Pipeline networks are the primary means of natural gas transmission, and assessing the gas supply reliability is of great significance for the safe and stable operation of pipeline networks. However, current assessment researches for the gas supply reliability are just conducted on the entire pipeline networks and based on the failed pipeline networks, i.e. the assessment process is static. The individual difference differences among users and the reparability of pipeline networks are neglected, which make the assessment results not comprehensive and objective enough. To address these problems, a new assessment index is defined to assess the gas supply reliability of individual users by combining the gas shortage time and severity in this paper, and the gas supply reliability assessment is carried out from the perspectives of entire pipeline networks, individual users, gas shortage amount and gas shortage time. Furthermore, an operation state determination model of pipeline networks is established based on the failure and repair processes. Finally, a systematic assessment method with dynamic characteristics is proposed. By using the assessment method, the gas supply reliability of an actual pipeline network is assessed. The differences between the assessment of entire pipeline network and individual users are compared, and the importance ranking of components is presented. The assessment results can provide a theoretical basis for an economical optimization of the gas supply reliability of pipeline networks.

管道网络是天然气输送的主要手段，评估供气可靠性对管道网络的安全稳定运行具有重要意义。然而，目前对气体供应可靠性的评估研究只是在整个管道网络上进行的，并且是基于失效的管道网络进行的，即评估过程是静态的。忽略了用户之间的个体差异和管网的可修复性，这使得评估结果不够全面和客观。为了解决这些问题，本文结合瓦斯短缺时间和严重性，定义了一个新的评估指标来评估个人用户的瓦斯供应可靠性，燃气供应可靠性评估是从整个管道网络，个人用户，燃气短缺量和燃气短缺时间的角度进行的。此外，基于故障和修复过程，建立了管道网络的运行状态确定模型。最后，提出了一种具有动态特性的系统评价方法。通过评估方法，可以评估实际管道网络的供气可靠性。比较了整个管道网络评估和个人用户评估之间的差异，并给出了组件的重要性排名。评估结果可为经济上优化管网供气可靠性提供理论依据。基于故障维修过程，建立了管网运行状态确定模型。最后，提出了一种具有动态特性的系统评价方法。通过评估方法，可以评估实际管道网络的供气可靠性。比较了整个管道网络评估和个人用户评估之间的差异，并给出了组件的重要性排名。评估结果可为经济上优化管网供气可靠性提供理论依据。基于故障维修过程，建立了管网运行状态确定模型。最后，提出了一种具有动态特性的系统评价方法。通过评估方法，可以评估实际管道网络的供气可靠性。比较了整个管道网络评估和个人用户评估之间的差异，并给出了组件的重要性排名。评估结果可为经济上优化管网供气可靠性提供理论依据。评估实际管道网络的供气可靠性。比较了整个管道网络评估和个人用户评估之间的差异，并给出了组件的重要性排名。评估结果可为经济上优化管网供气可靠性提供理论依据。评估实际管道网络的供气可靠性。比较了整个管道网络评估和个人用户评估之间的差异，并给出了组件的重要性排名。评估结果可为经济上优化管网供气可靠性提供理论依据。