At Kursk CHPP of the North-Western District, the gas turbine unit No. 2 has been reconstructed

15 July 2020

The Quadra Company completed the reconstruction of the gas turbine unit GTU No. 2, which is part of the combined-cycle generating power unit CCGT-115 of the Kursk CHPP of the North-Western District (NWD CHPP).

The reconstruction of generating equipment is carried out upon reaching a specific operating time. In March of this year, GTU No. 2 reached a standard service life of 60 thousand hours. Specialists of the NWD CHPP replaced the exhausted gas turbine engine (GTE) with a backup unit that ensured normal operation mode of the GTU and whole combined-cycle power unit for the period of repairs.

During the June shutdown of the power plant for the scheduled maintenance, the power engineers installed an renewed GTE. The main elements were entirely replaced: compressors and turbines of high and low pressure, nozzle diaphragm, combustion chamber and sensors. Before launch, GTE combustion chamber was adjusted, and the auxiliary systems of the gas turbine unit were serviced.

Investments of PJSC Quadra amounted to 539 million rubles. The performed works restored the efficiency of GTU No. 2 to the designed parameters and guaranteed its smooth operation. Earlier, In October 2018, the GTU No. 1 was reconstructed here. As a result, the service life of the units was increased and the reliability of electricity and heat supply to the densely populated areas of Kursk was enhanced: North-Western, South-Western, Pobedy Avenue, AAS micro district.

Currently, in operation at NWD CHPP there are six hot water boilers, as well as CCGT-115 equipment: two GTUs LM6000 PD SPRINT with capacity of 45 MW each (manufactured by GE), a 25 MW steam turbine unit (Kaluga Turbine Plant), two steam waste-heat boilers (Machine-Building Factory of Podolsk).

The thermal capacity of the power plant is 710 Gcal / h, electric capacity – 116.9 MW. The fuel for the combined-cycle power unit is natural gas.

Fuel gas compression and supply to CCGT turbines under working pressure of 4.9 MPa is provided by a booster compressor station (BCS) supplied and commissioned by ENERGAS.

BCS consists of two compressor units with a unit capacity of 13 thousand m3 / h. Gas flow rate is controlled by a special two-level regulation system. Packaged screw-type CUs operate in automatic mode; the automated control system is integrated with the APCS upper level of Kursk NWD CHPP.

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