Substation Hoheneck
| Substation Hoheneck | ||
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 View from the country road |
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| Data | ||
| place | Ludwigsburg - Hoheneck | |
| Client | Rheinisch-Westfälisches Elektrizitätswerk | |
| Construction year | 1926 | |
| Coordinates | 48 ° 54 '48 " N , 9 ° 11' 38" E | |
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The substation Hoheneck (including substation Hoheneck , substation Ludwigsburg-Hoheneck or station Hoheneck ) is a large substation in Ludwigsburg district Hoheneck . It has the voltage levels 380, 220 and 110 kV and thus forms one of the most important nodes in the south-west German transmission network, especially in the Stuttgart region .
The Hoheneck substation was built in the 1920s as part of the north-south line of the RWE , at that time the world's longest interconnected line between the Rhineland and the Alps. In 1957, with the construction of a line to Rommerskirchen , Hoheneck became the southern end point of the first 380 kV line in Germany at the time.
A special feature of the system is that it is operated by two different transmission network operators ( Amprion and Transnet BW ).
technical structure
The facility extends over an area of around 24 hectares on the Kugelberg hill and is only about 2 km north of Ludwigsburg city center in the area of the immediately adjacent district of Hoheneck. The state capital Stuttgart is about 15 km south.
In total, there is a 380 kV switchgear with three busbars and - separated by a public road - two adjacent switchgear for 220 kV with two or three busbars and three separate switchgear for 110 kV, each with two busbars. One coupling transformer converts voltage from 380 kV to 220 kV, two more from 380 kV to 110 kV and three from 220 kV to 110 kV. The coupling lines between the system parts run partly together with the circuits leading away from Hoheneck on the same line routes.
To transport the power transformers, the system has a siding from the Backnang – Ludwigsburg railway line , which reaches the plant area from the southwest. In addition to the technical system components required for transformation, there are several service buildings, a radio relay tower and the control center of the operator Amprion on the site.
Circuit breaker of the 380 kV system
The disconnectors are painted yellow.
"Handover RWE-EVS"
the extra-high voltage transformers
Connecting track to the substation
history
prehistory
With the commissioning of the foothills control center (from 1917 golden mine ) in 1914, RWE under Hugo Stinnes developed from a regional power plant operator in the Rhineland and parts of Westphalia to a supra-regional energy supplier. Shortly after the First World War , there was an ambitious plan to connect the RWE power plants and their transmission network with the hydropower plants in the Alps .
The very first plans from May 1923 already provided for a connection to the heavily industrialized region on the central Neckar. Originally, the 220 kV line, which was still planned for 220 kV , was to begin in Meitingen near Augsburg, where a Bayernwerk substation already existed, and lead via Heilbronn and Kelsterbach to the golden mine.
As a first step in realizing this project, RWE acquired stakes in many energy supply companies in south-west Germany, such as Kraftwerk Altwürttemberg AG (KAWAG), which is owned by Großkraftwerk Württemberg AG (GROWAG), particularly in winter through the coal-fired power plant in Heilbronn KAWAG held a majority stake, produced overcapacities that could not be sold in its supply area in Württemberg. Therefore, the KAWAG network should first be connected by RWE with that of the Lechwerke in Meitingen, which often produced overcapacities with its hydropower plants on the Lech in summer. Furthermore, the connection with the power plant of Main-Kraftwerke AG in Höchst and further with the golden mine via Württemberg was easier to implement than directly from Meitingen.
In addition to electricity from GROWAG's Heilbronn coal-fired power plant and KAWAG's Pleidelsheim hydropower plant, Neckar AG , which also operated numerous hydropower plants (Neckar barrages), was to be fed into the RWE network.
With the establishment of Vorarlberger Illwerke GmbH (VIW) in November 1924 and the commitment to use the water power in Vorarlberg , Austria , the route was changed so that the network pipeline that was ultimately implemented did not begin in Meitingen, but in Bludenz .
Construction of the facility
All six substations, which should be on the line route, were planned according to a standardized circuit diagram, including Hoheneck. Siemens-Schuckertwerke was entrusted with the execution and took over the construction and the extensive deliveries of large technical equipment. The line and substation construction began in 1924. The Hoheneck substation went into operation for the first time in 1926.
In the course of the expansion of capacity at the power stations of the Schluchseewerk Group (expansion of the Hhäusern power station in 1941, the Witznau power station in 1943), an additional pipeline had to be built to supplement the north-south line in order to transport the additional capacities. By 1944, RWE therefore built the so-called Black Forest line , which, unlike the north-south line, led directly from the Tiengen substation over 120 km to Hoheneck, as well as a continuation along the Neckar and through the Odenwald to the Kelsterbach substation . One of the most important network nodes for high voltage in the RWE network was thus created in Hoheneck.
On October 5, 1957, the Rommerskirchen – Hoheneck line was put into operation as the first 380 kV line in Germany and the world's first two-circuit 380 kV line, but initially only with a 380 kV circuit.
Further development
In the 1950s, with the establishment of the RWE control center, Hoheneck developed into the central network node for the southern sub-network of RWE. A total of fourteen 220 kV substations and almost fifty 110 kV substations were controlled from there.
In addition to the connection to Rommerskirchen, another 380 kV lines were built. In 1962, the second circuit on the line from Hoheneck to Bürstadt was converted to 380 kV. In 1964 a circuit on the north-south line from Hoheneck via Herbertingen to Tiengen was converted to 380 kV. With the completion of a two-circuit 380 kV line to Dellmensingen near Ulm in 1966 and a continuation to Meitingen, the high voltage network of RWE was connected to the distribution network of Lechwerke AG. The extra high voltage network was later extended from Dellmensingen to Tyrol .
The transmission network of Energieversorgung Schwaben AG (EVS) was also connected to the Hoheneck substation, initially at the 220 kV and later also at the 380 kV level. A 380 kV line runs from Pulverdingen to Hoheneck and on to Wendlingen .
With the merger of KAWAG and GROWAG together with other regional energy suppliers to form Süwag in June 2001, plant parts became the property of this company. The parts previously operated by RWE were also transferred to RWE Transportnetz Strom GmbH in 2003 , which has been called Amprion since September 1, 2009 . In 1997, EVS merged with Badenwerk to form EnBW Energie Baden-Württemberg , whose transmission network has been run as TransnetBW since March 1, 2012 .
The former 220 kV line that ran from Tiengen via Hoheneck to the north no longer exists today. Between Hoheneck and Großgartach it was dismantled without replacement in 2004 and between Hoheneck and Aichschieß in 2007 due to its age and the redundancy that now exists. The route of the north-south line is still in operation today with the original masts, although the section from Hoheneck to the Mannheim-Rheinau substation has only been operated with one circuit since the end of 2003.
The control center, now run as the south group control line, monitors and controls the Amprion network together with the north group control line in Rommerskirchen .
