DNVGL-ST-0359 Subsea Power Cables For Wind Power Plants
STANDARDDNVGL-ST-0359Edition June 2016Subsea power cables for wind power plantsThe electronic pdf version of this document found through http://www.dnvgl.com is the officially binding version.The documents are available free of charge in PDF format.DNV GL AS
FOREWORDDNV GL standards contain requirements, principles and acceptance criteria for objects, personnel,organisations and/or operations. DNV GL AS June 2016Any comments may be sent by e-mail to rules@dnvgl.comThis service document has been prepared based on available knowledge, technology and/or information at the time of issuance of this document. The use of thisdocument by others than DNV GL is at the user's sole risk. DNV GL does not accept any liability or responsibility for loss or damages resulting from any use ofthis document.
Changes – currentCHANGES – CURRENTGeneralThis is a new document.Standard, DNVGL-ST-0359 – Edition June 2016Page 3DNV GL AS
CHANGES – CURRENT . 3Sec.1Sec.2Sec.3Sec.4Sec.5General . 61.1Introduction .61.1.1 Scope and application.61.1.2 Alternative methods and procedures.71.2References and definitions .71.2.1 General .71.2.2 Standards .71.2.3 Guidelines .81.2.4 Terminology and definitions.81.2.5 Abbreviations and symbols . 15Project life cycle. 162.1General.162.1.1 Objective . 162.1.2 Application . 162.1.3 Dependability and risk based design . 162.2Preliminary design .162.2.1 Approach . 162.2.2 System analysis. 172.2.3 Conceptual design. 172.3Detailed design .182.3.1 General . 182.3.2 Cable system design. 182.3.3 Subsea power cables . 192.3.4 Cable protection design . 212.3.5 Cable interface at fixed offshore units . 222.3.6 Landfall . 24Manufacturing and testing . 253.1General.253.2Quality assurance and testing .25Transport and installation . 264.1General.264.2Cable storage .274.3Cable load-out .274.4Cable transport ting . 29Cable pull–in to offshore unit . 29Landfall . 29Cable protection . 304.6Infrastructure crossings.314.7As-built survey .314.7.1 General . 314.7.2 Survey requirements . 314.8Termination.31Commissioning . 325.1General.32Standard, DNVGL-ST-0359 – Edition June 2016Page 4DNV GL ASContentsContents
Sec.6Sec.7Testing after installation .32In-service. 336.1General.336.2Operation planning.336.3Maintenance and monitoring requirements .336.4Repair work.346.4.1 General . 346.4.2 Repair planning and execution . 34Decommissioning . 367.1General.367.2Removal process .36App. A Documentation . 37A.1 General. 37A.2 Preliminary design . 37A.3 Detailed design . 37A.4 Manufacturing and testing. 38A.5 Transport and installation . 38A.6 Commissioning . 39A.7 In-service. 39A.8 Decommissioning . 39Standard, DNVGL-ST-0359 – Edition June 2016Page 5DNV GL ASContents5.2
SECTION 1 GENERAL1.1 IntroductionSubsea power cables account for just a small portion of the total amount of investments in offshore windfarms. However, when these power cables fail, the impact typically is very significant. In order to reducethe failure risk this standard specifies the requirements to subsea power cable installations during all phasesof a subsea power cable project with a focus on evaluation of renewable energy applications in shallow waterand landfall.The objectives of this standard are to:— support developers of wind power plants and their contractors for the application of certification. It helpsto clarify requirements related to certification of subsea power cables and their accessories for offshorewind power plants— define minimum requirements and scope for third-party evaluation of the design, manufacturing,transport, installation and operation of power cable components and projects— provide a common platform for communicating the scope and extent of key activities during subseapower cable certification projects in renewable energy applications, e.g., with regard to approval byauthorities.Guidance note:Locally applicable regulations should be consulted to ensure that all requirements, which can be in excess of those provided in thisstandard, are 1.1 Scope and applicationThe scope and applicability of this standard are detailed in Table 1-1.Table 1-1 Scope and application summaryGeneralCableMaterialsProject phasesConcept development, design, manufacturing, testing, storage, load-out,transport, installation, commissioning, in-service, decommissioningComponentsPower cable, optical fibres, accessories such as joints and terminations,cable fixing and protectionCable routeTermination at offshore unit, subsea route, landfall to jointing locationGeographyWorld-wideDesign, electricalSingle-core AC, three-core AC, single-core DC, bundle of two single-core DCcables, coaxial DC cablesDesign, mechanicalStatic and dynamic applicationsDesign, opticalWith or without optical fibre packagePowerNo limitationVoltageUp to 500 kVTemperatureNo limitationDimensions(diameter, length)No limitationWater depthGeneral applicability to 100 m, application for water depths beyond 100 mwith additional considerations 1)ConductorCopper, aluminiumInsulationExtruded insulationApplication for mass impregnated cables with additional considerations. Oilfilled and gas-filled cables are excluded.Installation1)MethodNo limitationAdditional considerations may e.g. be related to cable survey corridor width or cable handling equipment.Standard, DNVGL-ST-0359 – Edition June 2016Page 6DNV GL AS
1.1.2 Alternative methods and proceduresMethods and procedures alternative to those described in this standard may be used, provided that theymeet the overall objectives, safety and quality levels specified herein and are suitable for the respectiveapplication. This shall be evaluated and agreed in each individual case.1.2 References and definitions1.2.1 GeneralThe following documents include provisions which, through specific reference in the text, constituteprovisions of this standard essential for its application.Where reference is made to documents other than DNV GL service documents, the valid revision shall betaken as the revision which was current at the date of issue of this standard.1.2.2 StandardsTable 1-2 Overview on referenced standardsStandard no.TitleIEC 60183Guide to the selection of high-voltage cablesIEC 60502Power cables with extruded insulation and their accessories for rated voltages from1 kV (Um 1,2 kV) up to 30 kV (Um 36 kV)IEC 60840Power cables with extruded insulation and their accessories for rated voltages above30 kV (Um 36 kV) up to 150 kV (Um 170 kV) - Test methods and requirementsIEC 60228Conductors of insulated cablesIEC 60287-1-1Electric cables - Calculation of the current rating - Part 1-1: Current rating equations (100% loadfactor) and calculation of losses - GeneralIEC 60287-2-1Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation ofthermal resistanceIEC 60287-3-2Electric cables - Calculation of the current rating - Part 3-2: Sections on operating conditions Economic optimization of power cable sizeIEC 60300-1Dependability management - Part 1: Dependability management systemsIEC 60793Optical fibresIEC 60794Optical fibre cablesIEC 61400-3Wind turbines - Part 3: Design requirements for offshore wind turbinesIEC 62067Power cables with extruded insulation and their accessories for rated voltages above150 kV (Um 170 kV) up to 500 kV (Um 550 kV) - Test methods and requirementsISO 9001Quality management systems - RequirementsISO 13628-5Petroleum and natural gas industries - Design and operation of subsea production systems Part 5: Subsea umbilicalsISO 14688-1Geotechnical investigation and testing - Identification and classification of soil Part 1: Identification and descriptionISO 14688-2Geotechnical investigation and testing - Identification and classification of soil Part 2: Principles for a classificationISO 19901-6Petroleum and natural gas industries – Specific requirements for offshore structures —Marine OperationsITU-T G.976Test methods applicable to optical fibre submarine cable systemsStandard, DNVGL-ST-0359 – Edition June 2016Page 7DNV GL AS
1.2.3 GuidelinesTable 1-3 Overview on referenced guidelinesDocument no.TitleAPI RP 2ARecommended Practice for Planning, Designing and Constructing Fixed OffshorePlatforms – Working Stress DesignAPI RP 2RDDynamic Risers for Floating Production SystemsCIGRÉ Technical Brochure 177Accessories for HV cables with extruded insulationCIGRÉ Technical Brochure 279Maintenance for HV cables and accessoriesCIGRÉ Technical Brochure 398Third-party damage to underground and submarine cablesCIGRÉ Technical Brochure 415Test procedures for HV transition joints for rated voltages 30 kV (Um 36 kV) up to500 kV (Um 550 kV)CIGRÉ Technical Brochure 476Cable accessory workmanship on extruded high voltage cablesCIGRÉ Technical Brochure 490Recommendations for testing of long AC submarine cables with extruded insulationfor system voltage above 30 (36) to 500 (550) kVCIGRÉ Technical Brochure 496Recommendations for testing DC extruded cable systems for power transmission at arated voltage up to 500 kVCIGRÉ Technical Brochure 560Guideline to maintaining the integrity of XLPE cable accessoriesCIGRÉ Technical Brochure 610Offshore generation cable connectionsCIGRÉ Electra 189Recommendations for tests of power transmission DC cables for a rated voltage up to800 kVDNV-OS-H102Marine Operations, Design and FabricationDNV-OS-H205Lifting Operations (VMO Standard Part 2-5)DNV-OS-H206Loadout, transport and installation of subsea objects (VMO Standard - Part 2-6)DNV-OS-J103Design of Floating Wind Turbine StructuresDNV-RP-F401Electrical Power Cables in Subsea ApplicationsDNVGL-RP-0360Subsea power cables in shallow waterGL-IV-2GL Rules and Guidelines - IV Industrial Services - Part 2 - Guideline for theCertification of Offshore Wind Turbines, Edition 2012ICPC Recommendation 3Criteria to be applied to proposed crossings between submarine telecommunicationscables and pipelines/power cablesICPC Recommendation 9Minimum technical requirements for a desktop study (also known as cable routestudy)ICPC Recommendation 11Standardization of electronic formatting of route position listsIMCA M 190Guidance for Developing and Conducting Annual DP Trials Programmes for DP VesselsIMO MSC/Circ.645Guidelines for vessels with dynamic positioning systems1.2.4 Terminology and definitionsTable 1-4 Definitions of verbal formsTermDefinitionshallverbal form used to indicate requirements strictly to be followed in order to conform to the documentshouldverbal form used to indicate that among several possibilities one is recommended as particularly suitable,without mentioning or excluding others, or that a certain course of action is preferred but not necessarilyrequiredmayverbal form used to indicate a course of action permissible within the limits of the documentStandard, DNVGL-ST-0359 – Edition June 2016Page 8DNV GL AS
Table 1-5 Definition of termsTermDefinitionabandonmentactivities associated with interrupting installation of a cable and releasing it from the cableinstallation vesselLater, installation activities continue with recovery of the cablealter course (A/C)point on the cable route where the cable course changes bearingarmour (cable)one or more cable covering(s) made of typically metal tape(s) or wire(s) providing tensilestrength and protecting the cable from external mechanical forces, see [2.3.4.3]array cablesubsea power cable connecting an offshore electricity generator with other offshore generatorsor an offshore substation within a project (e.g. an offshore wind farm)as-built surveysurvey of the installed cable system which is performed to verify the completed installation workassetterm used in the context of wind farm projects to describe the project or object to be developed,manufactured and maintained. In this standard the term refers to power cablesbightan S-shaped, U-shaped or Ω-shaped section of cableOften used for a section of cable laid on the seabed during installation or hauled on board duringa repair. See Figure 1-1r MBR(a)r MBR(b)Figure 1-1 Shapes of cable sections, top view. (a) S-shaped bight, (b) U- or Ω-shaped bightbundlea collection of cables stranded and fastened together, e.g. two or more AC, DC or fibre opticcablesburiallowering of a cable into the ground (e.g. seabed) and providing a protective cover of soilburial assessmentstudycable protection study, based on hazards to the cable (fishing, shipping, dropped objects) andsite conditions (soil properties, sediment mobility), to determine burial depth and suitable toolsfor a section of cable which meet the risk acceptance criteriaA tool capability assessment may be used to determine the likely performance includingachievable burial depthcablea cable is an assembly consisting of one or more power cores with individual or common screenand sheath, assembly fillings and covered by a common protection, (see Figure 1-2)May include packages of optical fibresConductor(Cu, Al)Optical fibres, withprotection (option)Insulation(e.g. XLPE, n/sheath(metallic)Armour beddingArmourSheath(non-metallic, option)Outer serving / sheath(non-metallic)Figure 1-2 Typical 3-phase AC subsea power cable cross-sectionStandard, DNVGL-ST-0359 – Edition June 2016Page 9DNV GL AS
Table 1-5 Definition of terms (Continued)TermDefinitioncable enginecollective term for machinery used to move cables. Includes, for instance, the following:—linear cable engine, with wheel pairs: Pairs of motor-driven wheels gripping a cable for payout or recovery. Holding force depends on the number of wheel pairs, the squeeze forceacting on the cable and the friction between wheels and cable surface—linear cable engine (tensioner), with tracks: Arrangement of e.g. two or four belts / tracksgripping a cable for pay-out or recovery. Holding force depends on track length, pad shape,the squeeze force acting on the cable and the friction between pads and cable surface. Alsoreferred to as tensioner or caterpillar—drum cable engine (capstan): A drum-shaped device for pay-out or recovery of a cable, usedespecially when large holding power is required. Fitted with a fleeting mechanism to controlthe position of the cable on the drum. Commonly used in conjunction with a draw off / holdback cable engine—draw-off / hold-back (DOHB) cable engine: Linear cable engine used in conjunction withdrum cable engines—transporter: Small cable engine with typically one or two wheel pairs for moving cablecable protectionany means protecting a cable from external mechanical forcescable protectionsystemcollective term for protective tubular elements which can be fitted onto a cable for mechanicalpro
IEC 61400-3 Wind turbines - Part 3: Design requirements for offshore wind turbines IEC 62067 Power cables with extruded insulation and their accessories for rated voltages above 150 kV (Um 170 kV) up to 500 kV (Um 550 kV) - Test methods and requirements
DNVGL-RP-F113 Pipeline subsea repair DNVGL-RP-F203 Riser interference DNVGL-RP-F204 Riser fatigue DNVGL-RP-F205 Global performance analysis of deepwater floating structures DNVGL-RP-N101 Risk management in
subsea well. More particularly, embodiments of the invention relate to methods and apparatus for Subsea well intervention operations, including retrieval of a wellhead from a Subsea well. 2. Description of the Related Art After the production of a subsea well is finished, the subsea well is closed and abandoned. The Subsea well closing pro
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Subsea Well Population and P&A Market 2015 - 2024 596 subsea wells (UK) 14 bn GBP 15 subsea wells (NCS) Campos Basin 177 subsea P&A 900 1000 1800 Idle iron initiative 900 . The use of light well intervention vessels versus drilling rigs has many pros and cons. Large operators tend to use a full service
Castrol Transaqua range -Aqueous media for Subsea Production Control & Subsea Processing applications Castrol Brayco Micronic range -Synthetic hydrocarbon media for Subsea Production Control & Subsea Processing applications Castrol Bio range -Castrol Biobar environmentally acceptable hydraulic fluids
* DNVGL Type Approval to DNVGL-ST-F101 and DNVGL-RP-F113 10. Scope of Technology Assessment Main connector based on DNVGL Type Approved gripping and sealing technology via burst test, external load te
API RP 2SK API RP 2SM API RP 2I DNVGL-OS-E301 DNVGL-OS-E302 DNVGL-OS-E303 DNVGL-OS-E304 Guidelines for Offshore Marine Operations (GOMO) MODU Mooring in Australian Tropical Waters Guidelines Page 12 of 55 3 RISK SCREENING 3.1 Introduction The purpose of this section is to provide guidance on
For generic qualification procedures for new technology and service specifications, see DNVGL-RP-A203 and DNVGL-DSS-401.These guidelines provides a specific qualification procedure for how to utilize DNVGL-RP-A203 for qualification of AM technologies. See App.C. 1.6 Definitions and abbreviations Table 1 Definitions Term Definition
