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Ten Year Network Development Plan 2015 |

133

6.1 Introduction

ENTSOG has carried out an extensive assessment of

the European gas system in order to identify potential

investment needs and solutions. This assessment

represents the TYNDP-Step of the Energy System-

Wide Cost-Benefit Analysis (ESW-CBA) and as such

it focuses on different levels of infrastructure

development rather than on single projects.

The analysis of project benefits will be carried out for

each candidate Project of Common Interest submitted

by promoters as part of the Project-Specific-Step of

the ESW-CBA after the release of the Report. For this

second PCI selection it is ENTSOG that will apply the

methodology quantifying project benefits.

6.1.1 GENERAL CONSIDERATION ON

ASSESSMENT RESULTS

In preparation to this individual assessment, the Report focuses on the Low and

High Infrastructure scenarios. The assessment under the PCI one mostly served as

a feedback loop to previous selection and results are very similar than under the

High scenario.

As a comparison with TYNDP 2013, the assessment has been extended. First the

considered period now covers a 21-year time horizon instead of a 10-year time

horizon. This has increased the need to better capture future uncertainty through

the selection of meaningful scenarios. Then the scope of the assessment is wider

through the introduction of new indicators and financial analysis giving additional

perspectives on the European gas system. New scenarios have been introduced for

demand, infrastructure and gas prices.

The assessment also benefits from an enhanced modelling approach, which consid-

ers fuel prices, the dynamic simulation of gas demand for power generation and the

seasonality of gas demand.

The following assessment results should not be understood as any form of forecast

but rather as a robust approach identifying a potential future range of scenarios. This

means that the evolution of indicator values over time and from one infrastructure

scenario compared to another is more meaningful than the absolute values. In

addition, there is no threshold defined for most indicators and this prevents the

absolute definition of investment gaps. In the past, ENTSOG drew the attention of

markets and institutions to this situation and the fact that defining a threshold level

for triggering investment is beyond the remit TSOs and ENTSOG.

The results included in this chapter have been selected on the basis that they illus-

trate the main trends in the evolution of the European gas system. Detailed results

are available in Annex E. The description of the modelling approach, indicators and

financial analysis is available in Annex F.