1. Supervisor : Prof. Dr. A. M. Sharaf
Electrical & Computer Engineering Department
University of New Brunswick
Thesis Proposal
Distributed- Dispersed Renewable Energy System
&
Novels Control Strategies By
Abdualah S. Aljankawey
Supervisor : Prof. Dr. A. M. Sharaf

2. Outline
Introduction
Objectives
Work done ?
References
Publications

3. Goals and Objectives
To Model, Simulate and fully Validate number of small scale standalone and grid connected conversion system and control strategies schemes for Renewable power sources alone or in a Hybrid source configuration with robust Interface & Control schemes using power electronic converters
11/9/2018

4. Distributed Power Generation
Our Methodology
Motor
AC Power Grid
AC Electrical Power Consumption
Renewable Energy Sources
Wind Turbine
AC/DC
Rectifier
Main
inverter
Photovoltaic Array
Chopper
DC/DC
Input Filter
Hybrid Load
Control Data Bus AC
Distribution
Bus H 2 O F U E L C
Fuel Cells + -
Electrolyte
Chopper
DC/DC
Unit Controller
Computer
controlled unit
Common
DC Bus AD DA
Distributed Power Generation

5. Work Done WIND ENERGY CONVERSION SCHEMES (WECS)- STANDALONE
CONNECTED TO THE GRID
STANDALON PHOTOVOLTIC ARRAY- DC and DC/AC
STANDALON FUEL CELLS
HYBRID –GREEN POWER RENAWABOLE ENERGY SOURCES

6. Wind Energy Conversion System feeding a localized hybrid load
WIND ENERGY CONVERSION SCHEMES (WECS) AS STANDALONE
Wind
Self Excited
Turbine
Induction B2 B4
Machine B1 V V
3.6 MVA B3 L g
Feeder
Hybrid
5 km
Load
Gear
11 kV
11 kV/25 kV
25 kV/4.16 kV
Box
Linear 40%
Wind
3.6 MVA
Nonlinear 20%
Flow
Self
Motorized 40%
Excited C
3.6 MVA
Capacitor
Controller
with MPF
Wind Energy Conversion System feeding a localized hybrid load

7. Selected AC Power System Parameters Transmission line (5Km )
Wind Turbine Model
Motorized load
Mean wind speed ar the reference height
10 [ m/s]
Active Power
2.6 [MVA]
Localized capacitor bank per phase
[µ f]
Fixed Capacitor
stator resistance
0.016 [ pu] C
89 [uF]
Mutual inductance
[ pu]
Control signals
rotor resistance
0.01 [pu ]
Gamma V 1
Transmission line (5Km )
Gamma I
0.5
Resistance
1.0127*10
Gamma P
La , Lb and Lc
(0.997e-3)*10/60/2/pi [mH]
Time Delay To for P
0.2 [sec]
Linear Load
Time Delay To for I
0.25 [sec]
[MVA]
PI Controller
Reactive Power
0.75e6 [MVA] Kp 55
MPF Filter Ki 5 Rf ]
6puls Diode Lf
500e-3 [H]
Snubber resistance Rs
1e5
Ron
1e-3
Non-Linear Load
Lon
Active power
0.5 [MVA]
3.6 [MVA]

8. Proposed control system
Tri-loop dynamic controller

9. Modulated Power Filter Compensation
Proposed Facts Devise
Modulated Power Filter Compensation
Universal Bridge
6 pulses RL Lf A S2 S1 B C
6 plus
S1= IGBT/D
S2= IGBT/D
MPFC developed by Dr. Sharaf

10. Without (MPFC) with (MPFC)
Some of simulation results with and with out using FACTS solution
Without (MPFC)
with (MPFC) 5 5 4 4 3 3
Voltage ( pu )
Load Voltage ( pu ) 2 2 1 1
0.2
0.4
0.6
0.8 1
0.2
0.4
0.6
0.8 1
Time ( sec)
Time ( sec )

11. WIND ENERGY CONVERSION SCHEMES (WECS) CONNECTED TO THE GRID
Self Excited
Induction Machine
1KV/600v
DC Link
600 V/4.16Kv
Rectifier
inverter l
AC/DC
DC/AC
feeder
AC Voltage
1Kv
Hybrid
Load
Wind
Turbine
3.6MVA
DC Bus
Voltage Feedback
Controller
Controller
Reference
Voltage
Consumer
Kinetic
Energy
Electrical Energy
Mechanical
Energy

12. - a - + S + Pulse generator PI Firing Angle Controller Vdc (pu)
Low pass
Filter a
_ref
Fre_ref 60 - + PI S R
PWM
Vdc (pu) e + -
Timer
Vdc_ref
Vdc_ref
Vabc
Pass Filter
Pulse generator
Rectifier proposed Controller developed in Mathlab/Simulink

13. Proposed Frequency Controller
PLL + -
Kp, Ki
PWM
abc
frequency_ measured
Freq - ref PI
Saturation
Inverter
Frequency controller developed by Mathlab/Simulink

14. Novel Tri-Loop Dynamic Stabilization Controller for Voltage load bus
A 48-pulse voltage source converter STATCOM device is
used .
Controlled by the novel Tri-Loop dynamic controller. The tri
loops are [RMS Load Voltage, RMS Load Current and
instantaneous
It will show up in final defiance

15. DC/DC proposal controller Data-system
Photovoltaic Array
PVA Modeling
System studies
DC/DC proposal controller
Data-system
11/9/2018

16. Main Tasks
Mathematical Models for a PV module to be used in Matlab/Simulink
DC/DC voltage controller
inverter controller
LC Filter Design
Load bus voltage controller

17. Types of PV systems
Grid connected PV power system
Fastest growing applications in developed
Countries
Stand-alone PV power supply (SAPS)
Remote Area PV Power Supply (RAPS)

18. Basic description of the PV-AC-inverter standalone interface scheme
The PV-AC interface scheme comprises of the following components:
Solar array
DC/DC voltage controller
SPWM -6 pulse interface inverter
Input PV side LC filter to filter generated low order harmonics as well as modulating
noise frequencies.
Hybrid three phase load

19. STAND-ALONE PHTOVOLTAIC PV–AC SCHEME
DC/DC
DC/AC VL
Hybrid
Load
DC Link
Linear
Nonlinear
Motorized
Filter C
Controller
Facts and
Controller
Controller
Schematic diagram of a typical Standalone Photovoltaic (PV-AC) System.

20. STANDALONE PHTOVOLTAIC PV–AC SCHEME
The output voltage, current and power of any photovoltaic PV array all vary as a function of the solar insulation/irradiation level (Sx), junction (Ts) and ambient temperature (Ta) as well as the varying electric load demand.

21. BASIC PVA Modeling I ph D C V R s

22. I-V and P-V characteristics of a typical PV array at a fixed
ambient temperature and solar irradiation condition

23. + - DC/DC proposed controller
Variable DC Voltage output needs to adjusted for the grid
Vdc_measured
Vdc-ref
Ki ,Kp + -
PI Controller
Limiter
Gto switch
DC Input
Controlled DC Output
DC-DC Loop error driven Tracking Controller using the Mean dc output PV load Voltage

24. Proposed Inverter Controller
Feedback
voltage
dq-to-abc
dqo Transformation -
Inverter PI +
PWM
dq0
Sin-cos +
Vq_ref
Vd_ref
Feedback
Frequency
sin- cos

25. STANDALON FUEL CELLS

28. FC Electrical Equivalent Model
FC polarization curve
FC equivalent electrical circuit
FC model mathematical representation

29. Fuel Cell Polarization & Power Curve

30. Verification
The proposed stand-alone photovoltaic/wind and hydrogen fuel cells
energy systems and novel control strategies are digitally simulated in
MATLAB/Simulink/ sim power simulation environment using functional
model blocks.
This feasible software is also utilized to design, test and validate the
effectiveness of the proposed dynamic error driven control strategies that
ensure maximum energy utilization minimum impact and high power quality.

31. Progress to date Done Ongoing Ongoing Task Current Progress
Background review
Oct. 31, 2006
Model selecting and testing
Done
Wind as standalone and Grid connected
Modeling of Photovoltaic Array and Digital Simulation
Fuel cells Model
Ongoing
Hybrid model system
Thesis writing
Ongoing

32. References
[1]- Robin Manekshaw Hilloowala”Control and Interface of Renewable Energy System”, Ph D Thesis, 1993, UNB.
[2]- IEC , Ed.1: Wind turbine generator systems—Part 21: “Measurement and Assessment of Power Quality Characteristics of Grid Connected Wind Turbines”, Final Draft International Standard 88/144/FDIS International Electro technical Commission, IEC
[3]- A.M. Sharaf and A.S. Aljankawey, “Voltage Stabilization using FACTS Modulated Power Filter”, Proceedings of the IEEE-ISIE 2006 Conference, Montreal, Quebec, Canada July 2006
[4]- Liang Zhao “Standalone wind Energy Utilization scheme and Novel control Strategies” MSc. Thesis, 2005, UNB.
[5]- Mahomet Uzunoglu, Celal Kocatepe, Recep Yumurtaci, and “Voltage Stability Analysis in the Power Systems Including Non-Linear Loads” European Transactions on Electrical Power, Volume 14, Issue 1, Date: January/February 2004, Pages: 41-56.
[6]- M. Buresch, Photovoltaic Energy Systems Design and Installation, McGraw-Hill, New York, 1983.
[7]- I. H. Altas and A. M. Sharaf, A solar powered permanent magnet DC motor drive scheme, Proc. 17th Annu. Conf. Solar Energy Soc. Canada, Toronto, Ont., Canada, 19.91, pp

33. References
[8]- Mathematical model and characterization of the transient behave of a PEM fuel cell, IEEE, transaction on power electronics,vol.19.No.5, sep2004
[9]- Hybrid fuel- cell strategies for clean power generation, IEEE, transaction on industry Application power electronics,vol.41.No.3, May/June 2005
[10]- Wolfgang Palz, Solar Electricity: An Economic Approach to Solar Energy, Paris: UNESCO, London: Butterworths, BP Solar, “Solar Power Economics,”
[11]- Richard A. Cullen, “What is Maximum Power Point Tracking (MPPT) and How Does it Work?” Dec. 19, 2002.
[12]- Palma, L.; Todorovic, M.H.; Enjeti, P “Design considerations for a fuel cell Powered dc-dc
Converter for portable applications “Applied Power Electronics Conference and Exposition,
2006, APEC’ 06Twenty-First Annual IEEE, March 2006 Page(s):6 pp. Digital Object Identifier /APEC
[13]- Li, Y.H.; Choi, S.S.; Rajakaruna, “The design of the inverter output filter of a Fuel cell Power plant in an isolated system “Power Electronics and Drive Systems, 2003, PEDS
2003, the Fifth International Conference on Volume 1, 17-20 Nov 2003 Page(s):

34. Publication
Proposed Research- Publications (until present)
[1]. A.M. Sharaf and A.S. Aljankawey, “Voltage Stabilization using FACTS Modulated
Power Filter”, Proceedings of the IEEE-ISIE Conference, Montreal, Quebec,
Canada July
[2]. A.M. Sharaf and A.S. Aljankawey “Single phase nonlinear load –power Quality Enhancement
Using Modulated filter compensator [Accepted in Middle East Power System Conference
MEPCON- Dec, 19-21, 2006
[3]. A. M. Sharaf, S.Aljankawey, and I. H. Altas, “A Novel Voltage Stabilization Control Scheme
For Standalone Wind Energy Conversion Systems” [submitted to International Conference on
CLEAN ELECTRICAL POWER Renewable Energy Resources Impact.
Italy - May 22,2007

35. THANK YOU
Questions ?
& Suggestions