HARNESSING HIGH ALTITUDE WIND POWER USING LIGHT GAS FILLED BLIMP

WELCOME1INDEX Introduction Architecture Classification Comparison Advantages Conclusion 2 INTRODUCTION Wind energy - most economical renewable energy technology. Wind turbines will supply 12% of the global electricity. Contributor in reducing CO2 emissions.Solutions to the mounting concerns over the security of energy supply and volatile fossil fuel prices.3 INTRODUCTION contd Wind doesnt blow all the time in most places. Wind at high altitudes is almost constant and have high velocity. Airborne wind turbines (AWT) generate more power compared to Conventional wind turbines(CWT).4 INTRODUCTION contd... A wind turbine with a rotor supported in the air without a tower. Harness KE of high altitude wind. 5

ARCHITECTURE Blimp (Air ship)

Turbine and Gear box

Tether

Electrical Converter Topology

66ARCHITECTURE7

Blimp (Air ship) A light gas filled geometry. Filled with Hydrogen or Helium gas. Size depends on the overall weight of the system.8

Tether To hold the Blimp at a given altitude. Transmit the power to ground base station.9

Tether contd.. Kevlar core :- * It is a synthetic fiber of high tensile strength. * Used especially as a reinforcing agent. Conductor :- * Uses aluminum conductor. * To reduce the weight.10Turbine & Gear boxGear box is used for low altitude turbines. Directly coupled for high altitude turbines. Turbine is connected to the alternator using gear box. 11

Electrical converter topologyHere the Mechanical power is converted into Electrical power.

Permanent magnet synchronous generator (PMSG) is used.

Power electronic converters.12ClassificationAC Generation - DC Transmission : Low voltage AC generation and Medium voltage DC transmission. 2. AC Generation - AC Transmission: Medium voltage AC generation and Medium voltage AC transmission.13Electric system of HAWP system with LV-AC generation and MV-DC transmission

14Electric system of HAWP system with three phase MV-AC generation and MV-AC transmission

15Variation of Power with Altitude16

Various parameters comparisonParametersCWTHAWTWind power density (W/m2)3362600Land requirement (m2/100kW)20,000520Initial investment (US$/kW)20001100COE (US$/MWh)7141Capacity factor30%70%17Comparison between HAWP & CWPHAWTCWT Constant wind High speedHighly efficient Low cost

Not constant Low speed Less efficient Cost is too high

18CHALLENGES Hydrogen gas is highly inflammable. Lightning. Unexpected displacement from current position. Therefore automatic position controllers are used to keep the system at a specified position19ADVANTAGESHighly ReliableSimpleLow CostNegligible MaintenanceConstant OutputRobust Construction

20CONCLUSION Alternate energy resource. High and constant power. Easy deploying, low installation cost and maintenance systems. Eco-friendly. Challenges like unforeseen crashing. Need automated control systems.21REFERENCESHarnessing High Altitude Wind Power Using Light Gas Filled Blimp: Jeevan Adhikari, Department of Electrical and Computer Engineering, National University of Singapore, Singapore(2013)G. M. Masters, Renewable and Efficient Electric Power Systems(Wiley,2004). Loyd. M. L, Cross Wind Power Journal of Energy vol. 4 May-June 1980,p. 106-111. White, N.; Tierno, N.; Garcia-Sanz, M., A novel approach to airbornewind energy: Design and modeling, Energytech, 2011 IEEE , vol., no., pp.1,6, 25-26 May 2011

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