某超超临界纯凝机组供热改造后转速飞升计算与分析

Calculation and Analysis of Speed Rise of an Ultra Supercritical Pure Condensing Steam Turbine Unit after Heat Supply Reformation

纯凝机组进行供热改造后,供热管道中的部分容积成为汽轮机的通流容积,其本质上增大了原机组的容积。文章以某超超临界汽轮机供热改造为研究对象,分析和讨论新增有害容积对甩负荷工况下转速飞升的影响,为类似机组供热改造提供参考。

After heat supply reformation of pure condensing steam turbine unit,part of the volume in the heating pipeline becomes the flow volume of the steam turbine,which essentially increases the volume of the original unit.This paper takes the heat supply reformation of an ultra-supercritical steam turbine as the research object,analyzes and discusses the influence of the new volume on the speed rise under load rejection conditions,and provides a reference for the similar units.