Regatta wave

Most efficient technologies for ocean waves energy generation.

We are a company with extensive experience in the field of renewable energy, which has
participated in the development of wave energy capture systems, energy from the
waves, until the current development of a high performance system, patented
called RegattaWave.

growing demand for energy

In the next decade, 45% more energy will be needed to meet the needs of the world's population.

environmental impact

Awareness of the environmental impact of fossil fuels and the consequences of climate change.

price of energy

The prices and availability of scarce fossil and nuclear fuels are a widespread and growing concern
.

Studies performed

swell

Surf

Study of wave behavior to determine the energy that can be obtained by a buoy during a period with different wave heights.

morphology

Morphology

Optimal dimensions (diameter and height) depending on wave period, wave height and bottom depth.

distribution

Distribution

Spatial distribution of waves in a defined area and the shadow or influence of a buoy downstream and to the sides of the buoy (directions parallel and normal to the waves).

floating-platform

Floating platform design

Design of the platform-tank assembly and study of its buoyancy.

capacity

Energy capacity

Analysis of the behavior of each of the buoys pulsing in different phases of the wave, as well as of the floating platform itself. Obtaining the energy captured from the wave and the annual generating capacity according to the waves.

due-dilligence

Due diligence (external verification)

Review of the numerical simulation methodology used and analysis that allows to deduce the conclusions presented therein.

Control

Maximum energy absorption is achieved when the energy harvesting device is able to resonate with the waves. This means that the frequency of the waves is close to the natural oscillation frequency of the energy harvesting system. However, sea states often change and so does the frequency of the waves, so in order to obtain maximum energy harvesting, the response properties of the device must be modified in some way to keep it in resonance. This is achieved by controlling the generator load to vary the holding force exerted on the shaft so that the stiffness and damping factors of the system are modified.
Using this method, the frequency response of the device is averaged for each sea state. Since the change of the mean period of the waves from one state to another happens in intervals ranging from minutes to hours, the device can adapt to the variation of the spectrum after averaging over a period of time.
To obtain these average values in irregular waves, the functions of time representing the physical parameters of the waves can be decomposed into their fundamental harmonics by applying the Fourier transform. The control process is performed using a variable speed solution since it has the following advantages over the fixed speed control solution:

  • The power electronics decouple the mains frequency from the generator speed.
  • Generate more energy by always being able to work at maximum power point
  • The rotor can act as a flywheel by storing or delivering energy in small amounts to minimize mechanical stress and rapid power fluctuations.
  • Easy independent control of active and reactive power.

On the other hand, the power system used is based on a permanent magnet synchronous generator (PMSG) due to the performance it brings to the system:

  • It can work at lower speeds.
  • It is more efficient because it does not consume reactive power.
  • It can operate isolated from the grid.
  • Better control of full power.
  • The use of permanent magnets eliminates slip rings and thus improves maintenance performance.

The objective of the control system should not always be to obtain the maximum response of the device to all sea states. In extreme swell conditions it is in the interest of just the opposite, i.e. to intentionally "unadjust" the device in order to reduce its movements. This is an important survival mode.

disposition-of-subgeneration

Subgeneration provision

Study of wave behavior to determine the energy that can be obtained by a buoy during a period with different wave heights.

disposition-of-overgeneration

Overgeneration provision

Optimal dimensions (diameter and height) depending on wave period, wave height and bottom depth.

security-arrangement

Safety provision

Spatial distribution of waves in a defined area and the shadow or influence of a buoy downstream and to the sides of the buoy (directions parallel and normal to the waves).

Differential advantages

  • Floating platform working as a fixed structure, but minimizing losses due to environmental disturbance (waves).
  • Highest performance: direct drive, no hydraulics
  • Seawater is used as a counterweight, without external agents.
  • Stable output shaft speed, as it integrates the movement of all buoys
  • Reduces installation and maintenance costs.
  • High power achieved by having a large number of buoys performing
  • Great potential for reducing manufacturing costs.
  • Increased production and full working period.
  • Mobility of systems
  • Configuration that allows for more stable production.

Features

  • 140 mt floating platform (configurable as two 70 mt platforms in master-slave format), 11 mt beam, 7.45 mt maximum depth and 1700Tn weight.
  • 14 buoys on each side of 7.4 meters in diameter and 4 meters high.
  • Installed capacity 4.2MW with 3740 hours of annual production (42.70% yield)
  • Total annual power:15.71 GW

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