Download Project 26 - Austria - Italy

Project 26 - Austria - Italy
Reinforcement of the interconnection between Italy and Austria via two new crossborder links at 380 kV and 220 kV and
closure of the 380-kV-Security Ring in Austria.
Classification
Long-term Project
Boundary
Austria - Italy
PCI label
3.2.1 (Lienz - Veneto region) and
3.2.2 (Lienz - Obersielach)
Promoted by
APG;TERNA
Investments
Investment
ID
63
218
614
1039
Description
Reconstruction of the
existing 220kVinterconnection line as
380kV-line on an
optimized route
New 380kV
OHL connecting the
substations Lienz (AT)
and Obersielach (AT)
New 220kV
interconnector between
the substations Nauders
(AT) and Glorenza (IT)
New 380/220/132 kV
substation
GTC
Contribution
70-80%
20-30%
Substation Substation
1
2
Present
Status
Commissioning
Date
Evolution
since
TYNDP
2014
Evolution Driver
Veneto
region (IT)
Planning
2024
Rescheduled
Planning in progress
coordinatedly between
TERNA and APG
Lienz (AT)
Obersielach
Lienz (AT)
(AT)
20-30%
Nauders
(AT)
100%
Volpago
(IT)
Glorenza
(IT)
Planning
2024
Rescheduled
Tests and gaining of
experience for novel
technical solution in
progress.
Design
2020
Delayed
Common planning
progress between Terna
and APG ongoing.
Planning
2022
Investment
on time
-
Additional Information
With the decision C(2013) 7520, the Terna and APG application for TEN-E programm (TEN-E 319/12) for "network and
feasability study for a new alternate current extra high voltage Interconnection" has been approved, the goal of the study
is to analyse the possibility to increase the cross border capacity through removing the existing limitation on the 220 kV
existing line as well. The TEN-E programm will identify the temporal steps of the project implementation.
The PCI 3.2.2 / investment 218 is part of the Austrian 380-kV ring and therefore a major basis for a secure and efficient
connection of existing generation and demand areas as well as a prerequisite for further connection of hydro storage
power plants in the western/southern part of Austria as well as for realisation of further powerful interconnectors.
Looking at the investment 218 itself without the context of the project 26, the increase of transmission capacity is not only
given on the AT-IT border. Due to the fact, that this investment is the key for closing the important 380-kV-ring in Austria,
an capacity increase on regional level and for wide area transports is achieved. Therefore additional benefits in terms of
GTC increases on other borders than “AT-IT” are existent but were not in the scope of the assessment of project 26 within
the TYNDP. These benefits on other borders have to be respected for assessment according to Regulation 347 Annex
IV.1. In sum the increases on all borders e.g. together with Germany or Slovenia are higher than 500 MW.
Link to last release of the Italian National Development Plan 2016
http://www.terna.it/it-it/sistemaelettrico/pianodisviluppodellarete/pianidisviluppo.aspx
Link to last release of the Austrian National Development Plan:
http://www.apg.at/en/grid/grid%20expansion/Netzentwicklungsplan
Investment needs
Historically, the main driver for grid development on the Northern Italian borders is the integration of the Italian peninsular
system, with predominant gas generation, into the main European system where prices are ususally lower. Therefore this
border, and more in general the Italian Northern boundary, is mainly used in import direction towards Italy. Nevertheless,
according to the TYNDP2016 market simulations this behaviour above described could change in low load hours,
especially in "high RES scenario", where the flows could be in the opposite directions.
This interconnection, therefore, will allow to increase the efficient use of EU generation in low CO2 price scenario, by the
possibility to cover the Italian demand through the cheaper power plants located in North-East Europe, while, in high CO2
price scenario, it will allow to improve the integration of Italian RES generation to the rest of EU system, by the use
of pumping storage capacity located in Austria.
The high SEW/GTC values in the V2 and V1 are mainly related to the lower CO2 value used in the scenarios that makes
coal generation cheaper than gas and leads to higher Italian import, especially for V2. On the opposite side in V3 and V4,
the higher CO2 costs and the higher RES generation capacity lead to a different use of the Italian Northern boundary,
characterized by a lower SEW, but higher RES integration indicators values.
Project Cost Benefit Analysis
This project has been assessed by ENTSO-E in line with the Cost Benefit Analysis methodology, approved by the EC in
February 2015.
Projects 26, 31, 150, 174, 21, 210 and 250 at the North-Italian boundary are assessed with multiple TOOT steps to reflect
the sequence of expected commissioning dates.
The indicators B6/B7 reflect particular technical system aspects of projects based on a summation of qualitative
performance indicators, in line with the CBA methodology; these cannot be used as a proxy for the security of supply
indicator.
The assessment of losses variations induced by the projects improved in the TYNDP 2016 compared to the TYNDP 2014
with a comprehensive all year round computations on a wide-area model capturing all relevant flows.
The results must however be considered with caution and not totally reliable due to their very high sensitivity to
assumptions regarding the detailed location of generation which are not secured.
General CBA Indicators
Delta GTC contribution (2020) [MW]
Delta GTC was not checked for 2020 and the 2030 values were considered for
SEW, RES and CO2 assessment.
Delta GTC contribution (2030) [MW]
IT-AT: 1000
AT-IT: 1100
Capex Costs 2015 (M€)
Source: Project Promoter
715 ±100
The estimated costs include:
Cost explanation
S1
Item 63 (Lienz – Veneto Region)
Item 218 (Lienz – Obersielach)
Item 614 (Nauders – Glorenza and internal reinforcements)
Item 1039 (S/E Volpago)
Negligible or less than 15km
S2
Negligible or less than 15km
B6
+
B7
++
Scenario specific CBA indicators
EP2020
Vision 1
Vision 2
Vision 3
Vision 4
B1 SoS (MWh/yr)
N/A
N/A
N/A
N/A
N/A
B2 SEW (MEuros/yr)
N/A
30 ±10
30 ±20
20 ±20
10 ±10
B3 RES integration (GWh/yr)
N/A
<10
<10
70 ±60
30 ±20
B4 Losses (GWh/yr)
N/A
75 ±25
75 ±25
-425 ±42
-150 ±25
B4 Losses (Meuros/yr)
N/A
4 ±1
3 ±2
-26 ±3
-10 ±2
B5 CO2 Emissions (kT/year)
N/A
600 ±200
400 ±200
-100 ±100
-300 ±100
The project has been assessed according to multiple TOOT approach on the Italian Northern Border.
In the CBA results, only the GTC increase on the common border AT-IT is calculated. It is important to mention, that
especially for the Austrian internal investment 218, also the GTC on other Austrian borders is possitively influenced due to
the fact that internal congestions are relieved.
The project’s SEW accounts for saving in generation fuel and operating costs. The project could also enable savings
avoiding investments in generation capacity, in particular for projects connecting electric peninsulas. The aspect has not
been considered in the CBA methodology
Complementary information about the border on
which the project is located
Vision 1
Vision 2
Vision 3
Vision 4
Average marginal cost difference in the reference case
[€/MWh]
1.43
1.14
1.42
0.91
Standard deviation marginal cost difference in the
reference case [€/MWh]
4.97
4.50
8.33
5.85
13.20
2.11
2.01
Reduction of marginal cost difference due to all mid-term 11.00
and long-term projects [€/MWh]
Comment on the security of supply: The security of supply (SoS) indicator is to be understood in the way it is defined
within the Cost Benefit Analysis methodology which focuses merely on the connection of partly isolated grid areas. In
general in rather meshed parts of the transmission grids other aspects are more significant for the security of supply (e.g.
n-1-margin, cascade effects, etc.) and therefore the project benefit indicator on SoS according to the CBA methodology
underestimates the real value of the project. The considered project is vital for the Austrian SoS. It comprises an important
part of the Austrian 380-kV-Security Ring, enforces the east-west connection in Carinthia and improves the connection to
distribution grids.