As part of its participation in the reconstruction of the Cheboksarskaya HPP, Power Machines manufactured and completed the shipment of generating equipment for the hydropower unit No. 6 of the Cheboksarskaya HPP. The delivery set included the stator and tachogenerator of the hydrogenerator, as well as spare parts.
Work continues at the station - installation supervision related to the generator update at hydropower unit No. 4 has been finished today. The turbine of this unit was reconstructed earlier. A distinctive feature of this update is the increased reliability of the generator air coolers, due to the replacement of cupronickel with stainless steel in the material of covers and tube walls. This design made it possible to increase resistance to corrosion and reduce the fouling caused by zebra mussel, a common type of bivalve molluscs that live in fresh and brackish waters. Commissioning of hydropower unit No. 4 is scheduled for October 2020.
Hydropower unit No. 11 was commissioned last year, the eighth in a line, where a new generator stator was installed. It features a near-perfect geometry providing a uniform air gap between the stator and rotor, which improves the unit performance and reduces vibration.
The modernization of the Cheboksarskaya HPP is aimed at improving the safety and reliability of the plant's equipment, reducing repair and operating costs. Its schedule has been agreed with the System Operator of the Unified Energy System and does not limit power supply to consumers.