Fault current limiter slides

Report
Super Conducting Fault Current Limiters
Dr Geraldine Bryson
Future Networks Technical Manager
1
Connecting the North West
£8 billion of network assets
5 million
2.4 million
25 terawatt
2
Location
33/11kV primary
substation at Bamber
Bridge in Lancashire
3
Bamber Bridge Primary s/s
Site details
33kV
T1
11/4.2kA
11/4.2kA
T2
BS
11kV
22/8.4kA
Transformers upgraded  Switchgear rated 150MVA @ 11kV
 Make 19.7kA peak Break 7.87kA rms
4
Bamber Bridge Primary s/s
Solution – Fit SCFCL
33kV
T1
11/4.2kA
11/4.2kA
T2
BS
11kV
11 + I
lim peak
4.2 +I
lim rms
=18.7
= 7.5
I
lim peak
= 7.7
I
lim rms
= 3.3
5
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
6
Network Protection Scheme
Protection Installed
33kV
T1
T2
Bus Bar Blocking
Directional
BS
Directional
11kV
OC/EF
Unit
OC/EF
OC/EF
Differential
7
Overview of SCFCL
Systems Integration
8
Site installation
Installation
9
Site commissioning
Commissioning
10
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
11
Learning points (2)
Issue with noise
Very cold winter
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
Unbalanced load
Caused current flow through device
Caused heating and unit tripped
Re-configure network
12
QUESTIONS
ANSWERS
&
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Want to know more?
e
[email protected]
www.enwl.co.uk/thefuture
0800 195 4141
@ElecNW_News
linkedin.com/company/electricity-north-west
facebook.com/ElectricityNorthWest
youtube.com/ElectricityNorthWest
e
[email protected]
Thank you for your time and attention
14

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