Fast and Reliable Transient Simulation and Continuous Optimization of Large-Scale Gas Networks
Submission Status: | online in MMOR |
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- 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.