WIRELESS POWER TRANSMISSION TECHNOLOGIES FOR SOLAR POWER

SATELLITE

By

Ravi Ghael

OUTLINE

Introduction

Processing Pattern

Demonstration

Conclusion

References

INTRODUCTION

• Solar Power Satellite (SPS) ?

• SPS is the wireless power transmission from the geostationary orbit to the ground.

•“Energy and environment”

•Global problem

•SOLAR POWER

•Concept of the SPS

• The time average power per unit area in space is 5-10 times larger than that on the ground.

Configuration of SPS

Various Types of SPS

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.

• Power transmission

• Transmitting antenna-

beam angle 100 μrad ,

10 μrad pointing accuracy

number of array antenna panels

• Retro-directive technology

DEMONSTRATION OF MICROWAVE POWER TRANSMISSION TOWARDS SPS

• Japan to perform- First experiment in the world as a high-power and long-range microwave transmission

• 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

Sequence of microwave transmission experiment in space

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

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.

QUERIES ?

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