Its about Solar Power Satellite.. We wiil meet soon as world is running out of fossil fuels

1. A
Seminar On
Wireless Power Transmission
via Solar Power Satellite
Submitted By: Priyanka Jain
B.E. Final Year
E/No : 10/05821
Roll No : 2221432
Guided By:
Dr. S.S. Mehta
Professor
Electrical Engineering
Department Of Electrical Engineering
Faculty Of Engineering
M.B.M. Engineering College,
J.N.V. University, Jodhpur (Raj.)
2014

2. Overview
History Wireless
Power
Transmission
Solar Power
Satellite
Visualization Challenges Conclusion
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3. History…
 Nikola Tesla in late 1890s, Pioneer of induction
techniques.
 His vision for “World Wireless System”.
 In 1940s ability to convert energy to
microwaves was developed.
 In 1964 William C. Brown demonstrated a
Rectenna.
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4. Solar Power Satellite
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 In 1968 idea for solar power satellites was proposed by
Peter Glaser.
 Between 1978 and 1981, the Congress authorized
the Department of Energy (DoE).
 In 1999, NASA's Space Solar Power Exploratory
Research and Technology program (SERT) was initiated.
 On Nov 2, 2012, China proposed space collaboration with
India that mentioned SBSP.

5. WPT via Solar Power Satellite
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Space Based Solar
transmission
Ground Based Power
Transmission

6. Why??
Space gets full
power 24 hours
a day
•3X or more
Watt-hours per
day per peak
watt
•No storage
required for
nighttime
power
Space gets full
power 7 days a
week
•Space gets full power
52 weeks a year
•No long winter nights,
no storms, no cloudy
seasons
•Space delivers power
where it’s needed
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Best ground
solar sites are
rarely near
users
•Space takes up
less, well, space

7. Advantages over Earth based solar power
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Earth Based Solar
Power
Space Based Solar
Power

8. Solar Power Satellite
Solar Power Satellites (SPS) have proposed to collect solar
energy in space and beam it down to the Earth.
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9. How SPS Works??
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10. Four basic steps involved in the conversion of solar
energy to electricity and delivery are:
Step 1
Capture solar energy in space and convert it to electricity
Step 2
Transform the electricity to radio frequency energy and transmit it to Earth
Step 3
Receive the radio frequency energy on Earth and convert it back to electricity
Step 4
Provide the electricity to the utility grid
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11. Capture solar
energy in space
Photovoltaic
cell
Solar radiation can be more efficiently collected in space, where it is roughly three
times stronger than on the surface of the Earth. Most of these systems
would utilize photovoltaic (PV) cells similar to those on Earth-based systems.
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12. SPACETENNA: (THE ANTENNA ON SATELLITE)
“An antenna is an electrical device which converts electric power into radio
waves.
 The transmitting antenna on the horizontal under-surface faces the Earth, and the
other two sides of the prism carry solar arrays.
 The Microwave thus produced Travels through Atmosphere & is collected by
RECTENNAS on Earth.
 The Spacetenna has a square shape whose dimension is 132 meters by 132 meters
and which is regularly filled with 1936 segments of sub array.
 There will be about 2.6 million antenna elements in the spacetenna.
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13. RECTENNNA :(RECTIFYING ANTENNA)
“An antenna comprising a mesh of dipoles and diodes for absorbing
microwave energy from a transmitter and converting it into electric
power.”
 Microwaves of 2.45 GHz frequency are used to transmit power
from the satellite to the rectenna.
 Microwaves are received with about 85% efficiency.
 Diameter is around 5km .
 95% of the beam will fall on the rectenna.
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14. Rectenna Issues
Location
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Size
• Miles across
• Aesthetic
• Near population
center
Health and
environmental
side effects

15. 5,000 MW Receiving Station
(Rectenna). This station is about a
mile and a half long.
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5,000 MW Receiving Station (Rectenna).
This station is about a mile and a half long.

16. Overview of System Design
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17. Possible Designs

18. Visualizing Space Solar Power
 Project in Development in Japan.
 SunSat Design Competition, an international contest with
prizes. The Competition is intended to generate imaginative and
plausibly workable designs for the next-generation space satellite
systems.
 Goal is to build a low cost demonstration model by 2025.
 8 Countries along the equator have agreed to be the site of a
rectenna.
 If microwave beams carrying power could be beamed uniformly over the
earth they could power cell phones.

19. Challenges
 Geosynchronous satellites would take up large sections of space
 Interference with communication satellites
 Possible health hazards
 Effects of long term exposure
 Exposure is equal to the amount that people receive from cell
phones and microwaves
 Location
 The size of construction for the rectennas is massive
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20. Conclusion
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This technology is still in development but with
support it will become operation of reality providing a
new source of clean energy.
“ Will be a boon as we are
running out of fossil fuels”.

21. References
[1] Matsumoto, H., “Research on Solar Power Station and Microwave Power
Transmission in Japan : Review and Perspectives”, IEEE Microwave Magazine,
December 2002.
[2]Shinohara, N., J. Fujiwara, and H. Matsumoto, “Development of Active
Phased Array with Phase-controlled Magnetrons”, Proc. ISAP2000, Fukuoka,
vol.2, 2000.
[3]www.spacefuture.com
[4]Space journal at OHIO -issue18.
[5]http://www.nss.org/settlement/ssp/
[6]www.powersat.com
[7]http://www.factindex.com/m/mi/microwave_power_transmission.html
[8]Space Power, SPS Timeline,<http://www.spacefuture.com/power/timeline.shtml
[9]http://www.fact-index.com/m/mi/microwave_power_transmission.html
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22. 22
Thank You!!
WPT via Solar Power Satellite