cable systems for hvdc power transmission · 2020-06-29 · 320 kv hvdc cable system...
TRANSCRIPT
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
Cable systems for HVDC power transmission
Hong He, René SmeetsKEMA Labs, the Netherlands
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
CONTENT
• Introduction
• Recommendations and standards
• Testing DC cable systems
• Future outlook
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nkt 525 kV HVDC XLPE cable
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
Introduction: HVDC Cable systems
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HVDC cable systems
Cables
Terminations Joints
Factory joint
Outdoor terminationGIS termination
Mass-impregnated paper-lapped cable (MI)Oil filled cable (OF)
Extruded cable (XLPE)Superconductive cable
MI DC cable: 2.2 GW at ± 600 kVXLPE DC cable: 2 GW at ± 320 kV (2015); 1 GW at ± 400 kV (2019)
Accessories
Field joint
Straight jointTransition joint
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
Recommendations and standards
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WG 21.02: Electra No. 189WG 21.01: TB 219WG B1.32: TB 496WG B1.43: TB 623
IEC 62895 DC extruded land cable systems up to 320 kV (2017)
DC cables up to 800 kV (2000) DC extruded cable systems up to 250 kV (2003)DC extruded cable systems up to 500 kV (2012)
Mechanical testing of submarine cable DC > 60 kV (2015)
JWG B4/C1.65: TB 684 Recommended voltages for HVDC Grids (2017)
WG B1.42: TB 622 Testing DC transition Joints up to 500 kV (2015)
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
• Development tests: development phase
• Type tests: demonstrate satisfactory performance characteristics of an application
• Pre-qualification test: demonstrate satisfactory long term performance of the complete cable system.
• Routine tests: by the manufacturer on each manufactured component
• Sample tests: by the manufacturer on samples at a specified frequency
• Tests after installation: demonstrate integrity of the cable system as installed.
320 kV HVDC cable system pre-qualification test @ KEMA Labs
Testing of HVDC Cable systems
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dummy loop
Transition joint
terminations
900 kVDC source discharge
unit
Repair joint
submarine cable
Land cable
factoryjoint
Land-cable
joint
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
Electrical stress in HVDC cable
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• DC cable insulation material
resistive effect
temperature dependent
Electrical stress shifts
max stress in
no-loadmax stress in
full load
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
∆����:a specified temperature drop across the insulation
Temperature in HVDC cable
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• Temperature drop across (Δ�� the insulation must be defined and controlled
Δ �
conductor temp
sheath temp
Δ�
current
A diagram of a typical 24 hours load cycle
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
Superimposed impulse withstand voltage test
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320 kV HVDC cable system type test @ KEMA Labs
resistor
800 kV DC source
current transformer
DC divider
dummy loop
joint
termination
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
Test development
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Pulse electro-acoustic method: space charge measurement @ KEMA Labs Temporary overvoltage test: superimposed oscillating switching impulse @ KEMA Labs
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
• DC cable lines: grow, especially in Europe.
Germany DC corridors
mitigate their visual impact
German corridors
DC cable system ratings/per bipole
MI cables ± 750 kV at 3000 MW (2030)
XLPE cables ± 650 kV at 2600 MW (2030)
± 800 kV at 3200 MW (2030 optimistic?)
Asia DC grids:
dominated by Overhead line ± 1100 kV12000 MW (2019)
XLPE cables ± 535 kV at 3000 MW (2020?)
Future outlook
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IEEE Spectrum
COPYRIGHTPROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks
MAIL [email protected] WEB www.promotion-offshore.net
The opinions in this presentation are those of the author and do not commit in any way the
European Commission
PROJECT COORDINATORDNV GL Netherlands B.V.Utrechtseweg 310, 6812 AR Arnhem, The Netherlands
Tel +31 26 3 56 9111
Web www.dnvgl.com/energy
CONTACT
PARTNERSDNV GL Netherlands B.V., ABB AB, KU Leuven, KTH Royal Institute of Technology, EirGrid plc, SuperGrid Institute, Deutsche WindGuard GmbH, Mitsubishi Electric Europe B.V., Affärsverket Svenska kraftnät, Alstom Grid UK Ltd (Trading as GE Grid Solutions), University of Aberdeen, Réseau de Transport d‘Électricité, TechnischeUniversiteit Delft, Equinor, TenneT TSO B.V., Stiftung OFFSHORE-WINDENERGIE, Siemens AG, Danmarks Tekniske Universitet, Rheinisch-Westfälische TechnischeHochschule Aachen, Universitat Politècnica de València, SCiBreak AB, Forschungsgemeinschaft für. Elektrische Anlagen und Stromwirtschaft e.V., ØrstedWind Power A/S, The Carbon Trust, Tractebel Engineering S.A., European University Institute, S.A., European Association of the Electricity Transmission & Distribution Equipment and Services Industry, University of Strathclyde, S.L., Prysmian, Rijksuniversiteit Groningen, MHI Vestas Offshore Wind AS, Energinet, Scottish Hydro Electric Transmission plc, SCiBreak AB
APPENDIX
© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.
DISCLAIMER & PARTNERS
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