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
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Executive Summary – Rudy
Description, Options, and Justification – Kyle
Mechanical Considerations Subsystem – Terry
System Protection Subsystem – Clint
Universal Transformer Subsystem – Phil
Summary – Tanner
Executive Summary
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Issue: Major transformer failure Summer
2008 causing a major outage
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Project: Reduce outage time
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Typically SIUC reacts to failure instead of
preparation
Executive Summary
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Expectations
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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
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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
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Options Investigated
Do nothing
 Purchase 1 transformer
 Purchase 2 transformers
 Mobile transformer
 3 banked single-phase transformers
 Form consortium to share costs
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Option Chosen
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Purchase two transformers
◦ Covers both 480V and 208V transformers
◦ Covers most indoor transformers on feeder 7
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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
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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
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Costs
◦ Two $46,000 transformers
◦ Storage facility
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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
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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
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Limited by breaker handles
◦ Block pathway to open area of electrical
room
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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
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Ensure that replacement transformers
and the electrical system will be properly
protected against fault currents
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Chose feeder seven to do a protection
study
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Built a model in EasyPower
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System data
System Protection
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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
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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
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Mobile Transformer
Determined to be non-feasible
 Cable length to transformer location
presents problems
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◦ Voltage drop
◦ Safety hazards
◦ Security of power system
Summary
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Reduce outage periods
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Save money for SIUC
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Recommend database for all power
equipment at SIUC
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Estimated cost to implement: ~$92,000
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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