ENTSOG Tariff NC - Implementation Document 2nd Edition

How to calculate reserve prices for firm non-yearly standard capacity products with seasonal factors Reserve prices for non-yearly products may be calculated using seasonal factors applied on top of the designated multiplier. The mathematical formula for non-year- ly reserve prices with seasonal factors is similar to the previous formulas, including the seasonal factor (sf), as set out below: For quarterly, monthly and daily firm standard capacity products, the formulas for calculating reserve prices are:

P st

= (m i

× sf i

) × (p y

/ 365) × d

where: sf i

is the seasonal factor corresponding to the given quarter, month or day ( s fQ , s fM or s fD )

For leap years, P st

= (m i

× sf i

) × (p y

/ 366) × d .

For within-day firm standard capacity products, the formula for calculating reserve prices is:

P st

= (m WD

× sf WD

) × (p y

/ 8760) × h

where: sf WD

is the seasonal factor corresponding to the period of the year in which the within-day product is booked

For leap years, P st

= (m WD

× sf WD

) × (p y

/ 8784) × h .

For further details, please also see Annex K – example of calculating reserve prices for non-yearly firm capacity products with seasonal factors.

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TAR NC Implementation Document – Second Edition September 2017