Developing the PTO of the first MW-level Oscillating Wave Surge Converter

Project: EU project

Project Details


The MegaRoller project will develop and demonstrate a Power Take-Off (PTO) for wave energy converters. The PTO
is developed in conjunction with oscillating wave surge converters (OWSCs), a class of wave power technology that
uses bottom-hinged plates oscillating in pitch following the surge movement of the water particles in the nearshore
zone (10m-25m water depth). The development and demonstration of the PTO for a 1MW OWSC device is based on
multiple hardware innovations (modular design, twin drive trains, intelligent cylinders, standardized central power
unit and novel accumulator arrangement) and software innovations (wave-by-wave damping control, advanced
efficiency control, energy storage control, power smoothing and prediction). The project will therefore generate
extensive know-how in the area of PTO design and PTO control systems, with the aim to decrease the LCOE of next
generation OWSC devices below €150/MWh. The methodologies used in the project (such as wave-by-wave damping
control and prediction, standardized power units) will be applicable to many other Wave Energy Converter types and
generate new standards (algorithms) for PTO control, thus benefiting the broader ocean energy community. The fullscale
PTO will be validated in a PTO test rig available at AW-Energy in Finland, a facility allowing the consortium
to create power matrices for the wave conditions of different sites, fine-tune the PTO control algorithms, certify the
operation of the PTO and ensure that the produced electricity conforms to the various grid codes of different market
areas. In the short term, the developments will increase performance (power conversion from 70 to 88%), increase
reliability (lifetime x2, service intervals x2, O&M costs -75%), decrease costs (power density x2.8) and improve
power quality. In the long term, a 40,000 MW roll-out of MegaRoller power plants can generate 400,000 jobs by 2050
and 110M tons / year CO2 savings in Europe only.
Effective start/end date1/05/1830/04/21

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 7 - Affordable and Clean Energy

Funding category

  • EU-H2020


  • H2020-EU.3.3.2.


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