Tutorial 3

Title: Renewable Energy Systems — Simulation Aspects in PSCAD/EMTDC for Grid Operation
Room: Executive Seminar Room 4.1
Date: 24 November 2008, Monday
Time: 9.00am to 5.00pm

COURSE DESCRIPTION
This workshop will cover selected topics related to the grid integration of renewable energy sources. Those issues that require a detailed analysis based on electromagnetic transient simulations (EMT) will be the main focus. A number of applications areas such as AC transients, faults and protection, Power quality and application of FACTS devices will be discussed.

Course attendees will be able to experiment with the case studies in an interactive hands-on workshop environment using the PSCAD Simulation software. No previous experience with the software is required.

The attendees are encouraged to bring their own laptop.

WHO SHOULD ATTEND?
This course is intended for practicing engineers, graduate students, and researchers in power systems, who are interested in developing an in depth understanding of the modern tools available for the analysis of power systems. The main focus will be on issues related to integration of renewable energy sources.

COURSE TOPICS

Wind Power:

  1. Introduction and over view: Applications of Electromagnetic Transient Simulations.
  2. Introduction and over view: wind energy and simulation requirements
  3. Nature of wind
    • Modeling aspects (gusts, ramps and noise)
    • Impact on the system
      • Illustrative simulation example: Simple grid example and the effect of variable wind.
  4. Wind turbine characteristics
    • Aerodynamic efficiency, power curves and pitch control
      Illustrative simulation example: pitch control of a wind generator connected to the grid.
  5. Wind generators and technology
    • Fixed speed induction generators with stall or pitch control
    • Doubly fed induction generator
    • Synchronous generator or Permanent magnet technology with back to back converters.
      • Illustrative simulation example: Back to back converter based system

  6. Doubly fed induction machine concept
    • Fundamental concepts of a DFIG
    • Control of a DFIG for optimum performance with regard to grid requirements.
      • Maximum power tracking, reactive power control, crow bar protection
    Illustrative simulation example: Model of a simplified DFIG controller.
    Illustrative simulation example: Discussion of a detailed DFIG model in PSCAD and identify key features.

  7. Low voltage ride through (LVRT) of wind generators
    • Gird codes and utility requirements
    • LVRT performance of different generator technologies
      • Induction
      • Synchronous
      • DFIG
    Illustrative simulation example: LVRT performance of different generator technology.

  8. Power quality issues and mitigation techniques
    9. Illustrative simulation example: illustrative example of Power Quality in WG operation
    Illustrative simulation example: Start-up transients including voltage dips

  9. Application of FACTS devices to enhance performance
    10. Illustrative simulation example: Application of FACTS devices to improve power quality

Solar Energy:
Illustrative simulation example: Model of a PV system connected to the grid.
        - Max. Power tracking
        - Harmonics
        - Active filtering

Speaker Biography
Dharshana Muthumuni obtained his B.Sc. (Engineering) with First Class honours from the University of Moratuwa (1993), Sri Lanka and his Ph.D. from the University of Manitoba, Winnipeg Canada(2001). Since 2001, he has been employed at the Manitoba HVDC Research Centre. He has been involved in model development for the electromagnetic transient simulation software, PSCAD/EMTDC, providing technical support and advice on simulation issues and developing simulation methods for new and emerging technology. He has conducted over 50 electromagnetic transient simulation based training courses and workshops over the last five years. His research interests are in the areas of electric machine and transformer modelling, modeling renewable energy and their grid interconnection and protection methods.

Adam Chevrefils obtained his B.Sc. (Engineering) from the University of Manitoba, Canada (2005) and completed his M.Sc. at the University of Manitoba (2008). Since 2007, he has been employed at the Manitoba HVDC Research Centre. In a recent project, he was responsible for the design, simulation, implementation and the testing of an electric off-road, all-terrain vehicle and its customized power electronic drive. His research interests are in the areas of renewable energy and electric vehicle systems.

HVDC Centre:
The Manitoba HVDC research Centre is a fully owned subsidiary of Manitoba Hydro. The HVDC research centre develops and markets the industry standard software, PSCAD/EMTDC. The centre has an active research and development program and one of our main products was the first ever real time digital simulator (RTDS) for system and related applications.

 
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