基于磷虾群算法的汽轮机组最优初压研究  

Study on the Optimal Initial Pressure of a Steam Turbine Unit Based on Krill Herd Algorithm

作　　者：牛培峰[1] 陈科[1] 刘阿玲 马云鹏[1] 赵振[1] 李国强[1] 

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004 [2]山东省莱西市院上镇中心中学,山东青岛266600

出　　处：《动力工程学报》2017年第8期615-621,648,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(61573306;61403331);河北省自然科学基金资助项目(F2016203427);中国博士后科学基金资助项目(2015M571280)

摘　　要：为找到汽轮机变工况运行时的最优初压,利用改进的磷虾群算法(A-KH)和快速学习网(FLN)建立热耗率预测模型,然后利用A-KH算法的全局搜索能力,在可行的压力区间内对所建模型热耗率最低时对应的主蒸汽压力进行寻优,并将优化后的最优初压曲线与厂家设计压力曲线进行对比.结果表明:优化后的最优初压曲线能有效降低汽轮机组的热耗率,对汽轮机的安全经济运行更具有指导意义.To solve the problem of a power unit that can＇t response the requirement of AGC control after low NO_x combustion retrofit on the boiler,a study was conducted on the combustion characteristics of the boiler,the regulating quality of the coordinated control system and the response ability of the AGC control,including an analysis on the effects of following factors on the NO_x formation,such as the oxygen concentration in the furnace,the openings of SOFA damper,surrounding air damper and secondary air damper etc.,while the influence of primary air combustion control on the unit response was investigated.On above basis,an optimized design and commissioning were carried out for the boiler-turbine coordinated control system.Results show that not only stable operation,but also high accuracy and quick response of the AGC control are achieved via the optimized coordinated control strategy,which has been successfully applied in low NO_x combustion retrofit of several units,proving the control strategy to be extendable and replicable.

关 键 词：汽轮机 热耗率 最优初压 磷虾群算法 快速学习网 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]