Research on Simulation Model and Solving Technology of Large Scale Gas Pipe Network

All topological structure of gas pipeline network was described effectively and the dynamic mathematical models were built up,and further the mathematical models were linearized based on of Taylor's series.To solve the complex thermal system and hydraulic system,the "Leapfrog method" and "Upwind scheme" were applied,and by these methodologies,the unsteady problems such as surge and saw tooth on some hydraulic conditions were solved effectively.These works laid the foundation for localization of pipeline simulation software.The simulation software was self-developed.The computational accuracy,computational efficiency and useability were shown by contrasting the simulation results of this software and SPS,and this simulation software is very valuable in engineering practice.