Abstract:

Highparameter steam turbines’steam distribution characteristics affect their operating economy and shaft stability under partial loads. Analyzing the steam distribution adjustment test of a 600MW supercritical unit, its steam distribution characteristics are studied. An optimal valve sequence, and the relationship between the load with optimal steam distribution mode and the opening degree of the main steam regulating valve are obtained. The results show that adjusting the steam distribution mode can effectively eliminate the selfexcited vibration  and improve the shafting stability without shutdown the machine. The research results can provide guidance for fault handling and optimized operation.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">selffont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">excited vibration, supercritical, steam distribution characteriscts, valve sequence, regulating valve, opening degree