Location: Preston, Lancashire
Capacity: 90MW
Services: ICP, Principal Contractor, EPC, design, civil works, traffic management

Project details

With the cable route from outside the business park to the substation at over 1km long, and being the main feeder to the M6, the local highways team deemed this a highly traffic sensitive network and a critical emergency route in the event of any motorway congestion. Detailed discussions with local highways and businesses were required to ensure that traffic flow was maintained with any potential disruption minimised.

At the same time, and adjacent to the Gas Plant being constructed by Green Frog Connect, a 50MW Battery Energy Storage Plant was in development. In collaboration with this site, Green Frog Connect extended their contract to facilitate the off-site cable route for both developments which subsequently consisted of 4No 33kV circuits and corresponding pilot circuits. Working to extremely challenging timescales, an intricate program and complex traffic management plan was devised and agreed with all stakeholders. By operating continuous shift patterns, a 30% program improvement was achieved, enabling the successful energisation of the BESS site ahead of the Winter Triad trading period and ensuring essential balancing services to the National Grid during high usage periods, mitigating potential power outages.

On site as the Principal Contractor, Green Frog Connect provided full turnkey services for this gas project. Our scope of work included the design and construction of the balance of plant, including switchgear, transformers, power and control cabling for the client’s SCADA
system, security control systems and auxiliary power supplies, along with the design and construction of the civil works including ground works, reinforced concrete structures, fencing and access roads.

Following the successful sign off of the revised G99 commissioning procedure for the site’s 27 GE Jenbacher gas engines, the site was available for the client to trade and meet its Capacity Market obligations.

Our project management resulted in a 30% program improvement for the off-site grid connection cable works ensuring supplies were available ahead of the Winter Triad trading period.

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You can find more details on the project here.

Click here to watch the site develop on Youtube.

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Location: Swansea West
Capacity: 40MW
Project length: Seven months
Client: Green Frog Power

Key client benefits

• We designed and negotiated a simplified connection arrangement which saved the client in excess of £500k compared to their original arrangement.
• We diverted a private overhead line that was originally routed through the site and managed all outages to ensure that the businesses being fed did not lose supply.
• A shared electricity and gas trench for the off-site connections was coordinated to minimise costs and reduce the amount of disruption to the local community.

Time-lapse of site build

Click here to watch the site develop on Youtube.

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Location: Bridgwater, Somerset
Capacity: 6MW
Project length: Five months
Client: Green Frog Power

Key client benefits

• First of its kind project for the client delivered on time and budget.

Project details

The grid connection was via two connection points on the WPD 11kV network, with the cable terminating in a new substation at The Drove Power Station. A constraining device, with radio communications apparatus was installed and provide a volt free contact to a trip G59/2 relay. Our services included:

• EPC contractor for the design and construction of the power plant.
• 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.

This project included the first active management constraint scheme connected to the WPD network at 11kV, to maintain network security and to prevent thermal limits, voltage limits or power quality limits from being exceeded. Green Frog Trading now dispatch the plant to ensure Capacity Market events are met, and also operates on the open market providing power at times when renewable generation is low, and/or when demand is high.

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