Pscad simulation of grid tied photovoltaic and wind farms
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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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PSCAD Simulation of Grid Tied Photovoltaic and Wind Farms

By

AbdulrahmanKalbat


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


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


Power Network Under Study

  • Complete Utility Grid (from generation to distribution)

  • Utility Scale PV System

  • Utility Scale Wind Turbine System


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,


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


  • 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


    Grid Connected PV


    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


    Maximum Power Point Tracker

    Variable Solar Radiation

    Increase Solar Radiation  Increase Short Circuit Current


    Maximum Power Point Tracker

    Variable Temperature

    Increase Temperature  Decrease Open Circuit Voltage


    Maximum Power Point Tracker

    Maximum Power Yield


    Maximum Power Point Tracker

    Regulate and step-down the high voltage of the PV array.


    3-Phase Inverter


    3-Phase Inverter

    Output Current

    Output Voltage


    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 [°]


    Thank You


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