Grid-connected wave test site

The EMEC grid-connected wave test site was constructed in 2003, and is ideally placed on the western edge of the Orkney mainland, at Billia Croo outside Stromness.

Subjected to the powerful forces of the North Atlantic Ocean, it is an area with one of the highest wave energy potentials in Europe with an average significant wave height of 2-3 metres, but reaching extremes of up to 18 m (the highest wave recorded by EMEC so far).

The site consists of five cabled test berths in up to 70 m water depth (four at 50 m, one deeper), located approximately 2 km offshore and 0.5 km apart. In addition to this, a near shore berth is situated closer to the substation for shallow water projects.

The five 11 kV subsea cables feed into the EMEC substation which houses the main switchgear, backup generator and communications room, and has been carefully designed to minimise visual impact. These cables feed the electricity generated by the wave energy converters testing on site directly into the national grid.

Three waverider buoys are located on site measuring the wave height, period and direction, and a purpose-built weather station provides real-time met data for the site. This data is fed into a sophisticated SCADA (Supervisory, Control and Data Acquisition) system.

The test site berths are monitored by CCTV situated at our observations point at the Black Craig - a former coastguard lookout station which has been converted to house powerful cameras for monitoring the activity out at sea. This is controlled remotely from our data centre and office facilities.

For details of the wave energy demonstration projects that have taken place at the site, visit: our wave energy clients.

Click here for an environmental description of the wave test site.