A Unified View on Relaxations for a Nonlinear Network Flow Problem
A Unified View on Relaxations for a Nonlinear Network Flow Problem
复制标题
非线性网络流问题松弛的统一观点
DOI:
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发表时间:
2013
期刊:
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通讯作者:
Jesco Humpola
中科院分区:
文献类型:
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作者:
A. Fügenschuh;Jesco Humpola
We consider a nonlinear nonconvex network flow problem that arises, for example, in natural gas or water transmission networks. Given is such network with active and passive components, that is, valves, compressors, pressure regulators (active) and pipelines (passive), and a desired amount of flow at certain specified entry and exit nodes of the network. Besides flow conservation constraints in the nodes the flow must fulfill nonlinear nonconvex pressure loss constraints on the arcs subject to potential values (i.e., pressure levels) in both end nodes of each arc. The problem is how to numerically compute this flow and pressures. We review an existing approach of Maugis (1977) and extend it to the case of networks with active elements (for example, compressors). We further examine different ways of relaxations for the nonlinear network flow model. We compare different approaches based on nonlinear optimization numerically on a set of test instances.