Electric Vehicle Integration into Modern Power NetworksDTU - Technical University of DenmarkDepartment of Electrical Engineering

This course is intended for professionals of electric power and control systems, power system consultants, researchers and post-graduate and ph.d.-students.

Electric Vehicle Integration into Modern Power NetworksDTU - Technical University of DenmarkDepartment of Electrical Engineering

This course is intended for professionals of electric power and control systems, power system consultants, researchers and post-graduate and ph.d.-students.

the Grid-Integrated Electric Vehicle

byWillett Kempton

College of Earth, Ocean, and EnvironmentDepartment of Electrical and Computer Engineering

Center for Carbon-free Power Integration

University of Delaware

Lyngby, Denmark, 22 Sep 2010

the Grid-Integrated Electric Vehicle

byWillett Kempton

College of Earth, Ocean, and EnvironmentDepartment of Electrical and Computer Engineering

Center for Carbon-free Power Integration

University of Delaware

Lyngby, Denmark, 22 Sep 2010

What is an Electric Vehicle?

What is an Electric Vehicle?

What is an EV... WHEN DRIVING?

• Must perform as a Motor Vehicle

• Must meet codes and safety standards

• Must meet driver expectations for mobility, performance

What is an EV... WHEN PLUGGED IN?

• A Load (Conventional View)

• A Smart Load (1st refinement)

• A Storage Resource (2nd refinement)

• Distributed Storage at the ends of the distribution system

• A dispatchable storage resource for a world of variable generation

The Grid-Integrated Vehicle, with

Vehicle-to-Grid power

The Grid-Integrated Vehicle, with

Vehicle-to-Grid power

EV as loadEV as load

GIV: Control by GridGIV: Control by Grid

GIV+V2G: 2-Way Power FlowGIV+V2G: 2-Way Power Flow

Basic GIV/V2G Math• US car used 1 hour/day, parked 23 h/d

• Battery 150 km, daily travel = 50 km, thus

• Most storage unused most days• Drive train output = 100 kW

• Practical power via US grid = 10 - 20 kW

• In EU, some residential only 3.6 - 6 kW

• Cars as significant power? Compare:

• Average load with power in cars, by country

How Much Power in cars?

Denmark UK USA

Light vehicles (106) 1.9 28.5 191

Vehicle GW (@ 15 kW each) 29 427 2,865

Avg. Electric Load (GW) 3.6 40 417

UD Developed GIV components

UD Developed GIV components

Three Components of GIV

• VSL: Vehicle Smart Link

• Control charging, report to server

• Log or predict next trips and times

• EVSE: Electric Vehicle Supply Equipment

• Grid location, internet portal, power connection, interconnect permit

• Aggregation Server

• Real time operation of a set of vehicles

Vehicle Smart Link (VSL)

Vehicle Smart Link (VSL)

Vehicle Smart link (VSL) in Car

• No moving parts, fits under dash

• Receives signal from coalition server

• Reports capacity and current state back to coalition server

• Attempt to predict next use of car (time, distance)

• Automotive-grade Linux computer

VSL

VSL Licensee

VSL, licensed from UD, Built in to cars during

vehicle assembly

EVSEEVSE

EVSE prototype now being field tested

EVSE prototype now being field tested

EVSE prototype now being field tested

EVSE prototype now being field tested

With EV simulatorWith EV simulator

Vehicle AggregationServer

Vehicle AggregationServer

Motivation

• TSOs control many-MW power plants• EVs 3–19 kW

• TSOs require predictable power resources

• Cars drive away, sometimes unpredictably

• Contract minimum:• 1 MW minimum for PJM regulation market (US)

• 10 MW minimum for Energinet.dk

The Aggregator

• Provides a single, large, stable and reliable power source

• TSO does not see details of single cars, only sees aggregate

• Aggregator participates in TSO market

• Bids in power market

• Dispatches TSO Requests to vehicles

Aggregator software manages complexity

• Insure each vehicle is has enough charge for next trip, while dispatching idle storage capacity

• Calculate how much capacity to offer in the market

• Dispatch ISO/TSO regulation service requests

• And other services ...

Coalition Server

Testing: Signal response

• Power response is very close to command signal.  

• Far higher fidelity than any rotating equipment.

Power marketsPower markets

Sequence of Markets

• High-value markets, are ancillary services (A/S)

• Frequency regulation

• Spinning reserves

Sequence of Markets

• Later -- larger markets, lower value per kW

• Defer upgrades to distribution feeders, transformers

• Peak load reduction, valley filling

• Power factor correction

• Balancing wind, reducing ramp rate

• Shifting solar peak to load peak

Favorable Rules and Laws

Favorable Rules and Laws

Permitted by Load-Serving Entity (local utility)

Permitted by Load-Serving Entity (local utility)

“meets IEEE 1547 standards”

Law to codify interconnects, net metering for V2G

Define:

Grid-integrated electric vehicle

Aggregator

law to codify interconnects

Net metering for V2G

Interconnection requirements, etc same as distributed renewables

Net is at rate at time of use

Interfacing with OEMsInterfacing with OEMs

Documentation for partners

Modularized interfaces

PatentsPatents

Patents

• Patent Applications, 2007-2010:• U.S. Patent Application Publication Nos. 2007/0282495 A1

"System and Method for Assessing Vehicle-to-Grid (V2G) Integration" filed May 2007 (UD; Kempton and Tomic)

• U.S. Patent application publication No. "Hierarchical Priority and Control Algorithms for the Grid-Integrated Vehicle", filed March 2009, (UD; Kempton)

• Three US and PCT applications in 2010, Electric Vehicle Station Equipment for Grid-Integrated Vehicles; Electric Vehicle Equipment for Grid-Integrated Vehicles; Aggregator Server for Grid-Integrated Vehicles. Filed Sept 2010 (UD; Kempton and co-inventors)

So even when your car is parked, it is working

earning money for you

So even when your car is parked, it is working

earning money for you

Thanks to our sponsorsThanks to our sponsors

ENDENDMore information:

www.udel.edu/V2G

www.magicconsortium.org

More information:

www.udel.edu/V2G

www.magicconsortium.org