Description:  DC distribution and transmission systems are a clear trend in electrical networks. The focus of this course is on modeling, control and operation of DC Microgrids, starting with stability and control strategies analyzed in detail, DC droop, virtual impedance concepts and hierarchical control structures for DC microgrids are also introduced. Control of DC-DC and AC-DC converters oriented as DC Microgrid interfaces are evaluated.

Distributed energy storage systems and mature DC output generation systems including distributed energy storage solutions are presented showing their interaction in DC distribution Microgrids. The course also shows examples of DC microgrids in different applications like telecommunication systems, wind power DC collector grid, residential DC electrical distribution systems and hybrid AC-DC microgrids. 

Form of evaluation: The participants will be grouped and asked to team work on several case study scenarios and tasks proposed along the course. The assessment in this course will be done through a final multi-choice test in combination with delivery of exercises reports.

Day 1: DC Microgrids Introduction, Design and Control.

Josep Guerrero (3h), Baoze Wei (2.5h), Abderezak Lashab(1.5h)

Day 2: DC Collector Grids for WPPs and Hierarchical Control of Microgrids

Sanjay Chaudhary (1.5h), Josep Guerrero (1.5h), Baoze Wei (2.5h), Abderezak Lashab(1.5h)

Prerequisites: Knowledge on power electronics modelling, control theory and Matlab/Simulink is recommended for the exercises.

Form of evaluation: The participants will be grouped and asked to team work on several case study scenarios and tasks proposed along the course. The assessment in this course will be done through a final multi-choice test in combination with delivery of exercises reports.

Course literature

1.       Book chapters Chapter 1 & 2 of Microgrids: Modeling, Control, and Applications (Elsevier)

2.       Articles

- J. M. Guerrero, J. C. Vasquez, J. Matas, L. G. de Vicuna and M. Castilla, "Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization," in IEEE Transactions on Industrial Electronics, vol. 58, no. 1, pp. 158-172, Jan. 2011

- T. Dragičević, X. Lu, J. C. Vasquez and J. M. Guerrero, "DC Microgrids—Part I: A Review of Control Strategies and Stabilization Techniques," in IEEE Transactions on Power Electronics, vol. 31, no. 7, pp. 4876-4891, July 2016

- T. Dragičević, X. Lu, J. C. Vasquez and J. M. Guerrero, "DC Microgrids—Part II: A Review of Power Architectures, Applications, and Standardization Issues," in IEEE Transactions on Power Electronics, vol. 31, no. 5, pp. 3528-3549, May 2016

- X. Lu, J. M. Guerrero, K. Sun and J. C. Vasquez, "An Improved Droop Control Method for DC Microgrids Based on Low Bandwidth Communication With DC Bus Voltage Restoration and Enhanced Current Sharing Accuracy," in IEEE Transactions on Power Electronics, vol. 29, no. 4, pp. 1800-1812, April 2014

-X. Lu, K. Sun, J. M. Guerrero, J. C. Vasquez and L. Huang, "State-of-Charge Balance Using Adaptive Droop Control for Distributed Energy Storage Systems in DC Microgrid Applications," in IEEE Transactions on Industrial Electronics, vol. 61, no. 6, pp. 2804-2815, June 2014

- T. Dragičević, J. M. Guerrero, J. C. Vasquez and D. Škrlec, "Supervisory Control of an Adaptive-Droop Regulated DC Microgrid With Battery Management Capability," in IEEE Transactions on Power Electronics, vol. 29, no. 2, pp. 695-706, Feb. 2014

-L. Meng et al., "Review on Control of DC Microgrids and Multiple Microgrid Clusters," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 5, no. 3, pp. 928-948, Sept. 2017.

- V. Nasirian, A. Davoudi, F. L. Lewis and J. M. Guerrero, "Distributed Adaptive Droop Control for DC Distribution Systems," in IEEE Transactions on Energy Conversion, vol. 29, no. 4, pp. 944-956, Dec. 2014

-T. Dragicevic, J. C. Vasquez, J. M. Guerrero and D. Skrlec, "Advanced LVDC Electrical Power Architectures and Microgrids: A step toward a new generation of power distribution networks," in IEEE Electrification Magazine, vol. 2, no. 1, pp. 54-65, March 2014

-N. L. Diaz, T. Dragičević, J. C. Vasquez and J. M. Guerrero, "Intelligent Distributed Generation and Storage Units for DC Microgrids—A New Concept on Cooperative Control Without Communications Beyond Droop Control," in IEEE Transactions on Smart Grid, vol. 5, no. 5, pp. 2476-2485, Sept. 2014.

-X. Lu, K. Sun, J. M. Guerrero, J. C. Vasquez and L. Huang, "Double-Quadrant State-of-Charge-Based Droop Control Method for Distributed Energy Storage Systems in Autonomous DC Microgrids," in IEEE Transactions on Smart Grid, vol. 6, no. 1, pp. 147-157, Jan. 2015.

X. Lu, K. Sun, J. M. Guerrero, J. C. Vasquez, L. Huang and J. Wang, "Stability Enhancement Based on Virtual Impedance for DC Microgrids With Constant Power Loads," in IEEE Transactions on Smart Grid, vol. 6, no. 6, pp. 2770-2783, Nov. 2015

W. Wu et al., "A Virtual Inertia Control Strategy for DC Microgrids Analogized With Virtual Synchronous Machines," in IEEE Transactions on Industrial Electronics, vol. 64, no. 7, pp. 6005-6016, July 2017

A. Lashab, M. Yaqoob, Y. Terriche, J. C. Vasquez and J. M. Guerrero, "Space Microgrids: New Concepts on Electric Power Systems for Satellites," in IEEE Electrification Magazine, vol. 8, no. 4, pp. 8-19, Dec. 2020

H. Snani, M. Amarouayache, A. Bouzid, A. Lashab and H. Bounechba, "A study of dynamic behaviour performance of DC/DC boost converter used in the photovoltaic system," 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC), 2015, pp. 1966-1971

M. Yaqoob, A. Lashab, J. C. Vasquez, J. M. Guerrero, M. E. Orchard and A. D. Bintoudi, "A Comprehensive Review on Small Satellite Microgrids," in IEEE Transactions on Power Electronics, vol. 37, no. 10, pp. 12741-12762, Oct. 2022

E. Rodriguez-Diaz, J. C. Vasquez and J. M. Guerrero, "Intelligent DC Homes in Future Sustainable Energy Systems: When efficiency and intelligence work together," in IEEE Consumer Electronics Magazine, vol. 5, no. 1, pp. 74-80, Jan. 2016

L. Xu et al., "A Review of DC Shipboard Microgrids—Part II: Control Architectures, Stability Analysis, and Protection Schemes," in IEEE Transactions on Power Electronics, vol. 37, no. 4, pp. 4105-4120, April 2022

L. Xu et al., "A Review of DC Shipboard Microgrids—Part I: Power Architectures, Energy Storage, and Power Converters," in IEEE Transactions on Power Electronics, vol. 37, no. 5, pp. 5155-5172, May 2022

 3.       Presentations

Residential DC Microgrids: Latest’s techniques and future perspectives by Dr. Abderezak Lashab https://www.researchgate.net/publication/357206214_Residential_DC_Microgrids_Latest's_techniques_and_future_perspectives

4.       Laboratory introduction handbook (provided via Moodle)

 Organizer:     Professor Juan C. Vasquez, juq@energy.aau.dk

Professor Josep M. Guerrero, joz@energy.aau.dk

Lecturers:      Professor Josep M. Guerrero, AAU Energy 

Associate Professor Sanjay K. Chaudhary, AAU Energy 

Associate Professor Baoze Wei, AAU Energy 

Postdoc Abderezak Lashab, AAU Energy 

ECTS:               2

Date/Time:   April 11-12, 2023

Deadline:       20 March 2023

Place:              AAU Energy, Aalborg

Max no. of participants: 20

Price: 6000 DKK for PhD students outside of Denmark and 8000 DKK for the Industry excl. VAT

Important information concerning PhD courses:

We have over some time experienced problems with no-show for both project and general courses. It has now reached a point where we are forced to take action. Therefore, the Doctoral School has decided to introduce a no-show fee of DKK 3.000 for each course where the student does not show up. Cancellations are accepted no later than 2 weeks before start of the course. Registered illness is of course an acceptable reason for not showing up on those days. Furthermore, all courses open for registration approximately four months before start. This can hopefully also provide new students a chance to register for courses during the year. We look forward to your registrations.