Kasyan P.V., Shevchenko M.V., Voyakin S.N., Dubkova E.S.

Application of a frequency-regulatory electric drive to reduce the operating costs of auxiliary needs of the GRES

Economical operation of modern powerful boilers and condenser turbines of hydrorecirculation stations (GRES) is possible only when auxiliary installations (mills, crushers, cranes, conveyors, pumps, fans, etc.) are required for the preparation and transport of solid fuel, air supply to the chambers burning fuel and removing combustion products and ash from them, supplying water to boiler units, maintaining a vacuum in turbine condensers, water supply to the station, and much more. Recently, the specific costs of heat power plants used are 25-30% higher than those of power plants that use modern technologies. One of the priority areas for the development of modern energy in Russia is the technical re-equipment and reconstruction of obsolete operating hydrorecirculation stations with the extension of their service life and the replacement of the main and auxiliary equipment with new ones with improved technical and economic characteristics. The priority in this case is to increase the efficiency of fuel use, energy and resource saving. The article discusses the main causes of uneconomical modes of operation of electric drives during operation in the auxiliary system of JV Raichikhinskaya GRES. To improve the performance and service life of the multistage centrifugal feed water pump PE 270-150-3, the article proposes the use of a frequency-controlled electric drive.

Keywords: AUXILIARY NEEDS, FEED WATER PUMP, ELECTRIC MOTOR, FREQUENCY-CONTROLLED ELECTRIC DRIVE