ENTSOG First Report on Implementation Monitoring and Baseline for Effect Monitoring of the Tariff Network Code

The combination of the ABRR and SDBRR results suggests that between 2013 and 2016 the imbalance slightly grew in absolute terms and became slightly more stable over the years. Over all TSOs, this result means a slightly increased trend to persistent under-recovery or over-recovery. Results on ABRR and SDBRR on such a reduced time horizon with partly overlapping years and a reduced sample size are probably not very significant. As for the current years and sample, the results are summarised in the following table. Green cells indicate a favourable evolution in terms of the relevant sub-indicator ABRR or SDBRR: a reduction in the absolute value of ABRR and/or in SDBRR. Orange cells correspond to a negative evolution, i. e. an increase in the absolute value of ABRR and/or SDBRR. Most TSOs are in the situation where the evolution is mixed, which means that they experienced either a reduced absolute ABRR coupled with an increasing SDBRR, or an increasing absolute ABRR coupled with a reduced SDBRR. TSO_08 could not be assessed since no validation of the regulatory account balance has been yet approved for 2016.

QUALITATIVE EVOLUTION

Evolution since 2013 Sub-indicator ABRR

Sub-indicator SDBRR

TSO_01 TSO_02 TSO_03 TSO_04 TSO_05 TSO_06 TSO_07 TSO_08

N/A

N/A

TSO_09

Table 1: Qualitative evolution of TAR.1 sub-indicators ABRR and SDBRR

The figure below shows the evolution of TSOs between the overlapping 2013 –15 and 2014–16 periods.

SDBRR in %

Evolution of ABRR and SDBRR

14 12 10 16 18 20

TSO_09

TSO_03

TSO_08

TSO_01

0 8 6 4 2

TSO_04

TSO_06

TSO_05

TSO_02

ABRR in %

TSO_07

–40

–30

–20

–10

0

10

20

2013 – 15 period

2014 – 16 period

Figure 31: Graphical evolution of TAR.1 sub-indicators ABRR and SDBRR

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TAR NC Implementation and Effect Monitoring Report 2017