1. Super Conducting Fault Current Limiters
Dr Geraldine Bryson
Future Networks Technical Manager

2. Connecting the North West
£8 billion of network assets
5 million
2.4 million
25 terawatt

3. Location
33/11kV primary substation at Bamber Bridge in Lancashire

4. Bamber Bridge Primary s/s Site detailsBS
33kV T2
11kV
11/4.2kA
22/8.4kA
Transformers upgraded  Switchgear rated 11kV
 Make 19.7kA peak Break 7.87kA rms

5. Bamber Bridge Primary s/s
Solution – Fit SCFCL T1 BS
33kV T2
11kV
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

6. Policy development
No existing policies or procedures
Ensure SCFCL did not reduce reliability of existing protection scheme
Ensure any faults external to Bamber Bridge could be managed
Satisfy normal operating parameters and not undermine confidence in SCFCL
Ensure the SCFCL did not reduce the reliability of the existing protection scheme at Bamber Bridge
Ensure that any faults external to Bamber Bridge could be managed according the Security of Supply Standards
Design a protection scheme that would satisfy the normal network operating parameters and would not cause spurious trips to undermine confidence in the SCFCL

7. Network Protection Scheme
Protection Installed T1 BS
33kV T2
11kV
Directional
OC/EF
Unit
Differential
Bus Bar Blocking 7

8. Systems Integration
Overview of SCFCL

9. Installation
Site installation

10. Commissioning
Site commissioning

11. Learning points (1) Installed proof of concept
Used our installation to make DNO ready
Not intended to operate for a fault
ASL proved long-term stability
Commissioned for a few months only
Parts from Bamber Bridge used to build SPEN unit

12. 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
Very cold winter
Inlet water temperature too cold
Unit tripped
Unbalanced load
Issue with noise
Compressor initially bolted to container
Caused excessive vibration
Altered design to bolt to concrete plinth
Very Cold Winter
Inlet water temperature too cold
Unit tripped
Unbalanced load
Section A and B not equally loaded
Caused current flow through device
Caused heating and unit tripped
Re-configure network
Section A and B not equally loaded
Caused current flow through device
Caused heating and unit tripped
Re-configure network

13. QUESTIONS
&
ANSWERS

14. Thank you for your time and attention
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