SH Newsletter January 2021 WEB - Flipbook - Page 16
Wind Focus: Repowering
The UK’s fourth Contracts for Difference (CfD) auction will be held in late 2021 and aims to contract up to
12GW of renewable energy capacity. This round extends the number of technologies supported, with UK
onshore wind developers being eligible to bid. Furthermore, it was highlighted in a forecast produced by
Cornwall Insight in 2020 that between 2027 and 2030 up to 3.6GW of existing onshore wind assets could drop
out of the Renewable Obligation scheme, with the majority approaching the end of an assumed 20-25 year
economic lifespan. Action is required to ensure that this capacity isn’t lost.
There are a number of options for existing onshore wind projects:
• Repowering with wind,
• Extending the lifespan of the existing technology,
• Establishing alternative energy sources (such as solar) with or without wind, or
• Decommissioning the facility in its entirety.
Site specific circumstances will dictate the best course of action with some
potential considerations as follows:
Planar projection, image size =
ImageW on A1 width sheet.
Proposed Wind Farm Layout
Does the relevant
policy situation support repowering?
Canon EOS 5D MkII
50mm Fixed Focal Length
HFOV = 53.5° and VFOV = 18.2°
Height to Blade Tip:
For Info - Precise
FoV for this SNH Template:
Nearest Visible Turbine:
T2 @ 3296m
Number of Sets of Tips Visible:
6 ImageW @ 812.5mm PDist = 53.55242806º FoV
Number of Hubs Visible: ² (Vertical) 260mm
ImageW @ 812.5mm PDist = 18.18055384º FoV
Meteorological Mast Height:
Whilst somewhat simplistic, relevant policies seem likely to be supportive of repowering except in England.
Whilst bidding for CfD is a new option to the English windfarm owner, there remain few locations where there
may be a realistic prospect of gaining community backing. Elsewhere
repowering (with taller turbines) brings
120°FoV = 2814.582562mm ImageW
ImageW impacts and potentially also
particular focus to the acceptability of changed landscape and
(NB: 50° FoV = 757.7499445mm ImageW)
for habitats and species
swept areas etc.
If not repowering, will a time extension buy time for the policy picture to improve?
In the English context it couldn’t get any worse so, provided the maintenance regime has been effective, this
may well be a sensible short-term response where evidence currently suggests a high degree of success. For
other jurisdictions these may also buy time for reviewing options but as noted above – repowering may well
be a better option.