAMS/ANTIGONE求解器获得了模型最优解。结果表明,不同能量计量体系实施方案下优化结果均优于现场实际运行方案,最高提升了32.05%的运营利润。其中,购气成本在管道运营成本中占比最高,受各气源气价、供气量和热值的综合影响;管输成本和压气站运行成本受各气源供气量的间接影响;需求节点处天然气热值含量越高,售气收益越高。

In view of the current situation of the multi-source natural gas supply pattern of“one network”in China,the traditional volume measurement and trading system is no longer suitable for the operation and development of China′s natural gas pipeline.The use of energy measurement can better reflect the energy characteristics of natural gas itself and promote the integration and upgrading of the natural gas market.On the basis of considering the implementation scheme of natural gas energy metering system and the demand of non-resident users for natural gas quality,this paper creatively puts forward the operation optimization model of multi-gas source pipe network under the energy measurement system.The model takes the maximization of pipeline operation profit as the goal and the gas supply volume and pressurization mode of the whole line as the decision variables.The model is applied to a long-distance pipeline in China,and the optimal solution of the model is obtained by using GAMS/ANTIGONE solver.The optimization results show that the optimization results under different energy measurement system implementation schemes are better than the actual operation schemes on site,and the maximum operating profit is increased by 32.05%.Among them,the gas purchase cost accounts for the highest proportion in the pipeline operation cost,which is comprehensively affected by the gas price,gas supply volume and calorific value of each gas source;the pipeline transportation cost and compressor station operation cost are indirectly affected by the gas supply volume of each gas source;the higher the calorific value content of natural gas at the demand node is,the higher the gas sales revenue.