2018 Summer Forum
Distributed Energy & Microgrid
Solutions
July 2018
Where We Are
We Design & Build Infrastructure
End‐to‐End Capabilities Planning, Design, Engineering, Procurement, Construction
Microgrid Definition
“A microgrid is a group of interconnected loads and
distributed energy resources within clearly defined
electrical boundaries that acts as a single controllable entity
with respect to the grid. A microgrid can connect and
disconnect from the grid to enable it to operate in both
grid-connected or island-mode.”- the U.S. Department of Energy
Microgrid Definition
“A microgrid is a group of interconnected loads and
distributed energy resources within clearly defined
electrical boundaries that acts as a single controllable entity
with respect to the grid. A microgrid can connect and
disconnect from the grid to enable it to operate in both
grid-connected or island-mode.”- the U.S. Department of Energy
Essence of a Microgrid
Microgrid
Point of Common Coupling
Point of Common Coupling
Load Balancing Controls
Load Balancing Controls
Dispatchable GenerationDispatchable Generation
Where Microgrids / Resiliency Live
Controls• ADR• SmartGrid
Generation• DER• Storage
Other Tech• Blockchain• Smart Cities
Historical View of Microgrids
► Strictly for Customer Energy Resilience
► Typically Diesel Generation Based
► Life Safety & Other Critical Functions
Microgrid Evolution
► Microgrids Now Contain Assets which are Installed Primarily for Utility-Tied Operation
► No Source of Energy is Out of Bounds
► Multiple Modes of Operation -Both Grid Tied and Islanded
Where We are Headed
► Microgrids with Resiliency as a Secondary Function
► Utilities Adopting New Rate Structures to Profit from Microgrid Capabilities
► Utility-Owned Storage Enabling Multi-Customer Microgrid Clusters
► Cyber Security is an Unending Challenge
► Dispatchable Generation
► Highly Elastic Load
► Dispatchable Reactive Power
► Energy Storage
How Microgrids May Benefit Utilities
Pilo
t /
Dem
ons
trat
ion
Pro
ject
s
• Typically Focused on Renewables & Storage
• Usually Designed to Demonstrate Everything in One Project
• Typically Very High Profile Projects St
rand
ed /
Iso
late
d C
usto
mer
s
• Commonly for Remote Communities
• Customers in Need of High Cost Infrastructure Changes
• Fossil-Fuel and Energy Storage Focused
Uti
lity
/ C
usto
mer
Par
tner
ship
s
• Typically Financially Driven
• Favors Non-Regulated Utility Entities
• Win/Win Focused Approach
Common Utility Microgrid Models
Push for Community Microgrids
► Backup to the Backup for First Responders, Critical Services, and Areas of Refuge
► Citizens Need Electricity for Safety and Security
► Growing Number of EVs
Federal Government Push for Resiliency
► Greater Dependence on Electronics at All Levels of Government
► Leaner Military has Resulted in a Great Deal of Theater Command and Control being Located in the US
► High Performance and Net Zero Buildings are Useless without Utility Power
Uti
lity
Pri
vati
zati
on
(UP
)
• DOD May Sell Utility Infrastructure Inside the Fence
• Purchaser Provides Utility Services for Up to 50 Years
• Additional Services May be Added to the Contract
Uti
lity
Ene
rgy
Serv
ices
Co
ntra
ct
(UE
SC)
• Open Only to Serving Utility Companies
• Financed by Utility Bill Savings
• Up to 25 Year Payback Allowed
Enh
ance
d U
se L
ease
(E
UL)
• Open to Any Entity
• Trades Use of Federal Land for Monetary or In-Kind Consideration
• Up to 75 Year Agreement
Federal Government Teaming Programs
Example #1
Schofield Generation Station
HECO Schofield Barracks Power Plant
► Enhanced Use Lease (EUL)► Partnership between the Army,
State of Hawaii, and Hawaiian Electric
► 50MW biofuel distributed generation for system stability, peaking
► Power plant maintains power to DOD operations in islanded mode when utility is lost
Benefits
► Emergency power directly to Army and National Guard units
► Centrally located generation plant for protection from tsunami
► Allows increased wind and solar in HECO grid
► Allows HECO to deactivate older, less efficient generating units
Utility Interaction
► Solar Chasing► Localized Resiliency► Black Start of Grid
Example #2
CMEEC & US Dept of NavySUBASE New London
SUBASE New London
► US Navy’s Primary East Coast Submarine Base
► Home Port for Both Los Angeles and Virginia Class Subs
► Originally Slated for Closure as Part of 2005 BRAC but Removed from Final List
CMEEC & State of Connecticut DEEP
► CT Dept of Energy & Environmental Protection Created Microgrid Grant Program in Response to Superstorm Sandy
► CT Municipal Electric Energy Cooperative Wants to Site 8MW of Natural Gas Fuel Cells in Groton
► SUBASE New London Needs Energy Resiliency but Lacks Funding to Execute on Its Own
New London Microgrid
► Enhanced Use Lease (EUL)► CMEEC Gets Land for Fuel Cells
and Interconnection to SUBASE’sElectrical System
► SUBASE Gets Fully Functional Microgrid Utilizing Existing Gas Turbine and Diesel Generators with New Fuel Cells to Repower Entire Base
Example #3
Minnesota Power & Camp Ripley
Camp Ripley
► 53,000 Acres► Training Center for Troops
& Police Worldwide► Potential Relocation Site
for State Government► Very Focused on Sustainability
MNP Solar Array
► MNP Needed Additional PV for Renewable Energy Portfolio Requirements
► 10MW (AC) Peak Output► Physically Located within Camp
Ripley► Connected Directly to MNP
Distribution System
EUL Terms
► Typically Solar Array Directly Supplies MNP’s 35kV Distribution System
► MNP will Isolate the Camp and Make the Solar Array Available to it During Extended Outages
► MNArNG is Currently Building a Microgrid to Integrate with This Resource
► MNArNG Receives RECs Equal to All Electricity Consumed by the Camp
Example #4
Gainesville Regional Utilities & UF Shands Cancer Hospital
GRU / Shands UF Cancer Hospital
► Combined Heat and Power Plant Owned and Operated by GRU on Shands Property
► Energy Services Outsourced as Design / Build / Own / Operate / Maintain
► Utilities Include Normal and Emerg Electricity, Steam, Chilled Water, Medical Gasses, Water, Non-Potable Water, & Comm
Shands / GRU South Energy Center
► Partnership Between Hospital and Municipal Utility
► Combined Heat & Power for Efficient Generation of Utilities
► Medical Professionals Don’t Have to Think About Power
Utility Interaction
► CHP Generators Dispatched per Heat Load and Grid-Wide Needs
► Power is Routinely Exported to Grid
► Proactive Islanding of Site When Storms Approach
Example #5
Thermal Energy Corporation & Texas Medical Center
Texas Sized Capacities
► Non-profit Corporation Owned by Texas Medical Center Members
► TECO Serves 18 Million Sq Ft of Space Within the 52 TMCMember Institutions
► 120,000 Ton Chilled Water Capacity (Provisionsfor 48,000 Tons in Future)
► 900,000 lb/hr Steam Generation► 48MW CHP Turbine► 16MW Diesel Backup
TECO / Texas Medical Center
► Operating 45MW CHP Turbine in Deregulated Market Within ERCOT
► Dynamically Changes Energy Mix Based on Market Conditions
► Thermal Storage Tank for Additional Flexibility
Thermal Energy Storage
► 8.8 Million Gallon Tank
► Thermal Capacity of 64kton-hr (~64MWhe)
► Charge/Discharge at 16kgpm (~8MW)
► Provides Immediate Ride Through for Chilled Water Loss
► Allows TECO to Peak Shave & Participate in Arbitrage
Utility Interaction
► No Direct, Formal Utility Interaction
► Turbine Utilized in ERCOT’s Day Ahead Market
► Ratio of Gas / Electricity Based on Real Time Pricing of Commodities
► TECO has Dispatched Generation and Load at CNP’s Request
Example ProjectsProject Generation Energy
Storage
Utility Owned Assets
Life Safety Power
HECO Schofield Barracks 50MW Biodiesel
CMEEC / US Navy SUBASE New London
8MW Nat Gas Fuel Cell5MW Nat Gas Turbine
1.5MW Diesel
MNP / MNArNG Camp Ripley 10MW Solar6MW Diesel
GRU / Shands Cancer Center4MW Turbine6MW Gas Recip5MW Diesel
TECO Texas Medical Center 50MW Gas Turbine15MW Diesel
8MW / 64MWhChilled Water
Summary
► Microgrids Take Many Forms with Varied Ownership Models
► Utility Interaction is Driven by Customer Economics► Today’s Microgrids have Greater Capabilities than
Just kW
3 8
Customers are Continually Looking for Energy Resilience Options with or
without Their Utility
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