F08 – 72 – OUTGRESP First Contingency Outage Response for SIUC
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Transcript F08 – 72 – OUTGRESP First Contingency Outage Response for SIUC
F08 – 72 – OUTGRESP
First Contingency Outage
Response for SIUC
Client: SIUC Physical Plant Engineering Services
Team Members:
Rudy Probst, EE
Kyle Moore, EE
Terry Campanella, PM, EE/CpE
Clint Frederick, EE
Phil Craig, EE
Tanner Jones, EE
Faculty Advisor: Dr. Constantine Hatziadoniu
Client Contact: Steve Lazorchak, PE
Outline of Topics
Executive Summary – Rudy
Description, Options, and Justification – Kyle
Mechanical Considerations Subsystem – Terry
System Protection Subsystem – Clint
Universal Transformer Subsystem – Phil
Summary – Tanner
Executive Summary
Issue: Major transformer failure Summer
2008 causing a major outage
Project: Reduce outage time
Typically SIUC reacts to failure instead of
preparation
Executive Summary
Expectations
◦
◦
◦
◦
Feeder diagram for fault protection
Emergency transformer
Mechanical restrictions
Outage plan
Outcome
◦ Simulation of feeder diagram
◦ Transformer recommendation
◦ Recommendations to reduce outage time
Executive Summary
Results
◦ Feeder diagram not as accurate as desired
◦ On time
◦ On budget
Estimated cost to implement: ~$92,000
Time to implement: Estimated 8 months
Cost of study: $0
Options Investigated
Do nothing
Purchase 1 transformer
Purchase 2 transformers
Mobile transformer
3 banked single-phase transformers
Form consortium to share costs
Option Chosen
Purchase two transformers
◦ Covers both 480V and 208V transformers
◦ Covers most indoor transformers on feeder 7
Investigate consortium option
◦ Many other institutions have similar issues
◦ Coverage against failure of two transformers
with same secondary voltage
Subsystems Flowcharts
First Contingency
Outage Response for
SIUC
Mechanical
Considerations
System Protection
Universal
Transformer
Replacement
Implementing recommendations:
◦ Will reduce outage time at least eight hours
◦ Saves money after five uses of each transformers
Cost and Time to Implement
Costs
◦ Two $46,000 transformers
◦ Storage facility
Time
◦ Analyze, confirm, and design replacement :
20 man-hours
◦ Finalize contracts to build: eight man-hours
◦ Prepare storage area: unknown
◦ Develop plan to replace transformers: 58
man-hours
Mechanical Considerations
Engineering C – 2 transformers
◦ No clear pathway to the surface
◦ Tunnels covered with desks, coal samples,
chairs, file cabinets, etc.
◦ Will have to avoid steam piping and ledges
Replacement Location
Limited by breaker handles
◦ Block pathway to open area of electrical
room
Wide open space at backside of electrical
room
◦ Need cabling to avoid access locations
◦ Nails in ceiling limit ability to run cabling
Limiting Factors
Problems at Arena
Ideal Tunnel…
Actual Tunnel…
System Protection
Ensure that replacement transformers
and the electrical system will be properly
protected against fault currents
Chose feeder seven to do a protection
study
Built a model in EasyPower
System data
System Protection
Replaced the present transformers with our
specified replacement transformers
◦ 1000 kVA 12,470 V Δ – 4160 V Δ / 480 V Y
%Z = 4.5
◦ 1000 kVA 12,470 V Δ – 4160 V Δ / 208 V Y
%Z = 4.5
Ran the simulation
Time-Current Characteristic Curve
Universal Transformer
Must be electrically and mechanically
compatible
Several options considered
Fourteen of fifteen transformers 208 V or
480 V secondary voltage
Thirteen of fifteen transformers rated
1000 kVA or less
Most outdoor transformers are noncritical
Mobile Transformer
Determined to be non-feasible
Cable length to transformer location
presents problems
◦ Voltage drop
◦ Safety hazards
◦ Security of power system
Summary
Reduce outage periods
Save money for SIUC
Recommend database for all power
equipment at SIUC
Estimated cost to implement: ~$92,000
Time to implement: estimated 8 months
Summary - Acknowledgements
Steve
Lazorchak
Damon Adams
Rob Estes
Justin Harrell
Rick Martin
Joe Wolfe
Keith
Field
Mrs. Purcell
Dr. Hatziadoniu