SOLAR POWER SOLAR POWER SATELLITESATELLITE

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SUSMITHASUSMITHA

INTRODUCTIONINTRODUCTION THE DEMAND OF THE ELECTRICAL THE DEMAND OF THE ELECTRICAL

POWERPOWER WHAT IS SPS?WHAT IS SPS? WHY SPS IS USED?WHY SPS IS USED? GENERAL IDEAGENERAL IDEA WIRELESS POWER TRANSMISSIONWIRELESS POWER TRANSMISSION MICROWAVE POWER TRANSMISSIONMICROWAVE POWER TRANSMISSION IN ENVIRONMENTAL ISSUESIN ENVIRONMENTAL ISSUES ADVANTAGES & DISADVANTAGESADVANTAGES & DISADVANTAGES

NEED OF SPSNEED OF SPS THE EARTH BASED SOLAR PANNEL WILL THE EARTH BASED SOLAR PANNEL WILL

RECEIVE A PART OF SOLAR RECEIVE A PART OF SOLAR

THE DAY AND NIGHT ARE THE THE DAY AND NIGHT ARE THE ANOTHER FACTORS EFFECTS ANOTHER FACTORS EFFECTS

INCREASING GLOBAL ENERGY DEMAND INCREASING GLOBAL ENERGY DEMAND IS CONTINUE FOR MANY DECADESIS CONTINUE FOR MANY DECADES

SPS-A GENERAL IDEA

Solar Power Satellites would be located in the geosynchronous orbit

SPSSPS

The difference between existing satellites and SPS

The microwaves would be beamed to the Earth’s surface,

This direct current can then be converted to 50 or 60 Hz alternating current

WIRELESS POWER WIRELESS POWER TRANSMISSIONTRANSMISSION

TRANSMISSION OF ELECTRICAL TRANSMISSION OF ELECTRICAL ENERGY BY WPT IS FAMILIARENERGY BY WPT IS FAMILIAR

The 50 Hz ac power tapped from the grid lines is stepped down to a suitable voltage level for rectification into dc.

Inside the magnetron electrons are emitted from a central terminal called cathode.

A positively charged anode surrounding the cathode attracts the electrons

MICROWAVE POWER TRANSMISSION IN SPS

The microwave transmission system as envisioned by NASA and DOE would have had three aspect

3. The collection of the microwave energy and its conversion into electrical energy at the earth’s surface.

There are mainly three dc-to-RF power converters: magnetrons,

klystrons and solid state amplifiers.

BEAM CONTROLBEAM CONTROL

RECTENNARECTENNA

rectenna is the microwave to dc converting device and is mainly

composed of a receiving antenna and a rectifying circuit.

MICROWAVES-ENVIRONMENTAL ISSUES

SPS would appear as a very bright star in the relatively darknight sky

On the earth, each rectenna for a full-power SPS would be about 10km in diameter

However, the issues related to microwaves continue to be the mostpressing environmental issues.

ADVANTAGES AND DISADVANTAGES

The power could be directed to any point on the earth’s surface

No moving parts. No fuel required No waste product The entire structure is massive. Risks involves in manfunction High cost

conclusionconclusion

Sps will be the central attraction of Sps will be the central attraction of space and energy technologyspace and energy technology