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KITES WIND POWER GENERATION

ByK.SURESH

084A1A0227IV EEE

SHREE INSTITUTE OF TECHNICAL EDUCATION

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NEED

• At present, about 80% of the world electric energy is produced from thermal plants making use of fossil sources (oil, gas, coal).

• The economical, geopolitical and environmental problems related to such sources are becoming everyday more and more evident.

• Is it possible to invert the percentage split between non-renewable and renewable sources with the present renewable technologies ?

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Limits of present renewable technologies

•High production costs incentives are required for their installations Large occupation of land •Without significant breakthroughs, even reaching the objectives posed by many countries (e.g. 20% for 2020 in EU) is a difficult challenge

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Kites wind power generation

• A radical innovation in wind technology, Aimed to generate renewable energy at cost lower than from oil

• Exploiting a renewable energy source , the altitude wind, available anywhere

Channelled through arrays of automatically controlled tethered airfoils (kites).

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Altitude vs. ground wind

• Wind power is already extremely promising at approx. 800 meters, where the average wind speed is estimated at 7.2 m/s.

• The related wind power is almost 4 times the one globally available for wind towers.

Altitude Wind speed wind power 800 m 7.2 m/s 205 W/m2 80 m 4.6 m/s 58 W/m2

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The problem

• Wind at 800 m is out of the reach of current and future aero generating towers, already struggling at 100 m.

• The structure holding up the rotors becomes exponentially heavier, more unstable and expensive

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Kites power solution• A radical shift of perspective: no longer heavy

and static structures, but a light, dynamic and intelligent machine.

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Kites key technology

• The core is the system of automatic control of the kite flight, called KSU (Kite Steering Unit):

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FAST MODEL PREDICTIVE CONTROL STRATEGY

• Nonlinear model predictive control techniques, together with an efficient implementation based on set membership function approximation theory, are employed to maximize the energy obtained by Kites wind power generation, while satisfying input and state constraints.

• Kites control technique is investigated through numerical simulations.

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THANK……………U