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Other Information

This is where you'll be able to find out all the other things that you want to know about the Walney Offshore Windfarm project! We'll provide regular updates and information here about other aspects of the project.

This is where you'll be able to find out all the other things that you want to know about the Walney Offshore Windfarm project!

We'll provide regular updates and information here about other aspects of the project.

For example, there will be news about what's happening with turbine installation at sea, what kind of wildlife surveys have taken place, how the cables are laid, how the Directional Drilling is done - and lots more!

Where the public have asked questions relating to the overall project, those questions and answers will also be posted here.

Keep calling back to see if anything new has been added!

 

Walney Newsletter 24 Published

Fish enjoying the turbine legs

The Walney Newsletter no. 24 - March 20, 2012 has just been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • · Fish are pleased with offshore wind turbines
  • · 34 turbines in Walney 2 have had first power
  • · Walney Offshore Windfarms prepares for post-construction environmental surveys
  • · Energy for Life – Walney Fun Run 2012

Click here to read the newsletter.

 

Walney Newsletter 23 Published

newsletter 23

The Walney Newsletter no. 23 - February 20, 2012 has just been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • ·         The world’s largest offshore wind farm officially inaugurated
  • ·         All possible weather windows used to ensure progress
  • ·         Progress was also good for installation of armour stones for scour protection

Click here to read the newsletter.

 

Walney Newsletter 22 Published

walney windfarm

The Walney Newsletter no. 22 - January 23, 2012 has just been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • ·         Official inauguration of Walney Offshore Windfarms
  • ·         Mild, but windy weather
  • ·         Next cable string has been energised
  • ·         All array cables have been jetted
  • ·         Marine Coordinator reduces hours of operation

Click here to read the newsletter.

 

Walney Extension
Offshore Wind Farm -
Community Consultation -

 

Mini Consultation Report & Newsletter No 1, Winter 2011/2012

During 2011 a number of open consultation events were held in the region, these events provided an opportunity for discussion of project plans and timescales, and to obtain feedback from the local community which will assist with the development of the project.  275 people attended these events, and if you were one of them, the team hope that you found it informative and useful.

The feedback obtained from the local community and users of the area during the consultation period is invaluable in shaping plans for the proposed Walney Offshore Wind Farm Extension. Attached to this item you can read a Mini Consultation Report which provides a summary and the results from these events.

Download Mini Consultation Report here.

A variety of questions were asked, but in general terms the people who attended the event were in support of offshore windfarms, and agreed that climate change was as important issue with renewable energy being important for the future. The main concerns in relation to the creation of this extension were the visual and environmental impacts of the construction work and to sea users during and after completion. You can see a detailed breakdown of comments on the consultation report.

As part of the ongoing community consultation a series of regular newsletters will be published, these will give a brief overview and updates to the project plans and keeps you informed of any changes. Also attached to this item is the first edition of these newsletters.

First newsletter for Walney Extension Offshore Windfarm here.
 

The second round of community consultation events will be held during September 2012 and the team would be most grateful if you could encourage colleagues and local people to attend these events.  The views expressed really will guide the development of the project, so it is vital that as many people participate as possible.  Details of these events will be published on the website and in next newsletter, which will be published in Spring 2012.

If you have any questions or would like to receive additional information about our proposals, then please do not hesitate to contact Peter Sills, the Communication Manager, your feedback is greatly appreciated.

Peter N Sills - Communication Manager - Walney Extension Offshore Windfarm
Office:  +44 (0) 1929 552233
Mobile: +44 (0) 7976 437 467
Email: xpesi@dongenergy.dk

 

Walney Newsletter 21 Published

Walney newsletter 21

The Walney Newsletter no. 21 - December 20, 2011 has just

been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • ·         Windy weather conditions
  • ·         70,000 tonnes of armour stones are being brought to Walney site
  • ·         All array cables at Walney 2 placed on the seabed


Click here to read the newsletter.

 

Walney Newsletter 20 Published

Offshore substation

The Walney Newsletter no. 20 - November 21, 2011 has just

been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • ·         First power on Walney 2
  • ·         Series of test procedures
  • ·         O&M building in Barrow-in-Furness
  • ·         Weather is king
  • ·         Sale of transmission assets

Click here to read the newsletter.

 

First Power from the Walney 2 Offshore Windfarm

Walney offshore turbine

Walney 2 offshore wind farm has today, 1 November 2011, started delivering CO2-free electricity to the UK’s national grid, with electricity now being generated from the first of its 51 turbines.

Walney 1 was fully operational May 2011 and Walney 2 is expected to be fully operational by the end of 2011, making Walney the world's largest offshore wind farm, with a total capacity of 367.2MW of renewable energy production. This is enough to power around 320,000 UK homes or one-and-a-half times the number of homes in Cumbria.

DONG Energy (50.1%), SSE (Scottish and Southern Energy) (25.1%) and OPW (24.8%), a company jointly owned by Dutch pension administrator PGGM and Ampère Equity Fund (managed by Triodos Investment Management), are the companies behind Walney Windfarms Limited,  with DONG Energy as the leading partner in the construction and operational phases of the projects.

Anders Eldrup, CEO at DONG Energy, said:
“Walney 2 is the world’s fastest ever installation of an offshore wind farm and this accomplishment underlines DONG Energy’s position as a strong market leader within offshore wind. We developed our techniques for faster and more cost efficient installation methods in the challenging conditions in the Irish Sea. This is an important step in the continuing drive to reduce the cost of construction of offshore wind farms.”

Colin Hood, SSE’s Chief Operating Officer, said: “This is a major milestone in the development of the Walney offshore wind farms and it demonstrates the excellent progress being made on the project. As the UK’s leading generator of electricity from renewable sources, SSE is committed to helping to increase further the amount of renewable electricity generation in the UK, and the export of electricity at Walney is a step towards achieving this.”

You can read more about the background to the project at this link

 

Walney Newsletter 19 Published

The Walney Newsletter no. 19 - October 20, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk

October turbines

Here you will be able to read about:

  • Wind turbine installation at Walney 2 completed
  • New benchmarks for the construction of wind farms
  • Now it's time for commissioning
  • Armour layer

 

Walney Newsletter 18 Published

The Walney Newsletter no. 18 - September 20, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk

Offshore turbines at Walney 2

Here you will be able to read about:

  • Turbine installation for Walney 2 near completion
  • Upon completion, Walney 1 + 2 will be the world's largest offshore wind farm 
  • Walney 2 connected to the national grid
  • Exercise simulated vessel capsizing
  • Walney run marked the commissioning of Walney Offshore Windfarm 1

Click here to read the newsletter.

 

Extension to Walney Windfarm,
Public Consultation

The Walney offshore wind farm was awarded an agreement for lease to extend a further 750MW by The Crown Estate on 11th May 2010.

The proposed Walney Extension offshore wind farm development consists of an area of 149km2 and an estimated capacity of 750 MW, generating enough energy to meet the average needs of up to 657,000 homes. The project development site is located in the Irish Sea, around 19 km WSW of the Walney Island coast in Cumbria, 26 km SW from the Millom coast in Cumbria, 35 km NW from the Fleetwood and Blackpool coast, and 31 km SE from the Isle of Man.

We would like to advise you that the project team for the Walney Extension Offshore Wind Farm are holding a series of community consultation events:

Friday 9th September 2011 – 2pm-8pm, The Forum, Duke Street, Barrow-in-Furness, Cumbria LA14 1HH

Saturday 10th September 2011 – 10am-4pm, Egremont Market Hall, Market Street, Egremont, Cumbria CA22 2DF

Monday 12th September 2011 – 1pm-7pm, Middleton Parish Hall, Low Road, Middleton, Lancashire LA3 3JT

Tuesday 13th September 2011 – 2pm-8pm,
St John’s Community Hall, Cedar Square, Blackpool FY1 1BP

Thursday 15th September 2011 – 1pm-7pm, Villa Marina, Harris Promenade, Douglas, Isle of Man IM1 2HJ

These events will provide an opportunity to discuss the project plans and timescales.  The feedback obtained from the community and users of the area at these events will be invaluable in shaping our plans for the Walney Offshore Wind Farm Extension.  Everyone is welcome to attend.  The views expressed through this process really will guide the development of the project, so it is vital that as many people participate as possible.

If you require any further details about the project please go to www.walneyextension.com
or email the team on walneyextension@dongenergy.co.uk
Click here to read a pdf document ‘Statement of Community Consultation’

We look forward to welcoming you at one of our events and if you require any further information in the meantime, please do not hesitate to contact us. 

The following chart shows the location of the Walney Extension area, indicated in green, adjoining the existing Walney site.

Walney Extension Chart

The red lines show the indicative cable route options and are subject to modification and further development. Planned surveys and an Environmental Impact Assessment will result in the optimum route being developed and selected in approximately 2012 (indicative date). There are both several northern and southerly routes being considered with several landfall options.

To download a larger version of the chart please click on the link: Walney_Extension_Offshore_Chart.pdf

The grid connection will be into National Grid at their Heysham Substation. The connection point has been chosen by National Grid as the optimum point on the National Transmission System, taking into account both the power output and construction timeframe of the Offshore Wind Farm.

Benefits

The Walney Extension offshore wind farm will provide electricity to an additional 500,000 homes and will contribute to the government target of achieving 15% of total energy production from renewable sources by 2020.

DONG Energy is a world leader in the construction and operation of offshore wind farms. Please click on the following link to view all job opportunities. Careers at DONG Energy 

 

Walney Newsletter 17 Published

The Walney Newsletter no. 17 - August 22, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk

Turbines at sea

Here you will be able to read about:

  • ·         Installation of transition pieces (TP) for Walney 2 completed
  • ·         43 turbines installed in Walney 2 and 19 array cables placed
  • ·         Preparing for the energisation of Walney 2 electrical system
  • ·         Weather forecast – an important tool in the toolbox
  • ·         Onshore work diminishing

 

Walney Newsletter 16 Published

The Walney Newsletter no. 16 - July 29, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk

Walney Turbine looking downwards

Here you will be able to read about:

  • ·         Monopile installation for Walney 2 completed
  • ·         Intense installation activity
  • ·         Export cable for Walney 2 in place
  • ·         Export cable joint completed
  • ·         Onshore substation for Walney 2 ready for operation
  • ·         Marine Management Organisation and Natural England conducting licence inspection for Walney 2

 

Walney Newsletter 15 Published

The Walney Newsletter no. 15 - June 19, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk

Walney Offshore Windfarm

Here you will be able to read about:

  • ·         Walney 1 in full operation
  • ·         The project commissioning team 
  • ·         Topside for the Walney 2 transformer installed
  • ·         8 turbines installed in Walney 2
  • ·         Marine mammal observation during construction of Walney 2 Offshore Windfarm
  • ·         Boat based bird survey at Walney Offshore Windfarms
  • ·         Energy for Life – Walney Fun Run’

 

Walney Newsletter 14 Published

The Walney Newsletter no. 14 - May 19, 2011 has just

been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • ·         Jacket foundation placed and secured for the Walney 2 offshore transformer
  • ·         Export cable for Walney 2
  • ·         Ready for turbine installation in Mostyn
  • ·         Robust logistics needed to secure the intense installation process
  • ·         45 turbines in Walney 1 have generated the first power
 

 

Cable Barge Information

The cable barge is called the Stemat Spirit. It's 90m long and was berthed on the beach at Cleveleys for just the morning of the 8 May while the cable was pulled to shore. If you would like to know more about the Stemat Spirit take a look here.

This is the barge at another location, showing how it sits on the sand.

You can see lots of photos of the cable barge at Cleveleys in the Windfarm Gallery

Stemat Spirit sat on the sand

 

Installation of the off-shore sub station

Take a look at these photos which show the off-shore sub-station being transported to site for installation.

off shore sub station being transported to site at Walney

off shore sub station leaving Denmark

 

Shipping Information

As the shores at Cleveleys see more marine activity, you might be interested in a web-link that gives you information about commercial and registered vessels which are in the waters around the UK. There is a link to it elsewhere on this site, and this link takes you through the Coastwatch website based at Rossall Point.

http://ncirossallpointfleetwood.co.uk/Live-Shipping.php 

 

Walney Newsletter 13 Published

The Walney Newsletter no. 13 - April 20, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk

Here you will be able to read about:

  • ·         The five first monopiles and one transition piece installed at Walney 2
  • ·         Two new service vessels handed over to O&M
  • ·         20 turbines commissioned in Walney 1
  • ·         Walney 2 offshore substation ready for transport
  • ·         Walney 2 onshore cable

 

Update on Walney Substation

exterior shot of Walney substation

interior shot of Walney substation

The building work is almost complete now ready for placement of the highvoltage switch gear, where the export cable is connected into.

The equipment will arrive early May. Also – signalling cabling is ongoing.

Civil Construction is 93% completed, while the electrical installation is 20% completed.

Exterior shot top left

Interior shot bottom left

 

Walney Newsletter 12 Published

The Walney Newsletter no. 12 - March 21, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk, click here for the direct link to the newsletter

Here you will be able to read about:

  • ·         Half-way video of the Walney project
  • ·         18 turbines commissioned
  • ·         Monopile installation for Walney 2 is about to commence
  • ·         Wind Transporter in operation in Barrow
  • ·         Fire onboard the Pompei
  • ·         Walney 2 onshore cable

 

Walney Newsletter 11 Published

The Walney Newsletter no. 11 - February 21, 2011 has just been published on the Website of the Walney project:

www.wowind.co.uk, click here for the direct link to the newsletter

Here you will be able to read about:

  • ·         Six turbines commissioned
  • ·         Array cable installation completed
  • ·         Test of new gangway system
  • ·         First operations for Walney 2 have begun
  • ·         Foundations for Walney 2
  • ·         Layout changes from Walney 1 to Walney 2
  • ·         Walney 2 onshore cable

 

Windmills Turning at Thornton!

Red Marsh Class One collage

Collage from Class One at Red Marsh School

Windmill collage by Ellen and Callum

Windmills made by Ellen and Callum at Red Marsh School

Windmill by Jordan Wilcock at Red Marsh

Jordan Wilcocks drawing of a windmill, Red Marsh School

 

Pupils at Great Arley and Red Marsh Schools were thrilled to secure prizes for their artwork entries into the Walney Offshore Windfarm art competition, with really creative work!

With construction works going on just next to their school gate and a windmill just round the corner, it’s a good time for the children to learn about how windfarms and windmills work, where renewable electricity comes from, why we need it and where it’s used in the home.

At Red Marsh School, Class One made a superb collage of the house that they live in and all the things that we use on a daily basis and are powered by electricity, learning lots while they painted and glued! Pupils in other classes made a picture of the windmills at sea from straws and beautiful blue paper, and Jordan Wilcock drew an old fashioned windmill, just like the nearby one that we see every day at Marsh Mill!

Brittany Jade Morris at Great Arley School stole the show with her superb, working wind-turbine. A truly impressive working model – although powered by battery and not by wind power - it is a really good demonstration of a modern turbine and a very good replica! It’s now on display in the school entrance for everyone to see. You can see a clip of her turbine in action at YouTube at this link.

Brittany Jade Morris and her turbine

Brittany Jade Morris from Great Arley School and her working turbine!

Offshore windfarms are one of the new generation of green energy providers that link into the National Grid and provide power to all our houses, computers, hairdryers and TVs. There are 102 turbines in the Walney Windfarm, which is just visible to the left of the Barrow Windfarm from the Fylde Coast. They are capable of generating enough electricity for 320,000 houses – which is a lot of games consoles!

Roadworks have been ongoing for several months through Thornton and Cleveleys to lay the cable which connects the new Walney Offshore Windfarm to land at Stanah, and the corner of Trunnah/Holly Road has been disrupted on several occasions. The project partners wanted to do something that both explained to people why the roadworks are necessary in bringing clean power to the north west, and which contributed to the local schools.

Individual prizes of family tickets were very kindly donated by Farmer Parrs. As the efforts from both schools were so impressive, the £250 cash prize was split equally and a cheque presented to both Red Marsh and Great Arley School.

 

Person Required to Report on Intertidal Works at Cleveleys

Walney Offshore Windfarms require an enthusiastic and motivated person to record the works to complete the interface between the offshore and onshore cables at the promenade at Cleveleys, and who would be available to start on site straight away working predominantly at Hillhouse Industrial Estate. You don't have to be a qualified engineer, however it will require a person with a good level of common sense and logic. If that's you, send your details to jane@visitCleveleys.co.uk. Interviews will be held on Sunday 30 January 2011 at Hillhouse, so do it straight away!

 

Skills

  • Basic understanding of civil engineering works
  • Basic understanding of tides and beaches
  • High level of common sense and practicality
  • Excellent communication skills
  • Fluent in English
  • Computer Literate
  • Flexible Approach

Requirements

  • Reside close to the area of works
  • Own transport
  • Own Laptop
  • Own digital camera

Needed to start to help the Onshore Cable Installation Manager ASAP. 5 days a week. 8 till 5 basis.

During the Intertidal works, availability required 7 days a week, daylight working hours. On site as and when required.

Suit a young person looking for a way into the renewable business.

Excellent rates of pay.

 

Walney Newsletter 10 Published

Walney 1 turbines

 

Walney Newsletter no. 10 was published on January 20, 2011 on the Website of the Walney project, at this link

Here you will be able to read about:

  • ·         First power from Walney 1
  • ·         The first start of C05
  • ·         Series of test procedures
  • ·         All 51 turbines in Walney 1 installed
  • ·         Offshore cabling is in the finalising phase
  • ·         Preparing for Walney 2 in Barrow Harbour
  • ·         Onshore cabling for Walney 2

 

Create a Windmill Competition

Windmill competition poster

Create a Windmill competition launched

The intersection where Trunnah Road meets Fleetwood Road North was always going to be a challenging aspect of this project to install the cable from the windfarm in the Irish Sea to the new substation at Hillhouse Industrial Estate at Stanah.

As anyone local will already know, it's an exceptionally busy junction at the best of times, without the interruption of excavation and associated works right across the middle of the road!

The traffic issues are compounded by there being four schools on this busy corner, along with Redmarsh Industrial Estate, so the project partners thought it would be a nice gesture to run a project which would involve the school children and help them to understand why work like this is very necessary to the security of energy supply in the UK.

The Fylde Coast has had it's share of traditional windmills over the years, and there are still a few dotted around and about. This project ties history with technology and provides the opportunity to show the children of today how our modern utility services relate to those of the past.

The competition is open to the four schools on the corner of Trunnah/Fleetwood Rd North, and all the details are on the poster. (Download a Pdf file here if you would like to print one out). Prizes will be awarded to the individual winners and a cash prize to the school from which the overall winner is drawn.

Entries can be anything craft based - models, paintings, pictures, anything goes as long as it is craft based, and no computer generated work will be allowed.

Winners announced before February half term.

Good Luck!

 

 

Walney Newsletter 9 published

Walney turbine

The Walney Newsletter no. 9 - December 20, 2010 has just been published on the Website of the Walney project:

www.wowind.co.uk

Where you can read about:

  • PGGM and Ampère Equity Fund buy minority stake from DONG Energy in Walney Offshore Windfarm
  • Favorable weather conditions for installation of turbines and array cables
  • Test of new gangway system
  • O&M building under construction in Barrow
  • ”I name you Wind Transporter”
  • Activity on the harbour in Barrow
  • Walney 2 onshore cable
  • Christmas and New Year 2010

 

Progress update on Walney Onshore Substation,

currently being constructed at Hillhouse Industrial Estate

updated 15 December 2010

The new Stanah 132kv onshore substation currently being constructed at the southern end of Hillhouse Industrial Estate is part of the Walney (UK) Offshore Windfarms project to allow interconnection to the national grid, and generating a total design capacity of 183.6 MW.  

The onshore substation will include the precast concrete piles to support concrete foundations for the Control building with gas insulated switchgear, variable shunt reactor with acoustic enclosure and harmonic filter including associated HV cabling and drainage and utility services.  

The initial stages of excavation and piling construction been completed and the concrete foundation for all the structures are currently on going.

Walney substation construction

above: the excavation and preparation of piling mat platform.  

Walney substation construction

above - the completion of piling mat prior to piling operation.  

walney substation

above - the construction of precast concrete  piling operation .  

walney substation piling completed

above - piling after completion

walney substation pile muncher

above - the pile breaker machine engaged in breaking piles on site.  

walney substation

above - the excavation of GIS foundation being completed and blinded.  

walney substation

above - the concrete operation to Building control foundation (also proving we did get some snow!)

walney substation

above - the excavation and concrete blinding to formation of Shunt reactor.  

 

Walney Newsletter 8 published

The Walney Newsletter no. 8 - November 19, 2010 has just been published on the Website of the Walney project:

www.wowind.co.uk

  • Operation and maintenance organisation (O&M) is materialising
  • Operation and maintenance will comprise approx 60 people
  • Onshore substation in Heysham now online with National Grid
  • 28 Wind turbines and 11 array cables installed
  • Final splicing of the export cable
  • Radar observations of bird migration
  • Walney 2 onshore cable

 

Trench reinstatement protocol

trench being reinstated

A number of questions have been asked by residents in recent weeks regarding the discrepancies in trench reinstatement on local roads, and the protocol which is being followed in this project.

One question was why the edges of the reinstatement haven't been sealed.

It is an LCC requirement that the edges of the reinstatement aren't sealed, because sealing the edges reduces traction and creates a slip hazard. The foam concrete base layer (visible in the photo, left) provides a superior reinstatement and almost eliminates voids and thus the opportunity for water ingresss, which reduces the opportunity for freezing and expansion which couldlift the tarmac layer, and which negates the need for sealing the edges. It also protects against future subsidence and dropping of the reinstatement over the long term. There are very few other reinstatements in the area which have been carried out to the same high specification.

Throughout the route the tarmac used complies with New Roads & Street Works Act (NWRSA) specifications,although where it is newly laid it can look quite different to the existing road surface until it becomes soiled and visually blends in.

On the Thornton side of West Drive, prior to this excavation work, the road had been recently resurfaced, so under HAUCS specification a full half carriageway resurface has to be carried out to a schedule determined by LCC. Binding layer tarmac has been used prior to this being done, when the whole surface will be planed off and resurfaced in one.

The team have a good and close working relationship with LCC Highways who are on site every few days, and monitoring that their specifications and requests are being followed.

 

How the cable route was originally determined

One resident has asked, and probably others have wondered, how the route of the cable was originally decided.

In the first place, the National Grid determine where the connection can be made, which in this case is at Stanah. The turbines are in the Irish Sea, giving point A and B which need to be joined. The route which is being followed was chosen because it had been evaluated as the shortest and most optimium route from an engineering point of view, and the aim has been to stay in the publicly adopted highway all the way to create as little inconvenience to the general public as possible. It is a challenging route due to it being a residential area with many existing utilities in the roads.

The process of deciding the route involves the participation of many different stakeholders like the Environment Agency where the route crosses the beach, the local authority – in this case both Lancashire County Council and Wyre Borough Council, various landowners of privately owned areas. All the different parties are informed and consulted and relevant permissions and licenses have to be arranged to cross each different section of land. A process of public consultation is under taken for projects of this nature along with a public hearing which was held about the route before planning permission was granted back in 2008.

Planning permission 07/01032/FUL for onshore substation and onshore cable route was submitted to Wyre BC on 06.09.2007 and granted on 14.02.2008. This permission had 5 conditions, all of which have been discharged. Although condition 5 (substation surface water discharge) is currently being amended.

Some addition notes regarding why the cable route was chosen:

  1. Cable is in the existing highway for entire route.
  2. No significant impact on vegetation or habitat.
  3. No impact on biological environment during normal operation of cable.
  4. Cable route is compliant with development plan policies in relation to nature conservation.
  5. Cable route is compliant with development plan policies in relation to cultural heritage and archaeology.

 

Walney Newsletter 7 published

The latest newsletter was published on the Walney website on 19 October. Use this link where you can read about:

  • The export cable has been laid
  • Splicing of the cable cut
  • Export cable installed on the offshore transformer substation
  • Extensive test before the power can be switched on
  • First cable pull at the offshore substation
  • Increased installation activity
  • Armour stones for scour protection
  • Offshore substation for Walney 2 under construction
  • Walney 2 onshore cabling work and substation construction

 

Protocol in the event of a Service Strike

As a utility contractor, Balfour Beatty always aim for 100% avoidance of any utilities which lie in roads where they are working.

Before road works start the route is always surveyed to establish where main services lie, and then trial holes are dug to prove that the survey is correct, and then installation work can continue.

However, this isn't always a 100% accurate way or proving where services are, and particularly in residential areas individual services into houses are often found once excavation starts. In this instance, the ground would be dug out by hand to make sure that services aren't struck and supply interrupted.

A few weeks ago a power supply was unfortunately interrupted- an issue which is taken extremely seriously by Balfour Beatty with an investigation escalated right through their management chain to establish the reason and put systems in place to learn from the mistake and prevent it from happening again.

 

Getting power into the Grid

The 102 turbines of the Walney Offshore Windfarm generate electricity at 33Kv and this is stepped up in the offshore sub station way out in the Irish Sea to 132Kv, which is the voltage of our National Grid.

The electricity flows along its submarine and then land based cables to the onshore sub-station.

The National Grid itself determines where a new power supply like this can be added, and where the increase in electricity from a new supply can be joined in without an effect on the rest of the system. That’s why the electricity from the 51 turbines of Walney 1 comes into Heysham, and why the electricity from the second phase of Walney 2 has to come to Cleveleys – it’s all to do with load on the system.

In terms of the route that the cable takes from shore to sub-station, that in itself is detemined by all parties and landowners involved as a fundamental part of the planning and consultation process.

A new sub-station is being built at Hillhouse Industrial Estate to transfer the power into the Grid. It’s being built with current, state of the art technology as you would expect. It’s also a metal clad building, designed and built with elevated foundations to raise the equipment 1.5m off the floor to prevent against future risk of flooding.

The sub-station serves the purpose of filtering the electricity supply so that it is suitable to be fed into the National Grid, and it’s also a switch point where supply can be interrupted if need be. Beside the filter there is also a reactor which will compensate for the capacity of the long submarine cable (50 km in total). The reactor is like a big transformer and to prevent any noise impact on the public it will be housed in an acoustic enclosure which will attenuate the sound.

 

Safety of underground electrical cables

The process which any utility company goes through to operate a project like this is obviously very thorough and rigorous and the safety of both installers and the general public in the long term is of paramount importance.

The cables are threaded through a plastic duct in a close trefoil formation, and the ducts are bedded into sand which is thermally stable. A protection cover is laid above them and 200mm above that is a warning mesh so that anyone who comes along at a later date and digs a hole without first checking can't actually continue unaware of what lies beneath. The rest of the trench is backfilled according to local authority requirements to ensure that there is no later subsidence on the road surface.

The Walney cable is a 3 phase AC system, and because it is laid in trefoil formation (like a clover leaf) the magnetic field created by each of the phases is negated by each of the others to a very high degree. The spread of the magnetic field at the earth surface is therefore very limited because the arrangement of the cables is designed to pretty much cancel it out in the bottom of the trench - and the depth of material above it reduces the effect even further.

This is standard state-of-the-art technology which is used in all countries and cities, complying with all UK, European and international legislation and standards.

 

The seven parts of the route

The route that the cable installation follows is split into 7 sections, with each one being given a number, so that everyone can understand which piece of the project they are talking about!

Numbering starts at the Hillhouse end at the substation, working towards the sea. The ends of each section are also where two cables will be joined, so they fall just to the side of junctions to avoid having to do the jointing work at an inconvenient spot.

This is how they are numbered, to the nearest identifiable street:

Section 1:
Substation at Hillhouse going along South Road to Chequers Way

Section 2:
Chequers Way to Springbank Avenue

Section 3:
Springbank Avenue to Trunnah Gardens

Section 4:
Trunnah Gardens to just past Fairclough Road

Section 5:
Fairclough Road to Ingleway

Section 6:
Ingleway to Cleveleys Avenue

Section 7:
Cleveleys Avenue to the promenade at Thornton Gate

 

How the Onshore Cable is Laid

Preparatory works establish where other services are laid in the road, so that they can be avoided. A detection device is initially run across the road surface, and markings are added to give a broad indication of where existing surfaces lay (gas, electricity, water and telephones etc), and this gives guidance of where the clear areas are for new services to be installed.Trial holes are then dug to prove the clear area and establish the exact route.

The trench is dug with the standard mini diggers that you'll see at every set of roadworks, which cuts a neat trench in the road to the required depth and width. Plastic ducting pipe is laid in the bottom of the trench. When the duct is installed and completed along the length of the route the cable is pulled through from 'Joint Bays'. It's then joined, earthed and eventually connected to the offshore cable and able to deliver electricity into the national grid. The trench is backfilled as it is built, and the surface tarmaced over, flush to the existing road surface.  

Where Directional Drilling takes place under obstacles like the sea wall, a preliminary small drill creates a hole in a forwards direction, and then it drills the full diameter hole in reverse and pulls the duct pipe back through with it, so it's a self supporting hole with no risk of collapse.  

 

Offshore Turbine Installation

Walney Offshore Wind Turbine

The Walney Newsletter number 6 was published on 21 September 2010 on the website of the Walney project at this link:

www.wowind.co.uk

Here you can read about:

  • 13 complete turbines installed
  • Weather is king
  • Six to seven days' installation cycle
  • Average and real weather
  • Bird surveys
  • Future plans – testing of radar survey
  • Export cable
  • Onshore cable for Walney 1
  • Onshore cabling and substation construction for Walney 2
  • Walney 2

 

 
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