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Preview of thePreview of theElectric Electric

Transmission Transmission Constraint StudyConstraint Study

Division of Market Division of Market DevelopmentDevelopment

Before the CommissionBefore the Commission

September 26, 2001September 26, 2001

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Members of the TeamMembers of the Team• Thanh Luong (Team

Lead)• Kumar Agarwal• Cynthia Pointer• Meesha Bond• Raymond Montini

• Ron Rattey• Camilla Ng• Dean Wight• William Meroney

(Advisor)

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ProductProduct

• A Western Infrastructure AssessmentA Western Infrastructure Assessment– Review of supply (generation), demand, market activity and transmissionReview of supply (generation), demand, market activity and transmission

Estimated Completion: To Be DeterminedEstimated Completion: To Be Determined

• A similar assessment of Eastern infrastructure is plannedA similar assessment of Eastern infrastructure is planned Estimated Completion: To Be DeterminedEstimated Completion: To Be Determined

Related ProductsRelated Products

•Transmission Constraint StudyTransmission Constraint StudyEstimated Completion: Estimated Completion: Nov. 07, 2001Nov. 07, 2001

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Why Constraints MatterWhy Constraints Matter• Constraints and the resulting Constraints and the resulting

congestion pose two problems for congestion pose two problems for Customers:Customers:

-Threatens reliability.Threatens reliability.

- Increases the costs of Increases the costs of power.power.

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has been the traditional criteria for relieving constraints, but . . .

Why Constraints MatterWhy Constraints Matter

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Why Constraints MatterWhy Constraints Matter

• Constraints increase the cost of power where supply can not move to where it is needed.

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Examples of ConstraintsExamples of Constraints

• Path 15 in Central CAPath 15 in Central CA

• Central East Interface in NYCentral East Interface in NY

Path 15Path 15 in Central CA in Central CA

Central East Central East Interface in NYInterface in NY

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Estimated Cost of ConstraintsEstimated Cost of Constraints

• Path 15 in Central CA:Path 15 in Central CA:- Congestion during Dec. 2000 Congestion during Dec. 2000

$73 million$73 million in additional cost to Customers in additional cost to Customers

• Central East Interface in NY:Central East Interface in NY:- Congestion during Aug. 2001 Congestion during Aug. 2001

$19 million$19 million in additional cost to Customers in additional cost to Customers

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In Review . . .In Review . . .

• A Western Infrastructure AssessmentA Western Infrastructure Assessment– Review of supply (generation), demand, market activity and transmissionReview of supply (generation), demand, market activity and transmission

Estimated Completion: To Be DeterminedEstimated Completion: To Be Determined

• A similar assessment of Eastern infrastructure is plannedA similar assessment of Eastern infrastructure is planned Estimated Completion: To Be DeterminedEstimated Completion: To Be Determined

•Transmission Constraint StudyTransmission Constraint StudyEstimated Completion: Estimated Completion: Nov. 07, 2001Nov. 07, 2001