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Team BUSS. Backup Storage Source. Team BUSS. Backup Storage Source. EHV Substation Second DC Storage Source Sponsor Idaho Power Company Team Members Rob Butzer Mitch Colburn Brian Vandenburg. Presentation Outline. Project Background Customer Needs Reliability Analysis

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Team buss

Team BUSS

Backup Storage Source


Team buss1

Team BUSS

Backup Storage Source

EHV Substation Second DC Storage Source

Sponsor

Idaho Power Company

Team Members

Rob Butzer

Mitch Colburn

Brian Vandenburg


Presentation outline

Presentation Outline

  • Project Background

  • Customer Needs

  • Reliability Analysis

  • Alternatives Analysis


Background

Background

  • In EHV substations, battery banks are used to maintain operational control of the substation when ac power is lost

  • The banks are able to control the relays and breakers, both used to help re-energize the system


Present dc battery bank

Present DC Battery Bank

  • Bank of up to 60 cells

  • Each cell rated at about 2.1V

  • Nominal Voltage of ~130V


Present battery sizing

Present Battery 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


Present system

Present System

One Line Diagram


Customer needs

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


Present fault tree

Present Fault Tree

0.000068*525,600 min/year = 35.7 min/year


Parallel batteries

Parallel Batteries


Parallel battery systems

Parallel Battery Systems

4.624*10^-6*31,536,000 sec/year=

0.146 sec/year


Alternatives

Alternatives

Evaluation Basis:

1. Reliability

2. Cost

3. Maintenance

4. Life Expectancy

5. Size


Choice matrix for alternatives

Choice Matrix for Alternatives


Viability of alternatives

Viability of Alternatives


Hybrid system battery ucaps

Hybrid System:Battery & UCaps

  • Initial Cost: ~$1000 plus battery resized?

  • Battery used for continuous

  • Ucaps used for momentary


Hybrid system dc generator ucaps

Hybrid System:DC Generator & UCaps

  • Initial Cost: ~$1500

  • Generator used for continuous

  • Ucaps used for momentary


Bench top system

Bench Top System

  • The goal of the bench top system is to show the effectiveness of a hybrid system and how it may be implemented in a EHV substation


Bench top testing

Bench-Top Testing

This is the one line diagram for the bench-top system that is currently being designed


Project timeline

Project Timeline


Conclusion

Conclusion

Discussion


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