Operation Optimization Method on Saving Compressor Energy of Natural Gas Pipeline

摘要

The long distance gas pipeline compressor is a large-scale energy consumption equipment, the operation energy consumption of compressor station account for more than 70% of the operation energy consumption of the gas pipeline system. In the practical operation, gas pipeline and compressor station is a unity. The operating parameters are interrelated, affected by factors such as changes in production capacity of gas source, seasonal fluctuation of user gas consumption and equipment service or failure. The operating conditions for pipelines are constantly changing over time, so the compressor unit may be at low-efficiency resulting in the rise in unit of gas energy consumption or gas pressure and flow rate less than the set values. On the basis of the security analysis in the joint operation of the pipelines, equipment components, Selecting the operating mode and status of the compressor unit, as well as the operating parameters of the gas stations (compressor stations, injection points, outlet points, the pipeline intersections, etc) as the optimization variables. Taking the operation energy consumption of pipe network as the objective function, establish the optimization model of energy-saving operation of long distance gas pipeline, and then put forward the model solution method based on bundle projection subgradient method combined with Lagrange multiplier. Through the computation and analysis of actual operation scheme for pipelines, the results show that it effectively reduce the operating energy consumption of the entire gas pipeline system.