电厂大型汽轮机双压凝汽器运行自适应优化研究  

Research on Adaptive Optimization of the Operation of Dual Pressure Condensers for Large Steam Turbines in Power Plants

作　　者：张美君 ZHANG Meijun(Huadian International Power Co.,Ltd.Shiliquan Power Plant,Zaozhuang 277000,China)

机构地区：[1]华电国际电力股份有限公司十里泉发电厂,山东枣庄277000

出　　处：《河南科技》2024年第7期29-32,共4页Henan Science and Technology

摘　　要：【目的】由于双压凝汽器的高、低压双侧压力在实际运行时和预先设计值之间存在较大差距,影响凝汽器的运行效益,因此提出电厂大型汽轮机双压凝汽器运行自适应优化研究。【方法】首先基于双压凝汽器真空度的影响参数的历史运行数据,引入灰色理论,构建一个电厂大型汽轮机双压凝汽器真空计算模型,将各影响参数代入模型中,即可输出未来时刻的双压凝汽器真空度预测计算值。然后以凝汽器最佳真空度精确控制为目标,利用粒子群算法寻找模型最优超参数。最后将最优超参数应用于双压凝汽器的真空运行中,实现自适应优化。【结果】研究结果表明,设计方法优化后的双压凝汽器循环水流量明显低于优化前,在1.2×10^(-4) kg/s~1.4×10^(-4) kg/s之间。【结论】该研究结果可以提高机组的运行效率和稳定性,有助于提升电厂大型汽轮机的节能运行效益。[Purposes]Due to the significant difference between the actual operation and design values of the high and low pressure dual sides of a dual pressure condenser,which seriously affects the operational efficiency of the condenser,a study on adaptive optimization of the operation of a large steam turbine dual pressure condenser in power plants is proposed.[Methods]Firstly,based on the historical sequence of the influencing parameters of the vacuum degree of the dual pressure condenser,a grey theory is intro⁃duced to construct a vacuum calculation model for large steam turbine dual pressure condensers in power plants.By substituting each influencing parameter into the model,the predicted calculation values of the vacuum degree of the dual pressure condenser at future times can be output.Then,with the goal of pre⁃cise control of the optimal vacuum degree of the condenser,the particle swarm optimization algorithm is used to find the optimal hyperparameters of the model,and the optimal parameters are applied to the vacuum operation of the dual pressure condenser to achieve adaptive optimization.[Findings]The re⁃search results indicate that the circulating water flow rate of the double pressure condenser optimized by the design method is significantly lower than before optimization,at 1.1.2×10^(-4)kg/s~1.4×10^(-4)kg/s.[Con⁃clusions]The research results can improve the operational efficiency and stability of the unit,and contribute to the energy-saving operation benefits of large steam turbines in power plants.

关 键 词：电厂大型汽轮机 双压凝汽器 运行优化 自适应优化方法 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]