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Report
Maryland Clean Energy Summit
Microgrid Round Table – October 15, 2013
Energy Reliability and Security
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Are YOU Ready?
Projected Supply Shortfall
Inclement Weather
Technology is Ready - Now
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What Are Your Critical Issues?
$$ Economics
Snow Storms
Energy Security
Earthquakes
Protect Research
Mission Critical Activities
Retaining Top Students
and Faculty
Energy Reliability
Economic Development
Ice Storms
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Educational
Offerings
Hurricanes
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The Case For Micro-Grids
Heavily burdened, aging electrical grid
The toll of power disruptions
4
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5
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How a Microgrid Works
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White Oak Microgrid
Definition
White Oak FDA Microgrid
Local Power Generation
• 26MW power supply (currently being expanded
to 55MW to handle the installation’s peak load)
• Leverage waste heat (Trigen) to condition
buildings
• Puts more power on the grid than it takes off
Co-exist With The Utility
• Works in parallel with Pepco under a three-party
Interconnect Agreement.
• Participate in demand response events
• Utilize spinning reserve to maintain energy
surety
Can Operate Totally Independent of Utility
Grid (Islanding Capability)
• Operate mission critical functions independent
of Pepco, enabling FDA to continue operations
regardless of what happens outside the campus
Ability to Manage and Control Your Local
Load
• Match load to supply
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• Ability to make power purchase decisions
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FDA White Oak Challenge
Mission:
• Campus integrates FDA’s functions to increase scientific
synergy and collaboration.
• Protect consumers from unsafe products, address threats
before they arise, and help deliver safer foods and safer,
more effective medical therapies.
Needs:
• Energy Security
• Energy Surety
• Energy Efficiency & Renewable Energy Mandates
• Ability to Expand as Campus Expands
Requires an
islanded microgrid
to meet GSA/FDA
requirements
Challenges:
• Budget Constraints (New Construction ESPC)
• Ability to Balance Sometimes Conflicting Needs
• Aging Utility Infrastructure
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Optimization – Key to Success
Initial Strategy
Current Operations
Near continuous
operation of enginegenerator
Real-time “make or buy” decision
based upon cost of natural gas,
electric tariff, campus loads vs.
engine & cogeneration efficiencies
Additional Value:
•
•
•
•
Expanded Auto Load Shed Scheme
Additional Dual-fuel Generation Assets
Combined Heat and Power – Maximizing BTUs
Interconnect Agreements With the Utility
Honeywell, GSA and FDA Work Together to Operate the
Facility in the Best Interest of the Government.
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Innovative ECMs
Combined Heat &
Power (Trigen)
Waste heat utilized to heat/cool buildings.
More BTUs for every KW.
New Construction
Quantified above standard efficiency in new buildings, purchased
equipment and provided funding.
Chilled Water
Thermal Energy
Storage
Water supply was single point of failure – needed to keep cooling
towers operational. Chilled Water Storage connected to towers
mitigating risk.
Automated
Demand Response
(Auto DR)
Instituted capability to participate in Pepco Gold Days putting
power back on the grid when requested.
Eliminated peak load charges as well.
Biofuels
Adding capability to use biofuels for fuel flexibility for energy
security and increasing options if natural gas prices increase.
Lowered Total Energy Consumption Through Both Innovative
and Traditional ECMs Throughout The Entire Campus.
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Reliability Enhancements
• Utility Service Enhancements
– Physical and Functional Separation of Utility Generation Systems
– Electrical Bus Ties between Central Utility Plants (CUP) 1 and 2
– Dual Distribution Loop For Redundancy
• Two Additional Black Start Generators
• CUP and Building Level Load Shed
Electricity Produced
Turquoise -CUP Generators
• Thermal Energy Storage
Blue - Photovoltaic Arrays
– Electrical Load Shed of Chillers
81,081
– Backup Water Supply 100,000.0
75,179 76,559
67,597
MW hrs
80,000.0
60,000.0
31,523
40,000.0
20,000.0
19,395
5,940
13,886 12,847
21.9
29.4
30.4
34.3
36.0
33.7
36.8
24.7
26.7
2004
2005
2006
2007
2008
2009
2010
2011
2012
0.0
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PV Total
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Reliability Features
• Fast, Dependable Separation From Utility Instability
–
–
–
–
Reliable Detection of Utility Deviations
Instantaneous Separation to Island Mode
Operation With Adequate Spinning Reserve
Smooth Generator Transition To Load-Sharing Island Mode Control
• Fast Load Management for Generator Demand Control, When Required
–
–
–
–
Accurate Real-Time Generator Capacity and Spinning Reserve Assessment
Fast Updated Load Measurement
Fast Load Shed of Prioritized Demands
Coordinated Load Restoration Process
• Synchronized Transfer from Island to Utility Parallel Operation
• Black Start Capability to Island Mode Operation
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Reliability Metrics
Uptime
Redundancy
Island Mode
Power
Generation
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Uptime over the last 12 months is > 99.999%.
Redundancy provided for all critical systems.
Islanded, either automatically or manually, more
than 70 times over the past 2 ½ years.
Operations have not been interrupted for any
weather related events.
On a yearly basis more power is supplied to
Pepco than Pepco supplies to the White Oak
Campus.
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The Benefits
• Annual Energy Savings
– Current: 640,000 MMBtu
– Under Construction: 275,000 MMBtu
• Pollution Prevention (annual)
– Current: 50,000 metric tons CO2-equivalent
– Under Construction: 22,000 metric tons CO2equivalent
• Co-Generation reduces GSA NCR Demand
– Response during “Gold Days” (approximately 22
MW currently; nearly 33 MW
post-ESPC III Base)
• Rainwater Harvesting
– Makeup water for cooling towers
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30% Reduction
from Baseline
Equivalent to 15,000
Cars Removed from
Road
$3M in Demand
Savings and
Program
Participation
Good water
stewardship
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Summary of Benefits
•
•
•
•
•
•
•
•
•
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Reduced First-Cost to Government
Reduced Recurring Costs to Government
More Energy Efficient Campus
Fixed Accountability for Systems Performance
Flexibility to Meet Evolving Program Requirements
Adaptive Re-use of Historic Structures
Demand Response Capability ($ to GSA)
Ability to Continue Mission Independent of the Grid
Enhanced Energy Security
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THE CITY OF
Wilmington
DELAWARE
Hay Road Waste Water Treatment Plant
Renewable Energy Biosolids Facility
Maryland Clean Energy
October, 2013
In June 2009, Wilmington initiated a Project to
 Reduce energy and operational costs
 Reduce greenhouse gas emissions
 Insulate the City from future electricity and biosolids cost
escalation
 Two phases:
 Phase I completed in September 2011.
 The REBF is Phase 2.
 Honeywell guarantees cost savings over a 20 year period
Overview of Projects
 PHASE 1 completed October 2011
• Solar Panels at Porter and Municipal Complex
• Building Energy Savings
• LED Traffic Lights
• Water Pumping Peak Load Shift
 PHASE 2
• 4 Megawatt Electricity Generation Using
Renewable Fuels
• Dry 140 Tons Per Day of Wastewater Sludge
• Estimated to Save Over $16 million
Landfill
Gas Plant
Cherry Island
Landfill
Landfill
Gas Plant
Wilmington Microgrid – What Has Been Accomplished
Traditional Efficiency
Improvements
•
•
•
•
Energy Conservation Measures
Water Pumping Peak Load Shift
Led Traffic Signal Retrofit
Dry 140 Tons a Day or Wastewater Sludge
On-site Generation
and Storage Capacity
• Solar Panels at Porter and Municipal Complex
• 4 Megawatt Electricity Generation Using Renewable Fuels
Implement Advanced
Controls
• Balance System Supply and Demand
• Optimization of Power System Based on Performance
Metrics
Operate with Utility
Grid or in Island Mode
• Phase Two of Project is Deploying a Microgrid That Can
Support The Grid and Or Go Into Island Mode
REBF Project Benefits
 Save $16.7 Million Over 20 years
 >$800,000 Reduction in Annual Costs
 Achieve budget certainty
 Fix Electricity and Biosolids Costs Over 20 years
 Reduce Greenhouse Gas Emissions by 15,000 Metric Tons Per Year
 Exceeds 20% Greenhouse Gas Reduction Goal
 Over 50% of Wilmington’s Electricity Requirements Will Be Met By Its
Own Renewable Energy
 Spend Locally
 Avoid Exported Utility and Sludge Hauling Costs
 The Majority of Construction Subcontracts Go to Local Firms
 Over 100 Local Construction Jobs
 All Labor Drawn from Wilmington Locals
Thank you.
[email protected]

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