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PSCAD Simulation of Grid Tied Photovoltaic and Wind Farms

PSCAD Simulation of Grid Tied Photovoltaic and Wind Farms. By Abdulrahman Kalbat. PSCAD/EMTDC. PSCAD : Power Systems Computer Aided Design PSCAD is Graphical User Interface for EMTDC simulation engine EMTDC : Electromagnetic Transients including DC

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PSCAD Simulation of Grid Tied Photovoltaic and Wind Farms

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  1. PSCAD Simulation of Grid Tied Photovoltaic and Wind Farms By AbdulrahmanKalbat

  2. PSCAD/EMTDC • PSCAD: Power Systems Computer Aided Design • PSCAD is Graphical User Interface for EMTDC simulation engine • EMTDC: Electromagnetic Transients including DC • Simulate time domain instantaneous response of the power systems www.pscad.com

  3. PSCAD Vs. Simulink • PSCAD’s interface is specialized for power system networks • Faster time domain simulation speed • Matlab/Simulink Interface in PSCAD • Availability of the models for Solar Panels and Wind Turbines Venayagamoorthy, Ganesh K., “Comparison of power system simulation studies on different platforms – RSCAD, PSCAD/EMTDC, and SIMULINK SimPowerSystems,” International Conference on Power System Operations and Planning, 2005

  4. Power Network Under Study • Complete Utility Grid (from generation to distribution) • Utility Scale PV System • Utility Scale Wind Turbine System

  5. Previous Research Done • Electrical model development and validation for distributed resources for NREL [1] • Modeling of a photovoltaic system with a distributed energy storage system [2] • Power quality effects of high PV penetration on Distribution Networks [3] [1] M.G. Simões, B. Palle, S. Chakraborty, and C. Uriarte, “Electrical Model Development and Validation for Distributed Resources ,” NREL, Golden, CO, 2007 [2} Anthony W. Ma, “MODELING AND ANALYSIS OF A PHOTOVOLTAIC SYSTEM WITH A DISTRIBUTED ENERGY STORAGE SYSTEM,” M.S. Thesis, Dept. Elect. Eng., California Polytechnic State Univ., San Luis Obispo, CA, 2012 [3] Minas Patsalides, et. al., “Towards the establishment of maximum PV generation limits due to power quality constraints,” Electrical Power and Energy Systems,

  6. Expected Results • Effects of PV and Wind systems on the power quality of the utility grid • Frequency • Voltage • System’s response to faults: • Line to line faults • Line to ground faults • Lightning strikes

  7. Solar Photovoltaic Model • Photovoltaic Model • Directly convert solar energy into electricity • Maximum Power Point Tracker Model • Ensure optimum output at varying temperature and insolation • Regulate and step-down the high voltage of the PV array. Models developed by: AthulaRajapakse, Dept. of Electrical and Computer Engineering, Univ. of Manitoba, Winnipeg, Canada

  8. Grid Connected PV

  9. Grid Connected PV Solar Radiation + Cell Temperature Data PV Array + Output Capacitor DC-DC Converter for MPP Tracking DC-bus Capacitor and Start-up Charging 3-phase Inverter Bridge Anthony W. Ma, “MODELING AND ANALYSIS OF A PHOTOVOLTAIC SYSTEM WITH A DISTRIBUTED ENERGY STORAGE SYSTEM ,” M.S. Thesis, Dept. Elect. Eng., California Polytechnic State Univ., San Luis Obispo, CA, 2012

  10. Maximum Power Point Tracker Variable Solar Radiation Increase Solar Radiation  Increase Short Circuit Current

  11. Maximum Power Point Tracker Variable Temperature Increase Temperature  Decrease Open Circuit Voltage

  12. Maximum Power Point Tracker Maximum Power Yield

  13. Maximum Power Point Tracker Regulate and step-down the high voltage of the PV array.

  14. 3-Phase Inverter

  15. 3-Phase Inverter Output Current Output Voltage

  16. Wind Turbine Model • Inputs • Vw:  Wind speed (must be a positive value) [m/s] • W:  Machine mechanical speed [rad/s] • Beta:  Pitch angle [°] • Outputs • Tm:  Output torque of the turbine [p.u.] • P:  Output power of the turbine [p.u.] • Inputs • Wm:  Mechanical speed of the machine [rad/s] • Pg:  Power output of the machine based on the machine rating [p.u.] • Output • Beta:  Pitch angle [°]

  17. Thank You

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