主蒸汽参数变化对机组功率影响的定量研究

针对电厂汽轮机运行过程中主蒸汽参数不可避免地会偏离设计值而引起机组功率和各项经济指标变化这一现象,以汽轮机功率方程为基础,根据汽轮机变工况工作的基本原理以及各参数之间的变化关系,推导出主蒸汽参数变化的功率增量方程。通过对具体机组的计算并将所得曲线与厂家提供的曲线相比较,结果表明该方程具有一定的计算精度,简单适用,能够满足工程的实际需要。

A Quantitative Study of Impact of Main Steam Parameters on Unit Output

Due to the phenomenon that the main steam parameters may deviate the design data inevitably during operation in power plant,thus causing unit capacity and each variable economic index variation,equations of power variation to the main steam parameters have been derivated on the basis of steam turbine power equation according to the relationship between the general principle of turbine off-design condition and variable parameter.Through the calculation for the actual unit and curve compared with that of supplier,it is demonstrated that the equation with calculation precision and applicability may satisfy the actual requirements of a project.