Positive Energy: how renewable electricity can transform ... - WWF UK

Scenario A2: Ambitious demand scenario with no
additional interconnection
Figure 5: GW of
installed capacity required
for scenario A2
GW OF INSTALLED CAPACITY REQUIRED IN 2030
Scenario A2
0 20 40 60 80 100 120 140 160
GW
Offshore wind
Onshore wind
Solar PV
Biomass and
geothermal
Tidal, wave
and hydro
Pumped storage
Existing
interconnectors
New
interconnectors
Gas
This scenario, like scenario A1, assumes no expansion of interconnection capacity
and relies on domestic gas generation capacity for system security. However, total
demand is significantly lower than under scenario A1 at 338TWh/a of electricity, with
peak demand at 56GW. Under this scenario, renewables meet 62%, or 210TWh/a, of
demand. As in scenario A1, a combination of gas fired plants with and without CCS
primarily meet remaining electricity demand. 44GW of gas generation capacity is
required, providing 128TWh/a of electricity.
Figure 6: Pathway to
2030, scenario A2 SCENARIO A2: ANNUAL ELECTRICITY CONSUMPTION
500
400
300
200
100
0
TWh 2010 2015 2020 2025 2030
Nuclear
Other fossil
Gas (with CCS)
Gas (without CCS)
Renewables
WWF-UK 2011 Positive Energy page 29