future generation there may will be energy crises. so to avoid these we are going for the technology named solar power plant through space satellite which provides continuous power supply . still research is going on this topic

1. Vardhamancollege of engineering

3. CONTENTS
• Brief study of WPT
• Introduction to SPS
• How SPS works
• Flow chart of solar power transmission
• Advantages & Disadvantages
• Conclusion

4. • The transmission of energy from one place to another
without using wires.
• Conventional energy transfer is
using wires
• But, the wireless transmission is made possible by using
various technologies…..

5. history
WPT
• Sir NICOLAI TESLA: was the first one to propose and
research the idea of wireless transmission in 1899, since than
many scholars and scientists have been working to make his
dream a reality.
 Tesla was able to transfer energy from
one coil to another coil
 He managed to light 200 lamps from a
distance of 40km
SPS
• The SPS concept, originally known as Satellite Solar Power System ("SSPS") was
first described in November 1968.
• In 1973 Peter Glaser was granted for his method of transmitting power over long
distances (e g from an SPS to the Earth's surface) using microwaves from a very
large (up to one square kilometer) antenna on the satellite to a much larger one on
the ground, now known as a Rectenna.

6. i. As per studies, most electrical energy transfer is
through wires.
ii. Most of the energy loss is during transmission
iii. On an average, more than 30%
iv. In India, it exceeds 40%

7. WHY WPT ???
• Reliable
• Efficient
• Fast
• Low maintenance cost
• Can be used for short range or long range
• Reduction of losses during transmission and
distribution of electrical energy.
• Need for grids, substations etc. are eliminated.
• Noble alternative for electrical transmission.

8. IS WPT SAFE???
• Human beings or other objects placed between the transmitter and
receiver do not hinder the transmission of power.
• Magnetic field tend to interact very weakly with the biological
tissues of the body, and so are not prone to cause any damage to any
living being.
1) Ground based power transmission
2) Space based power transmission

9. Space based power transmission
But Space-based power transmission is preferred over Ground
based power transmission
Ground is (obviously) cheaper per noontime watt, but:
· Space gets full power 24 hours a day
. No storage required for nighttime power
· Space gets full power 7 days a week – no cloudy days
· Space gets full power 52 weeks a year
. No long winter nights, no storms, no cloudy seasons
· Space delivers power where it’s needed
. Best ground solar sites (deserts) are rarely near users
· Space takes up less, well, space
. Rectennas can share land with farming or other uses.

10. HOW SPS WORKS???
Solar Power Satellites (SPS) have proposed to collect solar
energy in space and beam it down to the Earth.

11.  Producing electricity from sunlight in space is not a new or
untried technology. What has never been tried before is
transmitting that power back to Earth for our use.
 The Solar Power Satellite (or "Space Solar Power," SPS) is a concept to collect solar
power in space, and then transport it to the surface of the Earth by microwave beam,
where it is converted into electrical power for terrestrial use.
 Being a clean and safe energy design, space-based solar power has the potential to play
a significant role in solving global energy and environmental problems.

12. WHY TO USE SPS ?
• More intense sunlight.
• Unlimited energy resource.
• Energy delivered anywhere in the world.
• Zero fuel cost.
• Zero co2 emission – environment safe.
• Waste heat is radiated back into space.
• No air or water pollution is created during the
generation.
• Concept is simpler than the other most power systems
here on the earth.
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13. ...
• SPS doesn’t use up the valuable surface area
on the earth.
• Solar radiation can be more efficiently
collected.
• Space gets full power 24 hours a day.
• No effect of storms.
• Eco- friendly and maintenance free energy
resource.
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14. Four basic steps involved in the conversion of solar energy
electricity and delivery are:
Capture solar energy in space and convert
it to electricity
Transform the electricity to radio frequency
energy and transmit it to Earth
Receive the radio frequency energy on Earth and
convert it back to electricity
Provide the electricity to the utility grid

15. FLOW CHART OF SOLAR POWER
TRANSMISSION
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16. SOLAR PANEL
• Set of solar photovoltaic modules electrically
connected and mounted on a supporting structure.
• Photovoltaic module is a packaged , connected
assembly of solar cells.
• Solar panels use photons(light energy) from sun to
generate electricity through photovoltaic effect.
• Solar panels were first used in space in 1958.
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17. SPACETENNA: (Antenna on Satellite)
• Spacetenna is a triangular prism with a length of 800 m
and sides of 100 m.
• The transmitting antenna on the horizontal under
surface faces the earth, and the other two sides of the
prism carry solar arrays.
• The faces of prism are embedded with photovoltaic
cells .These cells would convert solar energy into
electricity, which in turn power onboard , Microwave
Generator.
• The microwave thus produced travels through
atmosphere & collected by RECTENNAS on earth.
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18. RECTENNA: (RECTIfying anTENNA)
 mesh of an array of dipole
antennas connected to diodes
converting the radio frequency signal
into DC voltage, which is then
converted into regular AC electricity
which is wired to homes, factories
etc.
It can be considered as a base
station of Geosynchronous satellite.
Microwaves of 2.45 GHz frequency
is used to transmit power from
satellite to rectenna.
. A simple rectenna can be
constructed from a Schottky diode
placed between antenna dipoles as
shown in Fig.
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20. 20

21. 5,000 MW Receiving Station (Rectenna).This
Station is about a mile & a half long in US.
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22. Advantages:
Unlimited energy resource.
Energy delivered anywhere in the world.
Zero fuel cost.
Zero CO2 emission.
Minimum long-range environmental impact.
Solar radiation can be more efficiently collected in
space.
Disadvantages:
Storage of electricity during off peak demand
hours
High initial cost and require much time for
construction.

25. THANK YOU