Feasibility Study For XXXX NW Stave River Project (A082)

Feasibility Study for NW Stave River Project (A082) Feb 20093.0 Study AssumptionsA number of assumptions have been made for purposes of conducting this feasibility study. First,BCTC relied upon the information provided by the IC in its Interconnection Request. Additionalstudy assumptions are provided in Appendix B.4.0 Study Results and Required UpgradesThe power flow analysis indicates that the proposed new generation in NW Stave River will notresult in BCTC equipment or lines exceeding design ratings.The short-circuit study concluded that the increase in the fault levels due to the integration of theNW Stave River project will not bring the short-circuit currents beyond the ratings of BCTCequipment.Protection for the IC’s line at UHT 360 kV Substation is existing and adequate. Therefore, notelecom or SCADA work will be required at UHT. However, the additional generation has to beintegrated into the existing SCADA system at NW Stave River facilities and as such updating ofthe data bases and displays at the BCTC Fraser Valley Office control center is required.5.0 Cost Estimate and Project ScheduleTable 2 lists the facilities required for system upgrades to interconnect the proposed project tothe BCTC transmission system. It also provides a non-binding good faith cost estimate for theinterconnection costs.For the Feasibility Study, it is not possible to allocate the estimated interconnection costsbetween Network Upgrades (NU) and Transmission Provider Interconnection Facilities(TPIF). However, BCTC notes that Transmission Provider Interconnection Facilities aretypically limited to a single span of transmission line entering the substation from the substationboundary.Table 2: Cost Estimate for the Required System UpgradesWork DefinitionFacilitiesPlanning and Operation UpdateMinorEstimated Interconnection Cost (2009 dollars):EstimatedCost$ 34 kPage 2 of 6 SPPA2009 – 69