Advanced Superconducting Medium Voltage

System for Urban Area Power Supply

Mark Stemmle, Frank Merschel, Mathias Noe, Achim Hobl

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Motivation

2

Substation in

suburban area

Substation in

city center

Conventional HV

cable system

Superconducting MV

cable system

Substation in

suburban area HV

HV

MV

Substation in

city center

MV

HV

MV

AmpaCity Project Objective

3

Substation

Dellbrügge

Cable Joint

Substation

Herkules

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 specification

- 1 km distance between substations

- 10 kV system voltage

- 2.3 kA operating current (40 MVA)

AmpaCity Milestones

• Feasibility study finished in March 2011

• Project start in September 2011

• Cable system type test in February 2013

• Manufacturing and installation of system

• System commissioning test in December 2013

• Official system commissioning in April 2014

• Field test period until February 2016

4

Superconducting Cable Design

5

Dielectric Former

Screen

Outer LN2

Cooling Cable Cryostat

Inner LN2

Cooling

Phase 1 Phase 2

Phase 3

Type Test in Hannover

6

System Installation in Essen

7

Cable Commissioning Test

8

Conclusions

• Medium voltage superconducting systems

– Replace conventional HV systems in cities

– Offer technical and economical advantages

• Installation of AmpaCity system is finished

• System commissioning test was successful

• Further system evaluation through field test

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Thank you very much for your attention

Dr. Mark Stemmle

Nexans Deutschland GmbH

Kabelkamp 20

30179 Hannover

mark.stemmle@nexans.com

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