ENTSOG BAL NC Monitoring Report 2016

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

MARKET VOLUME

ENTSOG is of the opinion that 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:

ENTSOG proposes an indicator BAL.2 which is

calculated by dividing the daily total quantity of

gas conducted by the TSO for balancing purpos-

es through the daily total gas market entry vol-

ume. This indicator gives an indication of how

much gas is traded with the rest of the market by

the TSO for balancing purposes compared to the

market volume. The entry volumes into the bal-

ancing zone (or market area) are used as the

market volume. The entry volumes mean the

quantity allocated at all entry points into a bal-

ancing zone (or market area) including e. g.

virtual IPs, LNG, productions and storages and

excluding entries from the VTP.

As the TSO has the knowledge about its own

traded gas volumes for balancing purposes as

well as an overview of the gas entering and leav-

ing the system, the data for the calculation of the

indicator should be available for all TSOs.

The aim of the BAL NC is to maximise the use of

STSPs, where possible. As many TSOs are using

balancing services or have interim measures in

place, ENTSOG proposes to combine in those

cases the results of indicator BAL.2 with BAL.1

in order to distinguish better between TSO bal-

ancing volumes provided via the short-term

wholesale market and those via other products.

INPUT DATA FOR

INDICATOR BAL.2

DEFINITION

Total TSO balancing

volume

Total TSO balancing volume is calculated as the sum of gas volumes [SELL +BUY] of all balancing products which

are conducted by the TSO within a gas day following a merit order for balancing purposes.

Formula:

Total TSO balancing volume [in MWh/runtime/balancing zone] =

∑ volumes of STSPs [in MWh/runtime] + ∑ volumes of balancing services [in MWh/runtime] + ∑ volumes of Interim

Measures [in MWh/runtime].

Market Volume

Market volume means the quantity allocated at all entry points into a balancing zone (or market area) including e. g.

virtual IPs, LNG, productions and storages and excluding entries from the VTP [in MWh/runtime].

Indicator BAL.2

Indicator BAL.2 (per runtime) =

∑ TSO balancing volumes in MWh/runtime)/∑ market volume in MWh/runtime [in %]

INDICATOR BAL.2

DEFINITION

BAL.2: Total TSO balancing

volume as % of market

volume

The BAL.2

indicator is calculated [per gas day] by dividing the total quantity of gas traded by the TSO for balancing

purposes following a merit order (within a balancing zone) divided by the market volume within a balancing zone.

The indicator is provided for each gas day in GY 2015/2016 when TSO balancing actions occur. (Different runtimes

on a yearly, quarterly and monthly basis) might be provided for the future.)

If no balancing actions have been undertaken by the TSO for a gas day, the BAL.2 indicator is not calculated.

Formula:

Indicator BAL.2 (runtime) =

Total quantity of gas traded by the TSO(s) for balancing purposes within a balancing zone (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 ) See also BAL.1 input data regarding the balancing products used in the formula.

ENTSOG BAL NC Monitoring Report 2016 |