ENTSOG Gas Regional Investment Plan South 2017 - Main Report

As it can be seen, each country demand has a different variation on a seasonal ba- sis which is mainly due to different share of the residential and commercial sector (which represents more than half of the yearly demand in France as an example), stressed by different climate conditions. On the other hand, the weekly modulation is higher in Spain and Portugal, which is mainly due to Spain and Portugal both using gas more for power generation and industry. The gas demand for power generation in 2015 and in 2016 is shown in Figure 3.9. It shows how the demand for power generation fluctuates a lot less with the seasons compared to the conventional demand (shown in Figure 3.8). It also shows the huge range found in the demand values explained by the role played by gas for power generation in providing flexibility for the electrical system demand modulation, in particular to deal with the intermittency of some renewable power generation (main- ly for wind and solar sources).

GWh/d, Demand

800 900 GWh/d

2015

2015

0 0.1 0.2 0.3 0.6 0.7 0.4 0.5 0.8 0.9 0 0.1 0.2 0.3 0.6 0.7 0.4 0.5 0.8 0.9

0 100 200 300 600 700 400 500

Jan Feb Mar Apr May Jun Jul

Aug Sep Oct Nov Dec

Jan Feb Mar Apr May Jun Jul

Aug Sep Oct Nov Dec

Average

Range

Daily Demand

GWh/d, Demand

800 900 GWh/d

2016

2016

0 100 200 300 600 700 400 500

Jan Feb Mar Apr May Jun Jul

Aug Sep Oct Nov Dec

Jan Feb Mar Apr May Jun Jul

Aug Sep Oct Nov Dec

Average

Daily Demand

Range

Figure 3.9: Gas Demand for power generation in 2015 and in 2016 in the South Region. (Source: ENTSOG TYNDP 2017 data, own elaboration)

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Gas Regional Investment Plan of the South Region 2017