ENTSOG Tariff NC - Implementation Document 2nd Edition

Reserve Prices for Firm Capacity Products

ARTICLE 14 CALCULATION OF RESERVE PRICES

Responsibility: the level of calculated reserve prices is subject to consultation per Article 28(1) by NRA; subject to decision by NRA

General The TAR NC provides general formulas for reserve prices for non-yearly products without seasonal factors. The formulas distinguish between within-day and non- within-day products. Non-within-day products must have reserve prices based on the number of days in the product, while within-day products must have reserve prices based on the number of hours. How to calculate reserve prices for firm non-yearly standard capacity products without seasonal factors For quarterly, monthly and daily firm standard capacity products, the formulas for calculating reserve prices are: where: i represents the non-yearly product: quarterly, monthly or daily capacity product, P st is price of a short-term product of a duration of ‘d’ days, m i is the multiplier corresponding to the standard product ( m Q , m m or m D ), p y is price of yearly product, d is duration of short-term product in days, For leap years, P st = m i × (p y  / 366) × d P st = m i × (p y / 365) × d

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

P st

= m WD

× (p y  / 8760) × h

where: P st is price of a short-term product of a duration of ‘h’ hours, m WD is the multiplier corresponding to within-day products, p y is price of yearly product, h is duration in remaining hours of the gas day For leap years, P st = m WD × (p y / 8784) × h

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TAR NC Implementation Document – Second Edition September 2017