2 April 16:44
At the Krasnoyarsk HPP of the En+ holding, the modernization of the main equipment under the New Energy program continues: during the overhaul of hydraulic unit No. 3, a rotor was installed in the crater of the hydraulic unit.
The rotor is one of the main components of a hydrogenerator, directly involved in the generation of electrical energy. Its weight is 900 tons. During a major overhaul that involves replacing the impeller of a hydraulic unit, it is removed, repaired, and then returned to its place – to the hydraulic generator. Such an operation places special demands on the qualifications of station specialists – any error or inaccuracy must be excluded.
“This is one of the key stages of capital repairs, in which the main repair departments of the Krasnoyarsk Hydroelectric Power Station and the contractor are involved. Equipment weighing about 900 tons and with a diameter of more than 16 meters must be placed exactly in the center. The rotor is lifted from the installation site by two cranes with a lifting capacity of 500 tons using a special crossbeam, carried through the machine room and installed in place. The process is not easy, labor-intensive, and the result always depends on the well-coordinated interaction of the team,” noted Deputy Chief Engineer of the Krasnoyarsk Hydroelectric Power Plant Alexey Kharitonov.
The overhaul of hydraulic unit No. 3 began in November 2025: before installing the hydropower rotor, the stator windings were re-lined, washed and painted, the stator iron and air coolers were repaired, the rotor was also repaired with the pole insulation restored, and a new impeller was installed in the turbine shaft. The modernized hydraulic unit will be introduced into the network this summer.
A comprehensive replacement of equipment at the Krasnoyarsk HPP under the New Energy program started in 2017. To date, seven out of twelve hydraulic units have been modernized. Hydraulic unit No. 3 will become the eighth. The remaining units are planned to be updated by the end of the first half of 2031.
By updating the equipment of hydroelectric power stations of the entire Angara-Yenisei cascade and extending their service life, the program allows us to meet the growing demand for electricity and support the development of industry in the region. After its completion, hydroelectric power plants will correspond to the best global indicators.
