Publication date: 07.08.17
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Yaivinskaya GRES starts retrofitting of the power unit gas turbine

Yaivinskaya GRES Branch of Unipro PJSC is retrofitting the gas turbine and conducting intermediate inspection of the Power Unit No 5 steam turbine and generator.

The specialists of Siemens Gas Turbines Technologies LLC will carry out the retrofit works for the gas turbine in August this year.

Upon implementation of the envisaged measures, it is planned to increase the installed capacity of the CCGT up to 24 MW. In addition, this will provide for increasing the repair interval up to 4 years instead of the current 3-year period.

The project is unique because the 110-ton rotor of SGT5-4000F turbine assembled at the plant in Saint Petersburg has been delivered to Yaiva in the assembled condition. The railway platform has been unloaded at the repair site of the power plant steam-power unit with simultaneous use of two overhead travelling cranes. Then, the rotor has been taken to the main building of Power Unit No 5.

During the power unit shutdown for retrofitting, they will perform the required works including complete oil replacement in the power unit system, repair of the steam turbine valves, and additional works on the generator to improve the equipment reliability.