汽轮机背压变化对机组功率增量的影响

Effect of Back Pressure Variation of Steam Turbine on Unit Power Increment

汽轮机末级通常处在超临界状态。不考虑末级的某些变工况特性,在确定背压变化对机组功率增量影响时,以汽轮机功率方程为基础,对超临界工况下机组功率增量进行分析计算,推导出理想状态的功率增量计算公式;考虑到影响末级的某些变工况特性后,对机组功率增量进行了修正计算,提高了计算的实用性和精确度。

The final stage is often in supercritical state. When variable conditions are not considered and the effect of back pressure on unit lower increment is determined, the effect of supercritical condition on the lower increment is investigated based on the turbine lower equation. The formulation of lower variation with perfect state is established. Considering the effects of variable conditions on final stage, the unit lower is corrected, the practicability and accuracy of the calculation is further improved.