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Electric Power Systems Research | Electrical Energy Laboratory, Ghent University

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Overview of electric power sytems research at the Electrical Energy Laboratory of Ghent University, Belgium.

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Electric Power Systems Research | Electrical Energy Laboratory, Ghent University

  1. 1. Electric Power Systems Research Electrical Energy Laboratory Ghent University Prof. dr. ir. Lieven Vandevelde Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 1
  2. 2. Overview 1. Grid support via power electronic converters 2. Smart microgrids 3. Ancillary services (by wind turbines) 4. CO2 neutrality of business parks 5. Virtual Power Plants 6. Renewable energy: wind and wave energy Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 2
  3. 3. Grid support via power electronic converters Control of grid-connected converters: • Power Quality (harmonics, unbalance) • Ancillary services Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 3
  4. 4. “Damping” control strategy  Injection of highest current in the phase with lowest voltage Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 4
  5. 5. Influence of converter control on distribution network Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 5
  6. 6. Smart microgrids Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 6 Modes of operation:  grid-connected  stand-alone (islanded) Cluster of:  distributed generation  storage  loads
  7. 7. Smart microgrids Voltage-based droop control 1. Generators 2. Loads and storage units Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 7
  8. 8. Voltage based droop control strategy Vg/Vdc-droop control strategy pag. 8Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory
  9. 9. Voltage based droop control strategy Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 9
  10. 10. Voltage based droop control strategy • Taking into account characteristics of microgrids •Low inertia  Vdc Cdc •Resistive lines  P/V link •Intermittent sources  constant-power band • No communication for primary control Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 10
  11. 11. Voltage based droop control strategy • Smart transformer: primary control of power exchange microgrid-distribution grid • VBD control in grid connected mode: • Soft curtailment, decrease grid losses • Avoiding on-off oscillations of DG • Transition grid-connected – islanded • Implications on the market – opportunities & constraints • Protection in microgrids Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 11
  12. 12. Ancillary services (by wind turbines) • Frequency: • (primary) frequency control • Inertial response • Voltage control • Congestion • Power Quality • Stability Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 12
  13. 13. CO2 neutrality of business parks Secondary control: e.g. virtual islanded operation (minimisation of exchange between business park and utility grid) • Loads o demand response • Generators o deviation from MPP • Storage o dedicated storage devices o buffering (also thermal) Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 13
  14. 14. Virtual Power Plants (VPP) Aggregation of various distributed generation units into a VPP Commercial: “Capture the value of flexibility” Technical: Ancillary services (e.g. congestion management) Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 14
  15. 15. Control of power electronic converters for wind energy: •Current control •Maximum Power Point Tracking (MPPT) Aim: improvement of the efficiency Wind energy Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 15
  16. 16. Small Wind Turbine Field Laboratory @ Greenbridge Science Park of Ghent University, Oostende (B) Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 16
  17. 17. Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 17 Wave energy FlanSea Flanders Electricity from the Sea • Wave energy converter for moderate sea climate • Aim: development of a concept – economic feasibility • Consortium: 6 Flemish companies – Ghent University • Period: 2010-2013
  18. 18. Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 18 Principle • Point absorber • Bouy – anchor on seabed • Vertical movement -> rotation of the winch • Full Electrical Power Take-Off (PTO) • Intelligent control: optimal power extraction
  19. 19. Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 19 From lab to sea…
  20. 20. Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 20 Projects: • INCREASE (FP7) – www.project-increase.eu Increasing the Penetration of Renewable Energy Sources in the Distribution Grid by Developing Control Strategies and Using Ancillary Services • WINDUR (FP7-SME) – www.project-windur.eu Small Wind Turbine for Urban Environments • SWIFT: Smart Wind Farm Control • OptiWind: Serviceability Optimisation of the Next Generation Offshore Wind Turbines • M2E2S: Multiscale Modelling of Electrical Energy Systems • ACE - www.ace-low-carbon-economy.eu
  21. 21. Electric Power Systems Research Faculty of Engineering and Architecture – Electrical Energy Laboratory 21 Prof. dr. ir. Lieven Vandevelde Dr. ir. Tine Vandoorn Dr. ir. Bart Meersman Electrical Energy Laboratory Dept. of Electrical Energy, Systems and Automation Ghent University Technologiepark-Zwijnaarde 913, 9052 Gent, Belgium www.ugent.be/ea/eesa Lieven.Vandevelde@UGent.be Tine.Vandoorn@UGent.be Bart.Meersman@UGent.be Contact

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