Location: Leicestershire
Project value: £350k
Services: Construction services, design

Our innovative technical solutions resulted in a vastly reduced project lead time and subsequently significant cost savings for the client.

Project details

Demonstrating the company’s commitment to implement more resource-efficient methods in its manufacturing process, the ‘hard-wired’ solar development will provide 30% of the site’s annual electricity demand, enabling the facility to reduce its carbon footprint and reliance on the national grid.

Green Frog Connect were responsible for the turnkey design and installation of the 11kV cable that connects the solar park to the factory, as well as an extension of the existing 11kV switchboard which allowed the solar park to be integrated into the factory’s existing network.

The project, which in part aimed to address the company’s sustainability concerns, was made technically challenging as the solar farm is located some distance from the factory itself. The existing Distribution Network Operator (DNO) metering substation supplying the factory required a generator constraint panel for the solar farm which was located two kilometres away.

In partnership with the rest of the project team, our challenge was to find a reliable solution to transfer the constraint signals to the solar park. With tight client deadlines and restrictive manufacturer availability, we designed and built our innovative technical solution in-house.

Using a fibre cable, complete with programmable converters, we were able to transform the hardwired volt free contacts via the ethernet. Our technical specialists designed and personally built the required panels mirroring each other at the remote ends. Each panel is built with an integrated supply unit with battery support should external supplies fail. We addressed any potential failure in communication by building in a watchdog for continuous monitoring to curtail generation if required to avoid tripping of any existing factory supplies.

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Location: County Durham
Capacity: 12.5MW
Project length: Seven months
Client: Airvolution Energy Ltd

Key client benefits

• Completed on time, allowing the client to meet their RoC tariff deadline.
• On budget and achieved a significant saving compared to the DNO offer.

Project details

The project comprised of the excavation and laying of two 11kV cables and telecommunication cables in a common trench from Northern Powergrid’s 66/11kV Substation to the 11kV Metered Ring Main Units, housed in the intake substation situated on the wind farm. Our services covered the design and installation of new 11kV apparatus for the Contestable Works, comprising:

• The design and installation of the 11kV substation layout.
• The 11kV switchgear and ancillary apparatus.
• Earthing design of the 11kV substation.
• The design of the 11kV cable systems and protection systems.

Located in County Durham, the greenfield site is surrounded by private agricultural land and woodland areas, and it was necessary for a short section of the cable route to pass under a river. Green Frog Connect installed this cabling in ducts using Directional Drilling techniques.

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Location: Shropshire
Capacity: 3.5MW
Project length: Six months
Client: Lightsource Renewable Energy

Key client benefits

• Completed on time allowing the client to meet their feed-in tariff deadline.
• Completed on budget despite challenging off-site cable route along A41 which went through a built-up area, and over a shallow canal bridge.

Project details

The project comprised a 5MW (export) electricity connection to a new solar park. We acted as the Independent Connections Provider and undertook the following scope of services:

• Construction of the electricity grid connection contestable works. Single 3.5MW teed connection to the SPEN distribution network, 1.2km of 11kV power cabling systems and optical fibre, new substation building with associated switchgear, auxiliary plant, and equipment.
• Construction of the balance of plant sequential switchgear comprising the installation of 11kV switchgear, substation civil works, and 0.7km of 11kV power cabling systems.

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Location: Anglesey
Capacity: 500kW
Project length: Four months
Client: Livos Energy

Key client benefits

• Project connected on time to allow the client to meet their feed in tariff deadline.

Project details

Our services comprised:

• Design, project management and construction for the new contestable works.
• Installation of 11kV metering substation.
• Associated jointing, excavation and cable pulling works.
• Project Management of non-contestable works.

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Location: Malmesbury, Wiltshire
Capacity: 7.6MW
Project length: Two months
Client: British Solar Renewables

Key client benefits

• Design approval and energisation was achieved in only two months allowing the client to meet their ROC deadline.

Project details

A 7.6MW solar park, this project was connected to the local 33kV network via teed connection 500m from the site. The substation building provided was of GRP construction. Our services comprised:

• Design, project management and construction for the new contestable works
• Installation of 33kV metering substation
• Associated jointing, excavation and cable pulling works
• Project Management of non-contestable works

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