输气管道天然气压缩机工艺气流量软测量研究与实践  

Research and Practice on Soft Measurement of Process Gas Flow of Natural Gas Compressor in Gas Transmission Pipeline

作　　者：刘国豪 侯磊[1] 李清平[1] 任波涛 王乾坤 田望[2] 潘腾[2] 李东阳[2] LIU Guohao;HOU Lei;LI Qingping;REN Botao;WANG Qiankun;TIAN Wang;PAN Teng;LI Dongyang(College of Mechanical and Transportation Engineering,China University of Petroleum,Beijing)

机构地区：[1]中国石油大学(北京)机械与储运工程学院 [2]中国石油管道公司 [3]中国石油集团公司生产经营管理部

出　　处：《石油石化节能》2020年第10期1-4,I0002,共5页Energy Conservation in Petroleum & PetroChemical Industry

摘　　要：天然气压缩机组是输气管道关键的耗能设备,压缩机性能模型是全线优化模型中的核心模块之一,其模型准确度对全线节能优化的水平影响很大。限于目前国内流量计设计及安装现状,天然气压气站均没有单台压缩机进出口的实际流量,调控优化部门无法绘制准确的压缩机实际性能曲线。通过使用流量软测量技术,利用天然气站场现有的数据和资料,建立了准确的压缩机流量软测量模型,得到了单机工艺气流量的连续、准确数据,解决了压缩机单机实际流量不好获取的难题,软测量建模得到的流量模型拟合结果远好于目前的修正模型,平均误差仅为0.92%,远低于小于2%的标准要求,为天然气管道节能优化仿真提供了更准确的压缩机模型;与使用出厂性能曲线的优化方案相比,在不需要其他操作和节能措施的情况下,天然气管道运行企业的能耗率、生产单耗等主要能耗指标将继续下降,运营成本也将进一步降低。The natural gas compressor unit is the key energy consumption equipment of the gas transmission pipeline.The compressor performance model is one of the core modules in the whole line optimization model.The accuracy of the model has a great impact on the level of energy saving optimization of the whole line.Limited to the current domestic flow meter design and installation status,there is no actual flow at the inlet and outlet of a single compressor in the natural gas station,so the regulation and optimization department is unable to draw accurate compressor actual performance curve.Through the use of flow soft measurement technology,using the existing data and data of the natural gas station,an accurate soft measurement model of compressor flow is established,and the continuous and accurate data of single process gas flow is obtained,which solves the problem that the single compressor flow is not easy to obtain.The flow model fitting result of soft measurement modeling is far better than the current modified model,and the average error is only 0.92%It is far lower than the standard requirement of less than 2%,which provides a more accurate compressor model for the energy saving optimization simulation of natural gas pipeline.Compared with the optimization scheme using the ex factory performance curve,the energy consumption rate,production unit consumption and other main energy consumption indicators of natural gas pipeline operation enterprises will continue to decline without other operation and energy saving measures,and the operation cost will further reduce.

关 键 词：天然气压缩机 工艺气流量 软测量 建模 运行优化 

分 类 号：TE974[石油与天然气工程—石油机械设备]