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Duke Energy Indiana: Overview of Renewable Energy, Distributed Generation, Energy Storage and Electric Vehicles. July 23, 2013. Agenda. Duke Energy offerings: Net metering Qualifying Facility Tariff GoGreen Power Emerging Technology Department Electric Vehicle Energy Storage

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Duke Energy Indiana:Overview of Renewable Energy, Distributed Generation, Energy Storage and Electric Vehicles

July 23, 2013


Duke Energy offerings:

  • Net metering
  • Qualifying Facility Tariff
  • GoGreen Power
  • Emerging Technology Department
    • Electric Vehicle
    • Energy Storage
  • Commercial Renewable Energy
net metering by the numbers duke energy indiana
Net Metering* by the Numbers– Duke Energy Indiana
  • 207 current customers:
    • 18 schools
    • 157 residential
    • 32 commercial
  • Of these, 51 were new in 2012
  • Current composition:
    • 994 kW solar
    • 1305 kW wind
    • Total = 2299 kW
  • Of the 207 customers:
    • 176 solar
    • 31 wind

* Rider No. 57

qualifying facility tariff rider no 50
Qualifying Facility Tariff (Rider No. 50)
  • Available to any customer
  • 2 options:
    • Energy only
    • Capacity and Energy
  • Payment is based on proscribed IURC avoided cost methodology
  • Tariff is updated and approved by IURC annually
  • Current tariff:
    • $.028451/kWh
    • $7.05/kW-month (dependent on capacity factor during on peak periods)
  • Under a separate tariff (No. 51- Parallel Operation of Customer Owned Generation), Duke Energy Indiana has the option to purchase generator output at a negotiated rate, subject to IURC approval
gogreen power tariff rider no 56
GoGreen Power Tariff (Rider No. 56)
  • Gives customers the ability to support the development of green power sources throughout the state and the region
  • Customers can purchase a minimum of two 100-kilowatt-hour (kWh) blocks of green power for $2 a month
  • Price per block has over life of program been reduced from $2.50 to $2.00 and then to $1.00. Agreed with OUCC to further reduce to $0.90 in early 2014 if GoGreen revenues are sufficient.
  • A 200 kWh commitment
    • equates to about 20 percent of an average residential customer’s electricity use
    • helps to avoid 4,800 pounds of carbon dioxide emissions each year
  • As of June 30, 2013:
    • 1,359 customers
    • 812,800 kWh per month
  • GoGreen not subsidized by non-participating customers
in development nc green tariff google
In Development - NC Green Tariff (Google)
  • Responsive to customers’ desire for a “green power rate” (without having to actually own the assets)
  • July commitment to file tariff application
    • Filing for Duke Energy Carolinas – NC characterized as a pilot offering
    • Structural elements of program to be included in filing
  • Program parameters under development:
    • Customers on select rate schedules can participate
    • New and existing load eligible
    • Per customer and aggregate program limits
    • Structure gives consideration to:
      • Customer alternatives for Green Energy
      • How best to position this initial filing to enable expansion to additional jurisdictions and additional customer classes
    • Sourcing from Duke Energy-owned resources and the market
emerging technology office
Emerging Technology Office

Technology Categories






Energy Storage


Electric Vehicles

Future Adv. Nuclear

Smart Grid

Emerging Technology Strategic Objectives

External engagement and leadership

Technology assessment and development process+

Identify and assess emerging technologies to evaluate opportunities for and threats to Duke Energy’s business model

Facilitate technology adoption across impacted business units

Shape technical and market development for new technologies

  • Establish Duke Energy’s public reputation as a leader in understanding, developing and applying technology in the utility industry

Identify Opportunities


project plug in
Project Plug-IN
  • Partially funded by DOE
  • Goal: Deploy EV and Smart Grid related infrastructure
  • Numerous partners involved throughout the State of Indiana

Vehicle Data



electric vehicle charging infrastructure
Electric Vehicle Charging Infrastructure
  • Duke Energy has installed:
    • 85 residential units
    • 10 units at state parks   
    • 10 units at Plainfield campus
    • 39 commercial units
    • Total: 144
energy storage
Energy Storage

Through pilots we understand…

…to develop

Capital Costs

O & M Costs

Installation Hurdles

Operational Issues

Value Streams

Business models

Regulatory models

Understand benefits



Clay Terrace Energy Storage System

Carmel, IN

  • Major system components:
  • 75 kW / 42 kWh system capacity
  • Toshiba lithium titanate battery
  • 9.8 kW roof-mounted solar
  • Toshiba microEMS optimization
    • Eaton 50 kW, Siemens 3.3 kW PEV charging stations
  • Interconnection:
  • Behind a commercial meter (customer sited)
  • Interconnected at 208V, 3-phase transformer
  • Located at Clay Terrace mall in Indianapolis

System attributes

Battery + Toshiba microEMS

75 kW / 42 kWh Toshiba Li-Titinate

Applications being tested

10 kW solar roof-top

1 – active management of combined solar, storage and PEV charging (Micro-grid application)

a) testing energy management system and sizing of a behind-the-meter system

2 – Energy shifting

3- Renewable Smoothing

4 – customer-sited installation aspects

Level 2 PEV charging station

J1772 up to 3.3 kW charging

PEV DC Fast charging station

50 kW Eaton unit


Notrees Wind Farm Project

Notrees, TX

  • Major system components:
  • 36 MW / 24 MWh
  • Xtreme Power Advanced Lead Acid Technology
  • Co-located at site of 156 MW Wind Farm in Notrees,
  • Texas
  • Began commercial operation in December 2012
  • 50:50 Cost share with DOE

Applications being tested:

  • Ancillary Services
  • Energy Shifting
  • Avoidance of Wind Curtailment

McAlpine Energy Storage System

McAlpine Creek Retail Substation, Charlotte, NC

  • Major system components:
  • 200 kW / 500 kWh system capacity
  • BYD battery and inverter system
    • All components integrated within on container
    • Lithium-iron-phosphate battery (BYD)
  • Interconnection:
  • Located on a 24 kV distribution circuit
  • Interconnected immediately outside of the substation
  • Adjacent to 50 kW solar facility on McAlpine test circuit


Integrated within one container

BYD battery

200 kW/500 kWh LiFePO4

System attributes

Applications being tested

  • Installation Sep - Oct 2012, In service 4Q 2012

1 – consolidated inverter/battery

2 – energy shifting applications

a) dispatched based on schedule, local load peaks, etc

3 – integration with solar in a microgrid

a) will be configured with switches, solar, and load to create an autonomous microgrid that disconnects from the circuit

4 – solar output smoothing/firming

  • Interconnected next to a 50 kW solar facility in a planned islandable micro-grid scheme that will use the battery for grid frequency/voltage regulation.



Community Scale Second Life Battery

Li-Ion Chevy Volt batteries

24 kW / 30 kWh

University of Florida

  • Major system components:
  • 24 kW / 30 kWh system capacity
  • Li-ion batteries designed for use in a Chevy Volt
    • 24 kVA inverter system – ABB
  • Interconnection:
  • Located on a 120V/240V split single phase service
  • At least one customer will be connected via the CES unit
  • Specific customer TBD

Battery container

Above ground


24 kVA capacity

System attributes

Applications being tested

  • Planned installation in 2-3Q 2013

1 – use of recycled electric vehicle batteries

a) represents a potential low cost source of utility storage

b) supports PEV economics

2 – community-scale storage applications

a) energy shifting

b) islanding/back-up power

c) automatic voltage control

  • Will demonstrate a potential “second-life” battery application.
  • Increases residual value of PEV’s and may provide low cost source of utility stationary storage.