Wind Energy System
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Wind Energy System. By: Andy Brown, Basheer Qattum & Ali Gokal Advisors: Dr. Na & Dr. Huggins. Outline. Introduction Hardware Software Results Future Steps. History of Wind Energy Utilization. ADVANTAGES OF WIND POWER.

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Wind energy system

Wind Energy System

By: Andy Brown, Basheer Qattum & Ali Gokal

Advisors: Dr. Na & Dr. Huggins


Wind energy system

Outline

  • Introduction

  • Hardware

  • Software

  • Results

  • Future Steps


Wind energy system

History of Wind Energy Utilization


Wind energy system

ADVANTAGES OF WIND POWER

  •  Wind is free and with modern technology it can be captured efficiently

  • Wind does not cause green house gases or other pollutants

  • Although wind turbines can be very tall each takes up only a small plot of land

  • Excellent source for remote areas not connected to a grid

  • Wind turbines have a role to play in both the developed and third world

  • Available in a range of sizes meaning a vast range of people and businesses can use them

  • Environmentally Friendly

  • Economically Competitive


Wind energy system

Goals

  • Output maximum power despite fluctuating wind conditions.

  • Utilize power electronics to perform conversions

  • Successfully implement a DSP board to have a greater degree of control over our system to harness optimal energy

  • To create a system that is applicable with real world industry


Wind energy system

Functional Requirements (Hardware)

  • Shall be able to produce .75 kilowatt but not more then 5 kilowatts

  • Shall be able to convert wind power to single phase AC power

  • Must be able to maximize wind power conversion


Wind energy system

Wind-Electric Systems

  • Induction Generators, Directly Connected to the Grid

  • Doubly-Fed, Wound Rotor Induction Generators

  • Power Electronics Connected Generator


Wind energy system

Top Level Diagram


Wind energy system

Functional Description

Sub Systems

  • Generator

  • Diode Rectifier

  • Boost Converters

  • Inverter


Wind energy system

Brushless DC Motor

Due to complications with size and Lab requirements, PMSG still.

Max Current5.4 A

Max Speed3600RPM

Max Voltage 160 V

Max Power 750W


Wind energy system

Brushless DC Motor

ɳ=(120*f)/(poles)


Wind energy system

Brushless DC Motor


Wind energy system

Three-Phase Diode Rectifier

Output of DC generator after 3phase diode rectifier w/1.5mF Cap

Max Peak Voltage1600V

Max Peak Current 300A

Max Current25A

Max Voltage600V

V = I*R Vo=(1.35Vin – VDiode)

P = I*V ɳ=(120*f)/(poles)

Value of capacitor to ensure clear signal

C=(Vp/2*f*Vr) =534μF

Therefore we used 1.5mF


Wind energy system

Three-Phase Diode Rectifier

Vin = 64.0 V

Vo = 84.0 V

Io = 961 mA

Speed = 3000 RPM

R = 88Ω

P = 80.72W


Wind energy system

Three-Phase Diode Rectifier

Output of DC generator after 3phase diode rectifier w/o Cap

Current

DC Voltage

Vo = 85.0 V

Io = 964 mA

Speed = 3000 RPM


Wind energy system

Three-Phase Diode Rectifier

Output of DC generator after 3phase diode rectifier w/1.5mF Cap

DC Voltage

3φ Voltage

Vin = 64.0 V

Vo = 84.0 V

Io = 961 mA

Speed = 3000 RPM


Wind energy system

Interleaved Boost Converter


Wind energy system

Boost Converter

Vo=Vin/(1-D), or for more accurate values,

Vo= {[(VIn-VIGBT*D)/(1-D)] – VDiode}

IGBT: Switching Freq up to 300kHz

Max voltage at 600V

Max current at 60A


Wind energy system

Boost Converter


Wind energy system

Gate Driver

Most time consuming part of Boost converter


Wind energy system

Gate Driver

  • Gate to emitter (pulse) ±30V

  • Gate to emitter (cont) ±20V

  • Max Gate Current ±250uA

  • Gate driver output+18V

  • 120/14 VAC-RMS 17.89VDC

  • Output up too 600V

  • Current up to 2A

  • Shutdown mode for protection


Wind energy system

Gate Driver


Wind energy system

Software


Wind energy system

Functional Description


Wind energy system

DSP Board - TI TMS320F2812

  • PWM Generation

    • 16-Bit

    • 16 PWM outputs

    • 0 V – 3.3 V

  • ADC

    • 12-Bit

    • Analog Input: 0 V - 3 V


Wind energy system

Controller Implementation Process

SIMULINK

DSP

CODE COMPOSER


Wind energy system

Testing CircuitSingle Channel Boost Converter


Wind energy system

SimulationOpen-Loop Controller


Wind energy system

Testing CircuitOpen Loop Controller


Wind energy system

Testing HardwareOutput Results


Wind energy system

Testing HardwareOutput

  • Duty Cycle: 20%

  • Input Voltage: 5.00 V

  • Output Voltage: 6.00 V


Wind energy system

Voltage Controller Simulation


Wind energy system

Voltage Controller


Wind energy system

Voltage ControllerOutput


Wind energy system

Voltage-Current ControllerSimulation


Wind energy system

Voltage-Current Controller


Wind energy system

Boost Converter Controller VS. Interleaved Boost Controller


Wind energy system

Interleaved Boost ConverterOpen-Loop Controller


Wind energy system

Interleaved Boost ConverterOpen-Loop Controller


Wind energy system

Interleaved Boost ConverterOpen-Loop ControllerOutput


Wind energy system

Single Phase Inverter Controller

  • Sinusoidal Pulse Width Modulation


Wind energy system

Unipolar PWM

Vout = VdWhen T1,T4 is ON

Vout=-VdWhen T2,T3 is ON

Vout=0When T1,T3 or T2,T4 is ON


Wind energy system

Unipolar PWM


Wind energy system

LC Filter

Magnitude Bode Plot for Second-Order LC Filter


Wind energy system

LC Filter

  • Chose L = .125mH

  • Yields C = 240uF


Wind energy system

Inverter Controller Simulation


Wind energy system

Inverter Controller Simulation


Wind energy system

Interver Unipolar PWM Controller


Wind energy system

Inverter SPWM - Output


Wind energy system

Future Work - Controller

  • Closed-Loop Voltage and Current Controller for Two-Channel Interleaved Boost Converter

  • Maximum Power Point Tracking Controller

  • Single-Phase Inverter Controller with Unity Power Factor Correction


Wind energy system

Interleaved Boost Converter Voltage-Current Controller

  • Same Controller as designed

  • Need to output two PWM signal

    • The second PWM signal has to been delayed by half the period


Wind energy system

Interleaved Boost ConverterSimulation


Wind energy system

Maximum Power Point Tracking (MPPT)


Wind energy system

MPPT

  • Perturbation and Observation Method (P&O)

    • MPPT algorithm adjusts duty cycle to achieve


Wind energy system

MPPT – System Diagram


Wind energy system

MPPT - Flowchart


Wind energy system

MPPTCurrent Controller Design


Wind energy system

Single-Phase Inverter Controller with Unity Power Factor CorrectionSystem Diagram


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