Glossary

Capacities

Maximum technical capacity
Theoretical maximum physical quantity of natural gas that can be carried at one contractual point of the network during one gasday. It does not take into account particular conditions such as maintenance, very low or high temperature... Such capacity does not refer to firm and/or interruptible capacity.

Profile of firm capacity
Capacity that can be offered to the networkusers, taking account of system integrity and the operational requirements of the transmission network.

Contracted firm annual capacity
Part of the firm technical capacity contracted by the network users for an annual or a gas season period.

Contracted firm monthly capacity
Part of the firm technical capacity contracted by the network users for a period of one month.

Contracted firm intermediary capacity
Part of the firm technical capacity contracted by the network users for a period of at least 10 consecutive days.

Available firm capacity
Part of the technical firm capacity that is not allocated as monthly or annual capacity.

Contracted interruptible capacity
Part of the maximum technical capacity that may be interrupted in accordance with the conditions stipulated in the transmission contract and which has been contracted by the network users.

Available interruptible capacity
Part of the maximum technical capacity that may be interrupted in accordance with the conditions stipulated in the transmission contract and which has not been contracted by the network users.

Contracted daily capacity
Part of the available daily capacity contracted by the network users through the SAJ service folowing the "first come first served" rule.

Contracted daily capacity via auction
Part of the available daily capacity not contracted by the network users through the SAJ service but contracted via auctions.

Available daily capacity
Daily capacity which is still available for booking.

Contracted within-day capacity
Part of the daily capacity not contracted by the network users on day-ahead auctions but contracted on within-day auctions.

UBI capacity obtained beyond rights
Sum of the capacities acquired by shippers through the "Use It Or Buy It" system beyond their total contracted capacity.

UIOLI available capacity
Capacity contracted by shippers that has not been used.

Firm delivery capacity contracted - industrials excepted SFM :
Sum by balancing zone of the firm delivery capacities contracted for the supply of industrial sites (excluding HMS).

Firm delivery capacity contracted - SFM :
Sum by balancing zone of the firm delivery capacities contracted for the supply of very high modulated sites.

Interruptible delivery capacity contracted - industrials excepted SFM :
Sum by balancing zone of the interruptible delivery capacities contracted for the supply of industrial sites (excluding HMS).

Interruptible delivery capacity contracted - SFM :
Sum by balancing zone of the interruptible delivery capacities contracted for the supply of very high modulated sites.

Flows

Maximum technical capacity
Theoretical maximum physical quantity of natural gas that can be carried at one contractual point of the network during one gasday. It does not take into account particular conditions such as maintenance, very low or high temperature... Such capacity does not refer to firm and/or interruptible capacity.

Effective technical capacity
Theoretical maximum physical quantity of natural gas that can be carried at one contractual point on the network during one gasday. This value takes into account particular conditions such as maintenance, low temperature... Such capacity does not refer to firm and/or interruptible capacity.

Profile of firm capacity
Capacity that can be offered to the networkusers, taking account of system integrity and the operational requirements of the transmission network.

Total contracted firm capacity
Sum of the contracted firm annual capacity, the contracted firm quarterly capacity, the contracted firm monthly capacity, the contracted firm intermediary capacity, the contracted daily capacity and the contracted within-day capacity.

Contracted interruptible capacity
Part of the maximum technical capacity that may be interrupted in accordance with the conditions stipulated in the transmission contract and which has been contracted by the network users.

Shippers' allocations
Sum of the quantities allocated to the shippers taking into account, when necessary, the result of the matching process with the adjacent operators.

Shippers' nominations
For a given nomination cycle, the sum of the nomination requests of the shippers on one interconnection point.

Physical measurement
Quantity of natural gas measured in energy that has transited through the network at one point.

GCV
Gross calorific value of the natural gas transited.

Wobbe Index
Ratio between the GCV of the gas and the square root of its density

Consumptions

Total consumption
Consumption measured on GRTgaz network at all delivery points.

Consumption of industrial sites (except SFM)
Consumption measured at all delivery points connected to industrial sites expected the very high modulated sites plus consumption measured at all delivery points connected to regional network.

Consumption of very high modulated industrial sites
Consumption measured at all delivery points connected to very high modulated industrial sites (i.e CCGT).

Consumption on public network
Consumption measured at all delivery points connected to public distribution network.

Consumption of very high modulated industrial sites
Consumption measured at all delivery points connected to very high modulated industrial sites (i.e CCGT).

Consumption on regional network
Consumption measured at all delivery points connected to regional network.

GRTgaz' forecast of consumption
GRTgaz' forecast of consumption.

GRTgaz' forecast of consumption (industrial sites)
GRTgaz' forecast of consumption of industrial sites excepted SFM.

GRTgaz' forecast of consumption (DN)
GRTgaz' forecast of consumption of public distribution distribution network.

GRTgaz' forecast of consumption( SFM)
GRTgaz' forecast of consumption of very high modulated sites.

GRTgaz' forecast of consumption (regional)
GRTgaz' forecast of consumption of regional networks.

Shippers' forecast of consumption
Shippers' forecast of consumption based on their nominations at delivery points.

Average temperature
Average temperature measured at Paris for the North balancing zone, Lille for the NorthB balancing zone and Lyon for the South balancing zone.

Hourly consumption : Hourly consumption at all delivery points. For the current gasday, hourly consumption data are based on forecasts.

Actual hourly consumption of last year : Hourly consumption measured at all delivery points on the previous year on an equivalent calendar day.

Gas exchanges at PEG

Traded volume
For a given period, quantity of natural gas traded on the virtual transfer points. This value includes OTC (Over the Counter) transactions, gas exchange transactions and transactions concluded by GRTgaz with shippers for its own needs and its balancing requirements.

Number of exchanges
Number of transactions observed on the virtual transfer points. This value includes OTC (Over the Counter) transactions, gas exchange transactions and transactions concluded by GRTgaz with shippers for its own needs and its balancing requirements.

Volume physically traded
Sum of the net buys of the net buyers on the virtual trading point.

Churn rate
Ratio of traded quantities to physical gas deliveries after trades. It corresponds to the number of times the gas' owner changed at the virtual trading point.

Number of active buyers
It is the number of market participant who traded at least once as a buyer at the hub.

Number of active sellers
It is the number of market participant who traded at least once as a seller at the hub.

k0

GRTgaz action
Purchase if the network' imbalance is due to a lack of gas. Purchase if the network' imbalance is due to an excess of gas.

GRTgaz' needs
Represents the balancing needs of GRTgaz.

Composante
S/O.

Daily average price
Energy weighted average price of all the gas trades of titles products in respect of a given gasday carried out on the trading platform managed by Powernext.

Quantity transacted
Quantity of gas traded by GRTgaz with the market for balancing needs.

Marginal buying price
Level of price to cash out the shippers' lack of gas beyond their tolerance.

Marginal selling price
Level of price to cash out the shippers' excess of gaz beyond their tolerance.

Shippers' scheduling imbalance
For a given nomination cycle, the difference between the entries and exits scheduled by all shippers on the transmission system.

Imbalances cashed out through the ALIZES service
Sum of the shippers’ imbalances cashed out with the activation of the ALIZES flexibility service.

Imbalances cashed out by buys at marginal price
Sum of the shippers' imbalances cashed out by GRTgaz buying gas at marginal price to shippers.

Imbalances cashed out by sells at marginal price
Sum of the shippers' imbalances cashed out by GRTgaz selling gas at marginal price to shippers.

Distribution of entries on the network
Breakdown of the transmission system's entries by type of point.

Distribution of exits of the network
Breakdown of the transmission system's exits by type of point.

Linepack
Level of natural gas available in GRTgaz's transmission system pipelines. This indicator is updated every hour.

Forecast of linepack at the end of the day
For a given day, level of available gas expected in GRTgaz's pipelines at the end of a gas day.

Network imbalance position estimated for the end of the withinday gasday
Qualitative indicator concerning the absolute umbalanced position of the network at the end of the current gasday.

Network imbalance position estimated for the end of dayahead gasday
Qualitative indicator concerning the absolute umbalanced position of the network at the end of the day ahead gasday.

Projected Closing line pack
The Projected Closing line pack stands for the estimated line pack level of the transportation network at the end of a given gasday (withinday or dayahead).

Maintenance schedule

Maximum technical capacity
Theoretical maximum physical quantity of natural gas that can be carried at one contractual point of the network during one gasday. It does not take into account particular conditions such as maintenance, very low or high temperature... Such capacity does not refer to firm and/or interruptible capacity.

Minimum planned effective capacity
Level of technical capacity planned taking into account the worst scenario of constraints for the network.

Maximum planned effective capacity
Level of technical capacity planned taking into account the best scenario of constraints for the network.

Restriction rate on firm capacity
Reduction rate applied to the firm portion of the shippers' operational capacity.

Restriction rate on interruptible capacity
Reduction rate applied to the interruptible portion of the shippers' operational capacity. This rate is calculated for each type of capacity product: annual, quarterly, monthly and daily capacities.

Minimum restriction rate planned on firm capacity
Planned reduction rate applied to the firm portion of the shippers' operational capacity taking into account the best scenario of constraints for the network.

Maximum restriction rate planned on firm capacity
Planned reduction rate applied to the firm portion of the shippers' operational capacity taking into account the worst scenario of constraints for the network.

Minimum restriction rate planned on interruptible capacity
Planned reduction rate applied to the interruptible portion of the shippers' operational capacity taking into account the best scenario of constraints for the network. This rate is calculated for each type of capacity product: annual, quarterly, monthly and daily capacities.

Maximum restriction rate planned on interruptible capacity
Planned reduction rate applied to the interruptible portion of the shippers' operational capacity taking into account the worst scenario of constraints for the network. This rate is calculated for each type of capacity product: annual, quarterly, monthly and daily capacities.

SP : superpoint

SSP : sub-superpoint

Intra-day flexibility

Flexibility service availability
On the basis of the latest information declared by the customer for the day concerned, GRTgaz establish a qualitative indicator of predictable Network stress in the form of a colour:
- "Green": GRTgaz expects to be able to fulfil all the schedules of the highly modulated sites ;
- "Red": GRTgaz is not sure that the proposed Schedules will be feasible.
This stress indicator is provided as a whole for highly modulated sites. This information is not binding on GRTgaz, and is provided on the basis of the data available to GRTgaz for the purpose of giving the customer a useful indication.

Restriction rate of the flexibility service
Reduction rate linked to lexibility service not available at 100%.

Flexibility demand
It is the quantification of the modulation in the volume delivered on the highly modulated site over a Day. It is equal to the sum of the differences in absolute value, for all hours of a day, between the hourly consumption recorded and the daily consumption recorded divided by 24, then divided by two.

Notice period
Minimum period between the time when the customer notifies GRTgaz of the modified schedule for the highly modulated site relating to a quantity greater than or equal to the flexibility tolerance and the start of its actual implementation by the customer. This period allows GRTgaz to take the operational measures that will guarantee security and continuity in the operation of the network. A Notice Period is identical for all highly modulated sites in a single subzone.

Congestion

GRTgaz's need :
Represent the needs of GRTgaz to decrease the congestion

Transacted quantity :
Quantity of gas traded by GRTgaz on the locational spread on the Marketplace

Average price :
Represents the total cost of the transactions divided by the transacted quantity

Vigilance Outlook

Interruption of sales and interruptible/UIOLI :
Curtailment of interruptible transport capacities (including backhaul and UIOLI) and stop of capacity trading on the points/direction which stress the limit. Only on the side of the limit's management.

Locational spread :
Call to the market on the gas stock exchange, with a twofold locational product: the TSOs buy gas downstream of the limit and sell it simultaneously upstream of the limit.

Mutualized restriction :
Partial restriction of firm capacities, pro-rata to the subscribed capacities, mutualized on a superpoint. Only on the side of the limit's management.