Wireless Power Transmission via Solar Power Satellite

Submitted to:Mrs. Archana Singh ( Head of Dept.)Ms. Aarti Gupta ( Assistant Professor )Mr. Prakash Chandra ( Assistant Professor )

Submitted by:Akanksha Gupta 13EE004Electrical Engineering

What is WPT?“Wireless power transfer” is a collective

term that refers to the transmission of

energy by means of electromagnetic

fields from a power source to

an electrical load, such as an electrical

power grid or a consuming device,

without the use of discrete human-

made conductors.

History• Nikola Tesla in late 1890’s gave the concept of Witricity.

• He was able to transfer energy from one coil to another

coil.

• He managed to light 200 lamps from a distance of 40 km.

• The idea of Tesla is taken into research after 100 years by

a team led by Marin Soljacic from MIT.

Why WPT?• Getting rid of bulky wired networks.

• Reduced cost of cables.

• Need for battery is eliminated.

• Maintenance cost is reduced.

• More secure, no risks of getting severe shocks.

• Distribution as well as transmission problems.

Is WPT Safe? • Human beings or other objects placed between the

transmitter and receiver do not hinder the transmission of

power.

• Magnetic field tend to interact very weakly with the

biological tissues of the body, and so are not prone to

cause any damage to any living being.

Types of WPTGround based power transmission Space based power transmission

Space based power transmission

Space based power transmission is preferred over

ground based power transmission because:-

• Energy is available 24 hours a day.

• No storage required for night-time power.

• The energy available in space is 4-5 times than on earth.

• No long winter nights, no storms, no cloudy seasons.

WHY SPS?• Increasing global energy demand.

• Environmental problems due to fossil fuels.

• To overcome energy crisis.

• Overcome day and night effect and other factors such

as cloud.

Introduction to Solar Power Satellite

• The SPS is a gigantic satellite designed as an electric power plant

orbiting the geostationary earth orbit.

• It consists of mainly three segments:-

a. solar energy collector to convert the solar energy into DC

electricity.

b. DC to microwave converter.

c. larger antenna array to beam down the microwave power to the

ground.

How SPS works?

Overview of system design• Solar panel:- Set of solar photovoltaic modules

electrically connected and mounted on a supporting structure.

• Spacetenna (antenna on satellite):- A triangular prism with length of 800 m and sides of 100 m, faces of which are embedded with photovoltaic cells.

• Rectenna (rectifying antenna):- An antenna consisting of a mesh of dipoles and diodes for absorbing microwave energy from a transmitter and converting it into electric power.

ADVANTAGES• The realization of the SPS concept holds great promises

for solving energy crisis.

• No fuel required.

• Unlimited energy resource.

• Zero Carbon-dioxide emission.

• Solar energy can be more efficiently collected in space.

• Elimination of plant and wildlife interference.

DISADVANTAGES• The main drawback of solar power energy transfer from

orbit is the storage of electricity during off peak demand

hours.

• Interference with communication satellites.

• The entire structure is massive.

• High cost and require much time for construction.

• Risks involved with malfunction.

CONCLUSION• More reliable than ground based solar power.

• In order for SPS to become a reality several

things have to happen:

1.Government Support.

2.Cheaper launch prices.

3.Involement of private sectors.

Thank You!