Transcript Poster Template - Intelligent Systems Center

Grid Compatibility for Large-Scale Photovoltaic and Wind
Power Systems.
Faculty Advisor(s): Dr. Badrul Chowdhury, Dr. Jonathan Kimball,
ECE Department
Student(s): Anshuman Vaidya, ECE Department
APPROACH
APPROACH
First the Maximum Power Point is tracked for the given
amount of available Solar power.
• Determine the wind speed in the area and calculate
the maximum power that can be captured by the wind
turbine.
OBJECTIVES
• In this project, new converter control techniques will be
developed to improve grid compatibility of solar
photovoltaic plant (PVP) and wind power plants
(WPP).
• The aim is to enable PV and wind power systems with
voltage and frequency regulation capability by
providing active and reactive power reserves in PVP
and WPP.
•
• Keep the pitch angle as low as possible abiding
the rpm limit of the motor.
• Calculate various parameters like TSR(λ), Cp(λ,β).
• Then the system is operated at point slightly lower than
the MPP so as to provide a control over a control over the
active power production.
• One objective is to determine the max available active
and reactive power of PVP/WPP and the associated
capability curves.
• Power converters used in the system can provide/absorb
reactive power as and when needed.
BACKGROUND
RESULTS
•
Determine the Active and Reactive power capability
of the DFIG used by identifying it’s machine
parameters and rated operating values.
3
Power output curve vs
Pitch angle and Speed
• Increasing penetration of renewable sources weakens
the grid because of intermittency.
Power Output (Watts)
2.5
2
1.5
Win speed
14 m/s
12 m/s
1
0.5
•
Ancillary support is needed to counter large
penetrations.
0
25
20
15
10
5
Pitch Angle (Deg)
• Renewable energy sources like WPP and PVP have
untapped capability to support the grid by voltage and
frequency regulation.
0
0
10
20
30
40
50
60
Wind Turbine Speed (RPM)
Wind Turbine Capability Curves for different wind speeds.
1.5
9 m/s
10 m/s
1
11 m/s
Active and Reactive Capability
Curve with different wind speeds
Reactive Power (p.u.)
12 m/s
• Capability of a PVP or WPP system can be analyzed
and matched according to the need.
Absorb active/reactive power when surplus & deliver when
needed.
0.5
13 m/s
14 m/s
0
DFIG
-0.5
-1
-1.5
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Active Power (p.u.)
PhotoVoltaic Plant (PVP) System
Wind Power Plant(WPP) System
DC BUS
CAPACITOR
PV
ARRAY
Boost
Converter
Single Phase
Inverter
G1
GRID
Ipv
Igrid
Duty Cycle
MPPT
Control
Vgrid
Inverter
Control
DC Bus voltage
error feedback (Iref)
Bus
4
Load
1
Load
3
Bus
2
Vpv
Gate Signals
Bus
1
Bus
3
Bus
6
Bus
5
Load
2
FUTURE WORK
•
Active and reactive power capability information of
renewable power plant would help the plant operator
to take an informed decision at the time of crisis.
• Converter control techniques would be developed in
the later stages of this work which would help in
frequency and voltage regulation of the grid.
Acknowledgements
We gratefully acknowledge the support of Intelligent
Systems Center .