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WIRELESS POWER TRANSMISSION TECHNOLOGIES FOR SOLAR POWER
SATELLITE
By
Ravi Ghael
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OUTLINE
Introduction
Processing Pattern
Demonstration
Conclusion
References
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INTRODUCTION
• Solar Power Satellite (SPS) ?
• SPS is the wireless power transmission from the geostationary orbit to the ground.
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•“Energy and environment”
•Global problem
•SOLAR POWER
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•Concept of the SPS
• The time average power per unit area in space is 5-10 times larger than that on the ground.
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Configuration of SPS
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Various Types of SPS
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MICROWAVE POWER TRANSMISSION FOR SPS
• Microwave frequency for SPS has been selected in a range of 1-10 GHz
• Compromising between antenna size and atmospheric attenuation.
• For the microwave generator, tubes such as magnetron, klystron, and TWT are proposed.
• Semiconductor amplifier- 60-70 % with low cost expectation.
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• Power transmission
• Transmitting antenna-
beam angle 100 μrad ,
10 μrad pointing accuracy
number of array antenna panels
• Retro-directive technology
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DEMONSTRATION OF MICROWAVE POWER TRANSMISSION TOWARDS SPS
• Japan to perform- First experiment in the world as a high-power and long-range microwave transmission
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• Microwave transmitter- 4 panels
• Each panel, 0.6m x 0.6m
• Freq. of each panel is synchronized by a master oscillator
• Phase is adjusted by Rotating Element Electric Field Vector
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Sequence of microwave transmission experiment in space
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ADVANTAGES
• Power loss for wireless power transmission is expected less than 50%
• Average power per unit area in space is 5-10 times larger than that on the ground
• Will be a boon as we are running out of fossil fuels
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CONCLUSION
• One of the most critical technologies for the SPS is microwave power transmission
• High efficiency
• extremely high-precise beam control with 10 μrad accuracy.
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QUERIES ?
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BIBLIOGRAPHY
[1] P.E.Glaser, “Power from the Sun: Its Future”, Science, vol.162,pp.867-886, 1968.
[2] DOE/NASA, “Program Assessment Report Statement of Finding - Satellite Power Systems, Concept Development and Evaluation Program”, DOE/ER-0085, 1980.
[3] R.M.Dickinson, “Performance of a High-Power, 2.388-GHz Receiving Array in Wireless Power Transmission Over 1.54km”, 1976 IEEE MTT-S International Microwave Symposium Digest of Technical Papers, pp.139-141, 1976.
[4] S.Sasaki, K.Tanaka and Advanced Mission Research Group, “SSPS Technologies Demonstration in Space”, IAC-10.C3.4.1,61st International Astronautical Congress, Prague, Sep.-Oct.2010