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