Oncor Transmission Service Provider

Oncor Transmission Service Provider

Kenneth A. DonohooDirector – System Planning, Distribution and TransmissionOncor Electric Delivery Co [email protected]

ERCOT LTSA MeetingAustin, TXJanuary 23, 2014

01/23/20141 Ken Donohoo - ERCOT LTSA Meeting

Texas' largest regulated transmission and distribution utility - 6th largest in the U.S.

Our 3,700 employees serve 10 million people - about a third of the state of Texas.

Generators Transmission & Distribution

RegulatedCompetitive

Retail Electric Providers (REP)

Competitive

Generators Transmission & Distribution

RegulatedCompetitive

Retail Electric Providers (REP)

Competitive

Oncor: Who We Are


Oncor Advanced Technologies: Paving the Way for Reliable System

Dynamic Line Rating allows utilities to bring the maximum amount of power safely over the wires. Oncor's grid dispatch organization has been using six regional weather forecasts for daily transmission line ratings and can move to hourly ratings of critical corridors (DOE support)

Dynamic reactive devices (SVC or STATCOM) at station(s) quickly controls voltage under changing conditions, normal and contingency

Syncophasor monitoring systems take very detailed measurements 30 times a second, rather than an average measurement every 3 to 4 seconds, and communicate these to operations centers (DOE support through smart grid demonstration grants)


OUR SYSTEM BY THE NUMBERS

7+ Million Texas Consumers

3+ Million Delivery Points to Homes and Businesses

24,000 MW Peak Delivered

6,300 Transmission Circuit Breakers

983 Stations

1,588 Power Transformers

172 Autotransformers

15,300 Miles of Transmission Lines

103,000 Miles of Distribution Lines

3,118 Distribution Feeders


OUR SYSTEM BY THE NUMBERS (continued)

428 Total Points of Interconnection283 Rural Electric Cooperatives140 Other Electric Utilities

5 Municipal Utilities

36,400 MW of Generation Interconnections20,247 MW Gas

28 Plants, 113 units9,451 MW Coal

7 Plants, 13 units4,085 MW Wind

28 Plants, 2,620 units2,407 MW Nuclear70 MW Hydro

150 MW Wood

185 Generation Interconnection Requests Received81,160 MW of Generation Represented68 Interconnect Agreements Signed


CREZ & West Texas Improvements

Facilitating Growth in Texas• Texas’ population has grown 21 percent to more than

25 million over the last 10 years

Energy Diversification• Expanding generation sitting options to help the state

meet growing energy demand• CREZ lines are generation “agnostic” (i.e., not “wind-

only”)

Economic Benefits• Reduce transmission congestion and increase grid

reliability• Generate more than $2 billion in state and local tax

revenues

Environmental Benefits• Reduce greenhouse and ozone-causing emissions by

more than 13 percent• Save ~17 billion gallons of water each year


LONG TERM PLANNING CONCEPTS

Customer Expectations/Interest/Communications Increasing

Compliance and Oversight Increasing

Generation Locating Away from Load Centers

Renewable, Distributed Generation and Demand/Load Response Increasing

System Inertia (Large Units) Lower (frequency control)

System Strength Weaker (fault duty, short circuit ratio)

Dynamic and Transient Stability Limiting Transfer Capability More Than Static Limits

Oscillations and Control Interactions Increasing Concern

Load and Peak Demand Projections Highly Variable Based Upon Many Factors

System Operational Control and Coordination Very Complex


LONG TERM PLANNING CONCEPTS

System Security and Flexibility Needed for Events Changing Conditions

HILF Events, CIP and Physical Security Concerns

Outages, Clearances and System Restoration Considered

Changing Load Types (Lighting - Incandescent to CFL to LED)

Models to Support Good Decisions

Power Electronics Enabling Transmission Control/Redispatch (Voltage Source Converter) Increase Utilization of Existing System

Redevelopment of Generation Sites


Oncor Transmission Service Provider

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