Optimization of Steam Source for Water Pump Turbine of Thermal Power Unit
The depth peaking of thermal generating units has become normal.Under the peaking condition of steam turbine units,the extraction pressure in four stages is low,which can not meet the safety operation requirements of feed pump turbine.The cold reextraction steam pressure is high and the feed pump speed fluctuates greatly during the steam source switching process,which seriously threatens the safety of boiler feed water system.The optimized power steam source adopts the steam pressure matching technology,and uses the cold reextraction of steam from the main engine of the turbine to inject steam in four stages after mixing,which meets the requirement of the power steam source pressure of the feed water pump turbine,and realizes the dual goals of safe operation and energy saving under the deep peak load condition.
depth peak regulationthermal power unitfeed pump turbinepower steam sourceenergy saving and consumption reduction
NETL
NSTL
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