Grange to Llynfi 66kV Catenary Survey

Surveying next to reservoir


Weston Power were seeking to increase the capacity on its 66kV network in South Wales.

LDT were engaged by Jacobs Engineering UK to undertake a catenary survey to determine the feasibility of increasing the capacity on the Grange to Llynfi circuit.

In order to determine conductor sag, a detailed topographic survey was needed.

Each span of the line was surveyed as well as the attachment points of each structure. To accurately determine the circuit load, climatic conditions needed to be recorded at the time of the survey.

This included wind speed and direction, ambient temperature, solar radiation and atmospheric pressure.

We used a combination of RTK GNSS, Total Station and 3D laser scanner to conduct the survey. As part of the line was on the Port Talbot Steel Works, enhanced risk assessments and method statements were required to ensure the safety of all involved in the project.

Deliverables included a 3D CAD model of the line, weather report, and a classified 3D point cloud