基于模糊层次分析法的凝汽器真空降低影响因素分析与权重计算

ANALYSIS OF AFFECTING FACTORS AND WEIGHING CALCULATION FOR VACUUM REDUCTION IN CONDENSER BASED ON FUZZY ANALYTIC HIERARCHY PROCESS

针对凝汽器真空降低影响因素间的不确定性和模糊性,采用模糊层次分析法(FAHP)对各影响因素两两间隶属度进行判别。结合设备实际运行情况,构造了反映思维判断和客观事实一致性的模糊矩阵,从而可定量计算电厂凝汽器真空降低各影响因素的权重指标,找到最大的真空降低影响因素。以某电厂凝汽器真空降低的实例,验证了该模型识别凝汽器故障的准确性。

Directing against the uncertainty and fuzziness of affecting factors upon vacuum reduction in the condenser,the membership of every two affecting factors has been distinguished by using the fuzzy analytic hierarchy process（FAHP）.Combined with the practical operating conditions of equipments,a fuzzy matrix,which can reflect the consistency between predication of thinking and objective fact,has been constructed,thereby,the weighing indices of various factors upon the vacuum reduction in condensers of power plants can be quantitatively calculated,and the affecting factor can be found out.Taking the vacuum reduction in condenser of one power as practical example,the accuracy of identifying fault in condenser by using said model has been verified.