1. Design of dc converter with photovoltaic array
PREPARED BY :
*MUSTAFA KULLAB
*MOHAMEAD YAMMAN FATTAL
*MOHAMEAD WELID ALQATY
Supervisor :
Dr WKaa Farman Ahmed

2. Introduction :
Photovoltaic cells, commonly known as solar cells, are semiconductor devices that convert sunlight directly into electricity.
Efficiency range from a few percent to above 40%.
Low maintenance, long lasting sources of energy
Provides cost-effective power supplies for people remote from the main electricity grid.
Non-polluting and silent sources of electricity.
Renewable and sustainable power, as a means to reduce global warming.

3. Figure 1 : block diagram of PV system with DC/DC converter

4. Photovoltaic Cells
The four general types of silicon photovoltaic cells are:
Single-crystal silicon.
Polycrystalline silicon.
Ribbon silicon.
Amorphous silicon.

5. Hybrid connection of photovoltaic module
(Series and Parallel)
Figure 2: Modules in a Parallel-Series Array with Bypass Diodes and Isolation Diodes

6. Figure3 : current –voltage carve
MAXIMUMM POWER POINT
with constant temperature and irradiation
Figure3 : current –voltage carve

7. Figure4 : current –voltage carve
MAXIMUMM POWER POINT
with constant temperature and varying irradiation
Figure4 : current –voltage carve

8. Figure5 : current –voltage carve
MAXIMUMM POWER POINT
with constant irradiation and varying temperature
Figure5 : current –voltage carve

9. MAXIMUMM POWER POINT

10. DC/DC CONVERTER - DC CHOPPERS TOPOLOGIES
Buck Converter
Boost Converter
Vo=DVs
Figure 6 : Buck Converter circuit
Figure 7 : Boost Converter circuit

11. DC/DC CONVERTER - DC CHOPPERS
TOPOLOGIES
Buck/Boost Converter
Figure 8 :Buck/Boost Converter

12. Thank you