Hawai’i Energy Independence: Designing a 21st Century Grid for Hawai’i

Power forever.

Ryan Hanley

Senior Director, Grid Engineering Solutions September 17th, 2015

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100% Clean Energy is Possible

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What Should a 21st Century Grid Look Like?

Clean

Affordable Reliable

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What Should a 21st Century Grid Look Like?

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How do we get there?

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Voltage &

Reactive

Power

System

Flexibility

Peak

Demand

Shaving

Contingency

Support

Engaged Customers and Smart Energy Homes

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Clean, Flexible Utility-Scale Solar + Storage

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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

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What are the challenges?

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Smart inverters improve feeder voltages

Note: Includes control of 275 inverters and 5 MW PV

Neighborhood Voltage Profile

Time

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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

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BEFORE AFTER

Flexible, distributed resources shave peak load

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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

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Collaborate to Overcome Technical Obstacles

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What do we need to do?

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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

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SolarCity and Utility Collaboration Projects

Transient Overvoltage

& Multi-Inverter Functionality

DER Aggregation

for Grid Support

Smart Inverter

Field Demonstration

Inverter Volt/VAR

Optimization & Support