Table 520 Detailed Congestion-Relief System Components and Their Assumed Costs for Scenarios 1, 2, 3, and 6 Scenario 6 Scenario 1 Scenario 2 Scenario 3 RPSs + Geodiverse RPSs + Gas ISO Queue Renewables Plus Renewables Congestion-Relief System 1,471 MW 9,043 MW 1,839 MW 3,596 MW (2 HVDC Ties) (8 HVDC Ties) (2 HVDC Ties) (3 HVDC Ties) Total $ Total $ Total $ $ Equipment $ per unit Quantities Quantities Quantities Quantities (Billions) (Billions) (billions) (Billions) DC portion (5 × 400) + (2 × 400) + $3.5 million/ 2 × 200 = 2 × 200 = (3 × 300) = ( 1 × 300) = HVDC overhead lines $1.40 $10.15 $1.40 $3.85 mi 400 mi. 400 mi. 2,900 mi. 1,100 mi. $300 million/ Converters 4 $1.20 16 $4.80 4 $1.20 6 $1.80 converter Misc. DC additional $200 million/tie 2 $0.40 8 $1.60 2 $0.40 3 $0.60 equipment Total DC portion $3.00 $16.55 $3.00 $6.25 AC portion Approx. 1/3 × Approx. 1/3 × (included in (included in Sending end— $0.25 9,000 = 3,600 = integrator -- $0.75 integrator -- $0.30 reactive devices million/MVAR system) system) 3,000 MVAR 1,200 MVAR $10 million/ terminal expansion Sending end— (assumed two 2 x 2 = 4 $0.04 -- -- 2 x 2 = 4 $0.04 -- -- AC terminations terminal expansions per tie) 3 8 (to connect (included in (included in (to connect POI Sending end— $40 million/AC POI to integrator -- $0.32 integrator -- $0.12 to converter substation New AC substations converter system) system) station at each station at each tie) tie)
Table 520 Detailed Congestion-Relief System Components and Their Assumed Costs for Scenarios 1, 2, 3, and 6 Congestion-Relief System Scenario 1 RPSs + Gas Scenario 2 ISO Queue Scenario 3 Renewables Plus Scenario 6 RPSs + Geodiverse Renewables 1,471 MW (2 HVDC Ties) 9,043 MW (8 HVDC Ties) 1,839 MW (2 HVDC Ties) 3,596 MW (3 HVDC Ties) Equipment $ per unit Quantities Total $ (Billions) Quantities Total $ (Billions) Quantities Total $ (billions) Quantities $ (Billions) DC portion HVDC overhead lines $3.5 million/ mi 2 × 200 = 400 mi. $1.40 (5 × 400) + (3 × 300) = 2,900 mi. $10.15 2 × 200 = 400 mi. $1.40 (2 × 400) + ( 1 × 300) = 1,100 mi. $3.85 Converters $300 million/ converter 4 $1.20 16 $4.80 4 $1.20 6 $1.80 Misc. DC additional equipment $200 million/tie 2 $0.40 8 $1.60 2 $0.40 3 $0.60 Total DC portion $3.00 $16.55 $3.00 $6.25 AC portion Sending end— reactive devices $0.25 million/MVAR (included in integrator system) -- Approx. 1/3 × 9,000 = 3,000 MVAR $0.75 (included in integrator system) -- Approx. 1/3 × 3,600 = 1,200 MVAR $0.30 Sending end— AC terminations $10 million/ terminal expansion (assumed two terminal expansions per tie) 2 x 2 = 4 $0.04 -- -- 2 x 2 = 4 $0.04 -- -- Sending end— New AC substations $40 million/AC substation (included in integrator system) -- 8 (to connect POI to converter station at each tie) $0.32 (included in integrator system) -- 3 (to connect POI to converter station at each tie) $0.12
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