experiences from the stone edge farm microgrid
TRANSCRIPT
Stone Edge Farm Microgrid
Experiences from the
Jorge ElizondoMicrogrid Engineer
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Controllable Elements• Solar panels with Enphase inverters with soft-curtailment• Aquion battery system• Capstone gas turbine• Simpliphi battery system• Tesla battery system• Hydrogen Electrolyzer with fueling station• Hydrogen fuel-cells system• Motor Load control• Controllable distribution panels• HVAC
Stone Edge Farm (SEF) Microgrid Project
Introduction
Capabilities• Grid-tie mode:
• Peak shaving and load shifting• Frequency and voltage response as a single entity• Decentralized optimization
• Island mode:• Decentralized power sharing• Master swapping
• Seamless islanding / reconnection capabilities• Hydrogen production for a variety of uses
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Current players rely on customized & one-off control systems, increasing the time & cost of integration
System integration is the primary barrier for Microgrid’s adoption
Complex Systems Rigid StructureNon-Standardized Ecosystem
$
The Challenges
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CentralController(Optional)
Comm Network
Utility Operator
Loads
Solar Panels
Wind Turbines
Batteries
Diesel Generators
Gas Turbines
Control complex systems with replicable, energy agnostic intelligent nodes
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Homogenize disparate DERs into a standardized control framework
Add/remove elements seamlessly with a self-adaptable dispatch logic
Our Approach
simplifies integration and operation of DER systems by using a building-block approach
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Technology AgnosticCompatible with most industry standard protocols and interfaces, and capable of interfacing with any vendor
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3Multi-energyEncapsulate the microgrid complexity behind sophisticated and robust algorithms by exploiting analogies
Open-SourceAllow users to safely build new functionalities on top of its existing code.
4CybersecureSeparate asset control from communication channels, to provide a layer of security.
5“Selfish” operationEach asset tries to maximize its own profits, inside a well-designed game-theoretical framework
a Building-block creator®
Our Approach
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EthernetSwitch
SEF Communication Network
Central Controller / SCADA
Interaction with utility controller
L
N
E
Transfer Switches
Islanding switchHeat
Exchanger
Gas turbine
AquionBatteries
Inverter
Tesla Batteries
Inverter
H2 Fuel tanks
Electrolyzer
ESS Battery
Inverter
Heila IQ controller
Tertiary
Secondary
Primary
Levels of control
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2
3
Proposed Control Architecture for microgrids
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Fuel Cells
Inverter
Control Architecture
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Utility
DMZ Router
Internet gateway
Internet
Interaction with utility controller
Microgrid
Data / Commands
✓ Achieve system-level goals
✓ Use microgrids as resources for the utility:
Tertiary control
Utility / Market operator
Frequency support Voltage support
Energy Reserve Peak hour power
A B
C D
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Control Architecture
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Microgrids controlled as a single entity
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Sample Results
Use Case 1: Game-theoretical optimization
… to control and optimize the microgrid as a single entity.
μG Power
Set-point
Time [min]P
ow
er
[kW
]
Assets make their own decisions about their operation…
Battery 1Battery 2Gas Turbine
Time [min]
Po
we
r [k
W]
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Use Case 2: Planned Islanding
Sample Results
ATS disconnects the grid
Grid power goes to zero
Island mode
Battery real powerGrid real power
Pow
er [
kW]
Time [sec]
Example of an islanding process and subsequent operation
Battery real power
Battery reactive power
Pow
er [
kW]
Time [sec]
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Water InletWater Outlet
Heat production stopped
Heat production restored
CHP System Control
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Sample ResultsUse Case 3: Integration of variety of energy types
IM
VFDMotor
Pressure tank
Pressure sensorHeila
controller
To water loads
Water-flow sensor
Power supplyCompressor Pressure tank
Pressure sensorHeila
controllerH2-flow sensor
+ -
H2 O2
Electrolyzer
H2 H2 H2
Inverter
Voltage
Heilacontroller Current
+ -
DC/DC converter
Wat
er s
yste
mH
ydro
gen
sys
tem
Elec
tric
al s
yste
m
To H2 loads
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Power supplyCompressor
Heilacontroller
H2-flow sensor
+ -
H2 O2
Electrolyzer
H2 H2 H2
Simplified Hydrogen System
Hydrogen Tanks
+ -
Fuel Cells
Hydrogen Cars
Pressure sensor
Car fueling with locally produced hydrogen
Use Case 4: Hydrogen Production
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FROM LEFT TO RIGHT: NHAT V. MEYER (BAY AREA NEWS GROUP), JOSE CARLOS FAJARDO (BAY AREA NEWS GROUP), MICHAEL MACOR (THE CHRONICLE).
kept microgrid operational for 10 days even as 2017 California Wildfires caused outages
“Microgrid Kept Power On Even as the California Wildfires Caused Outages”
Microgrid Knowledge
In the News
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Pilot Project
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2019 Deployments
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Project 2
Customer: Utility Cooperative, DOE
Highlights:
⚫ Multi-site aggregate DER system
⚫ Behind the meter deployment
⚫ PCC at ~0 under normal operation
⚫ 100% renewable under normal operation
Location: Basalt, CO
End User: Residential Community
Project 3
Customer: Utility Company, DOD
Highlights:
⚫ Single site hybrid (DC-AC) microgrid
⚫ In-front of the meter deployment
⚫ Mission critical system
⚫ Mixed of renewable and fuel-based DERs
Location: Albuquerque, NM
End User: Air Force Base
Customer: Private Owner
Location: Sonoma, CA
End User: Vineyard
Project 1
Highlights:
⚫ Single site hybrid (DC-AC) microgrid
⚫ Behind the meter deployment
⚫ Islanded under normal operation
⚫ 100% renewable under normal operation
Stone Edge Farm Microgrid
Experiences from the
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