ENTSOG Implementation and Monitoring Report 2017 - Balancing Network Code

Ireland, Northern Ireland and Sweden have larg- er balancing actions. Ireland traded volume are decreasing (−40% compared to GY 2015/2016) but the number of days is increasing from 70 to 104 days/year. Northern Ireland is slightly mov- ing in the right direction since the volume and the number of days have been reduced. Sweden is stable except for the extreme maximal volume which dramatically raise (+80%). Greece has the largest range of balancing actions. However, the maximal volumes traded have been reduced by two thirds. The number

of days when balancing actions have been taken has increased from 32%. The yearly BAL.2. indicator in annex III shows a slightly different ranking because PL-H has almost daily balanc- ing actions: LT, then SE, IE, UK-NI and PL-H, finally Greece. If you compare all the TSO balancing volume to the domestic consumption, the ranking does not really change (see Annex IV). UK-GB and HU are exchanging their rank. Italy is better ranked than Gaspool and SI. PL-H is before TRS.

2.3. INDICATOR BAL.3: NET TSO BALANCING VOLUME AS % OF MARKET VOLUME VS. INDICATOR BAL.4: NET SHIPPER IMBALANCE VOLUME AS % OF MARKET VOLUME

2.3.1 Description

2.3.1.1 BAL.3

2.3.1.2 BAL.4

ENTSOG proposes a second indicator related to the residual balancing role of the TSO. This indicator BAL.3 is calculated by dividing the net quantity of gas traded by the TSO for balancing purposes through the market volume per gas day. It gives an indication if relatively more gas is bought or sold by the TSO due to balancing purposes at the end of the gas day. The entry volumes into the balancing zone (or market area) is used as the market volume. The entry volumes mean the quantity allocated at all entry points into a balancing zone (or market area)  1) including e. g. virtual IPs, LNG, productions and storages and excluding entries from the VTP. The prevailing direction, if any, of the TSO’s balancing actions (i. e. buying or selling more than 65% of the time) will also be analysed.

ENTSOG proposes an indicator which is calcu- lated by dividing the total daily net imbalance volume of shippers  2) through the market volume. This indicator aims at assessing whether the overall system is in balance on a day-on-day principle and whether the network users contribute sufficiently to keeping the overall system in balance. The BAL.4 indicator is used in combination with BAL.3 in order to compare relatively the net imbalance volume of shippers and the counteracting net balancing volume of the TSO. The prevailing direction, if any, of the market imbalance (short or long market more than 65% of the time) will also be analysed.

1) In France. 2) As per Article 21 BAL NC the imbalance quantities shall be calculated by the TSO as a daily imbalance quantity for each NU’s portfolio for each gas day.

INDICATOR BAL.3

DEFINITION

The BAL.3 indicator is calculated by dividing the net quantity (SELL-BUY) of gas traded/conducted by the TSO divided by the market volume per gas day. If no balancing actions have been undertaken by the TSO for the gas day, the BAL.3 indicator is zero*. Formula: Indicator BAL.3 = Net quantity of gas traded by the TSO(s) for balancing purposes within a balancing zone/market volume

BAL.3: Net TSO balancing volume as % of market volume

Unit

TSO balancing volume as % of market volume

Aim

Decrease of % rate, minimised value.

* Last year BAL 3 was not calculated when the TSO was not taking a balancing action during the day. The rationale of the change is to be able to better compare BAL 3 and BAL 4.

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ENTSOG BAL NC Implementation and Effect Monitoring Report 2017

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