Duke Energy Carolinas

Facts about Duke Energy

� Fortune 500

� Assets over $48 billion

� 4 million customers

� Top-tier electric utility� Top-tier electric utility

� 150+ years of service

� Dow Jones Sustainability Index

� Traded on NYSE as DUK

� Stock dividends for 80+ years

� 5 states: North Carolina,

U.S. Franchised Electric and Gas

� 5 states: North Carolina, South Carolina, Indiana, Ohio and Kentucky

� 47,000 square miles of service area

� 28,000 MW of regulated generating capacity

Overview of Duke Energy and Regional Area

4

SERC Region

5

SERC Capacity Breakdown - 2008

6

Actual Peak Demand

7

Actual/Projected Peak Demand

8

Duke Energy is part of VACAR Subregion

VAP

VACAR South

PJM

9

Southern

TVA

VACAR South

Duke Energy Carolinas System Overview

Duke Energy Carolinas Balancing Authority

Winston-SalemGreensboro

Burlington

DurhamChapel Hill

Asheville

High Point

BELEWS CREEK

DAN RIVER

OXFORD

RHODHISSLOOKOUT

MARSHALL

LINCOLN

RIVERBENDCLIFFSIDE

COWANS FORD

TUXEDO

40

7485

40

77

85

40

BRIDGEWATER

MOUNTAIN ISLAND

Statesville

MooresvilleBUCK

SalisburyHickory

MorgantonLenoir

Walnut Cove

Eden

Shelby

Tennessee

North Carolina

Virginia

Tennessee

MCGUIRE

DILLSBORO

BRYSON

NANTAHALA

QUEENS CREEK

FRANKLIN

TUCKASEGEE

THORPE

CEDAR CLIFF

BEAR CREEK

DUKE POWER SERVICE AREA

11

Spartanburg

Gastonia

Rock HillGreenville

Anderson

Charlotte

BUZZARD ROOST

99 ISLANDS

MILLCREEK

WYLIE

GASTON SHOALS

CLIFFSIDE

FISHING CREEK

WATEREE

DEARBORN

CEDAR CREEK

BAD CREEK

JOCASSEE

KEOWEE

LEE

ALLEN

26

85

385

26

77

74

MOUNTAIN ISLAND

Lancaster

Greenwood

Clemson

BrevardShelby

GREAT FALLS

ROCKY CREEK

North Carolina Georgia

South Carolina

Georgia

OCONEE

CATAWBA

North Carolina

South Carolina

MISSION

NANTAHALA FRANKLIN THORPE

TENNESSEE CREEK

Generation – Fast Facts

� Duke Energy Carolinas Capacity

� Nuclear – 6,996 MW

� 7 units at 3 plants

� Fossil – 7722 MW

� 30 units at 8 plants

� Hydro – 3218 MW� Hydro – 3218 MW

� 95 units at 30 plants

� Combustion Turbine – 3266 MW

� 51 units at 8 plants

� Non-Duke Capacity

� Independent Power Producers (IPPs) – 1820 MW

� 11 units at 2 plants

� Southeast Power Administration (SEPA) – 51 MW

� Non-Utility Generators (NUGs) – 110 MW

Transmission - Fast Facts

� Estimated Transmission System� Approximately 13,000 miles of transmission lines (including Nantahala) operate on four major voltage levels – 500kV, 230kV, 100kV and 44kV

Voltage Miles Equipment Number

500 kV 580

230 kV 2,660

161 kV (Nantahala Area)

150

100 kV 6,550

66 kV 110

44 kV & below 3,000

Transmission Sites 200

Circuit Breakers 3,258

Transformers 832

Interconnections 24

NC Topology

14

Seasonal Temperatures

72

82

92

15

32

42

52

62

Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec

Low High

Winter Load

Summer Load

Distribution of Generation

Peak Load For Duke Energy

19

Monthly Peaks

20

Load

18000

20000

22000

All Time Summer Peak

10000

12000

14000

16000

12:00:01

12:38:15

1:17:29

1:56:23

2:34:54

3:13:10

3:50:18

4:28:29

5:06:14

5:43:30

6:20:49

6:58:06

7:35:11

8:13:26

8:50:27

9:28:13

10:06:05

10:43:48

11:20:57

11:58:32

12:35:32

1:12:58

1:50:01

2:27:59

3:06:33

3:44:24

4:23:28

5:00:52

5:38:13

6:17:09

6:54:45

7:32:44

8:12:00

8:50:09

9:28:14

10:07:04

10:45:28

11:23:41

Time

MWs

8/6/07 Load

8/7/07 Load

8/8/07 Load

Duke Energy Load Distribution

23.0 %

25.0 %

27.0 %

29.0 %

31.0 %

22

15.0 %

17.0 %

19.0 %

21.0 %

23.0 %

2001 2002 2003 2004 2005 2006 2007 2008

Commercial Loads Residential Loads. Industrial Loads Muni Loads

Rainfall and Drought

2.5

3

3.5

4

4.5

Inches

23

0

0.5

1

1.5

2

Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec

Inches

Months

Precipitation 2007

Storms

25

60.02

60.04

60.06

60.08

Frequency

January 20, 2009

At 12:24, approximately 3000 MWs showed up on the Eastern Interconnection

59.92

59.94

59.96

59.98

60

11:00:01

11:03:03

11:06:06

11:09:05

11:12:18

11:15:19

11:18:20

11:21:21

11:24:23

11:27:25

11:30:28

11:33:29

11:36:30

11:39:30

11:42:31

11:45:32

11:48:35

11:51:36

11:54:38

11:57:37

12:00:45

12:03:48

12:06:53

12:09:53

12:12:57

12:16:02

12:19:07

12:22:12

12:25:16

12:28:21

12:31:25

12:34:31

12:37:33

12:40:36

12:43:40

12:46:42

12:49:44

12:52:46

12:55:48

12:58:48

Frequency

Actual Frequency

10300

10400

10500

10600

10700

10800

10900

Superbowl XLIII

9800

9900

10000

10100

10200

10300

18:00:02

18:12:16

18:25:15

18:37:31

18:49:32

19:01:49

19:14:35

19:27:14

19:39:57

19:52:16

20:05:03

20:17:08

20:29:33

20:42:08

20:54:41

21:07:39

21:20:05

21:32:36

21:45:08

21:57:37

22:10:58

22:23:48

22:36:32

22:49:07

BA Load