Wireless transmission

1. SUBMITTED BY:-
VISHAL INGALE
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2. ◾ Brief study of WIRELESS POWER TRANSMISSON
◾ Introduction to SOLAR POWER SATELLITE
◾ Overview of system design
◾ How SOLAR POWER SATELLITE works
◾ Advantages & Disadvantages
◾ Conclusion
◾ References
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3. ◾ 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.
◾ This Phenomena is also known as ‘Witricity’.
 The three main systems used forWPT are
 PowerTransmission using InductiveCoupling
 Wireless PowerTransmission using Microwave
 WirelessTransfer ofSolar power
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4.  As per the studies , most electrical energy transfer is through
wires and most of the energy loss is during transmission through
wires. On an average , the loss is more than 30% in world. In
India, the loss exceeds 40%.
 Getting rid of bulky wired networks.
 Reduced cost of cables.
 Need for battery is eliminated.
 Maintenance cost is reduced.
 More secure, no risks of getting severe shocks
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5. ◾ 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.
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6. Ground based power transmission
(GPT)
Space based power transmission
(SPT)
SPT is preferred over GPT because:-
1. Energy is available 24 hours a day.
2. No storage required for nighttime power.
3. The energy available in space is 4 -5 times than on earth.
4. No long winter nights, no storms, no cloudy seasons.
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7. ◾ The SPS is a gigantic satellite designed as an electric power plant orbiting
the geostationary earth orbit.
◾ It consists of mainly three segments solar energy collector to convert the
solar energy into DC electricity, DC to microwave converter and larger
antenna array to beam down the microwave power to the ground.
 WHY SOLAR POWER SATELLITE ???
 Increasing global energy demand.
 Environmental problems due to fossil fuels.
 To overcome energy crisis.
 Overcome day and night effect and other factors such as cloud.
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8. ◾ 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.
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9. ◾ Spacetenna is a triangular prism with a length of 800 m and sides
of 100m. 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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10. ◾ An antenna comprising a mesh of dipoles and diodes for
absorbing microwave energy from a transmitter and converting it
into electric power. Microwaves are received with about 85%
efficiency and 95% beam will fall on the Rectenna.
5000 MW RECEIVING STATION IN USA
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12. ADVANTAGES
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 The realization of the SPS concept holds great promises for solving
energy crisis.
 No fuel required.
 Unlimited energy resource.
 Zero Carbon-dioxide emission.
 Solar energy can be more efficiently collected in space.
 Elimination of plant and wildlife interference.
DISADVANTAGES
 Interference with communication satellites.
 The entire structure is massive.
 High cost and require much time for construction

13. ◾ More reliable than ground based solar power.
◾ In order for SPS to become a reality several things have to
happen:
1.Government Support
2.Cheaper launch prices
3.Involement of private sectors
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14. ◾ Ralph H. Nansen solar
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power industries “WIRELESS
POWER TRANSMISSION :The key to solar power
satellites” IEEEAES system magazine , January 1996.
◾ Kaya, N., S. Ida, Y
. Fujino, and M. Fujita, “Transmitting
antenna system for airship demonstration of Space Energy
and Transportation” IEEE Vol.1.
◾ Transmission Technology”, IEEE Microwave Magazine,
December 2002.

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