ENTSOG Tariff NC - Implementation Document 2nd Edition

DERIVATION OF POST-ADJUSTMENT TARIFFS

The full table with CWD tariffs at entry points , before and after the adjustment for storage discounts, is presented below. Pre-adjustment entry tariffs and entry revenues: column T En defines pre-adjust- ment entry tariffs. Column R En indicates pre-adjustment total revenues collected at each entry point with the CWD counterfactual. The TSO collects € 500 at entry points. Post-adjustment entry tariffs and entry revenues: for entry points from storage facilities, a tariff discount is applied, as per Article 9(1). For simplicity, one assumes that the discount at entry points from storage facilities is 50%. This implies that pre-adjustment tariffs are divided by 2 for entry points from storages only (cf. TEn_adjusted column). Without any correction, the TSO would under-recover its allowed revenue at entry points of 500€ (cf. RE n_adjusted column). Therefore, adjusted tariffs are rescaled upwards by a multiplicative factor of 500/496.67 (storage points are also rescaled as per Article 6(4)). Final entry tariffs ( TE n_final ) and final entry revenues ( RE n_final ) are then calculated. One of the advan- tages of this multiplicative rescaling factor, compared to an additive rescaling factor, is that there is no change in the relative tariffs charged at entry points.

TARIFF TABLE AT ENTRY POINTS

Storage adjustment at entry points

R En_final

R En_adjusted

T En_final

T En

Storage? T En_adjusted

R SumEn

R En

Entry points W cen

A

0.8% 500

4.13 1.0319 yes

0.5159

2.0637 0.5194 2.0776

B

20.0%

99.81 1.4677 no

1.4677 99.8054 1.4776 100.4753

C

0.5%

2.54 0.6351 yes

0.3176

1.2702 0.3197 1.2788

D

0.7%

3.52 0.8800 no

0.8800

3.5199 0.8859 3.5436

E

1.5%

7.67 1.2778 no

1.2778

7.6668 1.2864 7.7182

F

10.3%

51.48 1.7159 no

1.7159 51.4760 1.7274 51.8215

G

4.2%

20.79 1.0394 no

1.0394 20.7879 1.0464 20.9275

I

0.9%

4.56 1.5203 no

1.5203

4.5610 1.5305 4.5916

J

2.7%

13.34 1.6670 no

1.6670 13.3361 1.6782 13.4257

K

21.3%

106.29 1.7714 no

1.7714 106.2852 1.7833 106.9987

L

10.6%

53.12 1.7708 no

1.7708 53.1244 1.7827 53.4810

M

24.9%

124.47 1.5559 no

1.5559 124.4740 1.5664 125.3095

Q

1.7%

8.30 0.4148 no

0.4148

8.2953 0.4175 8.3510

100%

500.00

496.67

500.00

Table 38: Tariff table at entry points

The full table with CWD tariffs at exit points , before and after the adjustment for storage discounts, is presented below. Pre-adjustment exit tariffs and exit revenues: column TE x defines pre-adjustment exit tariffs. Column RE x indicates pre-adjustment total revenues collected at each exit point with the CWD counterfactual. The TSO collects 500€ at exit points.

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