Wind Turbine Simulation(Phase IV)SDMAY 12-24

Advisor:Dr. Venkataramana Ajjarapu

Group Members Brian Alexander (Computer Engineering) Lon Bromolson (Electrical Engineering) Jarid Strike (Electrical Engineering) Chase Schaben (Electrical Engineering)

SDMAY 12-24

Project Description Computer controlled motor is coupled with

generator from wind turbine Turbine power is used to drive inverter w/ AC load Measurements are taken using DAQ USB-6008,

and imported into LabVIEW

SDMAY 12-24

Intended Use Laboratory Environment. Can be used for independent or for class

purposes. Can be operated by anyone with basic knowledge

of circuitry.

SDMAY 12-24

Major Changes Last year’s system:

Batteries are voltage source Wind turbine supplements power Weak motor

New system: Wind turbine provides voltage source Batteries can be used as backup PC provides user-friendly interface

SDMAY 12-24

Last Year’s System

SDMAY 12-24

Functional Requirements The turbine circuitry will generate a 24V DC

output for any simulated wind speed The turbine circuitry can supply 24V to any load

variation up to 400 W System is easy to use for average undergraduate

student Motor RPM can be set and maintained accurately

SDMAY 12-24

Non-Functional Requirements The final project will include a user’s manual The project will be documented through technical

manual and in-depth schematics Technology Requirements

LabVIEW interface must accurately calculate variables and display them for the user to see

All sensor and control equipment connected with LabVIEW

SDMAY 12-24

Turbine Circuitry Internal circuitry needs 7 VDC to operate Battery must supply voltage to system By removing this circuitry and using the 3-phase

generator directly, the turbine can provide voltage.

SDMAY 12-24

New System Model

SDMAY 12-24

SDMAY 12-24

Feedback Systems RPM Control

RPM is monitored Slip is calculated Voltage is adjusted to maintain low slip (1%)

Output Voltage Control Output voltage is monitored PWM duty cycle is adjusted to maintain output

voltage (24V)

SDMAY 12-24

SDMAY 12-24

Motor Issue Previous motor could not provide consistent high-

speed output without overloading/overheating We replaced the 370W induction motor with an

Ironhorse 1.5 HP induction motor This required a new bracket to mount the motor

SDMAY 12-24

Figure from Wikipedia “File:VFD System.png”

SDMAY 12-24

SDMAY 12-24

New System Model

SDMAY 12-24

Rectifier and Buck-Boost Variable voltage/frequency 3-phase output from

generator. Rectifier converts to 1-phase DC output. Buck-boost converter outputs compatible voltage

levels to the inverter.

SDMAY 12-24

MATLAB Model for Rectifier/Buck-Boost Circuit

SDMAY 12-24

Schematics

Pulse-Width Modulation Used to control switch in the buck-boost circuit. Circuitry controlled by LabVIEW via NI-DAQ. Varying switching frequency and duty cycle

depending on the load. Feedback duty cycle control

SDMAY 12-24

SDMAY 12-24

Organization – Plexiglas Boxes

SDMAY 12-24

Testing Diode Rectifier

Clean DC signal sent to Buck-boost. Buck-boost converter

Signal outputs desired voltage level. PWM

Able to control the width of modulation. Full System

All circuits interact correctly.

SDMAY 12-24

Testing Process

SDMAY 12-24

Final System

SDMAY 12-24

Total Cost and Time Spent$175 – 1.5 HP Motor$70 – Coupling/Mounting$50 – Hardware $55 – Circuitry$350 – Total$500 – Budget

SDMAY 12-24

Research DesignImplementation

SDMAY 12-24

Any Questions??