Embed Size (px)
Citation preview
ww
w.o
cea
nh
arv
esti
ng
.co
m
Confidential
Ahmed Rashid, Simulation and Control Engineer+46 768 69 62 66
Introduction to OHT and
InfinityWEC Wave Energy ConverterPresentation for the OceanERANET Cofund Matchmaking Event
January 2019
ww
w.o
cea
nh
arv
esti
ng
.co
m
Outline
• Company Overview
• InfinityWEC - System Description and Specifications
• Road Map and Projects
• Project proposal for OceanERANET Cofund
Page 2 Copyright © Ocean Harvesting Technologies AB 2018
ww
w.o
cea
nh
arv
esti
ng
.co
m
Company Overview
Page 3 Copyright © Ocean Harvesting Technologies AB 2018
• Based in Karlskrona, Sweden.
• Focus on energy storage integration in the power take-off to smoothen captured power and to improve the power capture performance.
• Has developed several technology concepts. Extensive IP.
2008 – 2012 2013 – 2016 2017 – Novel KERS PTO concept
ww
w.o
cea
nh
arv
esti
ng
.co
m
Page 4
The riser pipe mooring system:
• Seals the hull from sea water.
• 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.
System Description
Confidential
ww
w.o
cea
nh
arv
esti
ng
.co
m
Page 5 Confidential
38
met
er f
ully
ext
end
ed
24
met
er f
ully
co
ntr
acte
d
InfinityWEC - Specifications
• 500 kW maximum continuous power output
• 2 GWh annual output (in 40 kW/m resource)
• 43 kWh total storage
• 5-meter stroke-length in heave system
• 8-meter stroke-length in level system
• 3 MN maximum dynamic PTO force
• 450 m3 buoy volume
• 120 ton total weight (excluding foundation)
ww
w.o
cea
nh
arv
esti
ng
.co
m
Collaboration Partners & Key Suppliers
Page 6 Confidential
ww
w.o
cea
nh
arv
esti
ng
.co
m
R&D Commercial rolloutTest & Demonstration Product certification
2020 2021 2022 20232017-2018 2019 2024 ->
Road Map
Page 7 Confidential
P1: Concept, system design
P3: Half scale HIL test rig for InfinityWEC PTO system
P4: Sea trials of tested PTO in complete WEC
Planning for two ~50 MW WEC arrays with customers
P5: Sea trials and certification of a full scale 500 kW InfinityWEC
Serial production of 500 kW WEC´s for array installations
P2: NWT & LCoEoptimization
ww
w.o
cea
nh
arv
esti
ng
.co
m
• Funding application to Swedish Energy Agency
• RISE responsible for validation and calibration of OHT’s Simulink model with high-fidelity CFD model in OpenFOAM
• OHT responsible for development of cost functions of components with suppliers and design optimization with the objective to minimize LCoE
• Updated system design with the optimized configuration by Sigma Energy and Marine
Page 8 Copyright © Ocean Harvesting Technologies AB 2018
P2 in Road Map: Model Validation and LCoE-based Design Optimization
ww
w.o
cea
nh
arv
esti
ng
.co
m
Page 9 Confidential
• Funding application to Horizon 2020 SME Instruments Programme and Swedish Energy Agency.
• Sigma Energy and Marine responsible for detailed design, procurements and facilitation of assembly and commissioning of the WEC PTO machinery.
• Teraloop FESS designed and build according to OHT requirements in standalone project by Teraloop, and then installed and tested in the OHT test rig.
• Test to be done by RISE Research Institute of Sweden in Lysekil Test site Skagerrak.
P3 in Road Map: Design, Build and Test of Half-Scale PTO in Dry HIL Rig
ww
w.o
cea
nh
arv
esti
ng
.co
m
Project Proposal to OceanERANET Cofund –”Increasing Profitability by Providing Ancillary Services”
Page 10 Copyright © Ocean Harvesting Technologies AB 2018
The increased penetration of renewable energy leads to the deterioration of the quality of the grid frequency!
Traditional regulation providers are slow and inaccurateat responding to regulation requests.
Coal plant regulation control accuracy (Kirby, 2004)
There is a need for close to real-time grid frequency response!
System operators in several markets have been changing theirregulation policies and products to respond to the needs of the grid.
➢ PJM split the frequency regulation signal into two: one slow-responding and one fast-responding
➢ National Grid has been performing trials to move the regulation services procurement close to real-time
Moving procurement to near real-time has created opportunities for renewables to access the frequency response market!
➢ Large wind and solar power utilities have already made large investments in integrating battery storage in their systems
➢ Large utility scale installations with combined wind, solar and battery storage, have been installed or are planned to be installed.
How Many MW of Conventional Regulation Resource Could 1 MW of Fast Regulation Replace? (Makarov, 2008)
ww
w.o
cea
nh
arv
esti
ng
.co
m
• Storage requirements using InfinityWEC as example:
– 4 MW peak input power to the storage
– 32 kWh of storage capacity for 500 kW of continuous output with 105% PtA in the design sea-state
– 1.1 million full charge-discharge cycles with 32 kWh storagecapacity in 20 year design life time
– 125 kWh of storage capacity for 15 min frequency regulation
• Batteries have high specific energy (Wh/kg), but very lowspecific power (W/kg) and very low number ofcharge/discharge cycles
– cannot be used on-board the WEC for power smoothing
– can be used on shore for frequency regulation with smoothpower input from the array
• Supercapacitors have high specific power and relatively highnumber of charge/discharge cycles, but quite low specificenergy
– cannot provide the required storage capacity and requirednumber of full charge/discharge cycles at the same time
Page 11 Copyright © Ocean Harvesting Technologies AB 2018
Increasing Profitability by Providing Ancillary Services –Storage requirements and technology alternatives
• Teraloop’s flywheel technology meets the storage requirements for InfinityWEC very well!
– outer ring hub less flywheel rotor with integrated motor
– magnetic levitation system with electromagnetic stabilization
– wear and fatigue points eliminated, providing outstanding cycle lifetime and efficiency
– wide diameter rotor provide very high energy storage capacity per unit mass, and possibility for high power rating
– can be used on-board both for power smoothing and frequency regulation
Prototype by Finish company TeraLoop
ww
w.o
cea
nh
arv
esti
ng
.co
m
Page 12 Copyright © Ocean Harvesting Technologies AB 2018
• 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
ww
w.o
cea
nh
arv
esti
ng
.co
m
Thank you!
Page 13 Confidential
