Transcript A New Isolated Grid Paradigm

©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
A New Isolated Grid Paradigm;
All Renewables-----No Diesel
Brett Pingree, VP America’s
Northern Power Systems
March 9th, 2011
Agenda
Why No Diesel?
Similarities to Isolated Arctic Grid Projects
Overview of Project
What Does the All RE Model Look Like?
Project Details
Challenges to Project
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
Why No Diesel?
Hedge Against Rising Costs (and Procurement) of Diesel
Acquisition
Limited Hazardous Waste Impact
Reduced Acoustic Impact
Save on Fuel Storage Costs
Significantly Increase Safety
Make a Green Statement (Marketing)
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
Similarities to AK Isolated Grid Projects
Expensive Diesel!!
Difficult Access to Sites
Cranes, Heavy Equipment, and Skilled Labor
Weather (Hurricanes and Extreme Heat)
Weak Grid, Intermittent Power
Permitting and Fish/Wildlife (Iguanas and Parrots)
Soil challenges (Coral)
Salt Corrosion
Sharks instead of Bears
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
All Renewable Bahamian Resort
2 Parallel 300 kVA Static Power Invertors
5 Proven’s 15kW
2 Northern Power 100kw
4 PV arrays of 308 Panels (65kW dc) each [260 Kw total]
3 x 250kW Backup CAT Diesels
2.16 MW-Hr Battery Storage System
• 3 Battery Banks 360Vdc (180 cells (2000AHr) each)
Associated DC and AC switching
On-line June 2011
Expects to be the First 100% All Renewable Energy
Destination Resort
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
Additional Project Details
Wide Connected Load Range: ~75kW (min.) – ~300kw (Peak) expected
Daily Average Loads: 1,800 – 3,000 kw-Hr/day
Inverter-Based PV/Wind Grid
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Inverters provide system frequency & voltage reference
Very fast response to load change
Efficient energy conversion thru wide load range
Bi-directional Inverter/Charger to manage battery bank SOC
Higher degree of WTG penetration than traditional WD/diesel grid
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
Challenges to Project
Grid Impedance May Be Higher Than Typical Diesel Grid
Final System Optimization May Require Turbine Control Adjustments
Dispatch Coordination Between Inverters & WTG Critical to
Performance Stability
120 Ton Installation Crane delivery and Concrete dispatch
Unique advanced system configuration
Island time, expect the unexpected
Battery Life and Cost to Maintain
Hurricanes
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.
Promote Creative Solutions to Get Us Off Fossil Fuels!
Higher Degree of Penetration (diesel offset) Possible
Common DC Bus Supports Separate Inverter Sources for
Redundancy
• Split Power System- Balancing Different Feeds from Same
Source
Verified Inverter-Based System
Inverter Will Control Frequency & Voltage
W-D Control Integration Similar to Diesel Integration
No Fossil Fuels!
©2009. Northern Power Systems. All Rights Reserved. Not to be used or shared without permission. Proprietary and Confidential.