RusHydro and Power Machines completed the next stage of modernization of the Cheboksarskaya HPP. Hydropower unit No. 11 was put into operation with an updated rotary-blade impeller of the turbine and a new stator of a hydrogenerator manufactured by a Russian power engineering company.
As a result of the reconstruction carried out by Power Machines, the impeller blades of the turbine were able to change the angle depending on the water flow rate and head, which increased the efficiency of the hydropower unit. Now 15 of the 18 station’s turbines already operate in the rotary-blade mode. Besides, the turbines of the Cheboksarskaya HPP have an environmentally friendly design with oil-free impeller bushings. This eliminates the possibility of oil in the water.
Hydropower unit No. 11 became the eighth plant machine, where not only the turbine impeller was modernized, but also a new generator stator was installed. It has an almost perfect geometry, providing a uniform air gap between the stator and the rotor. This improves the performance of the hydropower unit and reduces vibration. The installation of the new stator, as well as the assembly of the reconstructed turbine, was carried out by specialists of the RusHydro subsidiary – Gidroremont-VKK JSC.
The modernization of the equipment of the Cheboksarskaya HPP continues: today, the assembly of a new stator has begun at hydropower unit No. 4. The turbine of this unit was reconstructed earlier, in 2012. The modernization of the Cheboksarskaya HPP is aimed at improving the safety and reliability of operation equipment of the power plant, reducing repair and operating costs. Its schedule has been agreed with the System Operator of the Unified Energy System and does not limit the power supply of consumers.