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As part of the Beauly-Denny transmission line regeneration project Alstom Grid were tasked with the design and build of a new substation for Scottish Power. This substation, known as Denny North and located 2km Northeast of Dunipace, is to accommodate 400kV and 275kV AIS switchgear and become an integral part of the new 400kV transmission line network. Kelvin Energy were employed by Alstom Grid to design and supply aluminium and steel structures.   Upon award of the contract Kelvin Energy asked to accelerate their design and supply contract to accommodate the condensed construction programme. This required careful planning for the design and manufacturing phase of the project. To assist Alstom in meeting their programme deadlines Kelvin engineers produced concept designs and provided interface loading information to allow the civil design to be undertaken ahead of schedule. The design of the aluminium structures had to take into account the reduced manufacturing time allowed for within the construction program so to assist with this the structures were based on a modular uniform cross section approach. The modular approach reduced both the manufacturing time and also the assembly time on site and along with the manufacturing programme produced in consultation with Alstom, Kelvin energy  were able to deliver over 360 aluminium support structures to site on time. All structures on the 275kV and 400kV sites have been erected and equipment installation is ongoing.  As one of the first Alstom Grid projects to include 400kV aluminium equipment support structures this project was a landmark step for Alstom Grid. Kelvin Energy was able to provide in depth knowledge on aluminium design and fabrication and used their experience to assist Alstom engineers with their transition from steel support structures to aluminium. Being able to offer expert advice and assist with all manner of substation interface issues has ensured that Alstom Grid has returned to Kelvins for the neighbouring sites at Bonnybridge and Longannet. Throughout the delivery and erection phase Kelvin Energy were able to have Project Managers from the Perth office attend site on a regular basis ensuring that all delivery, programming and installation issues were dealt with personally on site. This ensured that the Alstom site representatives had confidence in the product being delivered and that potential issues with their contractors were addressed at the earliest opportunity. 
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National Grid, under The South East Electricity Substation Alliance, undertook the regeneration of Newcross substation to meet the ever increasing demand within the Central London areas. As part of this Kelvin Energy was employed  by Alstom Grid to undertake the design and supply of 275kV GIS support structures platforms and associated steelwork.   Kelvin Energy has numerous years’ experience dealing with overseas GIS equipment manufacturers such as  Alstom, BHT and SEH and was able to utilise this expertise to develop a variety of solutions for a site which contained a number of different challenges. Kelvin Energy attended regular design meetings with Alstom Grid to discuss various interface issues and worked closely with the cable designers to ensure the most feasible solution was achieved. During these design meetings it was possible to discuss site constraints and equipment access requirements which assisted in the development of the bespoke solutions.   The Newcross redevelopment has been through many phases over the past few years and Kelvin Energy has supplied over 200 tonnes of support structures and access platforms to date with the redevelopment set to continue for a number of years yet.   Kelvin Energy have always prided themselves on the ability to offer bespoke structural solutions which address all the necessary site specific equipment and interface issues which arise. Newcross was another example where the client relied heavily on this knowledge and was greatly appreciative of the front end design interfaces Kelvin Energy were able to offer. 
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Kelvin Power Consultants won the order for the design and supply of aluminium structures to Western Power Distribution, Lincoln Main Substation Project. The structures were delivered over two phases of site works, and in total some 61 structures delivered to site on time. All structures for this site have been erected and equipment installation is ongoing. Kelvin Power Consultants had to design structures to fit the specific constraints of the site, in particular to fit into the existing foundations.
Project details
The client on this project was Powerteam, a subsidiary company of Vinci Energies, appointed by SSE Power Distribution, Transmission Department The project involved the provision of Planning drawings, full Civil and Primary Electrical design and the Design and supply of all required Structures for a new 275/132kV Supergrid Open Busbar Substation in the Sutherland area of Scotland. The project was required to accommodate the new transmission connections from Strathy North and South Wind Farms and design was also to support future expansion of a further SGT and associated equipment to connect Strathy Wood Wind Farm. Civil design included the provision of Planning drawings, Ground Investigation, Plant and Equipment foundation design and full road, compound and drainage design. Civil design also involved a strong link with environmentalists to ensure protection of flora and fauna was optimised. Eco friendly solutions were also developed for the substantial peat retention bunds required Interface was required with 3rd Party designers, namely, the Substation Control Building designers and Transmission and Distribution Overhead line designers. These interfaces required compatible designs to be agreed for siting of building and cable installations to the Control Rooms and also Access roads, crane pads and piling platforms to be designed to accommodate the Transmission tower works. Primary Plant Layout and design was developed closely with Powerteam to accommodate their preferred, and SSE Issued plant and equipment. Design included, busbar and clamp design, fire pool studies, Safety clearance checks, earthing layout, multicore cable routes and design loadings Over 130 Aluminium 132kV and 275kV Support Structures were designed and supplied including single and three-phase structures, varying from 2.1m to 7.2m high and 2 No Double Bay 12m high Galvanised steel gantries to accommodate the incoming downleads from the new Transmission Tower connections. All structures were designed to accommodate the various earth connection points and equipment mounting interfaces specific for each item of equipment. Fabrication of the structures was to an agreed delivery programme with Powerteam. Due to a compressed programme of works, close contact was maintained with the Civil Contractor throughout the project to ensure specification and programme deliverables were met. All Structures were delivered and erected to meet Powerteam’s accelerated programme. All remaining primary works were completed on programme
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