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一种基于EKFCM算法的电站脱硫系统目标工况库的建立方法

DOI: 10.13334/j.0258-8013.pcsee.2015.15.014, PP. 3859-3864

Keywords: 湿法烟气脱硫,综合评价标准,信息熵,基于信息熵理论的K均值和模糊C均值算法(EKFCM),目标工况库

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Abstract:

在对电站湿法烟气脱硫系统运行特性分析的基础上,建立了以系统运行成本为目标的综合评价标准,给出了从系统历史数据库中建立系统目标运行工况库的基本流程。提出信息熵理论结合K均值和模糊C均值的EKFCM算法,采用信息熵跃迁值差值来评价系统信息量有序程度,并以K均值聚类结果作为初始条件,并完成测试数据的聚类分析,测试结果表明该算法具有较高精度。以某600MW机组石灰石/石膏湿法烟气脱硫系统为对象,按照负荷和入口烟气SO2浓度将运行工况划分为多个工况簇,以pH值、液气比和浆液密度等可控参数为聚类输入,以单位SO2脱除成本为工况评价标准,从系统历史运行数据中聚类出各个簇内的目标工况,并建立了目标工况模型,得到了连续的最优目标工况库,可为现场运行人员提供实际参考。

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