IEEE Power & Energy Magazine - May/June 2015 - 36

Higher Wind
in the Winter

120

Higher Solar in
the Summer

100

OCGT
Storage1
Hydro
CSP
PV

Twh/Week

80

Wind
Geothermal

60

Biomass
40

Oil
Gas

20

Coal

1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51

Nuclear
-

Demand

Week

figure 1. Solar and wind are seasonally complementary.

Toward a European Megagrid:
Facilitating the Decarbonization
of the EU Energy System
To support this vision and facilitate the shift from the member-state centric to a EU-wide approach to decarbonization,
a EU renewable energy directive was introduced to allow
member states with lower renewable generation potential or
higher costs to partially fulfill their renewables targets in or
with other member states. This mechanism should provide
incentives for investments in renewable power generation
in locations with the most resources and a high renewable
generation potential and therefore facilitates a cost-effective
development of renewable energy generation in the European electricity system. (Although there are challenges in
fully implementing the directive, the benefits of an EU-wide
approach to deploying renewable generation are very significant, exceeding €200 billion by 2030.)
To deliver this EU-wide deployment of renewables, present interregional transmission must fundamentally change
from a minor trading and reserve-sharing role to one that
allows for very substantial energy exchanges between
regions across the year, enabling a wider sharing of renewable generation resources and enhancing the ability of the
system to integrate renewable energy sources (RES). The
addition of significant new transmission capacity, with several thousand kilometers of new interregional transmission
infrastructure, will be required to support a cost-effective
integration of RESs. The analysis presented in Roadmap
2050 suggests that the overall expansion would require a factor of three increase in interregional transmission capacity
from today's levels. In some corridors, the expansion would
be even greater, such as in Iberia to France, where capacity is
36

ieee power & energy magazine

currently under 1 GW and the required increase would range
from 15 to 30 GW, depending on the level of RES penetration. This extended regional transmission network, the EU
megagrid (supergrid), is not just about increased interconnection, it is also about integrating offshore renewable generation into the transmission system to optimize the output
of technologies like offshore wind, marine, and tidal energy.
The strategic development of an offshore network would
integrate offshore grids and interconnection, significantly
reducing costs and enabling more efficient resource sharing.
The EU megagrid would also enable the exploitation
of counter-cyclicality among primary renewable energy
sources, with solar in southern Europe and wind mostly
in the north of Europe. The analysis clearly demonstrates
the benefits of regional interconnection given the fact that
wind is (seasonally) negatively correlated with solar; solar
produces more in the summer, while the opposite is true for
wind, as presented in Figure 1.
Furthermore, this additional interregional transmission
would be particularly effective in enabling the system to
benefit from diversity in demand and supply across the European Union, and it would allow sharing of geographically
and technologically diverse energy resources across Europe.
Without such interregional supply sharing, it would become
far more challenging for individual regions to achieve the
decarbonization and RES penetration targets. Clearly, in
addition to facilitating the transport of renewable energy,
significant interregional transmission infrastructure will
allow for sharing of short- and long-term reserves across the
European system. For example, wind output could be highly
volatile on a very local level, but empirical data for Europe
show that volatility dissipates substantially when measured
may/june 2015



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - May/June 2015

IEEE Power & Energy Magazine - May/June 2015 - Cover1
IEEE Power & Energy Magazine - May/June 2015 - Cover2
IEEE Power & Energy Magazine - May/June 2015 - 1
IEEE Power & Energy Magazine - May/June 2015 - 2
IEEE Power & Energy Magazine - May/June 2015 - 3
IEEE Power & Energy Magazine - May/June 2015 - 4
IEEE Power & Energy Magazine - May/June 2015 - 5
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IEEE Power & Energy Magazine - May/June 2015 - 81
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IEEE Power & Energy Magazine - May/June 2015 - 84
IEEE Power & Energy Magazine - May/June 2015 - 85
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IEEE Power & Energy Magazine - May/June 2015 - 88
IEEE Power & Energy Magazine - May/June 2015 - 89
IEEE Power & Energy Magazine - May/June 2015 - 90
IEEE Power & Energy Magazine - May/June 2015 - 91
IEEE Power & Energy Magazine - May/June 2015 - 92
IEEE Power & Energy Magazine - May/June 2015 - 93
IEEE Power & Energy Magazine - May/June 2015 - 94
IEEE Power & Energy Magazine - May/June 2015 - 95
IEEE Power & Energy Magazine - May/June 2015 - 96
IEEE Power & Energy Magazine - May/June 2015 - Cover3
IEEE Power & Energy Magazine - May/June 2015 - Cover4
https://www.nxtbook.com/nxtbooks/pes/powerenergy_091020
https://www.nxtbook.com/nxtbooks/pes/powerenergy_070820
https://www.nxtbook.com/nxtbooks/pes/powerenergy_050620
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https://www.nxtbook.com/nxtbooks/pes/powerenergy_070819
https://www.nxtbook.com/nxtbooks/pes/powerenergy_050619
https://www.nxtbook.com/nxtbooks/pes/powerenergy_030419
https://www.nxtbook.com/nxtbooks/pes/powerenergy_010219
https://www.nxtbook.com/nxtbooks/pes/powerenergy_111218
https://www.nxtbook.com/nxtbooks/pes/powerenergy_091018
https://www.nxtbook.com/nxtbooks/pes/powerenergy_070818
https://www.nxtbook.com/nxtbooks/pes/powerenergy_050618
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https://www.nxtbook.com/nxtbooks/pes/powerenergy_111215
https://www.nxtbook.com/nxtbooks/pes/powerenergy_091015
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https://www.nxtbook.com/nxtbooks/pes/powerenergy_091014
https://www.nxtbook.com/nxtbooks/pes/powerenergy_070814
https://www.nxtbook.com/nxtbooks/pes/powerenergy_050614
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