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

Scenario B2: Ambitious demand scenario with
high interconnection
Figure 9: GW of
installed capacity required
for scenarioB2
GW OF INSTALLED CAPACITY REQUIRED IN 2030
Scenario B2
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 combines the high level of interconnection in B1 with the ambitious
reductions in demand in scenario A2. Total demand is 338TWh/a with peak demand
at 56GW. 20GW of installed gas generation providing 128TWh/a of electricity is
required. The majority of this needs to be equipped with CCS technology to meet the
decarbonisation target. Interconnection, as in B1, allows the UK to import and export
electricity to balance supply and demand. It is again assumed that annual exports of
electricity are equal to annual imports. As in scenario A2, renewables meet 62% of net
demand totalling 210TWh/a. Of the four main scenarios, this one requires the least
conventional capacity for system security.
Figure 10: Pathway to
2030: scenario B2
SCENARIO B2: 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 31