针对目前凝汽器背压对滑压值的修正无普适算式可供遵循的问题，通过作图法推理获得了滑压设定值与凝汽器背压及机组负荷之间的二元函数表达式；利用流量变工况计算方法解决最佳综合阀位的确定问题，在满足机组日常运行需求的条件下达到汽轮机高压调阀节流损失最小化；将提出的基于凝汽器背压和机组负荷的二元函数滑压实时优化和基于流量变工况计算的最佳综合阀位控制滑压实时优化方法相结合，将凝汽器背压对滑压值的修正作为粗调，将最佳综合阀位控制对滑压值的修正作为细调，共同实现对滑压设定值的实时调整。在某660 MW超临界机组上的应用表明，该方法能够节约供电煤耗约1.12 g/(kW·h）。

In view of the problem that no universal formula can be used to correct the slidingpressure according to condenser backpressure,a binary function expression between the value of the slidingpressure and the backpressure of the condenser and the unit load was obtained by drawing reasoning.The problem of determining the best comprehensive valve position was solved by flow calculation under varying conditions.Under the condition of satisfying the daily operation of the unit,the loss of throttling of steam turbine highpressure regulating valve can be minimized.The binary function slidingpressure optimization based on the backpressure of condenser and the unit load was combined with the proposed slidingpressure optimization based on optimal comprehensive valve position control,the correction by the condenser backpressure was used as coarse adjustment,and the correction by the optimal comprehensive valve position control was used as fine adjustment,so as to realize realtime adjustment of the setting value of slidingpressure.For a 660 MW supercritical unit,the application shows that this method can save the power supply coal consumption by about 1.12 g/（kW·h） .

TK221

国家重点研发计划（2016YFE0102500）