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TAR NC Implementation Document – Second Edition September 2017
ARTICLE 13 LEVEL OF MULTIPLIERS AND
SEASONAL FACTORS
Responsibility: subject to consultation per Article 28(1) by NRA; subject to
decision by NRA
General
The level of multipliers must fall within the ranges, 1–1.5 for quarterly and monthly
products and 1–3 for daily and within-day products, as shown in Figure 22. Where
seasonal factors are applied, the arithmetic mean of the multiplier for the applicable
standard capacity product and the relevant seasonal factors (M x SF) must be within
the same range as shown in Figure 22, over the gas year. Where the resulting value
is outside the range a correction factor should be applied in order to bring the value
within the required range applicable to the relevant standard capacity product. For
quarterly and monthly products the correction factor is calculated by dividing the
resulting value above the range by 1.5, and where the resulting value is below the
range, 1 should be divided by this value. For daily and within-day products the
values 3 and 1 should be used.
For an example in calculating the seasonal factors and applying the correction factor
to the value derived from multiplying the seasonal factor and multiplier, please see
Annex M – example of calculating seasonal factors.
Below are sections dedicated to Articles 14 and 15, explaining how to calculate
reserve prices without and with seasonal factors.
duly justified cases
duly justified cases
duly justified cases
daily & within-day
daily & within-day
quarterly & monthly
quarterly & monthly
Pre April 2023
Post April 2023
0
0
1
1
3
?
1.5
1.5
Figure 22:
Level of multipliers and seasonal factors