Hierarchical energy management system for multi-source multi-product microgrids

Xiandong Xu*, Hongjie Jia, Dan Wang, David C. Yu, Hsiao-Dong Chiang

*Corresponding author for this work

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

This paper proposes a hierarchical energy management system for multi-source multi-product (MSMP) microgrids. Traditional energy hub based scheduling method is combined with a hierarchical control structure to incorporate transient characteristics of natural gas flow and dynamics of energy converters in microgrids. The hierarchical EMS includes a supervisory control layer, an optimizing control layer, and an execution control layer. In order to efficiently accommodate the systems multi time-scale characteristics, the optimizing control layer is decomposed into three sub-layers: slow, medium and fast. Thermal, gas and electrical management systems are integrated into the slow, medium, and fast control layer, respectively. Compared with wind energy, solar energy is easier to integrate and more suitable for the microgrid environment, therefore, potential impacts of the hierarchical EMS on MSMP microgrids is investigated based on a building energy system integrating photovoltaic and microturbines. Numerical studies indicate that by using a hierarchical EMS, MSMP microgrids can be economically operated. Also, interactions among thermal, gas, and electrical system can be effectively managed.

Original languageEnglish
Pages (from-to)621-630
Number of pages10
JournalRenewable Energy
Volume78
Early online date11 Feb 2015
DOIs
Publication statusPublished - Jun 2015

Keywords

  • Dynamics
  • Energy hub
  • Hierarchical control structure
  • Multi time-scale

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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