Pressure fluctuations in natural gas networks caused by gas-electric coupling

Michael Chertkov, Michael Fisher, Scott Backhaus, Russell Bent, Sidhant Misra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations

Abstract

The development of hydraulic fracturing technology has dramatically increased the supply and lowered the cost of natural gas in the United States, driving an expansion of natural gas-fired generation capacity in several electrical interconnections. Gas-fired generators have the capability to ramp quickly and are often utilized by grid operators to balance intermittency caused by wind generation. The time-varying output of these generators results in time-varying natural gas consumption rates that impact the pressure and line-pack of the gas network. As gas system operators assume nearly constant gas consumption when estimating pipeline transfer capacity and for planning operations, such fluctuations are a source of risk to their system. Here, we develop a new method to assess this risk. We consider a model of gas networks with consumption modeled through two components: forecasted consumption and small spatio-temporarily varying consumption due to the gas-fired generators being used to balance wind. While the forecasted consumption is globally balanced over longer time scales, the fluctuating consumption causes pressure fluctuations in the gas system to grow diffusively in time with a diffusion rate sensitive to the steady but spatially-inhomogeneous forecasted distribution of mass flow. To motivate our approach, we analyze the effect of fluctuating gas consumption on a model of the Transco gas pipeline that extends from the Gulf of Mexico to the Northeast of the United States.

Original languageEnglish (US)
Title of host publicationProceedings of the 48th Annual Hawaii International Conference on System Sciences, HICSS 2015
EditorsTung X. Bui, Ralph H. Sprague
PublisherIEEE Computer Society
Pages2738-2747
Number of pages10
ISBN (Electronic)9781479973675
DOIs
StatePublished - Mar 26 2015
Externally publishedYes
Event48th Annual Hawaii International Conference on System Sciences, HICSS 2015 - Kauai, United States
Duration: Jan 5 2015Jan 8 2015

Publication series

NameProceedings of the Annual Hawaii International Conference on System Sciences
Volume2015-March
ISSN (Print)1530-1605

Other

Other48th Annual Hawaii International Conference on System Sciences, HICSS 2015
Country/TerritoryUnited States
CityKauai
Period1/5/151/8/15

Keywords

  • Gas-electric coupling
  • Natural gas networks
  • Reliability
  • Stochasticity

ASJC Scopus subject areas

  • Engineering(all)

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