TY - JOUR A1 - Domschke, Pia A1 - Kolb, Oliver A1 - Lang, Jens T1 - Fast and Reliable Transient Simulation and Continuous Optimization of Large-Scale Gas Networks N2 - We are concerned with the simulation and optimization of large-scale gas pipeline systems in an error-controlled environment. The gas flow dynamics is locally approximated by sufficiently accurate physical models taken from a hierarchy of decreasing complexity and varying over time. Feasible work regions of compressor stations consisting of several turbo compressors are included by semiconvex approximations of aggregated characteristic fields. A discrete adjoint approach within a first-discretize-then-optimize strategy is proposed and a sequential quadratic programming with an active set strategy is applied to solve the nonlinear constrained optimization problems resulting from a validation of nominations. The method proposed here accelerates the computation of near-term forecasts of sudden changes in the gas management and allows for an economic control of intra-day gas flow schedules in large networks. Case studies for real gas pipeline systems show the remarkable performance of the new method. Y1 - 2021 U6 - https://doi.org/https://doi.org/10.1007/s00186-021-00765-7 PB - Mathematical Methods of Operations Research ER -