Neuhof substation
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Location of the Neuhof substation |
The Neuhof substation is a 110 kV substation in the Neuhof district of Bad Sachsa , which was put into operation in 1985 and is connected to the Wolkramshausen substation in the former GDR via a two-circuit 110 kV three-phase line . It is therefore one of the few substations in the old Federal Republic through which electricity could be imported from the former GDR even before the Inner German Electricity Network , which was introduced after the fall of the Wall . The maximum possible import output was 40 MVA . Of this, up to 25 MVA could be fed into the West German network with the help of five rotating converters manufactured by Siemens , which made it possible to regulate the strong frequency fluctuations in the East German power grid. In addition, electrical energy was fed directly from the East German power grid into the local networks in Bad Sachsa, Walkenried , Zorge and Wieda .
The converters consisted of an asynchronous squirrel cage motor on the drive side and a rotor-fed asynchronous slip ring generator on the generator side. Both the nominal voltage of the motor and that of the generator were 10 kV. It was supplied to or removed from the local medium-voltage network operated with 20 kV via appropriate transformers. The frequency was adjusted with the help of a converter , which fed the rotor with a voltage of 600 volts via a converter transformer. At the start of the system, the asynchronous slip-ring generator was operated as a motor and started up using a conventional starter circuit. After the motor had reached its speed, the squirrel-cage rotor was switched on, which then took over the drive.
A similar converter system was also used in the Growian wind turbine to couple it to the power grid.
In April 1990 the plant was shut down and between 2003 and 2005 the converters including their auxiliary equipment were dismantled and then scrapped. The halls in which the converters were once located are still used today by Harz Energie for operational purposes.
The line to Wolkramshausen was partially dismantled and connected to a line coming from a transformer station in the west. The switchgear into which the line from Wolkramshausen once flowed is currently unused. In front of the substation is an unused 110 kV mast of East German design.
See also
literature
- Walter Schossig: 40-year hiatus ended . 10 years electrical reunification of Germany. In: ew . tape 105 , no. 21–22 , 2005, pp. 80–83 ( walter-schossig.de [PDF; accessed on August 16, 2014] reprint PDF 6090).
Web links
Coordinates: 51 ° 35 ′ 4 " N , 10 ° 34 ′ 31.1" E