APPENDIX 8 TO TSC 2013-1 (MODEL 20-11-2012)
GASUNIE TRANSPORT SERVICES
FLEXIBILITY SERVICES – Nomflex (penalty component)
1.
Financial consequences in accordance to article 2.3 of the gas conditions in case of a volume
overshoot or volume undershoot, to be paid by shipper to GTS
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A volume overshoot for shipper s occurs when shipper’s actual storage volume exceeds the
maximum contractual volume (refers to “bufferruimte” as stated in art. 2.3 of the gas
conditions).
A volume undershoot for shipper s occurs when shipper’s actual storage volume is below
zero.
When the accumulated overshoot or undershoot leads to a volume overshoot or volume
undershoot for the flexibility suppliers, the suppliers will charge two kind of contractual
penalties to GTS, the excess usage penalty (EUP) and the mark to market
compensation(MtM). For information purposes in part 2 of this appendix these penalties are
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explained.
The contractual penalties GTS has to pay to the suppliers of the flexibility service are part of
the financial consequences as stated in article 2.3 of the gas conditions.
The following formula is used to calculate the EUP-charge per shipper.
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EUPtotal =  EUP for all suppliers of the flexibility services, for a month
Os = the accumulated volume overshoot + the accumulated volume undershoot
for shipper s for the same month
Ototal =  Os for all shippers
CEUP,s = EUP-charge for shipper s for the month.
CEUP,s = EUPtotal x Os / Ototal
The following formula is used to calculate the MtM-charge per shipper.
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MtMtotal =  MtM for all suppliers of the flexibility services for an hour
Os = the volume overshoot or the volume undershoot for shipper s on the same hour
Ototal =  Os for all shippers
CMtM,s = MtM-charge for shipper s on that hour
CMtM,s = MtMtotal x Os / Ototal
The MtM-charges will be totaled per shipper and invoiced once a month.
Release 1, 20-11-2012
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APPENDIX 8 TO TSC 2013-1 (MODEL 20-11-2012)
GASUNIE TRANSPORT SERVICES
FOR INFORMATION PURPOSES ONLY !
2.
Information about contract between GTS and suppliers of flexibility services
GTS has concluded different contracts with suppliers to be able to deliver flexibility services to the
market (shippers). In these contracts between GTS and suppliers volume limits and penalties
(when exceeding these limits) have been concluded.
The following penalty is applicable in every contract between GTS and a supplier of flexibility
services:
Where GTS has exceeded the total contracted storage volume (storage volume < zero or storage
volume > total contract storage volume) in one or more hours of a specific gas day, the following
“contractual exceeding penalty” shall be chargeable by supplier to GTS:
The “contractual exceeding penalty” = excess usage penalty + mark to market compensation
The two components of the “contractual exceeding penalty” are defined as follows:
I.
excess usage penalty = volume exposure x price penalty
the volume exposure: the absolute gas volume in kWh determined for a gas day that
is equal to the cumulative hourly storage volume overshoot (when actual storage
volume > contracted storage volume) plus the cumulative hourly storage volume
undershoot (when actual storage volume < zero) for all hours that the overshoot or
undershoot occurs in that gas day;
the price penalty: 20% of the neutral gas price of the gas day in which the volume
exposure occurs.
This excess usage penalty is chargeable for a maximum of 24 consecutive hours;
therefore this period may be spread over two gas days. If the cumulative hourly storage
volume overshoot plus the cumulative hourly storage volume undershoot occurs for more
than 24 consecutive hours, the excess usage penalty shall be reduced accordingly.
II.
mark to market compensation = volume exposure x price exposure x percentage mtmc
The mark to market compensation is only chargeable for the hours that an overshoot or
undershoot of the total contracted storage volume occurs and the bid price ladder is
called. When these conditions are not met, the mark to market compensation is zero.
The volume exposure: as defined above.
The price exposure: a gas price in €/kWh that equals the highest absolute difference
between the bid price ladder price called for on that gas day and the neutral gas price
for that gas day.
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Percentage mtmc: 100% when an undershoot or overshoot occurs for one
single hour; 50% when an overshoot or undershoot occurs for the following
two to four consecutive hours; and 20% when an overshoot or undershoot
occurs for the following five or more consecutive hours. This period may be
spread over more than one gas day.
Release 1, 20-11-2012
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