SASKPOWER OPEN ACCESS TRANSMISSION TARIFF

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SASKPOWER OPEN ACCESS TRANSMISSION TARIFF3 Ancillary ServicesAncillary Services are needed with transmission service to maintain reliability within andamong the Control Areas affected by the transmission service. The Transmission Provideris required to provide and the Transmission Customer is required to purchase, thefollowing Ancillary Services: (i) Scheduling, System Control and Dispatch, and (ii)Reactive Supply and Voltage Control from Generation Sources.The Transmission Provider is required to offer to provide the following AncillaryServices only to the Transmission Customer serving load within the TransmissionProvider's Control Area: (i) Regulation and Frequency Response; (ii) Energy Imbalance;(iii) Operating Reserve – Spinning; and (iv) Operating Reserve - Supplemental. TheTransmission Customer serving load within the Transmission Provider's Control Area isrequired to acquire these Ancillary Services, whether from the Transmission Provider,from a third party, or by self-supply.The Transmission Customer may not decline the Transmission Provider's offer ofAncillary Services unless it demonstrates that it has acquired the Ancillary Services fromanother source. The Transmission Customer must list in its Application which AncillaryServices it will purchase from the Transmission Provider.The Transmission Provider shall specify in the applicable Rate Schedules the ratetreatment and all related terms and conditions in the event of an unauthorized use ofAncillary Services by the Transmission Customer.The specific Ancillary Services, prices and/or compensation methods are described on theSchedules that are attached to and made a part of the Tariff. Three principal requirementsPage | 13
SASKPOWER OPEN ACCESS TRANSMISSION TARIFFapply to discounts for Ancillary Services provided by the Transmission Provider inconjunction with its provision of transmission service as follows: (i) any offer of adiscount made by the Transmission Provider must be announced to all Eligible Customerssolely by posting on the OASIS; (ii) any customer-initiated requests for discounts(including requests for use by one’s wholesale merchant or an affiliate’s use) must occursolely by posting on the OASIS; and (iii) once a discount is negotiated, details must beimmediately posted on the OASIS. A discount agreed upon for an Ancillary Service mustbe offered for the same period to all Eligible Customers on the Transmission Provider’ssystem. Sections 3.1 through 3.6 below list the six Ancillary Services.3.1 Scheduling, System Control and Dispatch Service:The rates and/or methodology are described in Schedule 1.3.2 Reactive Supply and Voltage Control from Generation Sources Service:The rates and/or methodology are described in Schedule 2.3.3 Regulation and Frequency Response Service:Where applicable the rates and/or methodology are described in Schedule 3.3.4 Energy Imbalance Service:Where applicable the rates and/or methodology are described in Schedule 4.3.5 Operating Reserve - Spinning Reserve Service:Where applicable the rates and/or methodology are described in Schedule 5.3.6 Operating Reserve - Supplemental Reserve Service:Where applicable the rates and/or methodology are described in Schedule 6.Page | 14
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SASKPOWER OPEN ACCESS TRANSMISSION TARIFF

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