核电站凝汽器变权重模糊健康度评价方法的研究

核电站凝汽器的健康度评价对设备运行维护具有重要的指导意义。提出了一种变权重模糊健康度评价方法。首先,通过数据机理得到相关的评价参数集,以评价参数作为失效依据,利用隶属度函数对每个评价参数进行状态评分,再利用状态评分计算参数集的模糊关系矩阵;然后,利用熵值法确定评价参数常权重系数,在此基础上,引入基于均衡函数的变权公式,结合变权重矩阵和模糊关系矩阵进行模糊综合评判;最后,得到了其综合健康度。利用该方法对凝汽器进行了健康度评价,结果表明,当设备运行进入异常状态时,可实现对故障的早期预报,提高了核电站凝汽器运行的安全性与可靠性。

Research on Fuzzy Health Evaluation Method of Variable Weight of Condenser in Nuclear Power Plant

The health evaluation of condenser in the nuclear power plant has important significance for the operation and maintenance of the equipment.A variable weight fuzzy health evaluation method is proposed.Firstly,the relevant evaluation parameter set is obtained through the data mechanism.Using the evaluation parameter as the failure criterion,the status of each evaluation parameter is firstly scored by using the membership function,and the fuzzy relation matrix of the parameter set is calculated by using the state score;then,the entropy method is used to determine the correlation parameter set.Based on the constant weights of the evaluation parameters,a variable weight formula based on the equalization function is introduced.Then the variable weight matrix and the fuzzy relation matrix are used for fuzzy comprehensive evaluation.And finally the comprehensive health degree is obtained.Using the method proposed to evaluate the health of the condenser,the results show that when the equipment is running into an abnormal state,it can realize early detection.This method improves the safety and reliability of condenser operation in nuclear power plants.