solar power satellite system
TRANSCRIPT
IEEE Paper submitted by,
Research Institute for Sustainable Humanosphere,
Kyoto University, Kyoto, Japan
Presentation by,
Harish Rajula
P14EC009
SOLAR POWER IS - INEXAUSTIBLE(RENEWABLE)
ENERGY RESOURCE.
We can, in fact directly convert solar energy into
electrical energy with the use of solar cells, but sunlight
diffuses at night time from the earth.
If the need arises for 24 hours power supply, we are
helpless.
The solution is wireless power transmission from
space through a system consisting of SPS (Solar Power
Satellite) and RECTENNA (RECtifying anTENNA) by
Microwaves
1 Higher efficient
2 Higher accurate
3 lighter weight
4 low cost
5 Phased array with huge number of antenna
elements. To control the beam direction for
effective commercial MPT
1. The phased array and SPS systems is not
stable
2. The satellite is vibrating with period of 14hours
and an amplitude of 80mt.caluculated from
computer simulations
3. The accurate target detection is not possible
4. They proposed a simulation method to correct the
position of sps.
5. PAC method(position and angle correction)
1) They measure the phase of the pilot signal on
the receiver antennas which are put on each
panel structure (as shown in Fig.3.)
2) They calculate the DOA from the phase data
of the received pilot signal and calculate the
inclination of the panel-structure.
3) They estimate the position of the panel
structure.
4) With the inclination and the estimated
position of the panel-structure and with
relationship of the adjacent panel.corrected the
position of the panel.
1.A 1100km altitude equatorial orbit will be used. This choice
minimizes the transportation cost and the distance of power
transmission from space.
2. If it was in GEO (that is, 35,800 kilometers from Earth) then the
receiving antenna would have to be 40 times larger.
3. So satellite has to orbit above the equator in order to have
frequent transmission opportunities. It transmits up to 10Mwatts of
radio-frequency power. Ten satellites placed evenly around the orbit
would require only nine minutes of storage capacity to provide
continuous power.
1. Unaffected by day-night cycle, weather or seasons. Optimized
advances may enable 24 hour power supply per day.
2. This is an eco-friendly, renewable and maintenance free
energy resource unlike the conventional fuels.
3. As the equipment is positioned in space, it is occupies no land
area and remains unaffected by harsh weather conditions.
Rectennas can share land with farms.
4. The spacetenna could direct energy to any rectenna on earth
within the range of its steering angle, which could satisfy the
energy requirements of all the equatorial countries.
5. Waste heat is re-radiated back into space, instead of warming
the earth…
1. Complexity—20 years to complete
2. Size—6.5 miles long by 3.3 miles wide
-Transmitting antenna ½ mile in diameter(1 km)
3. Cost—prototype would have cost $74 billion
4. Microwave transmission
-Interference with other electronic devices
-Health and environmental effects