Optimization of Steady Operation of Large Scale Natural Gas Pipelines

doi:10.11885/j.issn.1674-5086.2018.12.12.01

Abstract

Abstract: To address the high energy consumption of the compressor station of natural gas long-distance pipelines, a pipeline operation optimization model was established based on the dynamic programming method. The optimization variables are the compressor starting quantity and the outbound pressure. The objective function is the lowest total energy consumption of largescale natural gas pipeline compressor stations. Using this model and using the pipelines of the West-East Gas Pipeline I as an example, the operation optimization results of the 22 compressor stations and 32 compressors for the entire line were solved within 60 s, which demonstrates that the dynamic programming method is fast and effective. An analysis of the optimization results indicates that the optimized operation scheme has two more compressors compared with the actual operation scheme. The total pressure drop of the pipeline is reduced by 3.40 MPa, the average efficiency of the gas turbine unit is increased by 4.23%, and the average efficiency of the electric drive unit is increased by 4.88%. The total compressor power is reduced by 18 720.38 kW, and the production unit consumption is reduced by 16.24 kgce/(10⁷ Nm³·km). The optimized operation scheme can greatly reduce the total energy consumption of the West-East Gas Pipeline I, thus verifying the correctness and feasibility of the optimized model.

Key words: long-distance natural gas pipeline, pipeline operation optimization, compressor, dynamic programming, energy consumption

CLC Number:

TE832

LIU Enbin, KUANG Jianchao, Lü Liuxin, LIU Yuan, ZHANG Lu. Optimization of Steady Operation of Large Scale Natural Gas Pipelines[J]. 西南石油大学学报(自然科学版), 2019, 41(5): 150-160.

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