Identifying the critical factors of transmission efficiency loss in China’s natural gas network

China’s market-oriented reform supports the sustainable development of energy mix and low-carbon target, natural gas has bridged transition from traditional fossil to clean renewable energies. The third-party access policy, launched recently by market, drives decouple between trade transport. might lead transmission resources physical network not optimally used, which is caused contractual arrangement entry exit capacities in commercial network. Aiming at this issue, we established a mathematical programming with equilibrium constraints (MPEC) integrate allocations capacity flows, based on minimum cost maximum flow problem (MCMF) abstracted existing MPEC model was then used strategically evaluate efficiency, identify critical factors its loss. Our results show that there efficiency loss shortage geospatial supply invisible segmentation due interdicted pipeline, bottleneck pipeline economic radius chains transport gas. Therefore, factor be identified will helpful for reducing decoupling