A need t to push for orward t the d development of c compatible - - PowerPoint PPT Presentation

A need t to push for

• rward t

the d development

• f c

compatible joi

• ints b

between d different cable ma manuf ufactur urers

TGEG’19, Technologies for Global Energy Grid

Workshop AGP’21, Thursday 27th of June, 2019

An obs bser ervation: n: t the d demand nd for offs ffshore p power l links ks i is booming ng (data f

for E Europe pe)

88 1865 2145 3305 1000 2000 3000 4000 Length of installed HVAC offshore connections Length of installed HVDC offshore connections

EVOLUTION OF INSTALLED OFFSHORE CONNECTIONS

Before 2009 2009-2018

This demand i is associated w with:  Installation of more offshore generation  Capability of submarine links to withstand higher transit and higher voltages  Increase of the average length of each link because generation is distant from the shore (AC and DC)

18 179 75 49 197 140 50 100 150 200 250 Average length of installed HVAC offshore connections Average length of installed HVDC MIND offshore connections Average length of installed HVDC synthetic offshore connections

EVOLUTION OF AVERAGE LENGTH OF INSTALLED OFFSHORE CONNECTIONS

Before 2009 2009-2018

Workshop AGP’21, Thursday 27th of June, 2019

Be p e prepared t to face ce th the ch challe llenges r rela elated t to

• th

this g growin ing need ed

• Reduce the long periods of unavailability of the electrical link : repair capability

Challenge N°1

• To reduce :

 the loss of generated energy  the associated financial losses  the associated claims

• To ease:

 the development of long interconnectors in AC and in DC Outcome

• Overcome the limitation of production capacity of each manufacturer : need for longer links

Challenge N°2

• To develop “Compatible Joints” connecting different cable designs

regardless of the cable manufacturers, for repairing and building Solution

Workshop AGP’21, Thursday 27th of June, 2019

Majors k keys f for

• r th

the d e develo lopment of

• f com
• mpatib

ible le j joi

• ints f

for

• r

th the of e offshore cable les

Pre-study & Development tests

• Confidentiality
• Intel

ellec ectual al proper erty i y issues es

• Need for

investigation tests

• Standardization of

materials

• Design of the

joints

Cable design - Operation

• Ne

Need f for r Cigré recommendations and IEC EC s standard

• Compatibility of

the systems

• Qualification tests
• Risk on project

Schedule

• Responsibility

Maintenance

• Quali

lific icatio ion o

• f CJ
• Reduction of

repair stock

• Reduction of

repair time

• Contractual issues
• Responsib

ibilit ility af after er w warran anty y period

• d

Workshop AGP’21, Thursday 27th of June, 2019

Acti ctions t to

• be c

e con

• nsid

idered f for

• r th

the d develo lopment of

• f

com

• mpatib

ible le joi

• ints f

for

• r th

the of e offshore c cable les

 Fill the lack of Cigré recommendations on extruded compatible joints qualification (compatibility, design…).  For the new projects, TSO should ask for the development and qualification tests on compatible joints early in the Tender.  Discussion between TSO to share experience, identify opportunities to ease the development of compatible joints (ENTSO-E)

Workshop AGP’21, Thursday 27th of June, 2019

Concl clusion

• n

Compatible joints exist for HVAC underground cables

(One compatible joint has already been developed for HVAC offshore link)

Developing and qualifying compatible joints for AC and DC offshore links ? YES we can !  Capability for manufacturers to address very long link tenders  Lower downtime periods and loss of green generation  Lower stock of spare parts Outcome of such development

Workshop AGP’21, Thursday 27th of June, 2019

Thank you for your attention Questions - Discussion