Submarine cables and installation - Past, present and future - - PowerPoint PPT Presentation

SLIDE 1

Submarine cables and installation

• Past, present and future technologies for interconnections

Bjørn Sanden Workshop TGEG’19, 27th June 2019

SLIDE 2

Safety

2 I

SLIDE 3

Table of content

3 I

Drivers Cables in a historical perspective Answer to the drivers Cable installation

SLIDE 4

4

Source: Enstso-e TYNDP, https://tyndp.entsoe.eu/tyndp2018/projects/

More interconnections

SLIDE 5

Offshore wind – More power

5

Source: WindEurope Annual Offshore Statistics 2018

SLIDE 6

Offshore wind – Further from shore

6

SLIDE 7

Offshore floating wind

7

SLIDE 8

Table of content

8 I

Drivers Cables in a historical perspective Answer to the drivers Cable installation

SLIDE 9

HV Cables – historical perspective (I)

9 I

1890 1890

London:

• n: first

t installa tallation tion of 10 kV e electr trical ical energy network rk for London

• n Undergro

ground und (pape per and Wax)

SLIDE 10

HV Cables – historical perspective (II)

 HVDC Gotland link (Gotland 1)

 100 kV, 20 MW

 In service in 1954 until 1986

10Source: After-service analysis of the 32-year-old HVDC cable Gotland 1,

• G. Hjalmarsson et al. Cigre session 1992

SLIDE 11

HVDC MIND cables still preferred for interconnectors

 Traditional MIND cables have

shown excellent service performance over many years

 The inherent properties of the

lapped insulation system makes it very robust  well suited for long submarine transmission links

 HVDC MIND: preferred technology

for high power transfer with proven reliability

11

SLIDE 12

HVDC MIND cables – Further development

 Nexans believe in the future of MIND

cables and continue development

 “Quick” joint for MIND cables  Deep water solutions are being developed  Nexans consolidates its leading position

by qualifying 600 kV MIND cables, with power rating exceeding 2 200 MW for bi- pole.

12

SLIDE 13

HVDC Extruded developing fast

 And, of course, HVDC extruded is

developing fast, both delivery projects and qualification status

 The joint effort by the cable community

(material suppliers, cable manufacturers, TSOs, universities...) is unprecedented

 This topic is well covered during Jicable

13

SLIDE 14

Table of content

14 I

Drivers Cables in a historical perspective Answer to the drivers Cable installation

SLIDE 15

Answers to the drivers

 Optimised solutions  Improved calculation methods

and extensive testing by the supplier industry

 optimised solutions

15

SLIDE 16

Answers to the drivers

SLIDE 17

Answers to the drivers

 Innovation

 Innovative solutions to

reduce losses

 Replace armour wires by

polymer fillers

 Significant reduction of amour

losses

 Solution will be used on

contracted project

(TKRA 245 kV 3x1x1800 mm2 AQ + 2xFO)

SLIDE 18

Answers to the drivers

 Increased power transfer  Nexans is qualifying 3-core

420 kV (PQ and TT)

 420 kV, 3x2000 mm² Al

conductor:

 Cable Ø = 300 mm  Dry weight = 126 kg/m  Wet weight = 69 kg/m  ~700 MVA transmission capacity  FO-element with 48 fibers

18

SLIDE 19

Answers to the drivers

 Floating offshore wind

 Dyanmic cables

 Wet designs?  Engineering and testing

intensive, need of standardisation

19

SLIDE 20

Table of content

20 I

Drivers Cables in a historical perspective Answer to the drivers Cable installation

SLIDE 21

• Seabed mapping
• Feasibility study
• Route design
• Engineering
• Risk management
• Planning

Cable protection

• Jetting
• Trenching
• Rock Dumping
• Near Shore
• Onshore civil works
• Onshore cable pulling
• Cable end terminations
• Jointing
• Load out
• Transport
• Laying
• Shore landing
• Repair

Installation – more than cable laying

SLIDE 22

Trenchers

22

• Trench module

e and water pumps

• Adjus

ustable ble fron

• nt and aft swor
• rds
• Vertical

ical lift iftin ing g 600 00 mm

• Horizo

zontal al adjus ustment of swor

• rd openin

ing 200 00 mm

• SWD Swor
• rd

d (Selec lectiv ive Water Distribut utio ion Swor

• rd).

d).

• HP and LP fron
• nt arm nozz

zzles les (Valv lve controll lled) d)

• LP transpor

port (Valv lve control

• lled

led)

• 2 x 420

0 KW water pumps, Pressure ure from

• m 20 to 30 bar
• 1 x 200

0 KW water pump, Pressure ure from

• m 8 to 12 bar
• Trenching module

e and water pumps

• Adjus

ustable ble fron

• nt and aft swor
• rds
• Vertical

ical lift iftin ing g 600 00 mm

• Horizo

zontal al adjus ustment of swor

• rd openin

ing 200 00 mm

• 2 x 420

0 KW water pumps

• Pressure

re from

• m 10 to 16 bar
• depende

dent of projec

• ject requirem

uirement.

CapJet 1450 CapJet 1700

Trench module e and water pumps

Adjus ustable ble swor

• rds

ds (lif ift and angle) Vertical ical lift iftin ing g 500 00 mm Fixed horiz rizon

• ntal

l openin ing between sword

• rds 270

70 mm (swor

• rd

d depende dent) Fixed water distribut ibutio ion swor

• rds

ds. LP fron

• nt nozzl

zles (fix ixed water distribu ibutio ion) Transpor port valves integra grated d in swor

• rds

Topside 1 x 240 0 HP LP water pump, p, 12 bar pressure ure @ 300m 00m3

CapJet Mini

Rockcutting module 1 x 195 kW HPU cutti tting syste tem 1 x 195 kW ejec ecto tor r syste tem 4 x wheel drive e (adjusta ustable e side to side) e) 4 x wheel individual level el adjustmen tment

Rock Cutter

SLIDE 23

Vessels

23

DP 2 Vessel for trenshing, survey, and cable installation

• LOA 110.6m
• Breadth 20.0m
• Depth 9.8m
• Max draught 7.6m
• Design draft 6.0m
• Deadweight abt. 4358 mt
• Tank capacity MDO 1 722 m3
• Tank capacity FW 1 200 m3

Elektron Polar King

DP 2 Vessel for high capacit city y cable le installat allatio ion

• Length oa incl

l . layi ying g wheel l : 118. 18.25 25 m

• Breadt

dth moulde ulded d : 32.15 15 m

• Depth moulde

ulded d : 8.00 00 m

• Draught at 9373

373 t : 5.40 40 m

• incl.
• cl. stern thrusters :

6.25 25 m

• Deadweight :

9373 373 t

• Turntab

able le capacit ity 7000t 000t

• Vessel speed :

10 kts

Skagerrak

DP2 Vessel for trenching ng, , nearshore and Array cable installati tion

Length o. a. : 87.35 7.35 m Length p. p. : 82.55 2.55 m Breadt dth : 18.00 8.00 m Depth : 4.80 80 m Depth mid 1st. deck : 6.50 50 m GT (ITC 69) : 3205 205 t NT (ITC 69) : 961 1 t GWT : 3514 14 t Transpor port / Storag age Barge ge

• Length oa incl

l . layi ying g wheel l : 100 00

• Breadt

dth moulde ulded d : 30 30

• Turntab

able le capacit ity 7000t 000ton

• n

Barge UR141k

SLIDE 24

24 I CLV Nexans Aurora

State of the art technology

CLV Nexans Aurora

SLIDE 25

25 I CLV Nexans Aurora

Type: Cable Lay Vessel Design: Skipsteknisk ST-297 CLV Class: DNV GL CABLE LAYING VESSEL, E0,SF,NAUT(AW),CLEAN(DESIGN),SPS,DYN POS(AUTRO),COMF(V3),ICE(C),BIS,BWM(T), VIBR,SILENT(E),RECYCLABLE,STRENGHTE NED(DK) Flag: Norwegian Loa: 149,90 m Bm: 31,00 m Depth Main deck: 12,80 m Max Draft: 9,0 m Halden max with 8000 t HV plus 450 t = 7,0 m DWT: 17000 t Speed: 14 kts Accomodation: 90 persons in single cabins Power: 6 x 3450 kW 720 rpm Propulsion: 3 x 3200 kW Azimuth(Stern) 2 x 3000 kW Tunnel (bow) 1 x 3000 kW Retractable Azimuth (bow)

Main particulars

SLIDE 26

Many new cable laying vessels on the market

26 I

SLIDE 27

Turnkey solutions supplier

Nexans has the inhouse capability to design and deliver turnkey solutions

Engineering /design

Type testing

Production

Transport

Land installation Marine installation

Protection 

Engineering of all required cable laying operations and cable protection work



From R&D to completely installed and commissioned cable system

Seabed

• Seabed mapping
• Fesibility study
• Route design

Services

• Engineering
• Testing
• Risk management
• Planning

Vessels

• Load-out
• Transport
• Laying
• Shore landing

Cable protection

• Jetting
• Trenching
• Rock Dumping
• Near Shore

On shore

• On shore civil works
• On shore cable pulling
• Cable end terminations
• Jointing

Additional services

• Inspection Maintenance & Repair
• Cable & Umbilical transport
• Factory support

SLIDE 28

Concluding remarks

 Safety standards positive trend  There are strong drivers for cabling solutions in the coming decades  The cable industry is responding to the drivers by developing and

testing solutions

 We are in for an interesting time!

28 I

SLIDE 29

Thank you for your attention!