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This is lecture about Overview of Microgrids.
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Incheon National UniversityNguyen Van Vinh
Report No. 10
Overview of Microgrids
The Basic Concept of Microgrid
Definition and Classification of Microgrid
Advantage and Challenges of Microgrid
Microgrid Control
Purpose of Control
Grid-Connected Mode
Islanded Mode
Design control scheme for Grid-Connected and Islanded
operation modes
Contents
What is a Microgrid ?
Distributed generationLoadsEnergy storage systems
Microgrid central control
Point of common coupling
Mahmoud, M. S., S. Azher Hussain, and M. A. Abido. "Modeling and control of microgrid: An overview." Journal of the Franklin Institute 351.5 (2014): 2822-2859.
Classification of Microgrid
Justo, Jackson John, et al. "AC-microgrids versus DC-microgrids with distributed energy resources: A review." Renewable and Sustainable Energy Reviews 24 (2013): 387-405.Liu, Xiong, Peng Wang, and Poh Chiang Loh. "A hybrid AC/DC micro-grid."IPEC, 2010 Conference Proceedings. IEEE, 2010.
Microgrid of advantage
Ability to separate from main grid during disturbance
Reduce the emission
Reduce electricity cost
Microgrid challenges
Maintenance and space required for battery bank
Synchronization with main grid
Uncertainty of wind and PV power
Protection of microgrid
Advantage and Challenges of Microgrid
Hartono, B. S., Y. Budiyanto, and R. Setiabudy. "Review of microgrid technology." QiR (Quality in Research), 2013 International Conference on. IEEE, 2013.
Grid-connected mode
Real and reactive power control
• Smoothing wind power
• Power at point of common
coupling (PCC)
Island mode
Isolated from main grid
Frequency and Voltage control
Microgrid Operation Model
Nikos Hatziargyriou. "Microgrids: Architectures and Control.“ ISBN: 978-1-118-72064-6, 344 pages, December 2013, Wiley-IEEE Press.
Grid-Connected Model
Delghavi, Mohammad Bagher. "Advanced Islanded-Mode Control of Microgrids." (2011).
Islanded Model
Delghavi, Mohammad Bagher. "Advanced Islanded-Mode Control of Microgrids." (2011).
Basic Model in Microgrid
GridAC source [380 0 60]
MG
Point of common coupling
Scope
Wind Generator[380 0 60]
[P=130kW QL=0 VAR]
BESS[800Vdc 60(Hz)]
[P=50 kW QL=0 VAR]
Diesel[P= 200 kW Q= 30 kVAR]
RL Load[380(V) 60(Hz)]
[P=350kW Q=30kVAR]
Inner in BESS Block
PWM
Outer control Inner control
Simulation Results