Transcript Team BUSS - University of Idaho

Team BUSS
Backup Storage Source
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Team BUSS
Backup Storage Source
EHV Substation Second DC Storage Source
Sponsor
Idaho Power Company
Team Members
Rob Butzer
Mitch Colburn
Brian Vandenburg
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Presentation Outline
Project Background
Customer Needs
Reliability Analysis
Alternatives Analysis
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Project Background
Presently, substation backup battery
systems are a single point of failure
within the power system
In the eastern U.S., utility companies
are required to have dual battery
backup system in any substation over
230kV
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DC System
Operates station control equipment
(communication, relays, breakers,
alarms)
Battery bank used during power
outages to maintain control of
substation
Project Background
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One Line Diagram
Project Background
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DC Battery Bank
Bank of up to 60
cells
Each cell rated at
about 2.1V
Nominal Voltage of
~130V
Project Background
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Battery Bank Sizing
Continuous load draws 5.5A for 8
hours to maintain station control
Momentary load of 142.8 A to be
supplied after 8 hours for breaker
control
Minimum Voltage ~105V
Project Background
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Customer Needs
1. Calculate reliability of present DC
battery system
2. Seek alternatives for a backup dc
storage supply and evaluate added
reliability
3. Implement scaled prototype on a
bench top system
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Present Fault Tree
50 faults * 0.0212 = 1.06 failures/year
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Projected Fault Tree
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Alternatives
Evaluation Basis:
1. Reliability
2. Cost
3. Maintenance
4. Life Expectancy
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Economical Analysis
Initial Cost $10,548
Battery Rack $1,460
Maintenance Cost ~$13,000/year
Alternatives
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Ultracapacitors
High Initial Cost
Low Maintenance
Environmentally
Friendly
Alternatives
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Fuel Cells
High Initial Cost
Low Maintenance
Environmentally
Friendly
Needs Energy
Partner
Alternatives
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DC Generator Set
Low Initial Cost
High Maintenance
Cost
Alternatives
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Flywheel
Low Initial Cost
Low Maintenance
Cost
Not a stand alone
source
Alternatives
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Dual Battery Backup
Low Initial Cost
High Maintenance
Cost
Field tested
Alternatives
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Nuclear Power Plant
Very High Initial
Cost
Lots of Maintenance
Terrible for
Environment
Alternatives
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Project Timeline
Time Schedule
Evaluate Alternatives
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b Order storage source for bench top testing
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Lead time for ordered parts
e
c
Calculate Reliability of Current System
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Evaluate Reliability of Alternatives
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v Implement Source into Model Pow er System
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Produce Recommendation Report
4/24 5/14 6/3 6/23 7/13 8/2 8/22 9/11 10/1 10/2111/10
Date
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Conclusion
Discussion
Project Background
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