摘要
为了有效降低天然气长输管道压气站的运行能耗,以输气管道的依次相接的单条管道和压气站为研究对象,基于输气管道理论基础及动态规划法,分别建立了输气管道稳态仿真模型和以各压气站总能耗最低为目标函数的输气管道稳态运行优化模型,明确了该模型的优化对象为各站压缩机开机台数和出站压力,根据仿真、优化程序,求解了某管道在一确定输量下的算例。研究结果表明:①相同输量及开机方案下,输气管道自定义仿真结果与TGNET模拟结果的相对误差较小,表明了该仿真程序的模拟精度符合工程实际要求,验证了仿真计算模块的准确性,可作为优化程序运行的基础计算模块;②相同输量下采用优化开机方案可使全线压缩机总功率有效降低,验证了所建优化模型的优化性,对管道的经济运行具有指导意义;③建立的输气管道稳态运行优化模型也适用于前期设计阶段,将设计与优化相结合,能提高设计方案的合理性。
In order to effectively reduce energy consumption in compressor stations along long-distance gas pipelines, this paper took not only single pipeline connected one by one but also compressor stations as examples. Furthermore, according to pipeline theory and dynamic programming methods, two pipeline models were developed on the basis of objective function of minimizing total energy consumption, including one steady-state simulation model and another steady-state operation optimization model. Then, two optimal aims of in-operation compressor quantity at each station and outlet pressure were determined. Finally, a case calculation was conducted on one certain pipeline at the given throughput by means of simulation and optimization. Results show that (1) as for the same throughput and start-up scheme, there is a smaller error between customized simulation result and TGNET one, indicating that this simulation program may meet the requirements of actual engineering in term of simulation precision and verify an accuracy of simulation calculation module. Therefore, it can be used as the basic calculation module to optimize programming run;(2) at the same throughput, to apply an opti mized start-up scheme can effectively reduce total workload of all compressors along pipelines. It is verified that the newly established optimization model is of guiding significance to cost-effective pipeline operation;and (3) the newly established steady-state operation optimization model is also applicable to pre-design stage. It combines design and optimization together resulting in an increase of design conformity.
作者
皮礼仕
Pi Lishi(Central and Southern China Municipal Engineering Design&Research Institute Co.,Ltd.,Wuhan,Hubei 430010,China)
出处
《天然气技术与经济》
2020年第1期69-73,79,共6页
Natural Gas Technology and Economy
关键词
动态规划法
输气管道
稳态
运行优化
Dynamic programming method
Gas pipeline
Steady state
Operation optimization
