1. by Weihua Wang Supervisor: Prof.Dr.A.M.Sharaf
Thesis Proposal Novel FACTS Based Schemes for Distribution Networks with Distributed / Dispersed Renewable Wind Energy
by Weihua Wang
Supervisor: Prof.Dr.A.M.Sharaf

2. Outline Introduction Motivations Objective and significance
System description
Methodology
Progress to date
Sample study
Reference

3. Introduction Wind is a renewable energy source kinetic Mechanical
Load
kinetic
Energy
Mechanical
Energy
Electrical
Energy

4. Introduction Wind is also a clean energy source carbon dioxide sulfur
particulates

5. Introduction
Wind energy is a promising energy and becomes increasingly popular.
By 2005, the worldwide capacity had been increased to 58, 982 megawatts
World Wind Energy Association expects 120,000 MW to be installed globally by 2010.

6. Introduction Total installed wind power capacity
（data from World Wind Energy Association)

7. Introduction Wind Energy Conversion Scheme (WECS)
Stand alone
Grid Integration
Distributed/Dispersed Renewable Wind Energy
Located close to where the power is needed
Low reliability

8. Motivations Energy crisis Environmental Issues
Shortage of conventional fuel based energy
escalating prices
Environmental Issues
Greenhouse gas emission
Acid rain
Water pollution

9. Motivations
Large wind farm emerging (in the range of several megawatts )
Many new interface requirements regarding the full integration of large dispersed wind power into the power grid

10. Motivations
Challenges for dispersed wind energy integrate into the distribution network
Wind power injected into the grid is highly variable
Electrically weak distribution networks
- Radial meshed
- Large R/X ratio distribution line
WECS that employed induction machine may bring heavy reactive burden to the grid

11. Objectives
Validating the effectiveness of several FACTS based schemes developed by Dr. Sharaf, for
Reactive power compensation
Power factor correction
Harmonic reduction
In distribution networks with dispersed renewable wind energy integrated

12. Significance
provide the industrial branches with more alternative countermeasures that can pave the way for the gird integration of renewable wind energy
ease the environmental pollution by reducing the demand of power generated by fossil fuel

13. System description

14. System Description
Wind turbine model based on the steady-state power characteristics of the turbine
S -- the area swept by the rotor blades
v -- the wind velocity
ρ--air density

15. System Description
tip speed ratio λ, which is the quotient between the tangential speed of the rotor blade tips and the undisturbed wind velocity
C1=0.5176, C2=116, C3=0.4, C4=5, C5=21 and C6=0.0068

16. System Description WECS Controller Controller MPFC UPFC STATCOM
IGBT
WECS

17. Methodology Simulation Environment: MATLAB/SIMULINK
Using discrete simulation mode with a sample time of 0.1 milliseconds
Parameters optimization: off-line Trial-and-Error method

18. Progress to date Task Expected end date Background review
Nov. 31, 2006
The prototype model of proposed system without any FACTS devices
Done
Modeling of MPFC and Digital Simulation
Modeling of STATCOM and Digital Simulation
Nov. 30, 2006
Modeling of UPFC and Digital Simulation
Dec. 19, 2006
Thesis writing and compilation
Jan. 31, 2007

19. Sample study 11 kV distribution networks
With 3.6MW renewable wind energy integrated
Feeder 3 km/section
R=0.25Ω/km, L=0.93mH/km
4 Linear loads at power factor 0.8 lagging (2MVA each)
600 kVA induction motor
Static power converter type nonlinear load (2 MVA)

20. Sample proposed dynamic tri-loop error driven controller
Sample study
Sample proposed dynamic tri-loop error driven controller

21. Sample study Simulation duration: 0.8 seconds
Sequence of system excursions :
t = 0.1s Induction motor was switched off at bus 5
t = 0.2s Induction motor was switched on at bus 5
t = 0.3s Linear load was switched off at bus 4
t = 0.4s Linear load was switched on at bus 4
t = 0.5s wind speed decreased to 9 m/s
t = 0.6s wind speed increased to 21 m/s
t= 0.7s wind speed returned to 15 m/s

22. Sample resultsSystem dynamic responses at bus 5

23. Reference
[1] Siegfried Heier, 'Grid Integration of Wind Energy Conversion Systems', 1998, John Wiley & Sons Ltd.
[2] Mohamed S. ElMoursi and Adel M. Sharaf, 'Novel STATCOM Controllers for Voltage Stabilization of Stand Alone Hybrid (Wind/Small Hydro) Schemes', International Journal of Emerging Electric Power Systems, 2006, Vol.7, No. 3, Article 5
[3] A.M. Sharaf and Weihua Wang, 'A Low-cost Voltage Stabilization and Power Quality Enhancement Scheme for a Small Renewable Wind Energy Scheme', Proceedings-International Symposium on Industrial Electronics 2006, ISIE 2006
[4]The World Wind Energy Association (WWEA) web site, '
[5]El-Moursi, M.S. and Sharaf, A.M. , 'Novel STATCOM controllers for voltage stabilisation of wind energy scheme', Int. J. Global Energy Issues, 2005

24. Reference
[6]Paul S. Veers,.Thomas D. Ashwill, Herbert J. Sutherland, Daniel L. Laird and Donald W. Lobitz, ‘Trends in the design, manufacture and evaluation of wind turbine blades’, Wind Energy, 2003; Vol 6: P
[7] Robert W. Thresher and Darrell M. Dodge, ‘Trends in the evolution of wind turbine generator configurations and systems’, Wind Energy, Vol 1: p70-85, 1998
[8] N. Dizdarevic and M. Majstrovic, 'FACTS-based reactive power compensation of wind energy conversion system', 2003, IEEE Bologna PowerTech (IEEE Cat. No.03EX719), pt. 2, p 8 pp. Vol.2
[9] Domenico Villacci, Gianluca Bontempi and Alfredo Vaccaro, 'An adaptive local learning-based methodology for voltage regulation in distribution networks with dispersed generation', IEEE Transactions on Power Systems, Vol.21, No.3, August 2006

25. Reference
[10] Stavros, A. Papathanassiou and Michael P. Papadopoulos, 'Harmonic Analysis in a Power System with Wind Generation', IEEE Transactions on Power Delivery, VOL. 21, NO. 4, OCTOBER 2006
[11] Narain G. Hingorani and Laszlo Gyugyi, 'Understanding FACTS: concepts and techonology of flexible AC transmission system', 2000, Institute of Electrical and Electronics Engineers, Inc.
[12]Guosheng Wang, 'Novel Control Strategies and Interface Converters for Stand-alone Wind Energy Conversion Schemes', MSc.E Thesis, 2004, UNB.
[13]Liang Zhao “Standalone wind Energy Utilization scheme and Novel control Strategies” MSc.E Thesis, 2005, UNB.

26. Reference
[14] F.G.R. de Campos and A.A.Jr.Penteado, 'Wind energy generation simulation with asynchronous generator connected to ENERSUL distribution system', 2004 IEEE/PES Transmision and Distribution Conference and Exposition: Latin America (IEEE Cat. No. 04EX956), 2004, p

27. THANK YOU

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