METHOD FOR FORMATION OF PEAK POWER AT POWER UNITS OF THERMAL POWER PLANTS AND POWER UNIT OF THERMAL POWER PLANT FOR ITS REALIZATION

摘要

The inventions relates to thermal steam power plant with peak-load turbine and method of its operation. To form peak power at power blocks of thermal power plants, from high pressure cylinder 3 of basic turbine one takes part of worked-out vapor through 1-st and/or 2-nd takeoff branch. Vapor is overheated to 800- in high-temperature vapor superheater 6 and directed to peak-load turbine 26. Worked out in peak turbine 26 vapor is returned to low pressure section of basic turbine. Heating of feeding water is performed with additional heat from outlet section of basic boiler 1. Exhaust of peak-load turbine 26 is connected to bypass vapor conduits 30, 10, 31 between intermediate pressure cylinder 4 and low pressure section. To basic steam boiler 1 additional peak-load boiler 32 with high-temperature vapor superheater 27 and economizer 33 for heating feeding water can be connected. The invention promotes quick obtaining of peak power of power unit without overheating basic turbine with simultaneous increase of thermodynamic efficiency.