Seabased designs, builds and installs complete, grid-connected wave parks. These wave parks produce electricity using wave energy converters (WECs), which consist of buoys connected to linear generators placed on the seabed. The buoys move with the waves, and this motion generates power. A subsea converter makes the electricity suitable for grid use, and sea cables deliver it to the grid.
Watch Seabased wave power explained in a film by Swedish energy company Vattenfall, here
Our robust linear generator, the Seabased WEC S2.7, is very efficient at extracting power from the 1-3 meter high swell waves of the tropics. Its genius is also in its simplicity; it is made with known and well-tested materials and is mechanically simple (has few moving parts), which translates into few parts that can break.
Deployment of the WECs on the seabed protects them from extreme conditions that may occur at the surface of the sea and helps minimize required maintenance.
The encapsulated generators are anchored to the seabed using a concrete gravity mounting plate. The mounting plates are designed and dimensioned according to wave loads and seabed conditions. Seabed preparations in the form of blasting or excavations will not be necessary.
Directly driven systems have a low level of complexity at the mechanical end, but create new demands on the electrical components. The generated electric current from the individual units varies both in frequency and amplitude. In order to convert the electricity to a perfect 50/60 Hz alternating current and transmit it to the onshore grid, Seabased has developed a unique marine electrical system consisting of two different types of underwater (marine) switchgear substations.
LVMS/Low Voltage Marine Substation
Several WEC are connected to one LVMS which rectifies inverts and transforms the variable alternating current received from the wave power units to a perfect AC.
MVMS/Medium Voltage Marine Substation
In larger wave energy parks groups of LVMS are connected to one MVMS. This substation further transforms the voltage so that the electricity can be transmitted over long distances to the onshore electrical grid. The marine substations are fitted with concrete foundations and their placement on the seabed protects them from physical damage.