Aiming at the problem of feedwater flow fluctuation of a 1000MW secondary reheat unit equipped with 100％full capacity single steam driven feedwater pump under partial load conditions,the internal and external factors affecting the operation of feedwater pump is analyzed,and points out that the internal cause is the gentle characteristic curve of feedwater pump under partial load conditions,and the external cause is the fluctuation of main steam pressure affected by automatic control quality and primary frequency regulation.At the same time,it provides temporary operation solutions and complete solutions to the problems,so as to improve the economy and safety of the unit under low load operation.
feedwater flow fluctuationpump characteristic curveautomatic controlprimary frequency modulation
维普
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