Introduction to tidal energy

Tidal energy is a form of hydropower that converts the energy of tides into useful forms of power, mainly electricity.

Although not yet widely used, tidal energy has potential for future electricity generation. Tides are more predictable than wind energy and solar power. Among sources of renewable energy, tidal has traditionally suffered from relatively high cost and limited availability of sites with sufficiently high tidal ranges or flow velocities, thus constricting its total availability. However, many recent technological developments and improvements, both in design and turbine technology indicate that the total availability of tidal power may be much higher than previously assumed, and that economic and environmental costs may be brought down to competitive levels.

A feasibility study commissioned by Anglesey County Council (Feasibility Study for a Marine Energy Programme – a Marine Energy Sector Development Programme 2013) described the marine energy sector as “a major opportunity for transformational economic growth” for North Wales and recognised the importance of “supporting and encouraging local marine skills capability and supply chain capacity…to create positive regional impacts and benefits.”