Uppenbornwerke

Overview of the plants

Uppenbornwerke refers to three hydropower plants between Moosburg an der Isar and Landshut . The decommissioned old Uppenborn plant is located on a works canal that cuts off the Isar loop near Moosburg, the Uppenborn 1 and Uppenborn 2 plants are on the Mittlere-Isar canal . They are named after Friedrich Uppenborn , who built the first large power plant here to supply Munich . The operators of the power plants are Stadtwerke München .

The Uppenborn works include the Moosburger and Echinger reservoirs , which have been part of the bird sanctuary for the Middle Isar reservoirs since 1982 .

History of the plants

Old Uppenborn factory

Weir at the Moosburg reservoir

The first power plant at the site was built on Friedrich Uppenborn's initiative between 1903 and 1907 by the Städtische Elektrizitätswerke München and opened on July 6, 1907 - three and a half months after his death. It made use of the 9 m difference in altitude of the Isar loop near Moosburg through a 4 km long canal. The output of this power plant was about 4.4 MW with a water flow of 70 m³ / s and achieved an annual production of 27 million kWh. The first 50 kV high voltage line in Germany was built in order to transfer this power, which was very high for the time, to Munich, 52 km away .

After the First World War , a transfer channel from the Amper to the Isar south of Moosburg was built in order to be able to use the water from the Amper and to better utilize the turbines. As a result, annual production rose to 34 million kWh (34 GWh).

In the years 1919 to 1925 the first section of the Middle Isar Canal was built, which absorbed a large part of the Isar water at the Oberföhring weir in Munich, thus operating three power plants and returning to it via the Sempt flood canal north of Moosburg directed the Isar and thus continued to be used by the old Uppenborn factory. In the second construction phase of the Middle Isar Canal from 1926 to 1929, it was extended, the Pfrombach power station and the Moosburg compensation pond were built, from which the water was initially directed via a short canal past the old Uppenborn power station into its underwater.

In the meantime, the Stadtwerke München had already planned to extend the Mittlere-Isar-Kanal, to route the works canal leading from the Isar to the upper water of the old Uppenborn plant as an Isar overpass past the power plant into the Mittlere-Isar-Kanal and there two new power plants - Uppenborn 1 and Uppenborn 2 - to be built in two construction phases. Since the Uppenborn 1 plant was to be used as a peak load power plant, the Echinger reservoir was required as an additional compensation basin, which at that time was called the lower compensation pond in contrast to the Moosburg (upper) compensation pond . In the first construction phase, the water at the end of the Echinger reservoir at the Hofham barrier weir ( 48 ° 30 ′ 35.2 ″ N , 12 ° 4 ′ 34.5 ″ E ) was to be evenly returned to the Isar via an outlet weir. 48.509777777778 12.07625

The Uppenborn 1 power plant, which opened in December 1930, was built on top of the plan. The old power station was now closed and shut down. To regulate the water levels and to pass through a small brook flowing along the Middle Isar Canal, a junction was built immediately in front of the mouth of the Isar overpass, with which this occasionally violently swelling brook and, if necessary, the water of the Isar overpass or the water from the Middle -Isar-Kanal can be directed into the underwater of the old Uppenbornwerk.

The second construction phase was delayed much longer than planned due to the circumstances. For this reason, the Uppenborn 2 power plant was only built between 1949 and 1951 about 8 km below the Uppenborn 1 plant.

Old power plant (closed)

The old Uppenborn power plant received the water of the Isar from the still active weir and inlet structure above Moosburg, which was conducted via the 2.2 km long works canal through the Isar loop to the power plant ( 48 ° 29 ′ 12.5 ″ N , 11 ° 58 ′ 29.6 ″ E ) and then flowed back into the Isar through the almost 2 km long underwater canal. It was shut down when the Uppenborn 1 power plant opened and is now used by the power plant as a building yard and carpentry shop. 48.486805555556 11.974888888889

Uppenborn 1

Uppenborn plant 1

Uppenborn plant 2

The Uppenborn 1 plant is located around 800 m below the Moosburg reservoir ( 48 ° 29 ′ 35.8 ″ N , 11 ° 59 ′ 52.1 ″ E ). In the brick-red main building of the power plant there are three machine sets, each consisting of a Kaplan turbine with a standing shaft and the generator above it. The turbine and generator are firmly connected to one another and rotate at 125 min ⁻¹ . Each machine set is 21 m high. The gradient is 8.8 m to 14.5 m. The generators together achieve a maximum output of 26.4 MW. On average, the power plant produces 87 million kWh (87 GWh) per year. This results in an average output of around 10 MW. The electricity generated by the generators with a voltage of 5,000 volts is converted in the switching and transformer system into electricity with a voltage of 110 kV, which is fed into the network of the distribution network operator SWM Infrastructure and flows via overhead lines to Moosburg and Munich. On the western side of the main building there is the empty section through which the water can flow past it if the power station is at a standstill. The structural systems designed by Hermann Leitenstorfer , the turbines and the generators have essentially remained unchanged since commissioning. 48.493277777778 11.997805555556

Uppenborn 2

The Uppenborn 2 power plant is 8 km below Uppenborn 1 or two kilometers below the end of the Echinger reservoir formed by the Hofham barrier weir ( 48 ° 30 ′ 55.1 ″ N , 12 ° 6 ′ 3.8 ″ E ). It is the last in the power station stairs of the Mittlere-Isar-Kanal and has a gradient of 7.7 m to 10.6 m. It is also equipped with three Kaplan turbines with a vertical shaft and a generator arranged above, which have a speed of 136.3 / min and together achieve a maximum output of 18 MW. The average energy production for one year is 76 million kWh (76 GWh), which corresponds to an average output of 8.6 MW. The grid connection takes place at the 110 kV high voltage level in the power grid of the distribution network operator SWM Infrastructure. The Uppenborn 2 plant has the task of returning the water from the Middle Isar Canal evenly to the Isar. That is why every turbine has a so-called empty firing apron, which opens automatically when the turbine comes to a standstill and then releases the same amount of water that previously flowed through the turbine. The total amount of water that flows through the power plant is regulated with the help of the two reservoirs. It flows back into the Isar about a kilometer below the power station. 48.515305555556 12.101055555556

Uppenborn 2 was remotely controlled from Uppenborn 1 from the start. In the last few years, Uppenborn 1 and Uppenborn 2, like all power plants of Stadtwerke München, have been converted to operation without supervision , in which a modern control system monitors and controls the operation of the plants fully automatically.

Canals and reservoirs

Amperüberleiter at Moosburg

Surname	length	maximum discharge
Ampere transfer	2.2 km	30 m³ / s
Isar bridge	2.4 km	70 m³ / s
Factory channel	12.0 km	240 m³ / s

Werkskanal denotes the last part of the Middle Isar Canal belonging to the Uppenbornwerke.

Surname	surface	volume
Moosburg reservoir	140 ha	3,000,000 m³
Eching reservoir	112 ha	2,000,000 m³

swell

↑ ^a ^b Federal Network Agency power plant list (nationwide; all network and transformer levels), current status on November 9, 2012. ( Microsoft Excel file, 1.6 MiB) Archived from the original on July 22, 2012 ; Retrieved November 9, 2012 .

SWM generation plants (PDF; 3.5 MB) Brochure from Stadtwerke München about the generation plants of SWM

Hencky: The expansion of the Uppenborn power plant in the city of Munich , in the commemorative publication on the occasion of the laying of the foundation stone for Uppenborn power plant 2, Echinger stage, October 22, 1949 .

Web links

Commons : Uppenbornwerke - Collection of images, videos and audio files

Map with all coordinates: OSM | WikiMap

[bnetza-1] Federal Network Agency power plant list (nationwide; all network and transformer levels), current status on November 9, 2012. ( Microsoft Excel file, 1.6 MiB) Archived from the original on July 22, 2012 ; Retrieved November 9, 2012 .