Frankfurt (Germany), 6-9 June 2011

MESSIAS – PT – S5 – 0294

Optimizing the EV electrical demand impact

CIRED, Frankfurt, 9 June 2011

Frankfurt (Germany), 6-9 June 2011

MESSIAS – PT – S5 – 0294

ASSUMPTION

EV inevitability

RESULT

Each house will have at least one new electric device to plug-in, which alone represent a charge equivalent to a typical house in Portugal (3,45 kVA)

CHARACTERISTIC

Possible off-peak charge

OPPORTUNITY

Increase the efficiency of the entire electrical system, flatting the load diagram

Frankfurt (Germany), 6-9 June 2011

MESSIAS – PT – S5 – 0294

ADDING EV TO GENERATION DEMAND

EV charge in today’s off-peak hours (lowest price)

Results

New peak

Unsustainable off-peak hours incentive

New peak

Old peak

Winter load diagram

+20%

-40%

EV perfect distribution charge in night off-peak hours

Requirements

Comprehensive off-peak tariff schedule

Management charging systemsWinter load diagram

-40% -10%

Frankfurt (Germany), 6-9 June 2011

Summer load diagram

MESSIAS – PT – S5 – 0294

ADDING EV TO GENERATION DEMAND

Winter load diagram

EV charge

EV perfect distribution charge in night off-peak hours

Requirements

Comprehensive off-peak tariff schedule

Management charging systemsWinter load diagram

Competitive day light charging points

Frankfurt (Germany), 6-9 June 2011

Distribution Transformer

Delivery Point

EB EBEB

DTC DTC

EB

LAN

Local Control(sensors, control, …)

Local devices(metering, sensors,

actuators, …)

User interface

Local Interaction

Consumer/ Producer

Remote interaction

Central

SCADA/ Distribution Management

System

Metering and Energy Data Management

Data/Service Providing Stakeholders

Distribution Network Electrical Infrastructure

Technical Architecture of Reference

WAN

Services Oriented Architecture (SOA)

LAN

HAN

Internet

PLC, GPRS, …

PLC, GPRS, …

GPRS, ADSL, IP …

DTC – Distribution Transformer Controller

EB – Energy Box

WAN – Wide Area NetworkLAN – Local Area NetworkHAN – Home Area Network

ZigBee, …

MV/ LV

ADDING EV TO LV NETWORK

MESSIAS – PT – S5 – 0294

Frankfurt (Germany), 6-9 June 2011

MESSIAS – PT – S5 – 0294

ADDING EV TO A SUBURBAN RESIDENTIAL AREA NETWORK

EV charge in today’s off-peak hours (lowest price)

Results

New peak

Unsustainable off-peak hours incentive

New asset investment (lowering utilization factors)

New peak

Old peak

EV perfect distribution charge in night off-peak hours

Requirements

Comprehensive off-peak tariff schedule

Local management charging systems

Charge transfer (competitive day light charging points)

EV charge

Frankfurt (Germany), 6-9 June 2011

MESSIAS – PT – S5 – 0294

ADDING EV TO A SUBURBAN RESIDENTIAL AREA NETWORK

Highest risk in low consumption areas than in already

higher consumption areas

New peakOld peak

High consumption residential area with two EV by

customer

Winter load diagram

EV charge

Frankfurt (Germany), 6-9 June 2011

TODAY’S LV CUSTOMERS BEHAVIOUR

MESSIAS – PT – S5 – 0294

Customers’ adherence to tariff incentives

Finding

Adherence not higher than new customers

Poor incentive? Customer poor information?

Customer doesn’t have information to perceive benefits!

Customers consumption and their tariff

Finding

31% of LV customers would potentially benefit

1,8 M (31%)

Frankfurt (Germany), 6-9 June 2011

CONCLUSION

MESSIAS – PT – S5 – 0294

EV an opportunity to increase the electrical system efficiency requiring:

Comprehensive tariff schedule to enable load management all day long;

Competitive day light charging points to take advantage of middle of day off-peak

hours and postpone DSO investment;

Smart-grid

to empower customers to evaluate their consumption situation and perceive

tariff benefits;

to support management charging systems and services;

to support DSO activities enabling prompt mitigation actions.