F08

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F08 72 OUTGRESPFirst 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

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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

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Executive Summary

• Issue Major transformer failure Summer 2008
  causing a major outage
• Project Reduce outage time
• Typically SIUC reacts to failure instead of
  preparation

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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

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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

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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

• 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

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Subsystems Flowcharts

• Implementing recommendations
• Will reduce outage time at least eight hours
• Saves money after five uses of each transformers

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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

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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

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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

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Limiting Factors
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Problems at Arena
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Ideal Tunnel
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Actual Tunnel
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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

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System Protection

• Replaced the present transformers with our
  specified replacement transformers
• 1000 kVA 12,470 V ? 4160 V ? / 480 V Y
  Z 4.5
• 1000 kVA 12,470 V ? 4160 V ? / 208 V Y
  Z 4.5
• Ran the simulation

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Time-Current Characteristic Curve
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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 non-critical

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Mobile Transformer

• Determined to be non-feasible
• Cable length to transformer location presents
  problems
• Voltage drop
• Safety hazards
• Security of power system

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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

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Summary - Acknowledgements

• Steve Lazorchak
• Damon Adams
• Rob Estes
• Justin Harrell
• Rick Martin

• Joe Wolfe
• Keith Field
• Mrs. Purcell
• Dr. Hatziadoniu