Power your wind project with the UK’s trusted high‑voltage specialists. As an experienced wind farm electrical contractor, Powersystems delivers complete design and build services: Electrical Balance of Plant (EBoP), substations and switchgear, HV cabling and earthing, SCADA cabling, testing and commissioning, plus Independent Connection Provider (ICP) grid connections.

Why choose Powersystems for your wind farm electrical works?

• Proven national track record: Since our first wind farm in 1993. Our projects have connected 40% of all UK land‑based wind farms—that’s 1,789 turbines and 6 GW connected to the National Grid
• Deep HV expertise: 33 years’ experience in the design and installation of high‑voltage electrical infrastructure for wind farms
• ICP heritage: The UK’s first NERS accredited Independent Connection Provider (ICP) since 1997, taking projects from application to energisation

Our Wind Farm Electrical Contractor Services

Electrical Design & Engineering

• End‑to‑end electrical design for onshore wind farms, including network studies, protection coordination, and equipment specification to meet DNO/TO standards and CDM compliance

Electrical Balance of Plant (EBoP)

• We deliver the full EBoP scope—everything except the turbine supply—covering substations, switchgear, transformers, cable infrastructure, earthing systems, and SCADA cabling.

EBoP ensures a complete, integrated electrical infrastructure from the turbines to the grid interface, engineered and installed by a Powersystems your specialist HV contractor.

Grid Connection (ICP)

• As an ICP, we manage the complete grid‑connection process in line with the new NESO‑led framework—supporting your project from early applications and coordinated engagement with DNOs, TOs and NESO, through detailed design, installation, compliance with the new deliverability‑based milestones, and final energisation—ensuring your scheme progresses safely, transparently, and in line with the reformed national connection process.

Substations & Switchgear

• We design, install, and commission wind farm substations (33 kV and above), indoor/outdoor switchgear line‑ups, auxiliary supply transformers, reactive compensation, and protection & control systems

HV Cabling & Earthing

• We supply, install, and test inter‑array and feeder circuits; trenching and jointing; sheath/insulation resistance tests; VLF testing where specified. Robust earthing design, grid‑code aligned

SCADA Cabling & Integration

• Cabling supply and installation for SCADA and turbine data systems; interface coordination with the turbine supplier; commissioning support to enable reliable remote operations

Testing & Commissioning

• Comprehensive pre‑energisation testing, protection schemes verification, and commissioning services to DNO/TO requirements for safe handover

Powersystems have connected 35% of UK land-based wind farms, a total of 1,789 wind turbines.

Design‑to‑Energisation: How We Deliver

• Feasibility & Grid Strategy – initial studies, connection options, and risk planning
• Detailed Electrical Design – protection, selectivity, earthing, cable sizing, and substation layouts
• Procurement & Manufacture – vetted HV equipment suppliers; factory acceptance tests
• Construction & Installation – civil coordination, HV cabling, substation assembly, SCADA cabling, and EBoP integration
• Testing, Commissioning & Energisation – full compliance checks, site acceptance tests, and DNO witnessing
• Operations Support –

Selected Wind Farm Projects

Below are examples of completed and recent wind projects connected by Powersystems

Crystal Rig IV Wind Farm (Scotland)

• Powersystems proud to announce the successful energisation of the 132 kV substation at Crystal Rig IV Wind Farm on 22nd October 2025—a major milestone in the delivery of this significant renewable energy project.

South Kyle Wind Farm, 240 MW (Scotland)

• Powersystems energised connection and wind farm substations for Vattenfall’s 240 MW onshore wind farm spanning East Ayrshire, Dumfries and Galloway.

Pencloe Wind Farm, 81 MW (Carsphairn Forest, Scotland)

• Powersystems were awarded the design, supply, installation, testing and commissioning of HV works, including 33 kV switchgear (Siemens NX Plus), protection & control, remote control panels, and site‑wide cable testing (continuity, insulation resistance, sheath, and VLF). Commissioning programme toward 2025/26 operations.

Why Developers Choose Powersystems

• Depth and breadth in renewables: Your trusted partner in Wind, Solar, Battery, Offshore wind (onshore electrical works, Dogger Bank), Anaerobic Digestion, Hydro, Tidal, and Hydrogen—giving cross‑technology insights that de‑risk projects
• Remote & challenging locations: We are experienced delivering grid connections and EBoP in complex terrains and weather windows
• From application to energisation: Your principal single HV contractor and ICP for seamless delivery, schedule certainty, and lower interface risk

Powersystems Wind Farm Case Studies

Read the latest wind farm case studies from Powersystems in wind farms projects.

Dorenell Wind Farm Project

Powersystems were appointed as the wind farm Electrical Balance of Plant (EBoP) contractor with responsibility for the design, build, commissioning and energisation of the entire wind farm electrical infrastructure works from the 132 kV connection to the Distribution Network Operator through to the final electrical and fibre optic terminations to the Vestas V90 turbines.

Read Case Study

Download

Aikengall II Wind Farm Project

Powersystems were appointed to design, supply install, test and commission a 132 kV grid connection.

Powersystems designed, installed and commissioned one of the first point-on-wave circuit breaker controllers to be used in the UK for controlled energisation of a 132 kV grid transformer to ensure voltage dips were kept within National Grid limits when energising the transformer.

Read Case Study

Download

Wind Farm Project FAQs

FAQ 1: What does a wind farm electrical contractor deliver?

• The contractor delivers the Electrical Balance of Plant (EBoP)—substations, switchgear, transformers, cable infrastructure, earthing, and SCADA cabling—and can also act as an ICP to complete grid connection and energisation.

FAQ 2: How experienced is Powersystems in UK wind?

• Powersystems completed the 2nd commercially operated wind farm in the UK at Goonhilly, Cornwall in 1993. Since 2000, Powersystems projects have connected 35% of UK land‑based wind farms, covering 1,789 turbines and 6  GW; backed by 49 years’ HV engineering expertise.

FAQ 3: How does the grid connection process work for wind farms under NESO?

• Since NESO (the National Energy System Operator) took over electricity system operation on 1 October 2024, the UK grid‑connection process has been transformed.
• NESO has replaced the old first‑come, first‑served model with a deliverability‑based queue, prioritising shovel‑ready renewable projects that meet strict development milestones.
• Revised connection offers began rolling out in December 2025, and both transmission and distribution operators now face stronger deadlines and enforcement under Ofgem’s 2025 reform package.
• This means wind farm developers now follow a more structured, milestone‑driven process with earlier certainty on their place in the connection pipeline.

FAQ 4: Who is responsible for managing grid connection offers—NESO or National Grid?

• NESO is now the single, independent operator responsible for electricity system operation and for overseeing the grid‑connection pipeline.
• National Grid no longer performs these system‑operator functions.
• NESO’s mandate was formally established under the Energy Act 2023, with full transfer effective 1 October 2024.

FAQ 5: Have grid‑connection timelines changed?

• Yes. Under NESO’s new framework, connection timelines now depend on a project’s deliverability, readiness and milestone compliance, not on the date the application was submitted.
• NESO’s 2025 reforms aim to unlock major investment and accelerate connections for ready‑to‑build wind, solar, and storage projects.
• Ofgem’s 2025 end‑to‑end review adds tougher oversight, performance targets, and penalty mechanisms for network operators.

FAQ 6: What testing and commissioning do you provide?

• Full pre‑energisation test regimes including cable continuity, insulation resistance, sheath testing, VLF testing, and protection scheme commissioning, aligned to DNO requirements.

FAQ 7: Do you operate nationally?

• Yes—Powersystems is an employee‑owned British engineering company providing HV excellence nationwide, from simple cabling to complete wind farm substation design and build contracts.