Study On Hydraulic Conditions Of Multi-gas Source Natural Gas Pipe Network

With the national gas pipeline network have been built, a pattern of co-existence of multiple gas sources began to emerge in the city. Gas pipeline network connecting the source and the market as the arteries, generally with high pressure. In actual operation, the operating parameters are always changing in the multi-gas pipeline network, comprehend and master the hydraulic conditions is extremely important for monitoring, managing and control of the entire pipe network.Hydraulic calculation of high pressure gas pipeline network, the compressibility of the gas pipeline must take into account. By comparing several methods of calculating compression factor and proved through an example to determine the applicable method for a complex pipe network structure.According to the node equation method, combined with the basic knowledge of graph theory, developed a hydraulic calculation program of multi-gas source pipe network using MATLAB software, and verify the accuracy of the program on a practical engineering.Partition the gas pipeline network according to geographical location, construct several different operating conditions by changing the nodes required pressure in every district, analysis the results of each hydraulic conditions, determine the high and low hydraulic reliability areas, during the operation and management need to focus on the areas with lower hydraulic reliability and proposed some controlling method.According to the amount of gas supply of every gas source and the pipe flow in the hydraulic calculation results could identify the supply ratio of every gas source in each node and each pipe, then the supply scope of every gas source could be analyzed. This study not only provide a method and basis for manage and deployment the gas source, but also has a certain significance for the gas supply mode in midstream and the applicability of research in downstream.The subject show that the hydraulic calculation procedures for multi-gas source supply network and the analysis method for the results of various operating conditions has obvious practical value when design, planning, management, optimal, operation and control a gas pipeline network.