1. Shore Station UPS Requirements for the NEPTUNE 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 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 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
Item AC DC
Simplicity X
Reliability
Majority of Load Voltage - 120AC
Load Power Requirement – 200 kW
Foot Print Size
Cost
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