Dynamic Modeling and Interaction of Hybrid Natural Gas and Electricity Supply System in Microgrid

X. Xu, Hongjie Jia, H. D. Chiang, D. C. Yu, D. Wang

Research output: Contribution to journalArticle

111 Citations (Scopus)

Abstract

Natural gas (NG) network and electric network are becoming tightly integrated by microturbines in the microgrid. Interactions between these two networks are not well captured by the traditional microturbine (MT) models. To address this issue, two improved models for single-shaft MT and split-shaft MT are proposed in this paper. In addition, dynamic models of the hybrid natural gas and electricity system (HGES) are developed for the analysis of their interactions. Dynamic behaviors of natural gas in pipes are described by partial differential equations (PDEs), while the electric network is described by differential algebraic equations (DAEs). So the overall network is a typical two-time scale dynamic system. Numerical studies indicate that the two-time scale algorithm is faster and can capture the interactions between the two networks. The results also show the HGES with a single-shaft MT is a weakly coupled system in which disturbances in the two networks mainly influence the dc link voltage of the MT, while the split-shaft MT is a strongly coupled system where the impact of an event will affect both networks.

Original languageEnglish
Pages (from-to)1212-1221
Number of pages10
JournalIEEE Transactions on Power Systems
Volume30
Issue number3
Early online date19 Aug 2014
DOIs
Publication statusPublished - May 2015

Keywords

  • Dynamic modeling
  • hybrid natural gas and electricity system (HGES)
  • interaction
  • microgrid
  • microturbine (MT)
  • natural gas network

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

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