Markersbach Pumped Storage Power Plant
F2
The pumped storage plant markers Bach ( PSW marker Bach) in Saxony, with its capacity of 1050 megawatts, the second largest pumped storage power plant in Germany and is one of the largest hydroelectric power plants of its kind in Europe.
The PSW marker Bach was built 1970-1981 at marker Bach in the Erzgebirge and put into operation in 1979. 1990 and 1998 it was repaired. It consists of an upper reservoir and a lower reservoir to the power plant. The machines are available in a 44 m high cavern, which lies about 100 m below the administration building and a little below the bottom of the lower reservoir.
The power is supplied via the switchgear Röhrsdorf on the 380 kV high- voltage level in the network of the transmission system operator 50 Hertz Transmission.
Lower basin
The shut-off of the sub- basin ( Lage50.5256412.878122 ) is a 57 m high (51 m above valley floor ) and 393 m long earth dam with asphalt outer seal. It has a volume of about 920,000 cubic meters, the surface with full back is approximately 49 ha with a storage capacity of 7.7 million m³. The maximum storage capacity is 7.975 million m³. The dam is 563 m above sea level. NN. The accumulated water is the Mittweida.
Upper basin
The upper reservoir ( Lage50.50982712.868874 ) consists of a 26 m high and 2590 m long ring dam on the hilltop of the Dog Smarter to 848.4 m above sea level. NN, which was flattened during the construction of the dam. This dam is an earth dam with asphalt outer seal and 3,500,000 m³ volume building the largest dam in Saxony. He is after the dam Carl field of the second highest dam in Saxony. The surface with full back is approximately 43.6 ha with a storage capacity of about 6.5 million cubic meters.
Architectural History
Preparations
1961, the competition has been launched to identify and define the location of a new pumped storage power plant. Two years later, the choice fell on the location marker Bach, and it began the development of a basic technical concept. In 1964 the VEB Schachtbau Nordhausen first geological surveys for the construction of the sub- basin in Mittweidatal. 1966, resulted first apparent attempts at subsequent upper reservoir through the " dams Weimar ". The following year, the underground construction was decided as underground power plant with an installed power of 1000 MW by the Ministry of Coal and Energy. 1968 began the development of projects and land development. After all explorations and preliminary work had been completed, started the actual construction work. These included the establishment of building sites, construction roads and supply networks, the expansion of the station Grunstadtel and the evacuation of the village Obermittweida.
Implementation
On January 1, 1970, the general contractor VEB Kombinat took power plant construction on his work. On 1 June of the same year, work began on the auxiliary mining tunnels through the VEB Schachtbau Nordhausen on April 1, 1972, the embankments at the upper reservoir through the dam construction Weimar. Exactly one year after the sinking of shafts started by the Polish company Kopex. After the work had been completed at the stilling basin by the BMK south, the Mittweida was passed through a diversion tunnel and started the outcrop at the dam of the lower reservoir on 14 August 1973. On 28 March and 13 August 1974, the two engines water pipes were beaten on the upper basin as a pilot tunnel through the shaft sinking Nordhausen. On April 15, 1975, the embankments began on the lower reservoir through the dam construction Weimar and the seal work on the upper reservoir through the VEB Kombinat highway construction, operation part Weimar. After the outbreak had ended in the cavern on November 15, 1975, the foundation stone was laid seven days later. On 1 January of the following year, the first machines were assembled by CKD Blansko. On 6 February, the first tube was shot in the engine water pipes by IKR Bitterfeld. The following year, met on April 12, the first turbine spiral on the construction site, on April 21 began the assembly work on the switchgear by the VEB Starkstromanlagenbau Dresden and Leipzig / Halle. Exactly one year later, the lower basin was dammed for the first time. On 1 August 1978, the 380 - kV transmission line was fitted to the pumped storage power plant, transported to the site on November 1, the first 380 kV transformer. On April 21, 1979, the lower reservoir was filled for the first time and taken six days later the 380 kV switchgear in operation. After June 20, 1979, the first network circuit of the pumped storage sentence was carried out 1, 1981 was the full power of pumped storage power plant marker stream available to the grid.
Expansion from 2015
According to one from 2010 made planning the operating water level to be raised at the sub- basin to 1.49 meters and 1.71 meters in the Upper Basin. Thus, the working volume of water increased by 735,000 m³. At the same time to the turbine work to 510 MWh and the pumping work increased by 650 MWh. The construction works are planned for the period April 2015 to September 2016.