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Tore Langeland24.01.2013
Technology Qualification for offshore HVDC
DeepWind 2013 - 10th Deep Sea Offshore Wind R&D Conference
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Presentation outline Introduction to Det Norske Veritas (DNV)
Building a position in power system transmission and distribution
Research and innovation in DNV
Risk based approach for development of offshore HVDC transmission technologies
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Highly skilled people across the world
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10,400employees
300offices
100countries
DNV Group
DNV KEMAEnergy &
SustainabilityDNV
Maritime Oil & GasDNV
Business Assurance
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Build and share knowledge
We invest 6% of our revenue in research and development
We take a lead role in joint industry research and development projects
Through our standards, rules, recommended practices and software solutions we share knowledge with the industry
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
5
Risk based approach for development of offshore HVDC transmission technologies
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Outline Motivation
Technology Qualification Process
Qualification Basis
Technology Assessment
Other relevant initiatives
Further work – JIP Invitation
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
7
Motivation
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
MotivationBackground
40 GW offshore wind in Northern Europe by 2020
150 GW offshore wind in Europe by 2030
Grid connection of offshore oil & gas installations
The vision of an offshore Super Grid
The challenge
To date there exists no operational experience with high capacity offshore HVDC transmission technologies
Installations far from shore and in harsh marine environments will require high focus on Reliability, Availability and Maintainability
Interoperability challenges arise with technology from multiple vendors
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Picture source: 50Herz
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
MotivationOffshore HVDC transmission
Level 1Two converter stations
Capacity less than maximal loss of infeed
Level 2Three or more converter stations
Capacity less than maximal loss of infeed
Level 3Multiple converter stations
Capacity higher than maximal loss of infeed
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Lack of relevant standards for offshore transmission
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
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Technology Qualification Process
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Qualification Process
DNV’s Definition of Qualification:
Qualification is the process of providing the evidence that the technology will function within specific limits with an acceptable level of confidence.
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Qualification Process
DNV RP-A203
First edition published in 2001
Qualification of new technologies where failure poses risk to life, property, the environment or high financial risk.
Qualification of technologies that are not new- Proven components assembled in a new way- Not covered by existing requirements and standards- Proven technology in a new environment
Developed for the offshore oil&gas industry to increase stakeholder confidence in applying new technologies.
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Qualification Process
Qualification Basis
Technology Deployment
Mod
ifica
tions
Qualification Plan
Execution of the Plan
Performance Assessment
Technology Assessment
Threat Assessment
Requirements not met or changing requirements
All requirements met
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Why do we need technology qualification?Testing is conducted according to old schemes that do not take into account new failure modes
Equipment placed in a new environment- Harsh climate- Difficult access
New approach to maintenance and repair strategy
Auxiliary systems- Control of indoor environment
Higher voltage, current and power ratings- Converter and cables
New applications- Multi-Terminal DC (MTDC)- Meshed MTDC grid
New design of major components- DC converter station and valves- Cables- DC switchgear
System behaviour- Control, protection and communication
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Increases the RISK exposure
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Added value of technology qualification for offshore HVDC
Demonstration of technology capabilities
Address stakeholder uncertainties- Maturity and uncertainty of technologies- Feasibility of offshore HVDC transmission
Address the risk exposure- Identification and categorization of
technologies w.r.t. industry experience and maturity
- Identification and understanding of failure modes and the risk picture
- Development of methods and activities to address the risks
- Overall reliability and availability of technologies and systems
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
17
Qualification Basis
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Qualification Basis
Technology specification
System description
Standards and industry practice
Maintenance and Operation strategy
Boundary conditions
Requirements specification
Reliability, Availability, Maintainability
Functional requirements
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
19
Technology Assessment
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology AssessmentTechnology breakdown Component
Purpose/description
Grid level
Main challenges
Technology categorization1. No new technical uncertainties
2. New technical uncertainties
3. New technical challenges
4. Demanding new technical challenges
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Application Area
Degree of novelty
Proven Limited field history
New or unproven
Known 1 2 3
Limited Knowledge 2 3 4
New 3 4 4
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Assessment
Based on STRI experience fromTesting, Simulation & Studies
Accredited high voltage testing for testing of major equipment according to relevant standards and customer requirements, e.g. CIGRE recommendations for MI DC cables and extruded DC cables. IEC 60840 and IEC 62067 for extruded AC cables.
Simulation of HVDC and HVAC systems using most suitable program; SIMPOW, PSS-E, PSCAD-EMTDC, DigSilent etc.
Feasibility and application studies involving users and manufacturers
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Assessment
Level 2-4 categorized offshore HVDC technologies
Fast and selective detection, location and clearing of faults in a DC grid
DC circuit breaker
Control system for MTDC
Polymer cable system (rating)
Dynamic cable system
DC Switchgear (AIS*/GIS*)
DC/DC converter
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Assessment
Level 2-4 categorized offshore HVDC technologies
Fast and selective detection, location and clearing of faults in a DC grid
DC circuit breaker
Control system for MTDC
Polymer cable system (rating)
Dynamic cable system
DC Switchgear (AIS*/GIS*)
DC/DC converter
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Technology Assessment
Level 2-4 categorized offshore HVDC technologies
Fast and selective detection, location and clearing of faults in a DC grid
DC circuit breaker
Control system for MTDC
Polymer cable system (rating)
Dynamic cable system
DC Switchgear (AIS*/GIS*)
DC/DC converter
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*AIS: Air Insulated Switchgear, GIS: Gas Insulated Switchgear Test of HVDC VSC for an offshore application at STRI high voltage laboratory (Photo: ABB)
Test of UHVDC switchgear at STRI high voltage laboratory (Photo: STRI)
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
25
Other relevant initiatives
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Relevant initiativesCigré
SC B4 - HVDC and Power Electronics- B4-52, B4-55, B4-56, B4-57, B4-58, B4-59, B4-60
SC B1 - Insulated Cables- B1.27, B1.32, B1-34, B1-35, B1.38, B1.40, B1.43
EC DG Energy
Working group for offshore/onshore grid development
NSCOGI
WG 1 Offshore Transmission Technology
ENTSO-E
Regional Group North Sea (RG NS)
IEC/CENLEC
TC 115 High Voltage Direct Current (HVDC) transmission for DC voltages above 100 kV
CLC/SR 115 High Voltage Direct Current (HVDC) Transmission for DC voltages above 100kV (Provisional)
German commission for electrical, electronic & information technologies
Technical guidelines for first HVDC grids - A European study group
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Picture source: ABB
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
27
Future work
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Joint Industry Project
Why:
Need for a faster, more efficient and more reliable deployment of offshore HVDC transmission systems.
How:
Integrating ongoing activities and experiences of different technologies in new environments with a proven method for risk management -the DNV RP-A203.
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Why DNV KEMA and STRI?DNV KEMA
Independent foundation with the purpose of safeguarding life property and the environment
More than 40 years of experience in managing risk for the offshore oil and gas sector
More than 80 years of experience in electric transmission and distribution including accredited high voltage testing facilities
The world’s second largest consulting company for wind energy projects with 30 years of wind energy experience
Leading certifying agency for offshore wind projects
Continuously running 30-40 Joint Industry Projects
STRI
Independent power system consulting company with an accredited high voltage laboratory.
Several large flexible high voltage test halls to conduct tests on products with system voltages up to 1000 kV.
Test halls for testing of pollution, snow, ice, salt, fog and rain effects as well as chambers for multiple stress, salt fog and extreme temperatures.
Experience in system studies for wind power integration and HVDC applications, including multi terminal VSC technology.
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Test of HVDC VSC for an offshore application at STRI high voltage laboratory (Photo: ABB)
© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Joint Industry Project
Scope of work- Activity 1 – Develop a Technology Qualification
procedure for offshore HVDC transmission technologies
- Activity 2 – Qualification examples- Activity 3 – Hearing process and publication
Participants- Manufacturers- Developers- Operators
Timeline- Kick off in October 2012- Industry wide hearing by Q1 2014- Final publication in Q2 2014
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Thank you for your attention!
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© Det Norske Veritas AS. All rights reserved.
Technology Qualification for offshore HVDC
24.01.2013
Safeguarding life, property and the environment
www.dnv.com
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