Team BUSS Backup Storage Source. Team BUSS Idaho Power Company Backup Storage Source Project Title Extra High Voltage (EHV) Station Second DC Storage.

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Presentation transcript:

Team BUSS Backup Storage Source

Team BUSS Idaho Power Company Backup Storage Source Project Title Extra High Voltage (EHV) Station Second DC Storage Source Sponsor

Team BUSS Team Members Rob Butzer Mitch Colburn Brian Vandenburg Backup Storage Source

Team BUSS Project Background EHV Substations: Midpoint 500kV substation AC power being run through a transformer DC power running the relays, indication lamps and breakers Backup Storage Source

Team BUSS Project Background DC System of a Substation: DC power supplied by rectified AC power under normal conditions DC power also charges the battery for the occurrence of an ac power outage Backup Storage Source

Team BUSS Backup Storage Source

Team BUSS Project Background DC Battery: Bank of up to 60 batteries Each battery rated at about 2.3V Backup Storage Source

Team BUSS Project Background When ac power is lost: Battery backup activated to keep relays online, up to 8 hours Battery used to trip breakers, re- energize the system This trip may occur up to 8 hours after the loss of ac power Backup Storage Source

Team BUSS Importance If loss of dc system:  Can result in a blackout if loss of protection elements  Can damage equipment at substations  Can lose information stored in relays Backup Storage Source

Team BUSS Project Deliverables 1. Reliability of DC battery system 2. Alternatives for backup dc storage supply 3. Implementation of recommended storage source on Model Power System Backup Storage Source

Team BUSS Problems: Presently, backup battery system is a single point of failure within the power system On the east coast, it is required to have duel battery backup system in any substation over 230kV Backup Storage Source

Team BUSS Failures: Idaho Power has always been able to re-energize its system A charger went off line, and voltage levels fell, and charger was replaced A cracked lid on a jar caused extensive smoke to issue from battery bank, but still able to trip the breakers Backup Storage Source

Team BUSS Reliability Fault Tree Analysis Each component of the dc system has a failure rate associated with it When reliability is calculated, take the reliability found and multiply by the number of components to find out how many failures will occur per year Backup Storage Source

Team BUSS Reliability Fault Tree Analysis Backup Storage Source 300 devices * = 6.36 failures/year

Team BUSS Midpoint Battery Specifications: Continuous load after power is lost draws 4.0 A. This must be held for 8 hours Momentary load of A to be supplied at the end of the 8 hour System voltage of 130V Backup Storage Source

Team BUSS Basis for Evaluation of Alternatives: 1. Reliability 2. Cost -Initial cost, maintenance costs, etc. Backup Storage Source

Team BUSS AlternativesUltracapacitors DC generator set Fuel Cells Duel Battery Backup Backup Storage Source

Team BUSS Backup Storage Source

Team BUSS Questions? Backup Storage Source