Transcript Flywheel - Electrical and Computer Engineering

HydroFly
Flywheel
Gavin Abo
Nate Stout
Nathan Thomas
Hydrofly
• Two Teams
– Flywheel
– Fuel Cell
• Adam Lint
• Chris Cockrell
• Daniel Hubbard
Sponsors & Mentors
• Brian Johnson
• Herb Hess
• Satish Samineni
Design Review II:
Final Design Review Outline
I. Introduction
II. Objectives
III. Design Functionality
IV. Schedule
V. Budget
VI. Questions
I. Introduction
Why is the project being done?
-To correct short voltage sags (a few seconds) to maintain a stable
voltage to critical loads.
Why is this important?
-The shutdown of critical loads due to short voltage sags can be
costly.
II. Primary Objective
• Interface a flywheel to the AMPS with the
ability to correct for voltage sags occurring
on the AMPS.
– Implement the design by Satish Samineni
Secondary Objectives
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•
Spin a flywheel
Communicate between converters
Operate each converter with its own PWM
Provide power to AMPS
Operation Manual
III. Design Functionality
•
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Organizational Chart
Block Diagram
Overall Circuit Schematic
Sub Circuit Schematics
Programming
Assembled
Documentation
Specifications
Organizational Chart
Interface a flywheel to AMPS to
correct for voltage sags on the
system
Program the
switching
times
calculation
Spin a flywheel
Provide power
to AMPS
Operate a
space vector
PWM scheme
Operate a
sine–triangle
PWM scheme
Program
matrix math
functions
Program a
Phase locked
loop
Communicate
between
converters
Program the
triangle wave
Sag Status
Program the
sine wave
look up table
Block Diagram
Circuit Schematic
Series Transformer Diagram
Source
B Phase
+ Vinjected -
+ Vinjected -
Flywheel Energy Storage System
C Phase
Load
A Phase
+ Vinjected -
DC link startup power supply
1
120Vac
D1
2
D3
+
Generates positive
DC voltage
D2
D4
1
1
D2
-
Vdc
2
2
D4
-
Generates negative
DC voltage
Vdc
D1
120Vac
D3
1
2
+
The Programming
• What we have
programmed
– Matrix math
capabilities
– Space Vector PWM
scheme
– Sag detector and
corrector
• What we still have to
program
– Phase Locked Loop
– Modify already
programmed code to
work with the
measured inputs
Assembled
• What has been
assembled
– Capacitor shorting bars
– Utility Cart
• What needs assembled
– DC link charging
supply
– LEMS
– Safety Cover
– Transformer
Documentation
• Test plan
– Functional test plan
– Specification test plan
• Operators Manual
• Poster
Specifications
The AMPS
Series Transformers
DC Bus Voltage
DC Bus Capacitance
Flywheel Inertia
Induction Machine Ratings
SVPWM Switching Frequency
SPWM Switching Frequency
Maximum Sag Correction Duration
Maximum Magnitude of Sag Correction
Sag Correction Response Time
Magnitude Sag Correction Tolerance
2 Tier Converters
DSP Program Language
Sample Rate for Voltage Correction
Flywheel Speed Sensor
DC power supply max. ripple
3 Phase, 208 V, 60 Hz, 5 kVA
110V/220V
450 V max
2 x 250V 1000 μF (grounded between the 2)
0.911 kg-m2
208 V, 32.6 A, 60 Hz, 10 hp, 4 pole
1 kHz
10.8 kHz
1.5 s
37% (or 63% of rated) @ 0.95 per unit
Within 2 cycle
Within 0.95pu  0.05pu of rated
6 IGBTs 75A, JTAG (software not
included), etc.
C with inline ASM from TI
20k samples per cycle
Position Encoder
50V DC
IV. Schedule
V. Budget
Quantity
2
1
1
2
1
1
10
Company
Item
DC/AC Converter
DSP Software
XDS510PP-Plus Parallel Port
Emulator
1000 F Capacitors 250 V
Craftsman Utility Cart (Mfr.
model #59345)
3-Phase Transformer
120V 20A Diodes
Tier Electronics
Texas Instruments
Spectrum Digital
Unit Price
SubTotal with
Freight
$1,700
$3,428.04
$495
Donated
$974.25
Donated
Futurlec
Sears (Lewiston, ID)
$2.5
$62.99
$8
$62.99
UI G10 Lab
Digi-Key
$240
$1.138
Salvaged
$18.59
$3517.62
$30
Subtotal to Date
1
Design Poster/Report Binding
6
6
Voltage Transducer
Current Sensor
Other
48 V DC 20 W Power Supply
1
UI Commons Copy
Center
Digi-Key Corporation
Digi-Key Corporation
Jameco
Total Expenditures
Proposed Budget
Remaining Budget
$30
$37
$21
$222
$126
$929.38
$10.95
$4,825
$4,825
$0
VI. Questions
http://www.ece.uidaho.edu/hydrofly/website