INTEGRATED OPERATION OF AN ENERGY MICROGRID WITH ISLANDED ELECTRICITY NETWORK

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INTEGRATED OPERATION OF AN ENERGY MICROGRID WITH
ISLANDED ELECTRICITY NETWORK

• B. Awad, J. Wu, J. Ekanayake and N. Jenkins
• Centre for Integrated Renewable Energy
  Generation and Supply,
• Cardiff University

2
Background

• The energy policy of the UK
• Renewables, MicroGeneration, CHPs, and District
  heating
• Community energy systems and Energy MicroGrids

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Energy MicroGrid

• An electricity MicroGrid
• A District Heating System.
• Interconnected at the CHP Unit
• Both serve the same group of consumers.
• Generation/demand balancing is a challenge

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Operation of the Energy MicroGrid

• Should heat and electricity networks of the
  Energy MicroGrid be operated as an integrated
  system or as two independent systems?
• Study tool The Integrated Optimal Power Flow

Non-Integrated Operation Integrated Operation
CHP Unit Supply Temperature Constant Variable
CHP Unit Heat-to-Power ratio (function of the supply temperature) Constant Variable
CHP Unit Load following Heat driven Flexible
Electricity to heat conversion Electricity to heat conversion Not available Available
Thermal storage Thermal storage Not available Available
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Case Study

• 24 hours study period
• Islanded electricity network
• IOPF used to produce optimal schedules
• Integrated operation minimises the need to shed
  loads and to curtail generation

Demand shed
Generation curtailed
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Conclusion

• Energy MicroGrids
• Integrated vs. Non-Integrated Operation
• Integrated Optimal Power Flow for Heat and
  Electricity
• Advantages of the Integrated Operation

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