Press Officer, CEZ---------------------------------Dlouhe Strane fulfils several important functions in the power system – static, dynamic and compensational. The static role of the plant is fulfilled through transformation of surplus energy in the system into peak energy – at the time when thee is a surplus of energy in the system (mostly during the night), the water is pumped from the lower reservoir into the upper one, and in peak periods, when a shortage of energy occurs, the plant is switched to a turbine mode and it produces electricity. The dynamic function (dynamic functions, or ancillary services) of the pumped-storage power plant means that the plant functions as a backup output for the system, it can produce regulatory output and evergy and thus it contributes to the administration of the system frequency. The compensational mode of operation serves for regulating the voltage of the system. The power system must keep at disposal just as much electricity as needed at every moment, that is even at times when electricity consumption varies during the day and in longer periods as well. The construction of the plant began in May 1978. But in the early 80s, the central bodies decided to hold up he project. In 1985, the design was modernized, and after 1989, it was decided to complete the project. The plant was modernized continuously also during the construction, so today it ranks among the most modern plants of its kind in Europe. Some important technological entities were imported – Abel 400kV outlet from the French firm SILEC, enclosed 400 kV switch room from AEG Kassel, control system from AEG Wien, transfer circuit breakers from ABB Switzerland etc. The plant was put into operation in 1996.Main participants of the development
Investor | CEZ, a. s., Vodní elektrarny Stechovice |
Engineering investments supplier | Energotis, s. r. o., Loucna nad Desnou |
General builder of the development | Ingstav, a. s., Opava |
Technology general builder | CKD, a. s., Blansko |
Underground works supplier | Subterra, a. s., Tišnov |
Supplier of penstock armouring | Hutni montaze, a. s., Ostrava |
Supplier of transformers and motor generators | SKODA, a. s., Plzen |
Supplier of control system installations | Montaze Cakovice, s. r. o. |
Land property supplier | Pozemni stavby, Olomouc |
Asphalt-concrete sealing supplier | Slovasfalt, a. s., Bratislava |
General project engineer | Aquatis, a. s., Brno |