Case Study - Wind

Watson Head (Wind)

North Lanarkshire, Scotland

Green Cat Renewables (GCR) were contracted as Clients Engineer and Electrical Designer for the Watson Head Wind Farm Project following the successful delivery of the initial scoping phase as well as the initial and revised planning applications to increase the consented maximum blade tip height to 150m from 135m.

Watson Head Wind Farm is located east of Wishaw. The wind farm development consists of the supply, delivery, erection, and commissioning of two Enercon E138 wind turbines and associated access tracks, crane hard standings, foundations, drainage systems, underground cables, and substation building.

As Clients Engineer, GCR were responsible for carrying out the discharge of planning conditions, procurement of all enabling contracts (BoP, TSA and ICP) and management of the contractors through the pre-construction and construction phase. Other responsibilities included Initial Civils Design, Grid Connection Management, Construction Supervision and Route Access Suitability.

The project was the first in Scotland and the UK to comprise of Enercon E138 turbines.

GCR, as the Electrical Designer for the project, were also responsible for the detailed electrical design of the site and the connection.

System Studies

  • Load Flow/Reactive Compensation Studies
  • Fault Levels Studies
  • Protection Co-ordination Studies
  • Earthing Design Studies
  • Turbine transformer energisation studies (P28)
  • Harmonics and Voltage Flicker (G5/5)
  • G99 compliance studies

Electrical Design

  • 33kV system
  • LV system drawings and layouts
  • Electrical equipment arrangement drawings and layouts
  • Cable routing layouts including sections and details
  • Earthing layout(s)
  • Lighting and small power layout(s)
  • I/O schedule
  • Schematic and wiring diagrams
  • Cable block diagram
  • F.O. network topology
Key Data
  • Client: Watson Head Wind Farm Ltd.
  • GCR Roles: Clients Engineer, Electrical Designer, Principal Designer
  • Power: 8.4MW
  • Turbine: 2 x Enercon E138’s
  • Tip Height: 149.38m
  • Hub Height: 81m
  • First E138’s to be built in the UK
  • 7km ICP route to Wishaw GSP
  • Energised Autumn 2023