Optimal inter- and intra-hour scheduling of islanded integrated-energy system considering linepack of gas pipelines

Zhejing Bao, Dawei Chen, Lei Wu, Xiaogang Guo

Research output: Contribution to journalArticlepeer-review

Abstract

In an integrated energy system (IES), such as electricity-heating-gas system, remarkable difference in response time among multiple energy subsystems make the overall energy scheduling a challenging issue. Meanwhile, storage capabilities, such as inherent storage capability of gas pipelines, provide a potential way to improve system scheduling flexibility. In this paper, an optimal scheduling approach for IES operated in an islanded mode is developed, while covering inter- and intra-hour timescales simultaneously. Specifically, in inter-hour timescale, steady-state models of individual energy subsystems are used, and the heuristic particle swarm optimization (PSO) is integrated into the decomposition-based sequential multi-energy flow (MEF) calculation to derive optimal scheduling of CHPs and flow rates of gas sources with respect to forecasts of renewable energy sources (RESs); While in intra-hour timescale, with the dynamic model of gas flows, the optimal range of pressure of gas source node is scheduled to ensure robustness against RES uncertainties while leveraging storage capabilities of gas pipelines. An integrated energy test system is studied to demonstrate effects of integrated inter-hour and intra-hour schedules in handling different dynamic response time and effects of storages capabilities of gas linepack in achieving robust operation against uncertainties.

Original languageEnglish
Pages (from-to)326-340
Number of pages15
JournalEnergy
Volume171
DOIs
StatePublished - Mar 15 2019

ASJC Scopus subject areas

  • General Energy
  • Mechanical Engineering
  • Pollution
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law
  • Building and Construction
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Civil and Structural Engineering
  • Modeling and Simulation

Keywords

  • Integrated energy system (IES)
  • Multi-energy flow (MEF)
  • Particle swarm optimization (PSO)
  • Scheduling
  • Uncertainty

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