1 super conducting fault current limiters dr geraldine bryson future networks technical manager

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Super Conducting Fault Current Limiters

Dr Geraldine Bryson

Future Networks Technical Manager

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Connecting the North West

5 million

25 terawatt

2.4 million

£8 billion of network assets

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Location

33/11kV primary substation at Bamber Bridge in Lancashire

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Bamber Bridge Primary s/s

T1

BS

33kV

T2

11kV

11/4.2kA 11/4.2kA

22/8.4kA

Site details

Transformers upgraded Switchgear rated 150MVA @ 11kV Make 19.7kA peak Break 7.87kA rms

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Bamber Bridge Primary s/s

T1

BS

33kV

T2

11kV

11/4.2kA 11/4.2kA

11 + I lim peak =18.7 I lim peak = 7.7

4.2 +I lim rms = 7.5 I lim rms = 3.3

Solution – Fit SCFCL

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Policy development

Ensure SCFCL did not reduce

reliability of existing

protection scheme

No existing policies or procedures

Ensure any faults external

to Bamber Bridge could be managed

Satisfy normal operating

parameters and not

undermine confidence in

SCFCL

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Network Protection Scheme

T1

BS

33kV

T2

11kV

Directional Directional

OC/EFUnit

Differential

OC/EF OC/EF

Bus Bar Blocking

Protection Installed

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Systems IntegrationOverview of SCFCL

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InstallationSite installation

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CommissioningSite commissioning

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Learning points (1)

Installed proof of concept

ASL proved long-term stability

Not intended to operate for a fault

Parts from Bamber Bridge used to build SPEN unit

Used our installation to make DNO ready

Commissioned for a few months only

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Learning points (2)

Issue with noise

Very cold winter

Unbalanced load

Compressor bolted to container caused excessive vibration

Design altered to bolt to concrete plinth

Inlet water temperature too cold

Unit tripped

Section A and B not equally loaded

Caused current flow through device

Caused heating and unit tripped

Re-configure network

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&QUESTIONSANSWERS

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Want to know more?

Thank you for your time and attention

futurenetworks@enwl.co.uk

www.enwl.co.uk/thefuture

0800 195 4141

@ElecNW_News

linkedin.com/company/electricity-north-west

facebook.com/ElectricityNorthWest

youtube.com/ElectricityNorthWest

geraldine.bryson@enwl.co.uk

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