www.oceanharvesting.com Confidential Ahmed Rashid, Simulation and Control Engineer +46 768 69 62 66 [email protected]www.oceanharvesting.com Introduction to OHT and InfinityWEC Wave Energy Converter Presentation for the OceanERANET Cofund Matchmaking Event January 2019
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Introduction to OHT and InfinityWEC Wave Energy Converter
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Confidential
Ahmed Rashid, Simulation and Control Engineer+46 768 69 62 66
• Protected route for the power cable with minimized bending fatigue.
• Flexible pipe with flange mounted couplings to mooring cylinder and sea floor foundation.
A Kinetic Energy Recovery System (KERS) applied in wave energy enables the power take-off (PTO) force to be optimized in every individual wave, providing the following advantages:
1. Increased power capture and output:By advanced phase control technology (using energy storage to manage the power flowing back and forth through the PTO in every wave).
2. Improved reliability and survivability:By control of buoy motions and PTO loads, in order to avoid hard end stops and snap loads in large waves.
3. Reduced cost:By limiting the maximum force, velocity, power and stroke-length in the PTO system.
4. Increased revenues:By the integrated energy storage providing a constant, controllable and more predictable output power, and ancillary services such as frequency regulation.
5. Benefit from advanced control techniquesusing wave prediction (LIDAR), model prediction, AI and machine learning.
The InfinityWEC Solution
Kinetic Energy Recovery System (KERS):With direct drive ball nut motors connected electrically to a Teraloop flywheel energy storage.
PTO platform: Vertically fixed on top of the mooring cylinder with a lead screw.
Heave actuation system: Non-rotating ball screws moving up and down with the buoy hull.
Level actuation system: The lead screw is used for adjusting the height of the PTO platform above the mooring cylinder, to:
• Align the PTO when tidal level changes.
• Submerge the WEC in storm safety mode in extreme wave conditions.
• ORE Catapult and National Grid UK are potential partners for the project
• Investigate and understand the ancillary services market conditions and revenue mechanism in the UK electricity market
• Identify and design required energy storage capacity and configuration needed to participate in frequencyregulation services
• Possible storage configurations to investigate: ➢ On-board Teraloop flywheel with sufficient storage both for power smoothing and frequency regulation➢ On-board Teraloop flywheel only for power smoothing and on-shore Li-on battery storage for frequency regulation
• Implement an algorithm to control the exported power and stored energy with the objective to maximizerevenues from the wave energy plant
• Utilize OHT’s simulation model in conjuction with a grid emulation software or static/historical grid data, obtained from the project partners, to calculate the revenues from participating in ancillary services
Increasing Profitability by Providing Ancillary Services –Preliminary Project Scope