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Grid Impact of PEV Charging. Possible Consequences. Jan Berman Sr. Director, Policy & Integrated Planning Integrated Demand Side Management Customer Care 06 August 2010. PEV Charging Creates a Significant Increase In Load. Customers will prefer a 240V charge to shorten recharge times.

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Grid impact of pev charging

Grid Impact of PEV Charging

Possible Consequences

Jan Berman

Sr. Director, Policy & Integrated Planning

Integrated Demand Side Management Customer Care

06 August 2010


Pev charging creates a significant increase in load
PEV Charging Creates a Significant Increase In Load

Customers will prefer a 240V charge to shorten recharge times

PEV charging is a large load for PG&E customers, comparable to average peak summer load of a single home

BEV Recharge time

16 hours

8 hours

4 hours

120V/12A

240V/15A

240V/30A

Rate of charge


The existing grid
The Existing Grid

Generation

Customer

Customer

Transmission

Substation

Customer

Customer

Customer

Customer

Switching Device

Customer


Scenario 1 two pevs in berkeley two circuits
Scenario 1: Two PEVs in Berkeley, Two Circuits

Generation

Customer

Customer

Transmission

Substation

Customer

Customer

Customer

Customer

Switching Device

Customer


Scenario 2 two pevs in berkeley single circuit
Scenario 2: Two PEVs in Berkeley - Single Circuit

Generation

Customer

Customer

Transmission

Substation

Customer

Customer

Customer

Customer

Switching Device

Customer


Specific notification drives proper upgrade planning

Zip code level

Address level

Specific Notification Drives Proper Upgrade Planning

Generation

Customer

Customer

Transmission

Substation

Customer

Customer

Customer

Customer

Switching Device

Customer


Left unmanaged pev load will add to peak electric demand
Left Unmanaged, PEV Load Will Add to Peak Electric Demand

24 Hour Total Loading of Single Feeder - July 27, 2007

12000

11000

10000

9000

When most customers arrive home

8000

Total Loading at Substation (KW)

off-peak load

7000

6000

Base Load Scenario (no PHEV)

Case 1:- Do nothing (charge @6pm)

5000

Case 2:- TOU rates only (charge @9pm)

Case 3:- TOU rates and Smart Charging (charge @9pm-1am)

4000

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

Hours

Source: EPRI.

Note: Feeder of Northeastern utility feeder during urban summer peak with 2,778 residential customers. PEV penetration = 10%.

Case 1 – 3 charge @ 240V, 12A


Bay area ev adoption and load forecasts correlate
Bay Area EV Adoption and Load Forecasts Correlate

Cities with most hybrids per zip code

PG&E EV Load Forecast

Nissan Leaf Reservations

2007 Outage Density

(# of outages per distribution transformer)

* Hybrid registrations from 2004 to 2008, source: Polk & Co.



Thank you

Thank You

Contact:

jsb1@pge.com