The construction of the PGU-420T power unit with an electric capacity of 420 MW and a thermal capacity of 220 Gcal/h began in 2011 as part of the investment project of Mosenergo JSC, conclude in 2010, in accordance with the contract for the provision of electric power to the wholesale electricity and capacity market. The functions of the General Contractor for the construction of the power unit were performed by TEK Mosenergo JSC; Mosenergoproekt, branch of TEK Mosenergo JSC, was the General Planner.
Main equipment of power units: SGT5-4000F gas turbine unit with a capacity of 289 MW with SGen5-1000А electric generator and SST5-5000 steam turbine with a capacity of 134.6 MW with SGen5-100А-2Р synchronous generator manufactured by Siemens, Ep-270/316/46-12.5/3.06/0.46-560/560/237 three-circuit drum waste-heat boiler of horizontal format with natural circulation manufactured by Krasny Kotelshchik Taganrog Boiler-Making Works, part of power engineering concern, OJSC "Power machines".
Trest SZEM CJSC, in accordance with the contract with TEK Mosenergo JSC, has installed a waste-heat boiler in the scope of supply of manufacturer, as well as installation of auxiliary equipment for the boiler compartment, which was not included in the factory supply, plant pipelines, lifting mechanisms of boiler compartment, process metal structures, stairs, service platforms, primary equipment for instrumentation (root valves, taps, embedded parts, etc.). The total tonnage of the mounted equipment was about 5,000 tonnes.
CHPP-20, located in the South-Western district of Moscow, was commissioned in 1952. Its installed electric capacity, without taking into account the new combined-cycle plant, was 730 MW, thermal capacity was 2400 Gcal/hour. The power plant provides heat and electricity to industrial and household consumers in Akademichesky, Gagarinsky, Lomonosovsky, Obruchevsky, Donskoy, Dorogomilovsky, Danilovsky, Yakimanka, Zyuzino, Kotlovka, Konkovo, Cheryomushki and Zamoskvorechye districts with a population of over 1.5 million people. The commissioning of the new power unit made it possible to improve the environmental performance of the power plant, to increase the reliability of power supply to consumers, and also provided additional opportunities for managing the parameters of the electrical power regime of the Moscow power system.