1. Shore Station UPS Requirements for theNEPTUNE Power System Tim McGinnis UW/APL

2. Background • 2 Shore Stations – each able to individually power to the network, although with possible reduced capability • West Coast of Vancouver Island • Planned visitor center at Victoria • Existing cable stations at Port Alberni, Bamfield • Oregon Coast • Existing cable stations at Nedonna Beach, Rockaway, Pacific City, Bandon

3. Local Utility Power Reliability • 2 Substations, each located about 8 miles away • Station currently served by 1, possibility of connecting to both substations with a switch • Several outages of 30-60 minutes per year can be expected – mostly from trees/branches

5. UPS Alternatives • DC System • Typical for Telecom Systems • Most equipment requires 48 VDC • AC-DC rectifiers supply power to batteries and equipment • If utility power fails, batteries are always on-line • 3-8 hour battery life typical, generator optional • DC-AC inverter for critical AC loads (minimal)

6. Traditional Telecom Power Feed Equipment (PFE)

7. UPS Alternatives • AC System • Typical for Information Technology, Network, Hospital, Commercial and similar facilities • Most equipment requires 120VAC • If utility fails, run on battery until generator starts • 10 minute battery life, typical • One or more generators for AC backup

8. Typical IT UPS System with a backup generator

9. Selection Criteria • Reliability • Load Voltage and Power Requirements • Cost

10. Reliability - DC

11. Reliability - AC

12. Load Power Requirements • Expected NEPTUNE Shore Station Load is mostly AC equipment • Power Estimate – 120 kW total • 100 kW seafloor cable load • 20 kW terrestrial load • Current Estimates • 48 VDC → 2500 A • 480 VAC, 3Ф → 144 A

13. Cost • For Loads < 25 kW • Batteries cost less • Batteries have smaller footprint • For Loads > 25 kW • Generator costs less • Generator has smaller footprint

14. Criteria for selecting a UPS System

15. Conclusions • Need to learn more about Shore Station power requirements • Need to confirm reliability/availability data • Need to learn more about similar installations