Fallago Rig Windfarm
EDF Energy Renewables is one of the UK’s leading renewable energy companies. It is currently focussing on the development, construction and operation of onshore and offshore windfarms and operates 462MW of onshore windfarms.
Fallago Rig is one our most significant onshore developments to date but is just part of our continued investment and delivery of new, local carbon generating capacity for the UK. The 48 turbine site in the Lammermuir hills in Berwickshire is capable of producing 144MW of clean energy, supplying the annual electrical equivalent of 90,000 homes.
Nestled in a natural upland bowl, the site is naturally screened and at this elevation takes natural advantage of the ideal wind conditions. Its proximity to the super grid line between Torness and Smeaton also allows a direct connection to the grid. The layout is designed to minimise the impact on the landscape, minimising track lengths, impact on bog areas and stream or river crossings. The design incorporated the use of natural resources to avoid the import of 420,000 tonnes of aggregate, sand and crushed material for roads and concrete and in doing soavoiding 42,000 HGV movements on and off site.
The site is mainly open managed grouse moorland coved in a mixture of mainly managed heather, acid grasses and sphagnum mosses. A land management scheme to create habitats and enhance existing habitats has been implemented. This includes the planting of over 5,000 trees. Heather seed harvesting on site over the last 3 winters ensures species natural to the site are encouraged. Despite the intensive works over the last two grouse seasons the level of grouse breeding has not been affected.
The project team looked for opportunities to maximise the availability of natural resources available at site such as rock from the newly created quarries available for constructing the 36km of site roads and manufacturing aggregate for all concrete requirements. This greatly reduced the number of vehicle deliveries moving through local towns and villages as well as saving time and considerable costs on fuel and logistics.
John Dixon, Wind Prospect Project Manager
EDF Energy Renewables employs over 60 people and has a pipeline of onshore projects totalling more than 1,000MW in development. EDF Energy Renewables is a 50/50 joint venture between EDF Energy and EDF Energies Nouvelles set-up in 2008 to develop, build, own and operate renewable assets in the UK. Our plan is to continue our development of new renewable capacity for the UK with a focus on both onshore and offshore wind power. We are actively considering new projects across the UK, including a new joint venture with Amec Foster Wheeler at the Stornoway and Uisenis Wind Farm projects on the Isle of Lewis. Remote island wind is one of the most efficient wind technologies and generates 30% more wind power than the mainland UK average. This means better value for customers, including substantial investment into the local economy with analysis highlighting £416 million in financial benefit to the Western Isles alone to 2050.
Corriemolillie Wind Farm
EDF Energy Renewables is continuing to deliver its ambition of net zero environmental impact by providing affordable low carbon electricity whilst also providing a net positive environmental impact. During the development of the new Corriemoillie wind farm, we have worked to restore and protect surrounding peat bog, enhance the breeding population of red throated divers and worked to increase the population of otters, bats, water vole, wild cat and pine martin.
The Corriemoillie Wind Farm site (and the wider Corriemoillie Estate) is located 7km northwest of Garve in the Scottish Highlands and is being developed by EDF Energy Renewables, a 50:50 joint venture between EDF Energy and EDF Energies Nouvelles.
The wind farm construction started in 2015 and the site became operational in December 2016. It consists of 19 turbines with a generating capacity of up to 60.8MW. During the project, a targeted peat bog restoration area was established over an area of 50 hectares with the removal of 31 ha of failed and subsequently felled woodland and 0.8 ha of open water. In addition, a 500m long corridor was designed into the wind farm layout and a row of conifers was retained to support the breeding of rare red-throated divers in the area.
55 hectares of peat bog have now been restored and protected from active erosion. Given peat’s high carbon content, these two actions are forecast to save around 80 tonnes CO2eq per year. In addition to the positive impact on potential carbon output, the restored peat bog is now providing enhanced flood attenuation for communities’ down-stream of the project through its ability reduce the overall speed of water flow through the catchment.
This pro-active work has resulted in a net gain for biodiversity and the local community, whilst using the lessons learnt to improve outcomes in the future. The peat bog is an internationally threatened habitat and we will continue to ensure its continued protection, and for the species that depend upon it
The Corriemoillie estate is home to a population of red-throated divers – a rare species that are mainly found in northern Scotland. Two key mitigation measures were proposed at the planning stage of the wind farm to enable divers to breed successfully across the site. A 500m corridor was designed into the wind farm layout to enable the divers to access the identified breeding loch via their preferred flyway route and minimise collision risk. In addition, a stand of conifers was retained around the breeding loch and to minimise the visual disturbance of the birds by activities on site. To encourage further breeding pairs to the site, diver rafts have also been scheduled for construction and will be put out on site in a suitable location later in 2018 prior to breeding pairs returning to the site to prospect for nests.
The red-throated divers have bred successfully during the construction period of 2016 and during the first year of operations in 2017. The birds have reared a total of 3 chicks over these two years; an excellent success rate that exceeds the national average of less than 1 chick per year.
Lighting Improvements at Cottam
In early 2016, Cottam upgraded its turbine hall lighting, replacing high intensity discharge (HID) lamps with light emitting diode (LED) lamps. The benefits of this improvement include annual carbon savings of around 115 tonnes and financial savings of around £10,500 per year.
As part of its commitment to saving energy, in early 2016 Cottam replaced 96 400W HID lamps with 96 150W LED lights in its turbine hall. The station’s Infrastructure and Services Team engaged with existing suppliers to source the LEDs and an onsite electrical contract partner who installed them.
The Team had to wait for turbine hall cranes to become available, as these would provide the safe access required to reach the lamps. To help keep costs down, the original light fittings were not replaced, just the lights themselves. This worked out well as the LEDs screw in and out of the original fittings easily with no compatibility problems. The installation took place over a week in February 2016 with excellent results.
LEDs last much longer than HID lamps (around 30,000 hours on average). It’s calculated that they will reduce the station’s energy consumption by around 210 MWh per year. This cut in energy use will reduce Cottam’s carbon emissions by around 115 tonnes a year. Using fewer lights lowers the station’s overall resource use and the amount of waste it produces. This is an example of the waste hierarchy in action; that is, avoiding waste by using fewer resources in the first place. Lastly, replacing lights less often contributes to fewer deliveries and in turn fewer vehicle movements on site, which in turn, lowers related vehicle emissions.
The LEDs pay for themselves within two years and then generate ongoing savings of £10,500 per year. Given that LEDs last much longer than HID lamps, this lighting upgrade will save employee time and resource that would otherwise be spent ordering, fitting and disposing of the lamps. Having fewer lights to dispose of also reduces the station’s waste bill over the long term.
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