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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.
0%
25%
20%
10%
15%
5%
Balancing zone
(no. of days with TSO bal.action)
Min
Max
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 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%.
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%.
Map 1:
Example of BAL.2 indicator on days with TSO balancing actions in GY 2015/2016
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