Electric Transmission Overview

May 13, 2015

Tony Greve, Customer Services Engineer AEP Ohio

American Electric Power – Service TerritoryAmerican Electric Power – Service Territory

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AEP is Headquartered in Columbus, Ohio

AEP delivers electricity to more than 5.3 million customers across a 200,000 + square mile service territory.

American Electric Power - Major Businesses IncludeAmerican Electric Power - Major Businesses Include

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•Regulated Utility Operations– Seven regional electric utilities, serving customers in 11 states.

•Transmission– Strongest transmission network in the United States.

•Power Generation– One of the nation’s largest, most efficient, and most innovative generation

fleets.

•AEP Energy Partners– Providing electric supply to customers in deregulated electricity markets.

•River Operations– One of the nation’s largest barge companies, transporting coal and other

cargo.

American Electric Power – OverviewAmerican Electric Power – Overview

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AEP is one of the largest electric utilities in the United States

38,000 MW of generating capacity

39,000 miles of electric transmission lines

221,000 miles of electric distribution lines

AEP is the largest owner of electric transmission in the United States

AEP’s transmission system supplies approximately 10% of the demand in the Eastern Interconnection (the transmission system that serves 38 states and eastern Canada)

Has more 765 kV extra high voltage transmission lines than all other United States transmission systems combined ~2,100 miles.

Eleven states served: Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia, West Virginia

AEP has a 100+ year history of providing low-cost, reliable transmission service to customers, and is at the forefront of technology development in the transmission industry

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American Electric Power – Columbus Area TransmissionAmerican Electric Power – Columbus Area Transmission

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The 765 kV and 345 kV backbone network can delivery power from a multitude of sources across the PJM region. Lower-voltage lines (both overhead and underground) feed into the city from multiple substations around the area.

AEP’s transmission planning criteria requires additional safeguards for the reliability of major metropolitan areas (minimum N-2 reliability). As the largest city on the AEP system, the Columbus area can withstand multiple simultaneous outages on the transmission network with no loss of load.

In addition to 5-year and 15-year studies performed in coordination with PJM, AEP Transmission Operations perform forward-looking seasonal assessments (e.g., pre-summer) to prepare for forecasted system conditions.

Operating guidelines are developed for the upcoming season to provide guidance in managing the transmission system in anticipation of possible contingency outages.

Columbus is served by one of the most robust transmission systems in the U.S., operated as part of the PJM Regional Transmission

Organization (RTO).

AEP is investing over $1.5 billion in Ohio’s transmission and distribution infrastructure between 2014 and 2016.

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American Electric Power – Transmission Real Time OperationsAmerican Electric Power – Transmission Real Time Operations

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•AEP’s Transmission Operations Center (TOC) is located in the Columbus suburb of New Albany.

•Transmission dispatch and control is directed for AEP’s eleven state area directly from the TOC. The building is staffed by NERC-certified system control operators and dispatchers.

•In cooperation and coordination with PJM, AEP monitors and controls the transmission system on a real-time basis 24/7/365 via a robust Supervisory Control and Data Acquisition (SCADA) system, allowing for rapid load and system topology control.

•The TOC houses a state-of-the-art state estimator system that monitors real system information and uses this information to run nearly a thousand contingency outage cases every four minutes to prepare for any possible system conditions.

•Operators also perform “next day” analysis to anticipate and plan for system conditions the following day.

•Operations Engineering is staffed on a 24/7 “on-call” basis to assist with real-time response to outages.

Transmission Operations Center – New Albany, OH

The LEED certified building is built to withstand an F4 tornado and has redundant systems and dual

infrastructure backbone networks.

Regional Transmission Organization MapRegional Transmission Organization Map

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PJM MapPJM Map

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PJM is a regional transmission organization (RTO) that coordinates the movement of wholesale electricity in all or parts of 13 states and the District of Columbia.

American Electric Power – Generation RetirementsAmerican Electric Power – Generation Retirements

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Over 16 GW of generation retirements recently announced in the near-term 7 GW retiring in the state of Ohio alone AEP will retire nearly 6,600 megawatts of coal-fueled generating capacity in 2015 and 2016 due to environmental regulations and market

conditions, and will increase its use of natural gas, renewables and energy efficiency resources. as part of this mass retirement.

American Electric Power – Generation RetirementsAmerican Electric Power – Generation Retirements

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Over 16 GW of generation retirements recently announced in the near-term 7 GW retiring in the state of Ohio alone AEP will retire nearly 6,600 megawatts of coal-fueled generating capacity in 2015 and 2016 due to environmental regulations and market

conditions, and will increase its use of natural gas, renewables and energy efficiency resources. as part of this mass retirement.

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American Electric Power – Ohio Transmission ProjectsAmerican Electric Power – Ohio Transmission Projects

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1. Vassell2. East Lima3. North Baltimore4. East Amsterdam - Miller SW5. Yager 6. Nottingham *7. Muskingum - Natrium8. Holloway9. Marietta *10. Biers Run 11. Battelle *12. Tidd – Sunnyside, Asset Renewal * These project are T&D Reliability Projects.

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Project Driver Cost In-Service Date

Vassell Station

New 765/345-kV station in Columbus District; additional 138-kV line into Delaware.

System

Improvement

$ 212

million2014

East Lima Station

Add new 345 kV circuit breaker string with three (3) - 345 kV circuit breakers and switch

position of Transformer #1 with the Southwest Lima 345 kV line.

Baseline

reliability$ 5 million 2016

North Baltimore Area Improvements

Rebuild approximately 21 miles of old 34.5 kV transmission line and covert to 69 kV

operation.

System

Improvement

$ 30

million2018

East Amsterdam – Miller Switch

Rebuild 10 miles of 69 kV line for future operation at 138 kV to serve shale customer

increased electrical demand.

Baseline

reliability

$ 31

million2015

Yager

Install a 200 MVA, 138/69-kV transformer, tie to two ATSI 138 kV lines, construct/rebuild

~15 miles of 138 kV line to support shale customer expansions.

Baseline

reliability

$ 70

million2016

Nottingham (T&D Reliability, plus)

Create 138 kV switch station to tie to six ATSI 138 kV lines, and construct ~5 miles of

138 kV line to customer capacity

Baseline

reliability

$ 64

million2016

Muskingum - Natrium

Sag study and reconductor the 55 mile double circuit 138 kV line. Line will support

customer expansions.

Baseline

reliability

$ 57

million2017

HollowayInstall 345/138 kV station to “repower” six ATSI 138 kV lines near the retired Burger Power Plant.

Baseline

reliability 

$ 51

million2015

Marietta System (T&D Reliability, plus)

Install a 138 kV and 69-kV area network (~65 net miles) to retire 23-kV sub-distribution

system.

System

Improvement

$ 110

million2017 - 2022

Biers Run StationConstruct new 345/138/69 kV station at Biers Run with outlets to Circleville and Delano; two 69-kV outlets to Ross-Highland 69-kV line; replace various D transformer banks.

Baseline

reliability

 

$ 100

million2017

Battelle (T&D Reliability, plus)

Provide Battelle with 69 kV service by end of 2015 as the next step in providing them

two way transmission service.

Customer &

Reliability

$ 12

million2016

Tidd – Sunnyside, Asset Renewal

Rebuild 55 miles of old/low capacity 138 kV line, six wired, with 1234 ACSS, support two

future 138 kV circuits & load growth.

Asset Renewal

$ 120

million

 

2016

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American Electric Power – Vassell StationAmerican Electric Power – Vassell Station

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Construct Vassell Station, a new 765/345/138 kV Station near Sunbury, Ohio.

•Tap the Kammer – Maliszewski 765 kV circuit and Hyatt – Corridor 345 kV circuit, Add a second circuit from Vassell to Corridor

•Add 138 kV circuit from Vassell to Delaware

•Add St. Clair 138 kV SVS System

In-Service/Energized Date: 10/31/14, remainder in 2015.

Project Cost: $212 Million.

765 kV Yard

345/138 kV Yard

American Electric Power – Transmission line milesAmerican Electric Power – Transmission line miles

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State/Voltage 765 500 345 230 161 138 115 SubTotal 88 69 46 40 SubTotal 34.5 23 TotalArkansas     78   305 235 26 644   444     1,088     1,088Indiana I&M 600   1,383     1,429   3,412   406     3,818 541   4,359Transco - Indiana           3   3   11     14 1   15Indiana 600 0 1,383 0 0 1,432 0 3,415 0 417 0 0 3,832 542 0 4,374Kentucky 257   8   48 339   652   429 166   1,247 3   1,250Louisiana     105     282 1 388   328     716     716Michigan - I&M 16   234     232   482   281     763 136   899Transco - Michigan               0   15     15     15Michigan 16 0 234 0 0 232 0 482   296     778 136   914Ohio OPC 507   1,415     3,230   5,152   2,352   58 7,562 417 77 8,056Transco - OH 1   1     54   56   88   3 147 6 8 161Ohio Total 508 0 1,416 0 0 3,284 0 5,208 0 2,440 0 61 7,709 423 85 8,217Oklahoma PSO     591 34 8 2,064 10 2,708   647     3,355     3,355Transco - OK           125   125   131     256     256Oklahoma SEP     59     38   97         97     97Oklahoma Total 0 0 650 34 8 2,227 10 2,930 0 778 0 0 3,708 0 0 3,708Tennessee APC       91   110   201   2     203     203Tennessee KGP           44   44         44 29   73Tennessee Total 0 0 0 91 0 154 0 245 0 2 0 0 247 29 0 276Texas TCC     630     2,446   3,076   1,216     4,292     4,292Texas PSO     17     12   29         29     29Texas SEP     493     887 15 1,395   801     2,196     2,196ETT     997     345   1,342   186     1,528     1,528Texas TNC     224     1,423 1,647   2,445     4,092     4,092Texas Total 0 0 2,361 0 0 5,113 15 7,489 0 4,648 0 0 12,137 0 0 12,137Virginia 349 96 69 15   1,560   2,089   630 48   2,767 98   2,865Transco - WV           0   0         0     0West Virginia OPC           41   41         41     41West Virginia APC 384 1 310     1,179   1,874 37 349 696   2,956 57   3,013West Virginia WPC   16 15     192   223   84     307     307W. Virginia Total 384 17 325 0 0 1,412 0 2,138 37 433 696 0 3,304 57 0 3,361

Voltage Totals 2,114 113 6,629 140 361 16,270 52 25,681 37 10,845 910 61 37,534 1,288 85 38,907

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American Electric Power – Aging infrastructureAmerican Electric Power – Aging infrastructure

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Replacement of 25% of U.S. transmission facilities after 50, 60, 70, and 80-year lives

Source: The Brattle Group, September 2013

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United States Transmission GridUnited States Transmission Grid

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