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Convex relaxations for gas expansion planning

Journal Article · · INFORMS Journal on Computing
 [1];  [1];  [1];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. NICTA and ANU, Canberra (Australia)

Expansion of natural gas networks is a critical process involving substantial capital expenditures with complex decision-support requirements. Here, given the non-convex nature of gas transmission constraints, global optimality and infeasibility guarantees can only be offered by global optimisation approaches. Unfortunately, state-of-the-art global optimisation solvers are unable to scale up to real-world size instances. In this study, we present a convex mixed-integer second-order cone relaxation for the gas expansion planning problem under steady-state conditions. The underlying model offers tight lower bounds with high computational efficiency. In addition, the optimal solution of the relaxation can often be used to derive high-quality solutions to the original problem, leading to provably tight optimality gaps and, in some cases, global optimal solutions. The convex relaxation is based on a few key ideas, including the introduction of flux direction variables, exact McCormick relaxations, on/off constraints, and integer cuts. Numerical experiments are conducted on the traditional Belgian gas network, as well as other real larger networks. The results demonstrate both the accuracy and computational speed of the relaxation and its ability to produce high-quality solution

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1296664
Report Number(s):
LA-UR-15-24636
Journal Information:
INFORMS Journal on Computing, Journal Name: INFORMS Journal on Computing Journal Issue: 4 Vol. 28; ISSN 1091-9856
Publisher:
INFORMSCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Efficient dynamic compressor optimization in natural gas transmission systems conference July 2016
Distributed Optimal Gas-Power Flow Using Convex Optimization and ADMM preprint January 2016
Optimizing natural gas pipeline transmission with nonuniform elevation: A new initialization approach journal September 2019
Juniper: An Open-Source Nonlinear Branch-and-Bound Solver in Julia book January 2018
A multilevel model of the European entry-exit gas market journal August 2018
A Multilevel Model of the European Entry-Exit Gas Market journal January 2017
GasLib—A Library of Gas Network Instances journal December 2017

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