f08 – 72 – outgresp first contingency outage response for siuc
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F08 – 72 – OUTGRESPF08 – 72 – OUTGRESPFirst Contingency Outage First Contingency Outage
Response for SIUCResponse for SIUCClient: SIUC Physical Plant Engineering ServicesTeam Members: Rudy Probst, EE
Kyle Moore, EETerry Campanella, PM,
EE/CpEClint Frederick, EEPhil Craig, EETanner Jones, EE
Faculty Advisor: Dr. Constantine HatziadoniuClient Contact: Steve Lazorchak, PE
Outline of TopicsOutline of TopicsExecutive Summary – RudyDescription, Options, and Justification –
KyleMechanical Considerations Subsystem –
TerrySystem Protection Subsystem – ClintUniversal Transformer Subsystem – PhilSummary – Tanner
Executive SummaryExecutive Summary
Issue: Major transformer failure Summer 2008 causing a major outage
Project: Reduce outage time
Typically SIUC reacts to failure instead of preparation
Executive SummaryExecutive SummaryExpectations
◦Feeder diagram for fault protection◦Emergency transformer◦Mechanical restrictions◦Outage plan
Outcome◦Simulation of feeder diagram◦Transformer recommendation◦Recommendations to reduce outage
time
Executive SummaryExecutive SummaryResults
◦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 InvestigatedOptions InvestigatedDo nothingPurchase 1 transformerPurchase 2 transformersMobile transformer3 banked single-phase
transformersForm consortium to share costs
Option ChosenOption ChosenPurchase 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 FlowchartsSubsystems Flowcharts
First Contingency Outage Response for
SIUC
Mechanical Considerations
System ProtectionUniversal
Transformer Replacement
Implementing recommendations:◦ Will reduce outage time at least eight hours◦Saves money after five uses of each
transformers
Cost and Time to Cost and Time to ImplementImplementCosts
◦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 ConsiderationsMechanical ConsiderationsEngineering 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 LocationReplacement LocationLimited 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 FactorsLimiting Factors
Problems at ArenaProblems at Arena
Ideal Tunnel…Ideal Tunnel…
Actual Tunnel…Actual Tunnel…
System ProtectionSystem ProtectionEnsure 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 EasyPowerSystem data
System ProtectionSystem ProtectionReplaced 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 Time-Current Characteristic CurveCurve
Universal TransformerUniversal TransformerMust be electrically and
mechanically compatibleSeveral options consideredFourteen of fifteen transformers
208 V or 480 V secondary voltageThirteen of fifteen transformers
rated 1000 kVA or lessMost outdoor transformers are
non-critical
Mobile TransformerMobile Transformer
Determined to be non-feasibleCable length to transformer
location presents problems◦Voltage drop◦Safety hazards◦Security of power system
SummarySummaryReduce 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 - Summary - AcknowledgementsAcknowledgements
Steve Lazorchak
Damon Adams
Rob EstesJustin HarrellRick Martin
Joe WolfeKeith FieldMrs. PurcellDr. Hatziadoniu
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