solar power satellite

A Seminar On

Wireless Power Transmission via Solar Power Satellite

Submitted By: Priyanka JainB.E. Final YearE/No : 10/05821Roll No : 2221432

Guided By:Dr. S.S. MehtaProfessorElectrical Engineering

Department Of Electrical Engineering Faculty Of Engineering M.B.M. Engineering College, J.N.V. University, Jodhpur (Raj.) 2014

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WPT via Solar Power Satellite

Overview

History Wireless Power Transmission

Solar Power Satellite

Visualization Challenges Conclusion


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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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Solar Power Satellite 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.


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Space Solar

Power Is preferred

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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

Best ground solar sites are rarely near users

• Space takes up less, well, space

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Advantages over Earth based solar power

Earth Based Solar Power

Space Based Solar Power

More intense sunlight

An SPS would be illuminated over 99% of the time

No need for costly storage devices.

Waste heat is radiated back into space

Less intense sunlight

Costly storage devices needed

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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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How SPS Works??

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Four basic steps involved in the conversion of solar energy to electricity and delivery are:

Step 4

Provide the electricity to the utility grid

Step 3Receive the radio frequency energy on Earth and convert it back to electricity

Step 2Transform the electricity to radio frequency energy and transmit it to Earth

Step 1Capture solar energy in space and convert it to electricity

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Capture solar energy in space

Photovoltaic cellSolar 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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“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.

SPACETENNA: (THE ANTENNA ON SATELLITE)

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“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.

RECTENNNA :(RECTIFYING ANTENNA)

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Rectenna Issues

Size• Miles across

Location

• Aesthetic• Near population

center

Health and

environmental side

effects

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

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

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Overview of System Design

Possible Designs

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.

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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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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”.

Conclusion

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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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Thank You!!

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