1. Dynamic Analysis and Control of Distributed Energy Resources in a Micro-Grid
Farid Katiraei
Ph.D. Candidate
Energy Systems Group, ECE Dept. University of Toronto
Phone:
ECE Graduate Symposium June 24, University of Toronto

2. Overview Introduction: Definition: Challenges: Conclusion
Distributed Energy
Generation
Introduction:
Definition:
Challenges:
Conclusion
Concept
Micro-Grid
Formation
Operation
Control Requirements
Power Management
Transient Performance

3. Distributed Energy GenerationDR
Distributed Resource (DR): Small-scale, modular, power generation units located close to where the energy is used
Underlying DR drivers:
Re-Regulation
Electricity Price Volatility
Environmental Concerns
Power Quality and Reliability
Technological Development
Distributed
Generation (DG)
Distributed
Storage (DS)
Combustion Engines
Gas Turbines
Wind Turbines
Fuel Cells
Solar thermal
Photovoltaic
Low-Head Hydro
Geothermal
Battery Storage
Capacitor Storage
Flywheels
SMES

4. Micro-Grid ~ ~ ~ _ Utility Grid CB Central Power Plant Wind farm
Combined
Generation ~ _
Photovoltaic
Residential
Customers
Battery
Storage
Micro-Turbine
Industrial
Load
Commercial
Customer

5. Micro-Grid Formation and Operation
Grid-Connected
Mode
Islanding Initiation:
Pre-planned switching
Un-planned switching
Islanding
Transition
Islanding Detection
Dynamic Power Balance
Autonomous
Operation
Frequency Restoration
Power Sharing

6. Micro-Grid Challenges
System stability issues
(Angle and Voltage instability)
Power quality issues
(Voltage and Frequency variations)
Power management issues
(Real power sharing, Reactive power requirements)

7. Project Overview System topologies Control strategies
Electronically interfaced DG
Control strategies
Small-signal models
Eigenvalue analysis
Transient analysis
Operating scenarios
Power management
Micro-Grid
Type
Interface requirements
Control systems
DG Units

8. Conclusions Presence of an electronically-interfaced DG unit:
Provide fast/flexible control of Real and Reactive power generation.
Maintains angle/voltage stability of the micro-grid even after severe islanding transients.
Enhance voltage quality at specific bus.
The proposed power management strategies:
Effectively share real power of loads among DR units.
Improve dynamic behavior of the system during islanding transients.
Micro-Grid is a viable option for future power systems.

9. Thank You
Question
Phone:
ECE Graduate Symposium F.katiraei © 2005 University of Toronto