Hawai’i Energy Independence: Designing a 21 st Century Grid for Hawai’i Power forever. Ryan Hanley Senior Director, Grid Engineering Solutions September 17 th , 2015
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Hawai’i Energy Independence: Designing a 21st Century Grid for Hawai’i
Power forever.
Ryan Hanley
Senior Director, Grid Engineering Solutions September 17th, 2015
SolarCity Confidential Slide 2 2
100% Clean Energy is Possible
SolarCity Confidential Slide 3 3
What Should a 21st Century Grid Look Like?
Clean
Affordable Reliable
SolarCity Confidential Slide 4 4
What Should a 21st Century Grid Look Like?
SolarCity Confidential Slide 5 5
How do we get there?
SolarCity Confidential Slide 6 6
Voltage &
Reactive
Power
System
Flexibility
Peak
Demand
Shaving
Contingency
Support
Engaged Customers and Smart Energy Homes
SolarCity Confidential Slide 7 7
Clean, Flexible Utility-Scale Solar + Storage
SolarCity Confidential Slide 8 8
Residential Load
Load
Management
Rooftop
Solar
Monitoring:
PowerGuide
Monitoring +
Control
Rooftop Solar
Ground Mount
Solar
Backup Generator Battery
Storage
Commercial +
Industrial Load
Transmission
Resilient Microgrids
SolarCity Confidential Slide 9 9
What are the challenges?
SolarCity Confidential Slide 10 10
Smart inverters improve feeder voltages
Note: Includes control of 275 inverters and 5 MW PV
Neighborhood Voltage Profile
Time
SolarCity Confidential Slide 11 11
Batteries improve circuit variability
Circuit Load Profile
2500
2400
2300
2200
2100
2000 08:00 08:07 08:14 08:21 08:36 08:43 08:50 08:57 09:04 09:12
800
600
400
200
0
-200
kW
(S
ub
sta
tio
n L
oa
d)
kW
(B
att
ery
Ch
arg
e/D
ischa
rge)
Highly Variable
Circuit Load
Battery
Smoothing
Smoothed
Circuit Load
SolarCity Confidential Slide 12 12
BEFORE AFTER
Flexible, distributed resources shave peak load
SolarCity Confidential Slide 13 13
Geographically disperse PV mitigates intermittency
Single Home 6 Homes 235 Homes
Source: SolarCity NY data sample, June 3, 2015.
PV variability diminishes with geographic diversity
SolarCity Confidential Slide 14 14
Collaborate to Overcome Technical Obstacles
SolarCity Confidential Slide 15 15
What do we need to do?
SolarCity Confidential Slide 16 16
What do we need to do?
• Empower customers to manage their energy
future
• Create opportunities for new, clean technologies
• Replace fixed, centralized baseload plants with
flexible, distributed energy resources
• Collaborate to meet technical challenges
SolarCity Confidential Slide 17 17
SolarCity Confidential Slide 18 18
SolarCity and Utility Collaboration Projects
Transient Overvoltage
& Multi-Inverter Functionality
DER Aggregation
for Grid Support
Smart Inverter
Field Demonstration
Inverter Volt/VAR
Optimization & Support
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