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EUCAS 2017 – Geneva – September 20, 2017
3LO4-05
Three years operation experience of the
AmpaCity system installation in Essen, Germany
Mark Stemmle1, Kai Allweins1, Frank Merschel2, Torsten Kugel3, Friedhelm Herzog4, Thomas Kutz5,
Jean-Maxime Saugrain6
1Nexans Deutschland GmbH, Germany, 2innogy SE, Germany, 3Westnetz GmbH, Germany,4Messer Group GmbH, 5Messer Industriegase GmbH, Germany, 6Nexans France
2 I EUCAS 2017 I 3LO4-05 I September 20, 2017
HTS cable business overview
1. Potential project identificationBidirectional communication with customer
2. Demonstrate economic attractiveness€/(kA.m) mainly matters for HTS tapes : we estimate that
25 €/(kA.m) is required to develop a significant market
(recurrent 50 M€+ projects)
3. Get technology acceptanceAddress technology reliability, maintenance, refrigeration,…
3 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Contents
AmpaCity project overview
Operational experience
Conclusion
What is next ?
4 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Motivation for AmpaCity project
Substation in
suburban area
Substation in
city center
Conventional HV
cable system
Superconducting
MV cable system
Substation in
suburban areaHV
HV
MVSubstation in
city center
MV
HV
MV
5 I EUCAS 2017 I 3LO4-05 I September 20, 2017
AmpaCity installation in Essen, Germany
Luftbild: "Darstellung aus HK Luftbilder / Karten Lizenz Nr. 197 / 2012 mit Genehmigung
vom Amt für Geoinformation, Vermessung und Kataster der Stadt Essen vom 13.02.2012"
Technical specifications
- 1 km distance between substations
- 10 kV system voltage
- 2.3 kA operating current (40 MVA)
Substation
Dellbrügge
Cable Joint
Substation
Herkules
System in continuous operation since March 10th, 2014
6 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Concentric cable design for MV applications
Dielectric
Former
Screen
Outer LN2
cooling
Cable cryostat
Inner LN2
coolingPhase 1 Phase 2 Phase 3
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Termination and joint
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System installation in substation Herkules
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Joint bay and cable pulling
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Installation in substation Dellbrügge
11 I EUCAS 2017 I 3LO4-05 I September 20, 2017
> Balancing earth capacitance
Compensation of unsymmetrical cable earth
capacitances by installing capacitors
> Cooling system optimization
Modification of vacuum pumps after freezing of
humidity and other smaller optimizations
> Control system optimization
Increase of response time after automatic reclosing
for continuous operation after HV faults
Operational experience
System in operation since commissioning without problem - only a few
minor optimizations of cooling and control system during operation
12 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Voltage and current
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Cu
rre
nt
in A
Vo
ltagein
kV
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Temperatures
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Tem
pe
ratu
re in
K
Temperature Substation Dellbrügge
Outlet Temperature Substation Herkules
Inlet Temperature Substation Herkules
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Pressures
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
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Pre
ssu
re in
bar
Pressure Substation Dellbrügge
Outlet Pressure Substation Herkules
Inlet Pressure Substation Herkules
15 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Liquid nitrogen mass flow
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520
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Mas
s Fl
ow
in g
/s
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System losses at operating temperature
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Loss
es
in W
17 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Liquid nitrogen storage tank level
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Leve
l in
%
18 I EUCAS 2017 I 3LO4-05 I September 20, 2017
3-phase short circuit current
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200 210 220 230 240 250 260 270 280 290 300 310 320Str
om
in
kA
Zeit in ms
i_L1
i_L2
i_L3
Time in ms
Cu
rren
t in
kA
19 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Temperaturverlauf während KurzschlussBetriebsbereitschaft nach kurzer Erholzeit
Betriebsparameter des Strombegrenzers
Strombegrenzer wieder einsatzbereit
Protokollierung von Strom und Spannung
All tests conducted gave expected results
The AmpaCity system operates exactly as
designed, including fault current limitation
Tests prove maturity of technology under
real grid operating conditions
Short circuit testing results
20 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Conclusion
In-grid reliability of HTS cable and FCL
demonstrated on more than 3 years
Perfomance during normal operation and short
circuits in line with expectations
Ready for commercialization !
21 I EUCAS 2017 I 3LO4-05 I September 20, 2017
What is next ? - ComEd Project (Chicago)
In 2015 Nexans was chosen as supplier for the project !
22 I EUCAS 2017 I 3LO4-05 I September 20, 2017
Thank you very much for your attention!
