As China's natural gas pipeline network continues to expand and operate independently from upstream and downstream,the limitations have gradually become apparent such as slow or non-convergent of gas supply calculation using traditional simulation calculation methods and the objective function of optimizing pipeline energy consumption not aligning with the core interests of natural gas shippers and users,leading to controversy over the analysis results of the gas source structure of users in the current natural gas pipeline network.To solve the above problems,it's necessary to regard the natural gas pipeline network as a complex network,apply complex network theory,take the core demand"gas supply schemes should prioritize meeting gas demand and then seek the lowest pipeline transportation costs"raised by shippers and users as the objective function for gas supply calculation,and decompose the gas supply calculation problem into two linear programming processes:maximum flow and minimum cost.Based on the gas supply calculation results,three core principles were proposed:the lowest overall pipeline transportation cost,sufficient mixing of natural gas through the station,and fair distribution.Through formula derivation,a set of gas source tracking algorithms is established.The case trial calculation results show that this algorithm can quickly obtain the corresponding minimum pipeline transportation fee and the flow configuration of each pipeline section under the specified conditions of a given day,as well as the gas supply situation from each gas source to each user.It also shows that this algorithm has a clear and intuitive logic,providing a solution for tracking gas sources in ultra large and complex natural gas pipelines,and providing theoretical support for a scientific natural gas pricing mechanism.It can effectively avoid the"one size fits all"pricing of natural gas and mutual suspicion between supply and demand sides,which is conducive to further promoting the fair opening of the natural gas industry to market entities.
natural gas pipeline networkcomplex network theorygas supply calculationgas source tracking
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