Adaption of Cable Accessories for Onshore & Offshore Substation - - PowerPoint PPT Presentation

Adaption of Cable Accessories for Onshore & Offshore Substation

MATTHIAS FREILINGER

Adaption of Cable Accessories for Onshore and Offshore Substation Matthias Freilinger Head of Sales Cable Transmission

19.10.2015 2

• Adaption for Onshore Substation
• Dry outdoor termination – optimized construction
• Dry outdoor termination – Surge Arrester included
• Dry outdoor termination – Advanced Testing
• Connex Pluggable Solutions – Combining different Worlds
• Adaption for Offshore Substation
• Connex Pluggable Solutions – Offshore certification
• Testing at Offshore platforms
• Accessories for Ultra Bendable EPR Cables

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation

Contents

19.10.2015 3

• No insulating oil, no leaking, explosion resistant
• Safe and easy installation on the ground
• Each stress cone routine tested according IEC 60840
• No scaffold necessary;
• Very cost effective solution by well known and proven electric design

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation

Dry type outdoor terminations – flexible (ESF) Advantages

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• No insulating oil, no leaking, explosion resistant
• Safe and easy installation on the ground
• Lifting on the tower using easy lifting tool
• Baseplate and support construction is 360° rotating around the

termination during lifting

• Each stress cone routine tested according IEC 60840
• No scaffold on the tower necessary; saving total project costs
• Short shut out times of the overhead lines (max 1 day for 3 phases)
• PFISTERER patented solution

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation

Dry type outdoor terminations – self supported (EST) Advantages

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• No insulating oil, no leaking, explosion resistant
• Safe and easy installation on the ground
• Mechanical part of termination installed directly on support
• Lifting and easy adjusting possible due to open base plate
• Each stress cone routine tested according IEC 60840
• No scaffold necessary; saving total project costs
• Combining mechanic stability and cost effectiveness

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation

Combining both advantages – EST for Substation Application 1

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• No insulating oil, no leaking, explosion resistant
• Safe and easy installation on the ground
• Mechanical part of termination installed directly on support
• Lifting and easy adjusting possible due to open base plate
• Each stress cone routine tested according IEC 60840
• No scaffold necessary; saving total project costs
• Combining mechanic stability and cost effectiveness
• Further cost saving as post insulator is replaced by surge arrester
• Space and cost saving potential at substation design: Only one

standard support for two components

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation

Integrated surge arrester – EST for Substation Application 2

Surge Arrester – how to integrate

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• Base plate where a surge arrester is mounted has to be on earth

potential

• Surge arresters for solid earthed systems as well as coil earthed

systems has to be considered

• Tube type surge arresters offer highest mechanical stability and

save conditions during an incident

• Cage type surge arresters offering sufficient mechanical stability,

during an incident in worst case can harm the functional design of the termination but offer cost effectiveness

• The electric influence of both, termination and surge arrester, on

each other has to be clearly understood to define a optimal combined product.

Surge Arrester – how to integrate

8 Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

• Distribution of the electric potential along metal oxide is more

homogenous

• the voltage along the upper discs is reduced by the influence of

the cable termination

• This effect gets stronger by shorter distances.
• The electric field strength along the silicone sheds at the surge

arrester normally is highest at the upper part of the surge arrester

• Depending on smaller distances towards a cable termination this

effect can be equalized or even inverse.

• Electric field strength at the cable termination is forced from the

upper part of the termination towards the lower part

• Electric field strength is higher at the side of the surge arrester by

smaller distances.

Advanced testing for higher customer benefit

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• Type- and Prequalification tests according to IEC60840 or

IEC62067 have to be performed on all cable Accessories for most Customer

• Additional material tests like the tracking and erosion test

according to IEC60587 (Third edition, 2007-05)

• Mechanical cantilever tests has been performed during the

development stage

Advanced testing for higher customer benefit

10 Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

• Salt fog withstand test according to UX LK 208 Rev. 01

and based on IEC 60507 (Second edition 1991-04), confirming the required specified salinity of 112 kg/m3 at a test voltage of 98.1 kV (170 kV / √3).

• Wet power frequency withstand voltage test according

to UX LK 208 Rev. 01, which consists on the application

• f 2,5 U0 (218kV) during 15 minutes while the test object

is under artificial rain as stated in IEC 60060-1

Cable termination

Testing: IEC 60840 and IEC 62067

Connex pluggable solutions – Combining different worlds

11

Transformer

Testing: IEC 60137 Housing: EN 50299

GIS

Testing: IEC 62271-203 Housing: IEC 62271-209

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

Full range of products satisfies the customer

12

Cover disk Dummy plug Current testing plug Protective cap Earthing and short-circuit devices Gas-insulated blind cover (only for testing) Surge arrester Earthing cap Cast resin joint

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

Offshore Substations – A total different World

13 Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

• Harsh environmental conditions:
• Salt water and salt fog
• High UV radiation
• Limited space available
• Short bending radii for cables
• Connecting sea cables with platform

cables

• Highest reliability requested (difficult to

access substation)

• Tested and Certified before sent offshore

Offshore Certification

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• Classification of materials
• Salt fog tests
• Ageing tests during UV radiation

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Inter-array cable Connection between sea cable and tower cable Connection between GIS and transformer

16

72.5 kV Joint for HV-CONNEX

• Pluggable connection

for inter-array cabling

• Fast and easy

installation with CONNEX connectors

• No oil or gas involved
• Epoxy body fully
• ffshore proved
• Connection of different

cable diameters

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

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72.5 kV Cable Termination

• CONNEX Socket and

Separable Connector

• Same system for GIS and

Transformer

• Withstanding up to 50 kA

short circuit currents

• Independent of installation

position

• In use since more than 20

years

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

Testing - Case study Borkum 2

18 Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

Test Voltage GIS Transformer Plattform Connection Test Cable

Gas insulated blind cover Pluggable bushing and Gas filled elbow joint

Testing - Case study Borkum 2

19 Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

Alpha Ventus and Borkum 2 – Pluggable Solutions on Bord

20 Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation 19.10.2015

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Ultra flexible EPR cable

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation

• EPR cables with 800 mm2 high flexible copper conductor class 5
• Pluggable joints and terminations as well as dry outdoor terminations

have been qualified

• Tests and developments
• Mechanic torque conductor connector “Sicon” has been adjusted and

tested according IEC 61238-1 (Second edition, 2003-05)

• Typetest according IEC 60840 for Um = 170 kV
• Minimize bending radii – Space saving on- and offshore
• Movement of two connected high voltage equipment possible
• Robust and flexible design (testing cables, construction site, mining)

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Thank you. Pfisterer High Voltage Cable Accessories

Matthias Freilinger – Adaption of Cable Accessories for Onshore and Offshore Substation