grid impact of pev charging
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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Grid Impact of PEV ChargingPossible Consequences
Jan BermanSr. Director, Policy & Integrated PlanningIntegrated Demand Side Management Customer Care06 August 2010
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PEV Charging Creates a PEV Charging Creates a Significant Increase In LoadSignificant Increase In Load
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
BEV @ 240V/30A
San Ramon
Rocklin
Fresno
Vacaville
Berkeley
San Francisco
kW
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
240V/30A
4 hours
240V/15A
8 hours
120V/12A
Rate of chargeRate of charge
BE
V R
ech
arg
e ti
me
BE
V R
ech
arg
e ti
me 16 hours
3
The Existing Grid
SubstationCustomer
Customer
Customer
Customer
CustomerCustomer
Generation
Transmission
Customer
Switching Device
4
Scenario 1: Two PEVs in Berkeley, Two Circuits
SubstationCustomer
Customer
Customer
Customer
CustomerCustomer
Transmission
Customer
Generation
Switching Device
5
Scenario 2: Two PEVs in Berkeley - Single Circuit
SubstationCustomer
Customer
Customer
Customer
CustomerCustomer
Transmission
Customer
Generation
Switching Device
6
Zip code level
Specific Notification Drives Proper Upgrade Planning
SubstationCustomer
Customer
Customer
Customer
CustomerCustomer
Transmission
CustomerAddress level
Switching Device
Generation
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24 Hour Total Loading of Single Feeder - July 27, 2007
4000
5000
6000
7000
8000
9000
10000
11000
12000
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
To
tal L
oad
ing
at
Su
bst
atio
n (
KW
)
Base Load Scenario (no PHEV)
Case 1:- Do nothing (charge @6pm)
Case 2:- TOU rates only (charge @9pm)
Case 3:- TOU rates and Smart Charging (charge @9pm-1am)
When most customers
arrive home
When most customers
arrive homeoff-peak load
Left Unmanaged, PEV Load Will Left Unmanaged, PEV Load Will Add to Peak Electric DemandAdd to Peak Electric Demand
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
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
8Bay Area EV Adoption and Load Bay Area EV Adoption and Load Forecasts CorrelateForecasts Correlate
Cities with most hybrids per zip code
No CityHybrid
registration*Hybrids per
zip code Transformers1 MENLO PARK 1,139 1139 1,476 2 CUPERTINO 1,114 1114 2,140 3 SAN CARLOS 694 694 1,366 4 ORINDA 693 693 1,674 5 EAST PALO ALTO 681 681 513 6 FOSTER CITY 623 623 700 7 SONOMA 602 602 579 8 MILL VALLEY 1,187 594 825 9 EL DORADO HILLS 554 554 1,595 10 NAPA 1,057 529 3,194 11 PLEASANTON 1,045 523 2,898 12 LIVERMORE 1,551 517 3,531 13 BELMONT 503 503 1,000 14 LINCOLN 491 491 2,151 15 MARTINEZ 483 483 1,801 16 DANVILLE 964 482 2,295 17 PLEASANT HILL 467 467 1,686 18 BURLINGAME 908 454 1,174 19 SAN RAMON 902 451 1,751 20 SARATOGA 868 434 1,923
PG&E EV Load Forecast Nissan Leaf Reservations
* Hybrid registrations from 2004 to 2008, source: Polk & Co.
2007 Outage Density(# of outages per distribution transformer)
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PG&E is Committed to PEVs
