Power Machines supplied two radial-axial impellers for units No. 3 and No. 4 of Tupolangskaya HPP.
The equipment was manufactured at Leningradsky Metallichesky Zavod (LMZ) as part of the project to upgrade Tupolangskaya HPP. The contract for the design, manufacture and supply of hydraulic equipment for the four hydropower units of Tupolangskaya HPP was concluded with JSC "Uzbekhydroenergo" in 2019 and entered into force in April 2020.
Hydro turbines and generators with a capacity of 72.5 MW will be manufactured for new hydropower units (HU) No. 1 and No. 2. In addition, the scope of supply includes electrical equipment, APCS, generator excitation systems, pre-turbine gate valves and HPP auxiliary equipment. For the existing HUs No. 3 and No. 4 – new impellers, equipment for the upgrade of turbine control systems, APCS and excitation systems. Also, the scope of Power Machines obligations includes pre-commissioning services for the supplied equipment.
In the course of the upgrade, in addition to impeller replacement, HUs No. 3 and No. 4 will be equipped with modern turbine automation systems and automatic control of pre-turbine gate valves. The hydro turbines will be equipped with speed encoders, vibration sensors, a shaft runout sensor, overspeed protection unit, new instrumentation, and electrical wiring.
The commissioning of the four HUs will be carried out in stages; the project is planned to be completed in 2022. The total capacity of Tupalangskaya HPP will be 175 MW.
The construction of Tupalangskaya HPP is carried out in two stages. At the first stage, HUs No. 3 and No. 4 with a capacity of 15 MW each were put into operation. The equipment was manufactured by LMZ and the Electrosila plant. At the moment, the second stage of the project is in progress - the expansion of the plant's capacity to four HUs, due to the construction of two more units, No. 1 and No. 2, with a capacity of 72.5 MW, as well as the replacement of temporary impellers with standard ones and the upgrade of the control systems equipment for the small HUs No. 3 and No. 4.