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GKK Etzenricht Static Inverter Hall

Etzenricht Germany

Building Uses
 - electrical
 - unused
Structural Types
 - lowrise
 - concrete

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Roof43 ftWikipedia

In this hall the first static HVDC static inverter in Germany was installed. It was used between 1993 and 1995 for the interconnection of the German with the Czech Power grid, which were operated until 1995 asynchronous.

Each static inverter consisted of 432 thyristors of Siemens type U78 S346 S34 with a maximum current capacity of 4100 Ampere.

These thyristors belonged to the beginning of the 1990ies to that designed for highest transmission rating. The maximum rate of the static inverter, which worked with 160 kV was 600 MW.

The static inverter is a back-to-back inverter, which means that both static inverters are in the same hall. The HVDC powerline between them is just approximetely a few metres long.

GKK Etzenricht was the only HVDC-back-to-back scheme in Germany which went in service. Construction of a similiar facility at Wolmirstedt for the interconnection between power grids of former East and West Gernany was stopped in 1990 as after German reunifaction the synchronisation of the power grids between former East and West Germany was planned. There are however 2 long distance HVDC power transmission schemes, which end in Germany. These are "Kontek" between Bjaeverskov in Denmark and Bentwisch in Germany and "Baltic-Cable" between Arrie in Sweden and L├╝beck in Germany.

In 1995 the power grids between Germany and Czech were synchronised and the static inverter went obsolete. The switchyard was afterwards dismantled. The static inverter is still in the hall, but unused and not operatable. It is planned to sell it to Eastern Europe.

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