f08 – 72 – outgresp first contingency outage response for siuc client: siuc physical plant...
TRANSCRIPT
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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
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Outline of TopicsOutline of TopicsExecutive Summary – RudyDescription, Options, and Justification –
KyleMechanical Considerations Subsystem –
TerrySystem Protection Subsystem – ClintUniversal Transformer Subsystem – PhilSummary – Tanner
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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
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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
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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
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Options InvestigatedOptions InvestigatedDo nothingPurchase 1 transformerPurchase 2 transformersMobile transformer3 banked single-phase
transformersForm consortium to share costs
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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
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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
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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
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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
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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
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Limiting FactorsLimiting Factors
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Problems at ArenaProblems at Arena
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Ideal Tunnel…Ideal Tunnel…
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Actual Tunnel…Actual Tunnel…
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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
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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
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Time-Current Characteristic Time-Current Characteristic CurveCurve
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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
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Mobile TransformerMobile Transformer
Determined to be non-feasibleCable length to transformer
location presents problems◦Voltage drop◦Safety hazards◦Security of power system
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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
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Summary - Summary - AcknowledgementsAcknowledgements
Steve Lazorchak
Damon Adams
Rob EstesJustin HarrellRick Martin
Joe WolfeKeith FieldMrs. PurcellDr. Hatziadoniu