Industry Restructuring

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Technological innovations

Customer's demand for choice and value

Favorable view of markets






        Alternative Industry Structures



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                       Independent System Operator (ISO)

*    Provides transmission services on a non-discriminatory basis

*    Maintains reliability/Arranges for ancillary services

*    Prices transmission/Resolves congestion



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          Alternative Structures for

        Transmission--Vertical Utility

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                 System
                 Operator

           Ancillary    Tansmission
           Services     Facility
           Providers    Provider(s)




             Alternative Structures for
             Transmission--NGC Model

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                Power
                Exchange

                Ancillary Services Provider
                Transmission Facility Provider(s)

                System Operator
                Transmission Provider(s)








          Alternative Structures for
         Transmission--Australian Model

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            System Operator
            Providers

            Power Exchange
            Ancillary Services Provider
            System Operator
            Transmission Facility Provider(s)








           Alternative Structures for
           Transmission--PJM MNodel

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                 Power Exchange

                 Ancillary Services Providers

                 Systems Operator

                 Scheduling Coordinators for Direct Access Customers

                 Transmission Facility Provider(s)






          Alternative Structures for
          Transmission--TRANSCO

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             Exchange

          Power

             System Operator

             Transmission Facility Provider(s)
             Scheduling Coordinators
             Ancillary Service Providers





       Alternative Structures for
       Transmissionm-WEPEX


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Power Exchange

System Operator

Ancillary Services Providers

Scheduling Coordinators for Direct Access Customers

Transmission Facility Providers



Alternative Structures for Transmission --FERC Model

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Scheduling Coordinators

Transmission Facility

Provider(s)

System Operator

Ancillary Services Providers










Common types of Transmission Services

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         FERC Ancillary Services


   Scheduling,
   System Control
   & Dispatch