3.4 INDICATOR BAL.4: NET SHIPPER IMBALANCE VOLUME
AS % OF MARKET VOLUME
ENTSOG proposes an indicator which is calcu-
lated by dividing the total daily net imbalance
volume of shippers
2)
through the market volume
(within a balancing zone).
This indicator aims at assessing whether the
overall system is in balance on a day-on-day
principle and whether the network users con-
tribute sufficiently to keeping the overall system
in balance. ENTSOG suggests using aggregated
portfolio data to assess whether 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.
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.
INPUT DATA FOR
INDICATOR BAL.4
DEFINITION
Net imbalance volume
of shippers
The net imbalance volume of shippers is calculated as the sum of the imbalance values of all shippers that are long at
the end of the gas day (positive value) and the sum of the imbalance values of all shippers that are short at the end of
the gas day (negative value).
Formula:
Net imbalance volume of shippers [in MWh/runtime] =
∑Imbalance volume [LONG] of shippers [in MWh/runtime] + ∑ Imbalance volume [SHORT] of shippers
[in MWh/runtime].
Market Volume
Market volume means 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 [in MWh/runtime].
Indicator BAL.4
Indicator BAL.4 (runtime) = ∑ Net imbalance volume of shippers (per runtime)/market volume (per runtime) [in %].
INDICATOR BAL.4
DEFINITION
BAL.4: Net imbalance
volume of shippers as %
of market volume
The BAL.4 indicator is calculated on a daily basis by dividing the total net imbalance volumes of shippers [long and
short] at the end of gas day by the market volume at the end of gas day. The indicator might be provided for different
runtimes in the future.
Formula:
Indicator BAL.4 (runtime) =
∑Net imbalance volumes of shippers (per runtime)/market volume (per runtime) [in %].
Unit
TSO balancing volume as % of market volume
Aim
Decrease of % rate, minimised value.
Data requirements
Unit
Absolute volumes in MWh (provided per gas day)
Minimum unit
MWh (provided per gas day)
Requested data runtime
1 October 2015 – 30 September 2016 (gas day)
1) In France.
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