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Control of a Distributed Generation System Comprising Wind Turbine, Photovoltaic Array, and Fuel Cell in Standalone
Operation

Shirazi, Moein | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41543 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Zolghadri, Mohammad Reza; Karimi, Houshang
  7. Abstract:
  8. On account of the exhausting nature and increasing daily cost of the fossil fuels, it seems that replacing the fossil fuels by an alternative source of energy is inevitable. Moreover, in the remote areas that the electricity network is not accessible, the use of distributed sources (DSs) such as solar energy and wind energy is advantageous. Continuity of the supply and voltage control of the load in spite of the stochastic nature of the generated power of the renewable energy resources are the main concerns in the distributed generation (DG) systems. In this thesis, stand-alone operation of a DG unit comprising a solar unit and wind turbine as primary sources of energy is considered. A hydrogen unit is employed as a long-term storage and a battery unit is used as a short-term energy system. In the hydrogen unit, the fuel cell consumes hydrogen to provide the shortage of the power, whereas the excess of the generated power of the primary sources is used by the electrolyzer to produce hydrogen. Each of the mentioned energy sources is connected to a DC link of a voltage source converter (VSC) via a DC-DC converter. In the proposed control system, by controlling the DC-DC converters,the power flow between the energy sources and the load is managed and the DC link voltage is kept constant as well. The VSC controller regulates the load voltage despite the load parameters uncertainties. The performance of the proposed control system is verified by using MATLAB/Simulink software for the various operational scenarios
  9. Keywords:
  10. Wind Turbine ; Fuel Cell ; Electrolyzer ; Hybrid System ; Stand-Alone State ; Photovoltaic Array ; Hydrogen Unit ; Power Flow Management

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