ENTSOG BAL NC Monitoring Report 2016

4.2 INDICATOR BAL.2: TOTAL TSO BALANCING VOLUME AS % OF MARKET VOLUME

The establishment of a residual balancing role for the TSO while leaving the primary balancing responsibility to the network users is one of the key principles of the BAL NC. Indicator BAL.2 might give an indication of how much gas is traded with the rest of the market by the TSO for balancing purposes relatively to the market entry volume. Additionally, as the ship- pers are allowed to balance their portfolios on a daily basis, all selling and buying volumes of TSO balancing actions within day can be seen

with the BAL.2 indicator. The BAL.2 indicator should aim to be minimised where possible.

It is calculated for each gas day only on which balancing actions by the TSO has been performed in GY 2015/2016. The total number of those gas days is additionally indicated per balancing zone/country in order to take the residual TSO balancing role better into account. In Map 1 an example of BAL.2 in a graph with explanations is provided below.

25%

Max

20%

On remaining 10% of the days the total TSO balancing volumes relative to the market entry volume of a balancing zone (BAL.2) have a range between 17% and max. of 20%.

On 80% of the days when TSO is performing balancing actions during the gas day, the total TSO balancing volumes relative to the market entry volume of a balancing zone (BAL.2) have a range between 9% and 17%.

15%

10%

On remaining 10% of the days the total TSO balancing volumes relative to the market entry volume of a balancing zone (BAL.2) have a range between min. of 5% and 9%.

5%

Min

0%

Balancing zone (no. of days with TSO bal.action)

Map 1:  Example of BAL.2 indicator on days with TSO balancing actions in GY 2015/2016

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