Techno-economic Study Of Some Gas Pipeline Network System

There are great plentiful energy sources in central Asia,.It is estimated that the greement sendout between China and central Asian countriesa will reach 12000 billion cubic meters per year.Therefore,the supply security of central Asian gas is very important for safeguarding China's energy supply.In this paper,the models of the Central Asia natural gas pipeline A/B?Central Asia natural gas pipeline C and Central Asia natural gas pipeline D have been built using the software TGNET.We calculates the maximum transmission capacity of the pipes and fit the function relationship between gas consumption and throughout.Based on lowest gas consumption principle and maximum net profit principle,the throughout of Central Asia pipelines are distributed according to import volume.Analyze accident-operation of Central Asia pipeline including the failure of compressor station,pipe failure and supply failure.We can draw the conclusion that failure of the single pipelines and compressor station closer to the terminal station have larger and faster effect on the system.The existence of jumper pipe can increase the survival time of syste and reduce the failure flow loss.Double cross connection of jumper pipe is more reliable than single cross connection.Besides,the feasibility of joint operation between Central Asia gas pipeline A/B and Central Asia gas pipeline C is analyzed.The two pipelines are not the same hydraulic system.It is difficult to realize joint operation of the two pipelines under all throughouts.But under some throughput,joint operation can realize at some stations.